different types of sailboat hulls

The Definitive Guide to Sailboat Hull Types

If you’ve ever been on a sailboat or any kind of boat, one of the first parts of the boat you saw was its hull and you might not have even known it.

Simply put, the hull is the bottom part of a boat that rides in and on top of the water. When a sailboat is underwater, it’s accompanied by the keel and the rudder.

Just like knowing the different types of sails , knowing the hull type on your sailboat means you’ll have a better understanding of how your boat operates while it’s out on the water.

All in all, the hull of any boat is meant to keep the boat afloat and to ensure minimum resistance against the water while being propelled forward. Now let’s dive into the different sailboat hull types and even some other types of hulls in boats in general!

Main Sailboat Hull Types

There are two main hull types that we’ll be looking at that encompass the many other types of hulls that vary from these two main types.

Depending on the type of boat you have, you’ll be floating around with one or the other. We’ll take a look at what you can expect if your boat has either of these hull types.

Displacement Hulls

The most common sailboat hull type you’ll find out there is the displacement hull, which is very effective at pushing the water aside and powering through it during forward propulsion.

A displacement hull is often found not only on sailboats, but also fishing, freight, cruise, and other larger boats.

All boats that have a displacement hull will be limited in their speed based on the waterline length of the hull. Regardless of how much power you use, whether it’s from the wind or motor, the maximum speed can’t be increased.

This is why you’ll see people mention the waterline length of a boat’s hull when putting them on the market to sell.

The big advantage of having a displacement hull is that they require far less power to get moving across the water compared to the other main hull type; the planing hull.

What this means is that your boat will be able to cruise for a long time with the same amount of energy, which also allows you to carry more items on board.

Planing Hulls

It’s almost guaranteed that your sailboat won’t have a planing hull since they’re most commonly found on powerboats and personal watercrafts (PWCs), like jet skis.

Planing hulls allow the boat to lift itself out of the water, reducing drag and increasing the speed of the boat.

Almost any boat that’s equipped with a planing hull will be able to attain a speed much greater than a boat with a displacement boat.

The main reason for this is the lift that’s produced when traveling at high speeds which reduces drag on the water.

The maximum speed of a boat with a planing hull is dependent on the horsepower of the engine and how much of the hull can be removed from the water while still cruising.

The biggest advantage of having a planing hull is that your boat will be able to pick up speed quickly and reach a greater maximum speed.

This allows for shorter journey times. However, there needs to be a source of all that energy, which comes directly from a combustion engine. The faster a boat with a planing hull goes, the larger the cost of fuel will be.

How Planing Works

The way planing works is actually pretty interesting, so I thought I’d dive into it a bit. Even though a sailboat is virtually guaranteed not to have one, it’s always nice to know how other boats operate while out on the water.

1. Displacement

Before a boat with a planing hull actually planes, it starts out acting like a displacement hull.

As a matter of fact, a boat with a planing hull needs to reach a certain speed before it starts to produce lift. Before that happens, it’s essentially a displacement hull.

While a boat with a planing hull is picking up speed and lifting itself out of the water, it’s in a plowing mode.

You’ll know when a boat is in plowing mode when the bow of the boat is elevated and the boat is throwing a relatively large wake. The goal, however, is to move from plowing mode to planing mode, which requires further acceleration.

Once the boat with a planing hull reaches a certain speed, it’ll leave plowing mode and enter planing mode.

As I already described, planing is when the hull is gliding across the water with a smaller amount of the hull dragging in the water when compared to the previous modes. Different boats will start planing when reaching different speeds.

Common Sailboat Hull Styles

Now that we’ve gone over the two main types of hulls you’ll find in sailboats and other types of boats, we have a good foundation for the hull styles you’ll commonly see when out on the water.

There are three main hull styles that you’ll see quite often, so let’s take a look at those.

By far the most common hull style you’ll see on sailboats is the monohull, which is simply a single hull.

Traditionally, a sailboat will have a monohull and they can be found all over the place. It’s probably the style of hull that comes to most peoples’ mind when imagining a sailboat.

Monohulls on sailboats are virtually all displacement hulls. As we went over previously, this allows your sailboat to cruise for long stretches and has a greater efficiency compared to planing hulls.

However, most boats that exist on planet earth are monohulls, including powerboats, which can also be of the planing hull type.

When it comes to a monohull on a sailboat, the only way it can keep its stability is to have a proper keel attached to it.

A keel is a wing-like object that sticks out of the bottom of the hull in the water and provides a sailboat with ballast for stability. It’s important to understand how a keel works when operating a sailboat with a monohull since it’s one of the main reasons a sailboat can move forward without tipping.

There are certainly a lot of monohull sailboats out there, but there’s no doubt that you’ll also see your fair share of catamarans.

Catamarans are sailboats with two hulls and operate quite differently than their monohull cousin. Catamarans are known to be fast and are likely to outrun most monohull sailboats.

Unlike monohull sailboats, catamarans can be fitted with displacement hulls as well as planing hulls. However, even if they have a planing hull they can still produce a relatively good amount of cruising time and do so rather efficiently.

Catamarans are a bit different than monohulls in the sense that they can reach greater speeds. There are several reasons for this. For one, a catamaran doesn’t need a ballast for stability since the broad stance between the two hulls provides enough stability.

This means there’s no need for a large, heavy keel. Second, they’re often built out of lightweight materials that allow the boat to reach a higher maximum speed compared to heavier sailboats.

Also, if a catamaran has a planing hull, it’ll have the ability to produce lift resulting in reduced drag on the water and even greater speeds.

Unfortunately, catamarans do have the disadvantage of being more likely to capsize in unwanted high-wind situations.

Also, it’s very difficult for a catamaran to recover from capsizing as opposed to a monohull sailboat that has a good ballast from its keel.

You might have already guessed from the name, but I’ll state the obvious anyway. A trimaran is exactly like a catamaran but with three hulls instead of two.

Often times you’ll see a trimaran look like a monohull sailboat with a pair of hulls attached to its side.

Similar to a catamaran, trimarans can hit speeds much greater than your average monohull sailboat. As a matter of fact, they’re known to be “unsinkable” under the situation that the hulls on the port and starboard side of the central hull are completely filled up with water.

One of the coolest aspects of having a trimaran is that when it has a planing hull and/or a hydrofoil, the trimaran’s central hull will lift completely out of the water.

This gives it the effect that it’s floating across the air, which is the result of lift produced from the planing hull or a hydrofoil. It’s very cool to see this!

Sailboat Hull Bottoms

Apart from the main boat hull styles, like the monohull, catamaran, and trimaran, there are hull bottoms that pop up in the world of boating that can differ in style and function.

These hull bottoms are more of a deeper look at the hulls of a monohull, catamaran, or trimaran, so you can think of them more as a feature of any of the previously mentioned styles of hull.

Flat Bottom

A very common hull bottom for boats that are derived from the planing hull type is a flat bottom hull.

The flat bottom hull is considered to be one of the less stable styles of hulls, especially when confronted with rough waters.

However, you’ll often find them on boats that don’t necessarily ride in these situations, including fishing or taxi areas.

• Good for small lakes and rivers due to having a shallow draft.
• Able to hit relatively high speeds once entering planing mode.

Disadvantages

• Not good at handling choppy waters resulting in a rough ride.

Round Bottom

When it comes to sailboats, you’re most likely going to run into monohull sailboats that have a displacement style hull with a round bottom.

While these are the most common hull bottom for sailboats, they can also be found on smaller boats that are used for fishing, canoeing, and other similar kinds of boats.

• Easily moves through the water due to being a displacement hull type.
• When accompanied by a keel, it produces a great amount of stability from the ballast.
• Without a keel, it can roll when entering and exiting the boat as well as when waves are present.
• Less maneuverable compared to other hull styles.

Deep ‘V’ Bottom

If you’re operating a powerboat, then in all likeliness your boat has a planing hull with a deep ‘V’ bottom.

Since deep ‘V’ bottoms are found on planing hulls, these types of boats will be able to pick up speed quickly and at high maximums. This is the most common setup for powerboats out on the water.

This is the most common type of powerboat hull. This hull type allows boats to move through rough water at higher speeds and they provide a smoother ride than other hull types.

• Provides a smooth ride compared to its flat bottom rival.
• Good at handling rough water.
• Requires more power to plane compared to its flat bottom rival.
• Cannot handle sharp turns very well resulting in potential rolling or banking.

Multi-Chine Bottom

We took a good look at multi-hull styles like the catamaran and the trimaran earlier, which are the exact style of hulls that have a multi-chine bottom.

A multi-chine bottom is a great example of a displacement hull on either a catamaran or trimaran as it’s the most common bottom you’ll find.

• In a multi-hull boat, it has a great amount of stability due to its wide beam.
• In a multi-hull boat, it needs a large area when either tacking or jibing.

Main Parts of a Sailboat Hull

There’s some terminology I threw around while describing the many types of hulls a sailboat and other types of boats have.

As is the case with a lot of activities, learning the terminology is just something you have to do.

Thankfully, the terminology will eventually sink in overtime and eventually you’ll be able to ring off any hull terminology that comes up.

The bow is simply the most forward part of a sailboat and, thus, the very front of the hull.

The stern, conversely to the bow, is the most backward part of a sailboat and, thus, the very end of the hull.

The port side of a hull is the left side. I always remember this with the phrase “I left my port on the table”, with the port being wine.

This just so happens to also be the side where boats will have a red light turned on at night, which is the color of port wine.

The starboard side of a hull is on the right side.

Opposite the port side, in the evening boats will have a green light turned on and will be located on the starboard side of the boat.

Fore is a sailor’s way of saying “forward”.

Aft is a sailor’s way of saying “back”.

A transom is the aft-most (see what I did there?) section of the boat that connects the port and starboard sections of the boat.

The flare of a hull is where the hull starts to form a large angle the closer the hull gets to the deck.

The waterline is the line around the hull where the water touches when under a normal load.

Waterline Length

The waterline length, once referred to as the Load Waterline Length (LWL), is the length of the hull where the waterline is located.

This is not the entire length of the boat.

Length Overall (LOA)

The length overall (LOA) is, you guessed it, the overall length of the boat. This is measured from the tip of the bow to the end of the stern.

The freeboard is the space on the hull of a boat above the waterline and below the deck.

The draft is the length from the bottom-most part of a boat (the tip of the keel on a sailboat) and the waterline.

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13 Types of Sailboat Hulls (Including Photos!)

Explore 13 sailboat hull types with photos! Ideal for travelers seeking the perfect sailboat for speed, stability, or rough waters.

A sailboat is only as good as the hull, and it ultimately determines how well you can navigate through the water. The hull of a boat plays a massive role in what type of water you can sail through and your overall speed. So, what are the types of sailboat hulls and how are they different?

The main types of sailboat hulls are planing hulls, displacement hulls, and semi-displacement hulls which offer the best of both worlds. Multi-hull boats such as pontoons and tritoons have even weight distribution and can handle rough waters. Flat-bottom sailboats are the most stable, but they don’t work well in deep waters.

Catamarans and trimarans feature space between each hull which adds stability and protects the deck from water. Choosing a sailboat with the ideal hull for you is essential in finding one that you will keep for years to come. Follow along as we explore the different types of sailboats and see what makes them unique.

Sailboat Hull Types

There are 13 types of sailboat hulls ranging from bilge keels and fin keels to displacement hulls. The ideal sailboat hull varies for you based on factors such as what type of water you’re in and weather conditions.  For example, some hulls, such as flat bottoms, are ideal for shallow and smooth water .

On the other hand, semi-displacement hulls are perfect for every application whether you’re in shallow or deep water. Let’s take a look at the different types of sailboat hulls and see how they differ.

1. Planing Hull

Sail Magazine

Planing hulls are the first of the three major categories of sailboat hulls. You can find planning hulls with 2 different shapes: v-shaped and flat-bottom hulls.  Planing hulls sit on top of the water and don’t sink deep like other types .

Many boaters and enthusiasts prefer this design because of how well a boat with planning hulls can move across the water.  Most fishing sailboats feature planning hulls because of how smoothly they can glide on the surface whether you’re on an ocean or lake . Boats with planing hulls can also move faster than other types of boats, and that is their main appeal.

2. Displacement Hull

Improve Sailing

Boats with displacement hulls are slower than boats with planing hulls, but that doesn’t mean that they’re bad . While they don’t move as fast, many boaters consider displacement sailboat hulls to be much smoother.  This comes in handy if you live in an area with rough waters and strong winds .

A displacement hull is rounded instead of flat at the bottom like a planning hull. The main downside to sailboats with displacement hulls is that you will likely use more fuel than you normally would. That is because the shape isn’t as aerodynamic and you’ll need the extra engine power to move through the water.

3. Semi-Displacement Hull

Seattle Yachts

As the name suggests, semi-displacement hulls combine the best of both worlds between planing and displacement hulls. A semi-displacement hull is both flat and rounded at certain parts providing both speed and stability.  They aren’t as fast as a flatter planing hull, but they’re faster than a standard displacement hull .

The unique shape of semi-displacement hulls helps reduce resistance. This alone can help take a load off of your engine and let it work optimally under most water conditions. You also get the benefit of extra storage in most cases because boats with semi-displacement hulls have storage-friendly floor plans.

4. Multi-Hull

Multi-hull boats, such as pontoons and tritoons, are smooth and easy to sail . There are separate hulls on each side of the boat that provide stability and let you power through rough waters. On a pontoon, each hull is a large tube filled with air known as a toon.

Multi-hull boats generally sit higher above the water than most boats because of their unique design. They are popular for fishing, cruising, and entertainment.  A key downside to multi-hull boats is that they typically operate loudly because the propeller may not be fully submerged in the water .

5. Monohull

The vast majority of sailboats that you will come across have a monohull . They are easy to sail, transport, and even dock at a marina because of their simple design. As the name suggests, they only feature one hull and are suitable for calm and rough water.

You can save money with a monohull sailboat compared to a multi-hull sailboat like a catamaran. A key advantage to monohull sailboats is that they are incredibly safe. You don’t have to worry about capsizing as much as you would with a multi-hull sailboat.

6. Flat-Bottom

Sailing Magazine

Flat-bottom hulls are essentially the simplest form of planning hulls. You can find flat-bottom hulls on the majority of sailing dinghies, and that’s what they are most suitable for.  They aren’t ideal for oceans or rough waters, but flat-bottom sailboats are perfect for rivers and lakes .

Rowboats also feature flat-bottom hulls, and they aren’t known for being particularly smooth. You get less precision with flat-bottom hulls, especially if you have to steer and turn unexpectedly. Otherwise, you won’t have trouble with a flat-bottom sailboat hull if you go out for a quick fishing trip in an area you’re familiar with that has smooth waters.

7. Catamarans

Catamarans feature a unique take on the traditional multi-hull design . They feature 2 hulls with space between them that usually features a deck. Sometimes, the space between each hull features a trampoline or even a small pool or tub.

They aren’t suitable liveaboard boats, but they are perfect for taking out for a day of cruising and fishing. Catamarans are as smooth as possible, but that sometimes comes at the cost of speed. However, they often feature multiple engines which can consume a lot of fuel but also put less strain on each engine.

8. Trimaran

Quiberon 24 Television / Youtube

Trimarans are essentially a step up from catamarans because they feature a third hull. Many people prefer the stability that trimarans offer over catamarans.  The extra stability also helps increase the speed that you can cruise at with a trimaran .

They are also safer than catamarans because the multi-hull design allows for perfect weight distribution. That’s not to say that catamarans are unsafe, but the extra hull that trimarans feature is more durable.  Most of the weight lies on the center hull and the rest is distributed between the 2 outer hulls .

BlueWater Yacht Sales

Deep v hulls are another type of planing hull, but they are less common than some of the other varieties. Granted, high-end modern powerboats often feature a deep v hull, but they come at a high price.  The v design allows the hull to cut into the water easily which lets you easily control the boat in any type of water condition .

Generally, the deadrise goes between 21 and 26 degrees for a deep v hull which is ideal for many boaters. However, boats with deep v hulls are primarily geared toward anglers and aren’t ideal for cruising at high speeds. Deep v hulls are usually made out of aluminum which means that they will be loud as they glide across the water.

10. Bilge Keel

Bilge keel hulls are specifically designed to reduce the risk of a boat rolling . The strange shape of a bilge keel hull lets it stand upright whether you’re on the shore or in shallow waters. This makes them much easier to maintain than many other types of boats.

The bottom of a bilge keel hull features multiple fins in a row that helps ensure a smooth ride. They never feature more than 2 keels which means that they have a shallow draft and you can easily beach them. The one downside to sailboats with a bilge keel hull is that they are difficult to transport to a port because of the bottom.

11. Bulb Keel

Bulb keel sailboats feature a teardrop-shaped ballast that increases the boat’s stability.  They are even faster than bilge keel sailboats because of how hydrodynamic they are . Unlike some types of hulls, a bulb keel works just as well on the sea as it does on lakes and rivers.

They feature incredible weight distribution because of the inclusion of an extra ballast. However, you have to be careful with bulb keel sailboats in shallow waters near the shore. They are more susceptible to damage at the bottom so they can be difficult to bring to shore and require precision.

12. Fin Keel

Jordan Yacht Brokerage

Unlike bulb keel and bilge keel hulls, fin keel sailboats are perfect for raising . Fin keel hulls improve the draft of a sailboat which comes in handy when you want to reach high speeds. Some sailors use fin keel sailboats to travel long distances across the water, especially if the weather is in their favor.

They are a perfect happy medium between flat and round-bottomed hulls offering the best of both worlds.  Fin keel sailboats are also quite comfortable because of the unique bottom shape that can easily handle choppy waters . With that said, they aren’t ideal for beginners because they can be difficult to steer compared to standard flat-bottom hulls if you are inexperienced.

13. Cathedral Hull

Jeff Clark / YouTube

Cathedral hulls get their name from their appearance which is similar to that of a classic cathedral. The unique appearance is one of the biggest benefits of cathedral hulls because the whole boat takes on that shape. They feature sharp bows and high sterns that are immediately recognizable.

With that said, cathedral-hull sailboats can be difficult to steer compared to flat-bottom or rounded hulls because of their bulky shape . You get plenty of storage with cathedral hulls which makes them perfect for long day trips with many people. They are incredibly stable because of the wide beams and wide berth, so there isn’t a serious risk of capsizing as long as you pack your cargo well.

What Type of Hull is Best For Rough Waters?

Any type of boat with a v-shaped hull is best for rough waters. Whether it’s a deep v or shallow v, this hull design makes it easy to cut through rough water without getting too much on your deck.  The last thing that you want is to go through rough waters and take on excess water weight onboard .

They are specifically designed to glide across the water without sinking low which is necessary for choppy waters. Boats with v-shaped hulls also often come with high-performance engines, so they offer the best of both worlds.  Generally, deep v hulls are the most precise and smoothest when it comes to rough waters .

They are perfect for keeping course which is essential if you’re in rough waters that can kick you off of your path. You can find many deep v hulls that are made out of fiberglass which is incredibly durable and withstand water exposure. Fiberglass v-shaped hulls are also easy to repair either by yourself or at a professional shop at a low cost.

What is The Most Stable Hull Design?

Flat-bottom hull sailboats have the most stable design for shallow water and multi-hull boats are the most stable in deep water. The inclusion of multiple hulls adds stability in deep water that prevents water from landing on the deck. This can save you expensive repairs and can also prevent your sailboat from capsizing.

Pontoons and tritoons are multi-hull boats and they are specifically popular because of their stability.  You can’t find a more stable design than a flat-bottom hull if you plan to cruise in shallow waters . Flat-bottomed hulls are also typically the fastest when you aren’t far from shore, especially if you are in smooth waters.

The box shape of flat-bottomed hulls is conducive to gliding across shallow water. However, they struggle to ride across waves and choppy waters because of the wide surface area. Multi-hull boats such as pontoons and tritoons are the best option if you plan to take your boat out to lakes, rivers, and oceans because they thrive in any scenario.

What is Better Flat Bottom or V-Hull?

Flat-bottom boats are better than v-hull boats for most uses, but v-hulls are better in choppy and deep waters. You can get by with a flat bottom in oceans and lakes alike, but they don’t always do well in deep water.  Conversely, v-hull boats can tear through rough and wavey water even at steep depths .

V-hull boats don’t do well in shallow waters and you are more likely to get stuck than you would be with a flat-bottom boat. Of course, you can always have someone push from behind when you depart, but that doesn’t help much when you return to shore.  V-hull boats are the better option for deep waters, however, even if you are in rough water .

Flat-bottom boats take on more water than v-hull boats unless you stay in calm waters. It’s always worth choosing a boat that won’t take on water that will weigh it down. However, if you’re looking for a reliable boat with a high capacity, then I would recommend looking into v-hull boats.

What Type of Hull Cuts Through Water?

Displacement hulls are the best at cutting through the water, especially when compared to planing hulls. They don’t rely on a powerful engine to cut through the water because of their design. Displacement hulls displace water once you lower them in from the shore.

This displacement isn’t ideal for speed, but it is perfect for rough waters and strong winds.  You can take sailboats with displacement hulls out on the ocean without having to worry about waves . They also work well in freshwater, but they are less necessary because of the lack of waves compared to the ocean.

Otherwise, you can get the best of both worlds with a semi-displacement hull . They aren’t quite as precise as displacement hulls, but they are better at navigating choppy waters than planing hulls. You sacrifice a little bit of speed, but the shape of a boat with a displacement hull lets you power through waves without veering off of your path.

How Long Do Sailboat Hulls Last?

Sailboat hulls last for an average of 15 years, but many of them can last for 20 years or longer. It ultimately depends on how well you maintain them and how often they are in the water.  For example, a sailboat that you always keep in the water and rarely store in a dry place may need hull repairs and replacement much sooner .

Sailboat hulls are susceptible to algae damage, and that is more likely if you always keep them in the water. Cleaning the hull of a boat is essential to protect them from algae and examine them for potential damage.  Fiberglass is the best material for a boat hull, even compared to aluminum which was the standard for years .

Fiberglass hulls can last for up to 50 years or more with regular cleaning and maintenance. A sailboat’s hull won’t last as long if it suffers damage neglecting maintenance or hits the shore too fast. The best way to increase the longevity of your sailboat is to take it out of the water every once in a while and scrub the hull to remove algae.

How Do You Inspect a Sailboat Hull?

The best way to inspect a sailboat hull is to take it out of the water and clean it . You can easily inspect a sailboat’s hull if it is clean and dry, or else you will mix cracks and dents. Cracks are the most important thing to look out for because it’s best to catch them early on.

You should be concerned if you come across cracks because they can eventually worse and threaten your boat’s structural integrity. This is especially true if you have a sailboat with an aluminum hull that you regularly take out onto saltwater.  Aluminum can eventually break down in saltwater so it’s important to inspect it regularly, especially after 10 years or more .

The hull is the first part of a boat that you should inspect because hull damage can cause a boat to sink. Always inspect your boat’s hull if you sail too fast in shallow water because that is when you risk the most trouble. Clean and dry your boat’s hull, then follow along it closely to look for spots that don’t glisten as much. This will indicate a weak point, scratch, tear, or dent.

Fastest Sailboat Hull Design

Multi-hull, trimarans, and flat-bottom boats feature the fastest sailboat hull designs . They are hydrodynamic which lets them glide through the water with minimal resistance. Trimarans move incredibly fast, especially in salt water, as long as they aren’t weighed down with too much cargo.

Careful packing reduces the necessity to haul less cargo because trimarans have incredible weight distribution. However, factors such as water conditions and what type of body of water you are on ultimately play a huge role.  Boats move up to 2% faster when in saltwater than in freshwater no matter which type of sailboat hull design you have .

Other factors such as your boat’s capacity and how much cargo you are carrying make a huge difference as well. Any type of boat with a planing hull is a safe bet if you want to move quickly through the water. Avoid sailboats with a displacement hull if you value speed because they often move the slowest.

So, What Are the Types of Sailboat Hulls?

The three main types of sailboat hulls are planing hulls, displacement hulls, and semi-displacement hulls.  Bilge keel, bulb keel, and fin keel hulls are similar but have different practical applications between freshwater and saltwater . Trimarans and catamarans feature sturdy hulls that are highly regarded for their even weight distribution and roomy storage.

Multi-hull boats such as pontoons and tritoons sit above the water and can withstand rough waters because of how high they sit. Displacement hulls are the best option if you need to cut through choppy waters and maintain your routing. Otherwise, consider a flat-bottomed hull if you primarily stay in shallow water because of how stable they are.

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Boat Hulls 101: Complete Guide to Boat Hull Types, Shapes, and Designs

Table of Contents

Last Updated on August 17, 2023 by Boatsetter Team

If you’re new to boating, then you may not have even considered a boat’s hull , its importance, and the way that it affects your time on the water. With the  hull  being the part of the boat in the water, it is perhaps the most important part as it gives your boat the ability to float. Not only that, but it affects every single characteristic of your boat and the smoothness of your ride. This article on boat hulls will equip you with the technical knowledge and expertise necessary to understand hulls and the way they work.

What is a Boat Hull?

First of all, we’ll go into a bit of detail on what a boat hull is. The hull is the body of the boat. It is sealed to prevent water from transmitting its way through and keeping your boat afloat. A hull can be open where you sit in it, such as a small dinghy, or a deck may cover it as you would find on a yacht.

When there is a deck placed on top of a hull, it opens up many more options for utilizing the space on your boat more appropriately as it is raised to the top of the hull, where more space is apparent. For example, on a deck, you can place a cabin -like you would find on a center console or even a mast and sail rigs to create a sailboat.

When the hull is open, options to use your space effectively are reduced as you sit at the bottom of the bowl shape. In addition to having less space, you also feel the rock of the water in a more pronounced manner as it is just the keel of the boat (the bottom) separating you from the water. Therefore, every wave and lurch in the water that rocks the boat is felt, which may cause you discomfort if you haven’t quite found your sea legs.

Why Are Hulls Important?

The knowledge of how a boat floats is fundamental if you are looking to get into boating. Without actually knowing, you put yourself at risk of compromising your boating activities and creating a danger that you cause your boat to sink. The key line to this knowledge is that the air encapsulating your boat must be denser than the water it sits upon. This not only includes the air but the items on your boat as they contribute towards the pressure that your boat’s hull puts upon the water.

The greater the amount of weight your boat holds, the further it pushes itself into the water, lowering or raising the level that your hull sits in the water. This force displaces the water to a level that is equal to the boat. If the average density of the boat is greater than the water, then the boat shall sink. You can see this in action if you have a small dinghy; the more people you place on it, you’ll notice that your boat edges itself ever so slightly more into the water as the boat’s weight is rising.

Different types of Boat Hulls

We’ll now walk you through the different types of boat hulls that you come across. The design of the boat’s hull changes the type of boat that you have. If you are browsing through our boat rentals, you’ll notice the various types of boats. Each of these boats has a different type of hull design. For example, a pontoon boat rental is designed for calm waters, whereas a giant yacht is designed for taking on the rough seas, meaning that their hulls vary greatly.

There are two main types of hull: displacement and planing. We’ll give you the rundown of both of these types and the other sub-varieties within them.

Displacement Hulls

The first variety of hulls that we shall examine are displacement hulls. These hulls are typically found on boats that need to carry a heavy load, such as a large fishing boat and big yachts. The hull sits deeper into the water, and the boat is supported by buoyancy, as opposed to its thrust.

Due to the boat sitting deeper in the water, it might be slower, but it will ride steadier. These larger boats are particularly good for the sea as they can handle stronger waves and currents as the boat can stabilize themselves better. This is why you’ll see container ships and other varieties that need to bear a heavy load using these types of hulls.

When it comes to boat rentals, you are most likely to find a sailing boat with a displacement boat hull. The hull is rounded at the bottom, allowing the sailboat to lurch strongly to one side while turning without any danger of capsizing. Thus, we can see the impact that the hull has on your boat rental as it gives your sailboat the extra capacity to lurch around sharp turns and enjoy some exhilarating fun.

Planing Hulls

The other main type of hull is the planing hull. This hull’s design allows the boat to accelerate to higher speeds due to less hull being placed in the water. When a boat with a planing hull is cruising at lower speeds, it operates similarly to a boat with a displacement. When it starts to hit around 15 knots, things start to change depending on the weight of the boat’s load. The flatter surface of the planing hull allows the boat to propel itself upwards to skiff itself across the water. This is what causes boats with planing hulls to obtain higher speeds. In addition, because the bulk of the hull is not placed below the water’s surface, there is less tension from the water holding the boat back, meaning that it can move through the water faster and using less power to obtain a speed that a boat with a displacement hull can.

There is not only one type of planing hull but instead many different varieties. We’ll look through these varieties to examine how it affects your boating experience so that you can make a more informed decision when choosing your next boat rental.

Flat Bottomed Hulls

As the name suggests, these hulls do not have the traditional curved hull that reaches a point at the bottom but has a flat surface instead. These tend to be small skiffs or fishing boats where you cast out from. Due to them having a flat hull, they are excellent for getting into shallow water where some of your favorite catches may lie. These boats don’t need much power for the planing power to come into action and reach quick speeds in no time. They also tend to handle well not just on the flats but also on the sea, with choppy water not being a big issue. So, if you’re looking for some gentle fishing on the flats or maybe out in some nearshore waters, check out our range of small flat bottomed hull boats to truly enjoy some great fishing experiences.

Pontoons  are one of the great boat rentals for cruising around and enjoying time with friends because the design of their hulls allows for more space to be created. Pontoons have two-cylinder hulls that sit parallel to each other on the surface of the water. The deck is placed atop these two cylinders, and because they are placed on cylinders, the deck can expand beyond the cylinders, creating more space. This allows for a comfortable seating/social area to be created on the boat, allowing you to use it for parties and some relaxed exploring with the wider family. These boats are best used on inland and flat waters. This is due to waves rocking them a lot more, and a storm at sea can even put them at risk of capsizing. For some fun on a lake, however, pontoons are hard to beat.

In recent years many tritoons have started to crop up on the boat rental market. These are similar to pontoons, but they have a third cylinder that gives them some extra stability. It also means that they can handle a more powerful engine that can bring them up to higher speeds than a pontoon boat. If a pontoon has an engine that is too powerful, then its planing hull can lift it too far above the water’s surface, causing great instability. However, when it comes to tritoons, the greater speeds that you can reach allow you to expand upon other activities and add in some wakeboarding or tubing action onto your party on the water!

V Bottom Hull

The shape of a v bottom hull has a sharper decline that accumulates in having a meeting point at the bottom, creating a v shape, as stated in the name. Because of the honed hull, one of these boats can cut through the water at decent speeds and are particularly good when out on seawater. However, they require a powerful engine for the boat to go into a planing mode. One of the most common types of v bottom hull boat rentals is center consoles. These are great vessels for going for some nearshore or offshore fishing or some general saltwater exploring. Their v bottom hull allows them to cut through the waves so that you can rush to the best fishing grounds in no time at all.

The tri-hull design is a variation of the v bottom hull. It has a v-shaped hull in the center and two parallel smaller hulls on either side of the main central one. This gives the tri-hull boat some extra stability when going forward . Additionally, this also allows the boat to have more deck space as the hull covers a wider range. One of the big drawbacks of the tri-hull – also known as a cathedral hull – is that the bat rocks more when it is in choppier water because the hull is wider. Nevertheless, tri-hulls make for a great option for fishing or exploring on lakes or calm coves.

Catamaran: A Multi-Hulled Boat

Perhaps the most popular multi-hulled boat is the catamaran. This type of boat has two separate hulls that run parallel to each other. These hulls sit on either side of the boat and the deck connects them. This type of design allows forecast amounts of space onboard . Many catamarans are luxury boats that can have the space to hold swimming pools and even helipads. Because they have dual hulls, catamarans can get themselves in shallow waters and lagoons where other luxury boats cannot. This makes them the perfect boat rental if you plan to visit a location where there are multiple small islands such as Hawaii or The Bahamas. The multi-hull system also provides a lot more stability and comfort, so they are perfect boat rentals if you are prone to suffering from seasickness . Catamarans are not only luxury liners as smaller versions with a trampoline-designed deck can also be found that make for great day adventures.

As we hope you have been able to discover in this blog post, the type of hull that your boat has affects everything about your boat. By having a little bit of knowledge on how the design of a boat’s hull has an impact on your boating experience, you can begin to make more informed decisions on which boat rental is best for you. To reinforce this information a little bit further, check out this  video !

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Sailboat Keel Types: Illustrated Guide (Bilge, Fin, Full)

The keel type is one of the most important features of your boat. But the different designs can be confusing, so I've set out to create a very clear guide that will help you understand sailboat keels once and for all.

What are the most common sailboat keel types? The most common sailboat keel types are full-length keels, fin keels, bulb keels, wing keels, bilge keels, and lifting keels. Full keels are popular among cruisers, while fin keels are generally used for racing. Bilge keels and lifting keels are typically used in tidal waters, on small fishing boats for example.

In this article, we'll explore the most common keel types together. I'll use diagrams to really hit home the differences of all these keel types, and we'll discuss what keel types are best for liveaboard, ocean cruising, and lake weekend trips. After reading this article, you'll know what to choose - and why.

Sailboat Keels Explained

On this page:, overview of sailboat keel types, keel types: fundamentals, modified full keel, centerboard.

If you just want a quick overview, here's a list with the most common keel types and a short description. More detail will follow below.

The most common keel types

• Full keels run from front to aft and are the most stable keel type, making them the most popular cruising keel.
• Fin keels offer the best performance but are less comfortable. This makes them popular for racing. Fin keels are bolted on to the hull and generally run deep and thin.
• Bulb and wing keels are both variants on the fin keel.
• Bulb keels carry additional ballast in the tip, making them more stable.
• Wing keels have two tips at the end of the keel, which reduces crossflow, improving directional stability.
• Bilge keels are double fin or double full kees, which allows the boat to be beached, making them the most popular keel for tidal waters.
• Lifting keels are moveable keels that can be lowered and raised, allowing the boat to enter shallow waters as well.
• Centerboard keels are a pivoting lifting keel, allowing to sail both coastal and inland waters.
• Leeboards are fins on the sides of flat-bottomed hulls boats, making a keel unnecessary.

Properties of each keel type

What does a keel do?

What does the keel do? A keel is a vertical blade running down from the hull. It is weighted and acts as a ballast, countering the boat's tendency to heel and preventing it from tipping over. The wetted surface under the waterline reduces slippage to leeward by creating a track, which counters the sideway force of the wind on the sails.

The reason sailboats don't tip over is that the weight of the keel counters the buoyancy of the hull, which means it will pull the boat downward. This downward force reduces heel and prevents the boat from rolling.

A canoe doesn't have a keel. Try stepping into that: it will want to roll.

It counters the horizontal force the wind puts on the sails. Whenever the force on the sails increases, the resistance of the water on the keel increases proportionally.

The heavier the keel, the less heel you'll get.

A keel reduces slippage to leeward. Slippage is simply the amount you fall off course because of the direction of the wind and current. Leeward is the side of the boat behind the wind.

So if you don't have a keel, you will fall off course quite a lot because the wind will push you over the water surface.

You will also heel quite a lot since there is nothing beneath the water surface to counter the force of the wind high up in your sails.

A keel fixes both of these issues and makes sailboats one of the most reliable boats in heavy winds and storms.

You can read on about how keels work here.

Keels can be classified by multiple dimensions. You can look at them from the side or the front. You can also classify them based on properties.

Before I dive into each keel type in-depth and show examples, let's make sure we have the same starting point.

There are essentially two sorts of keels:

Fixed keels

Movable keels.

Fixed keels are keels that are integrated into the hull or bolted on. They can't be moved or lifted.

When looking at fixed keels, you can divide them up further based on the side view. There are three main categories:

Bilge keels

Full keels are more comfortable, provide better stability and protection, but are also slower than fin keels.

Fin keels are less comfortable, provide less stability, are more vulnerable, but they're also a lot faster than full keels.

Bilge keels are double keels: one on each side of the hull. This allows them to be beached, which comes in handy in tidal waters. They are generally a lot slower and less maneuverable compared to fin keels.

Movable keels can be lifted from the water, creating a shoal (shallow) draft, allowing the boat to enter both shallow waters and coastal waters. This makes it a very versatile keel type. There are two main designs:

Lifting keels

Lifting keels can be lowered and raised through a slit in the hull. Examples of lifting keels are the daggerboard and centerboard.

Leeboards are wooden swords attached to the side of the hull and prevent slippage to leeward, but they don't stabilize the boat, nor counter heel by adding ballast.

With fin keels, there are different tip designs available. The most common two tip designs are:

These are both variants of the fin keel. Generally, these keel designs are mentioned in one breath with full keels and fin keels, creating confusion on what kind of keel they are. But it's important to understand that they are a sub-category of fin keels.

Rudder design

As with the tip of the fin, there are different rudder designs that may apply to both fin and full keels. The two most common rudder designs are:

Skeg rudder

Spade rudder.

A skeg is a structural part of the keel in front of the rudder that protects the rudder. The keel encompasses the rudder, preventing any rogue ropes, weeds, or rocks from damaging the rudder.

A spade rudder is an unprotected rudder: it doesn't have any structural protection from the keel design. It is simply attached to the hull. This design is very common.

Alright, we understand the big picture. Let's dive into more detail for each keel type and discuss the pros and cons.

Fixed keel Good for cruising and liveaboards Comfortable

What is a full keel? A full keel runs from front to aft for at least 50% of the hull and is fully integrated into the hull. It has the largest wetted surface of any keel type, and it is also the heaviest. This results in directional stability and reduced heeling, providing the most comfortable ride, but also the slowest.

The wetted surface simply means the amount of water contact area. With such a large wetted surface, it decreases slippage to leeward the most of all keel types, while it counters heeling the most as well.

The full keel is the most comfortable and stable keel type available. However, comfort comes at a price. It delivers the worst performance due to this large wetted area. It is the slowest of the keel types, and it has the worst windward performance.

This makes full keels particularly great for longtime cruisers or liveaboards who prefer comfort over speed, but less ideal for daysailers who need to navigate in and out of slips regularly.

Since it runs for at least 50% of the hull, it doesn't need to run as deep as a fin keel, resulting in a more shoal draft.

Heavier keels result in increased displacement, so a full keel boat will need a larger sail area to compensate for its weight.

For a more detailed discussion on full keel advantages, I recommend reading William's excellent article 5 Surprising Advantages of a Full Keel Sailboat here.

Example sailboats with a full keel:

• Nicholson 22
• Island Packet 380
• Beneteau Oceanis 411 Clipper
• Beneteau First 50
• Jeanneau Sun Shine 38
• Dufour 455 Grand Large

There are a lot of great cruising boats with full keel designs , some of them considered classics.

Full Keel with skeg rudder

Full keels with a skeg rudder design have a protected rudder, thanks to putting a structural part of the keel directly in front of the rudder. This helps with fending off any hazards to the rudder, like floating pieces of rope, rocks, or garbage, and protects it in case of running aground. The skeg design ensures the rudder is nearly impossible to break off.

Fixed keel Good for cruising and liveaboards Faster than a regular full keel

What is a modified full keel? A modified full keel is a full keel with a cutout at the front, reducing the wetted surface slightly, which increases performance without sacrificing too much comfort and stability. After the full keel, it has the best directional stability and the least amount of heel.

The modified full keel is popular among (bluewater) cruisers, thanks to its increased handling and performance. Most modified full keels have a skeg rudder, ensuring it is well-protected.

The slightly reduced weight and wetted surface improve windward performance quite a lot, but it is still one of the most stable keel designs out there.

Example sailboats with a modified full keel:

• Hallberg-Rassy HR 40
• Dufour Arpege 30
• Beneteau Oceanis Clipper 281
• Jeanneau Sun Odyssey 37.2

Fixed keel Good for racing Fast

What is a fin keel? A fin keel is a long, weighted blade attached to the bottom of the hull. It is lighter, faster, and more maneuverable than a full keel, but also more vulnerable. The increased distance between ballast and sails provides a lever, reducing the need for a large wetted surface or additional ballast.

Fin keels are generally bolted onto the hull and run deeper and thinner than a full keel. They are also lighter. This helps increasing performance (a lot), making fin keels a lot faster in all situations.

There are some major disadvantages to fin keels, however. Fin keels are a lot less comfortable than full keels and allow for more heel and a less solid track, so less directional stability. Fin keels are also a lot more vulnerable than full keels. They can break off when running aground, or get damaged.

They are very popular among racers and perform better when maneuvering in tight spots, like getting in and out of slips.

Example sailboats with a fin keel:

• Catalina 30
• Jeanneau Sun Odyssey 36.2

Fin keel with skeg rudder

Fin keels with a skeg rudder use a small structural part in front of the rudder to protect it. This design is mostly integrated into the hull, making it less vulnerable, and a great compromise between speed and safety.

Fin keel with spade rudder

Fin keels with a spade rudder have a completely exposed rudder, and typically a fin that is simply bolted on. The keel isn't integrated into the hull, making it more vulnerable and less comfortable.

Fin keel variant Good for cruising Less crossflow

What is a wing keel? A wing keel is a fin keel with a horizontal foil at the tip, which is wing-shaped and generally weighted. Its shape reduces crossflow, improving directional stability, and its ballast decreases heel, resulting in a more comfortable ride. The addition of a wingtip allows for a shorter fin, reducing draft.

Wing keels are good for cruising since this design improves directional stability compared to a regular fin keel or a bulb keel.

We'll discuss the wing keel's advantages and disadvantages in more detail in this article.

Fin keel variant Good for cruising Stability

What is a bulb keel? A bulb keel is a high-aspect-ratio fin keel with additional ballast at the end, which generally has a bulb or teardrop shape. This ballast improves stability and utilizes the distance between force and counterforce as a lever. This design reduces the need for a deep fin, resulting in a shoal draft.

By placing the weight at the largest possible distance from the force on the sails, you need relatively little extra weight for the same reduction in heel, making bulb keels very effective for cruising.

This design reduces the wetted area while increasing the weight of the keel just slightly, which increases sailing comfort big time.

Example sailboats with a bulb keel:

• Bavaria B/One
• Beneteau First 24

Fixed keel Good for racing Can be beached

What is a bilge keel? A bilge keel is a twin keel which uses double fins, allowing the boat to be beached and rest on its keel upright. Bilge keels have double the wetted surface, which increases comfort and directional stability while decreasing heel. Modern bilge keels often provide decent windward performance, thanks to better design.

The bilge keel does sacrifice speed compared to the fin keel but doesn't necessarily offer worse performance overall. Older designs performed considerably worse than other keels and were especially slow.

Bilge keels have some major advantages over full keels and fin keels. The most important is that the boat can be beached, making it a popular design in tidal waters. Bilge keels are especially common along the British coastline, where fishermen keep their boats in tidal harbors.

Another major advantage is that the boat can be stored resting on its keels, making dry storage and maintenance a lot easier.

Of course, there are many more pros and cons to the bilge keel , which we go into here.

Example sailboats with a bilge keel:

• Dufour Dynamique 62
• Hunter Duette
• Patagonia Patago 39
• Macwester 27

Lifting keel Good for daysailers Versatile

What is a centerboard? A centerboard is a type of retractable keel that rests on a hinge and can be lowered through a slot in the hull. It folds out like a pocket knife and allows you to increase or reduce the draft of the boat. Centerboards are mostly used on small fishing boats.

The centerboard is a very versatile keel type, allowing you to have both a very shoal draft for inland waters, as well as steadying the boat and reducing heel for larger bodies of water, or even oceans.

I've sailed a Cornish Crabber with a centerboard for a week, and while we stayed inland, having the option to increase the keel depth really came in handy when crossing the IJsselmeer (a former sea in The Netherlands).

There's more to the center

Olaf Roethele

https://www.theyachtmarket.com/en/new-boats/cornish-crabbers/adventure-17/218/

My name is Olaf and I am the owner of a Cornish Crabber 17 Adventure boat.

I would like to ask you if you can imagine to install on this boat a Torqeedo 2.0 Pod motor? Therefore i guess a modification of the keel/skeg is necessary ?!

Best regards from Uruguay,

You completely missed the hybrid planing/water-ballast keel of the Macgregor range

Thanks a lot for this explanation

Roger Bannon

Very well written article which provides an excellent guide for us small wooden boat builders. Thanks.

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Types of Sailboats: Essential Guide for Every Sailor

Sailboats have been an essential part of human history, contributing to exploration, trade, and leisure. With a myriad of designs and sizes, these versatile vessels cater to various purposes and preferences. The defining characteristics of sailboats come from their rigging, sails, and hull design.

The basics of sailboat design play a significant role in the classification and function of these vessels. Hull shapes, keel types, and construction materials contribute to the speed, stability, and maneuverability of sailboats. Additionally, rigging and sails come in various shapes and sizes, which influence sailing performance and handling.

Key Takeaways

• Sailboats are classified by hull design, rigging, and sails that serve specific purposes.
• Designs and materials have a direct impact on the performance and handling of sailboats.
• A wide range of sailboat types exists, which cater to different needs and preferences.

Basics of Sailboat Design

Sailboats come in various shapes and sizes, designed for different purposes and sailing conditions. One can classify sailboats based on hull types, keel types, and mast configurations. This section will briefly discuss these basic components of sailboat design.

There are mainly two types of hulls: monohull and multihull.

• Monohull : This is the traditional and most common type of sailboat hull. It consists of a single hull, providing stability through the use of a keel or centerboard. Monohulls come in various shapes and sizes, suitable for various sailing conditions.
• Catamaran : Catamarans have two parallel hulls of equal size, offering increased stability and speed compared to monohulls. They are commonly used for cruising and racing.
• Trimaran : Trimarans have three hulls, with a larger central hull and two smaller outrigger hulls. This design offers even more stability and speed than catamarans.

The keel is an essential component in sailboat design, helping with stability and performance. There are various keel types, including:

• Full keel : This traditional design features a long and wide keel that extends along the boat's bottom. It offers good tracking and stability but sacrifices speed and maneuverability.
• Fin keel : Fin keels are shorter and deeper than full keels, providing a better combination of stability and maneuverability. These are common in modern monohull sailboats.
• Bulb keel : A bulb keel features a fin keel with a heavy bulb at the bottom, which concentrates the boat's weight, increasing stability and performance in rough conditions.
• Swing keel or centerboard : Swing keels and centerboards can be raised or lowered, allowing the boat to adapt to different water depths and sailing conditions. They are common in smaller boats and racing sailboats.

Mast Configuration

The mast configuration affects the sail plan and overall performance of a sailboat. Some common mast configurations include:

• Sloop : This is the most popular mast configuration and features a single mast with a mainsail and a headsail. The simple design makes it easy to handle and suitable for various sailing conditions.
• Cutter : Similar to the sloop, the cutter also has a single mast but carries two headsails, providing more sail area and better performance in heavy weather.
• Ketch : A ketch configuration has two masts: a taller main mast and a shorter mizzen mast. This design offers more flexibility in sail combinations and better balance in different sailing conditions.
• Yawl : Similar to a ketch, a yawl also features two masts but the mizzen is located further aft and is smaller. This design provides better balance and control, particularly in downwind sailing scenarios.

In conclusion, the basics of sailboat design involve selecting the appropriate hull type, keel type, and mast configuration for the desired sailing performance and conditions. Understanding these concepts can help sailors make informed decisions when choosing a sailboat or planning their sailing adventures.

Rigging and Sails

When it comes to sailboats, the rigging and sails play a crucial role in the boat's overall performance and capabilities. This section will briefly cover popular rig types and sail types seen on different sailboats.

There are several types of rigs commonly found on sailboats:

• Sloop : Sloops are the most common type of rig found on modern sailboats. They have a single mast with a mainsail and a single headsail, typically a genoa or jib.
• Ketch : Ketches have two masts, with the main mast taller than the mizzen mast situated aft. They carry a mainsail on the main mast and a mizzen sail on the mizzen mast. Ketches benefit from easier handling and reduced sail area under strong winds.
• Yawl : Similar to ketches, yawls have two masts, but the mizzen mast is smaller and sits further aft, behind the rudder post. Yawls are often chosen for their graceful appearance and improved balance.
• Schooner : Schooners have two or more masts, with the aft mast(s) typically taller than the forward mast(s). Schooners can handle more sails, offering increased sail area for better performance, especially downwind.
• Catboat : Catboats are single-masted sailboats with a single, large mainsail and no headsails. They have a wide beam, which provides stability and ample space for passengers.
• Cutter : Cutters are similar to sloops but carry two headsails, usually a jib and staysail. Cutters may have multiple headsails for increased versatility in various wind conditions.

In addition to the types of rigs, there are also several types of sails used on sailboats, including:

• Mainsail : The primary sail attached to the back of the main mast. It is typically raised on a track or luff groove and managed by a combination of halyard, sheet, and boom vang.
• Genoa : A large triangular sail that overlaps the mainsail, typically used in light winds to provide additional surface area for better performance.
• Jib : A smaller, non-overlapping triangular sail attached to the forestay. Jibs are easier to manage than genoas and are used in a variety of wind conditions.
• Spinnaker : A large, lightweight sail used primarily for downwind sailing . Spinnakers are often brightly colored and shaped like a parachute to catch wind efficiently.
• Staysail : A smaller sail typically used in cutter rigs, positioned between the main mast and the forestay. Staysails provide additional sail area and versatility in varied wind conditions.

Understanding the relationship between sail and rigging can help sailors optimize the performance of their sailboats. With various options for rig types and sail types, each sailboat can be configured to meet the unique needs of its skipper and crew.

Classes and Types of Sailboats

Monohulls are the most common type of sailboats, consisting of a single hull that provides stability and balance. They come in various sizes and designs, depending on their intended use. Some popular monohull sailboats include the Optimist , Finn, and Sunfish, which are frequently used for racing and recreational sailing. Monohulls tend to have a deeper draft, requiring more water depth than their multi-hull counterparts.

Multihulls, also known as multi-hull sailboats, are a more modern innovation in sailing. They feature two or more hulls connected by a frame or bridgedeck. This design offers increased stability and speed over monohulls. Some common types of multihulls are catamarans (with two hulls) and trimarans (with three hulls). Due to their wider beam and shallower draft, multihulls are particularly suitable for cruising in shallow waters and provide more living space on board.

One-Design Sailboats

One-Design sailboats are a specific class of racing sailboats in which all boats are built to the same design specifications, ensuring that the competition focuses on the skill of the sailor rather than the design of the boat. These boats must adhere to strict rules and standards, with minimal variations allowed in terms of hull shape, sail area, and rigging. Some popular one-design sailboats include the Enterprise and the aforementioned Optimist and Finn sailboats.

Dinghies and Skiffs

Dinghies and skiffs are small, lightweight sailboats that are often used for sailing classes, short-distance racing, or as tenders to larger boats. Dinghies usually have a single mast with a mainsail and sometimes a small jib. Some popular types of sailing dinghies include the Optimist, which is specifically designed for children, and the versatile Sunfish sailboat. Skiffs, on the other hand, are high-performance sailboats primarily used for racing. They have a larger sail area relative to their size and typically include features such as trapezes and planing hulls, which allow for faster speeds and greater maneuverability.

In conclusion, there are various classes and types of sailboats, each with its own unique features and characteristics. From the simplicity of monohulls to the stability and speed of multihulls, and from the fair competition of one-design sailboats to the excitement of dinghies and skiffs, there is a sailboat to satisfy every sailor's preferences.

Sailboat Size and Use

When exploring the world of sailboats, it's important to understand their different sizes and purposes. Sailboats can be categorized into three main types, each with unique characteristics and uses: Day Sailers , Racing Sailboats, and Cruising Sailboats .

Day Sailers

Day Sailers are small sailboats typically ranging from 10 to 24 feet in length. These boats are perfect for short sailing trips and are easy to maneuver for beginners. They have limited accommodations on board, providing just enough seats for a small group of people. Some popular day sailer models include the Laser, Sunfish, and Flying Scot. Lightweight and agile, Day Sailers are often used for:

• Recreation: casual sailing or exploring nearby waters with family and friends
• Training: beginner sailing lessons or practicing sailing techniques
• Competition: local club races or interclub regattas

Racing Sailboats

Racing Sailboats are designed to provide maximum speed, maneuverability, and efficiency on the water. Sizes may vary greatly, from small dinghies to large yachts. Key features of racing sailboats include a sleek hull shape, high-performance sails, and minimalistic interiors to reduce weight.

Career racers and sailing enthusiasts alike participate in various types of racing events , such as:

• One-design racing: all boats have identical specifications, emphasizing crew skill
• Handicap racing: boats of different sizes and designs compete with time adjustments
• Offshore racing: long-distance racing from one point to another, often around islands or across oceans

Cruising Sailboats

Cruising Sailboats are designed for longer journeys and extended stays on the water. They typically range from 25 to 70 feet in length and provide comfortable accommodations such as sleeping cabins, a galley, and storage spaces for supplies and equipment. Sailing cruisers prioritize stability, comfort, and durability for their voyage.

Here are some common types of cruising sailboats:

• Cruiser-racers: These boats combine the speed of a racing sailboat with the comfort and amenities of a cruising sailboat. They are ideal for families or sailors who enjoy participating in racing events while still having the option for leisurely cruises.
• Bluewater cruisers: Designed for handling the world's most demanding ocean conditions, bluewater cruisers are built with a focus on sturdy, self-reliant sailboats that can withstand long-distance voyages and challenging weather conditions.
• Multihulls: Catamarans and trimarans are gaining popularity in the cruising world for their typically more spacious interiors and level sailing characteristics. With two or three hulls, multihulls offer high levels of stability and speed for a comfortable cruising experience.

Understanding the differences between various sailboat types will help potential sailors select the perfect vessel for their sailing goals, skills, and preferences. Day Sailers, Racing Sailboats, and Cruising Sailboats each have their unique features, catering to distinct uses and sailing experiences.

Advanced Sailboat Features

Sailboats have evolved over time, and many advanced features have been developed to enhance performance and safety. In this section, we will discuss some of the key advanced features in modern sailboats, focusing on performance enhancements and safety/navigation.

Performance Enhancements

One critical component that impacts a sailboat's performance is the type of keel it has, which affects stability, resistance, and maneuverability . There are several kinds of keels such as fin keel , wing keel , and bulb keel . Fin keels offer low drag and high efficiency, making them suitable for racing sailboats. On the other hand, wing keels provide better stability at low speeds, while bulb keels provide a lower center of gravity to enhance overall stability and comfort during long voyages.

Another feature that contributes to a sailboat's performance is its sails and rigging. The jib is a triangular sail at the front of the boat, which helps improve its upwind performance. More advanced sailboats use a combination of shrouds , which are the supporting cables running along the sides of the boat, and stays , the cables that help hold the mast in place, to create a stable and efficient rigging system.

A sailboat's performance can also be influenced by the presence of a centerboard or daggerboard , which can be adjusted to optimize stability, maneuverability, and speed. When racing or navigating in shallow waters, retractable centerboards and daggerboards are particularly useful as they provide better performance and versatility.

Safety and Navigation

Safety and navigation onboard a sailboat relies on a combination of advanced gear and equipment. A modern sailboat is usually equipped with:

• GPS and chartplotters to assist with navigation and planning routes
• VHF radios for communication with other vessels and authorities
• Radar to detect obstacles, weather systems, and other vessels
• AIS (Automatic Identification System) which helps monitor nearby vessel traffic

The design of a sailboat's hull, rigging, sails, and hardware also contribute to its safety. The boom , the horizontal pole that extends the sail, should be properly secured and designed to avoid accidents while sailing. The keel , whether it's a fin, wing, or bulb keel, plays a vital role in the overall stability and safety of the sailboat. The choice of keel should be based on the intended use of the sailboat and the prevailing sailing conditions.

In summary, advanced sailboat features significantly improve the performance, safety, and navigation capabilities of modern sailboats. Innovations in keel design, rigging systems, and onboard navigational equipment have undoubtedly contributed to the overall enjoyment and safety of sailing.

Sailboat Ownership

Buying Considerations

When considering buying a sailboat , it is important to understand the different types of sailboats available and the purpose each serves. Sailboats can be broadly categorized into three types:

• Racing sailboats: Designed for speed and performance, with minimalistic interiors and advanced sail systems.
• Cruising sailboats: Built for comfort and longer trips, featuring more spacious interiors and amenities.
• Daysailers: Smaller, easy-to-handle boats that are often used for short trips and recreational sailing.

Prospective boat owners should consider factors such as boat size, type, budget, and intended use (solo vs. family sailing, charter operations, etc.). It's also essential to evaluate the availability of necessary gear and the level of experience required to handle the chosen sailboat.

Maintenance and Upkeep

Sailboat ownership involves maintenance and upkeep to ensure the boat remains functional, safe, and holds its value. Some common maintenance tasks include:

• Hull cleaning and inspection: Regularly inspect the hull for damages and clean off any growth to maintain performance and fuel efficiency.
• Antifouling paint: Apply antifouling paint to prevent marine organisms from attaching to the hull, which can negatively impact the boat's performance.
• Engine maintenance: Check and replace engine oil, inspect cooling and fuel systems, and clean or replace air filters.

In addition to regular maintenance, sailboat owners should also be prepared to replace or repair critical systems and components, such as:

• Sails: Monitor the condition of your sails and replace them as needed to maintain performance and safety.
• Rigging: Regularly inspect and maintain the standing and running rigging, and replace worn or compromised parts.
• Electronics and instruments: Ensure navigation systems, radios, and other electronic equipment are functioning properly.

Taking proper care of a sailboat can be time-consuming, and some owners may choose to charter their boats when not in use as a way to offset ownership costs. Others may opt for hiring professionals to manage routine maintenance, particularly when sailing solo or with limited sailing experience.

Historical and Special Sailboats

Tall ships and gaffers.

Tall Ships are large, traditionally rigged sailing vessels with multiple masts, typically square-rigged on at least one of their masts. Some examples of these ships include the clipper, brig, and square-rigged vessels. The clipper is a fast sailing ship known for its sleek hull and large sail area, while the brig features two square-rigged masts. Square-rigged ships were known for their impressive sail area and could cover large distances quickly.

Gaffers are a subset of historical sailing vessels with a gaff mainsail as their primary sail type. This gaff-rig is characterized by a spar (pole) that extends the top edge of the mainsail, giving it a quadrilateral shape to optimize wind coverage. Gaff mainsails were commonly used in England and influenced the development of other sailing vessels.

Classic and Antique Sailboats

Classic and antique sailboats refer to older, traditionally designed sailing vessels that have been preserved or restored. They often feature wooden construction and showcase a variety of rigging types, including gaff rigs and square rigs. These historical sailboats have unique designs, materials, and techniques that have since evolved or become rare.

Here are some examples of antique and classic sailboats:

• Sloop : A single-masted sailboat with a Bermuda rig and foresail
• Cutter : A single-masted vessel with a similar rig to the sloop, but with additional headsails for increased maneuverability
• Ketch : A two-masted sailboat with a smaller mizzen mast aft of the main mast

In summary, historical and special sailboats encompass a wide range of vessel types, from large, multi-masted tall ships to smaller, single-masted gaffers and classic sailboats. These vessels reflect the rich maritime history and the evolution of sailing techniques and designs over time.

Sailboat Culture and Lifestyle

Sailboat culture and lifestyle encompass a variety of aspects including racing events, leisurely cruising, and exploring new destinations. The main types of sailboats include racing yachts, cruising sailboats, and motorsailers, each offering a unique experience for sailors.

Regattas and Racing Circuits

A popular aspect of sailboat culture involves participating in regattas and racing circuits . These events create a competitive atmosphere and develop camaraderie among sailors. Racing sailboats are specifically designed for speed and agility , and sailors often team up to compete in prestigious races such as the Rolex Sydney Hobart Yacht Race or the America's Cup. Yacht clubs play an essential role in cultivating this competitive sailing environment.

Sailboat Charter and Tourism

Another facet of sailing culture is the sailboat charter and tourism industry, which allows people to experience the cruising lifestyle without owning a sailboat. Charters are offered for various types of sailboats, from family-sized cruising vessels to luxurious superyachts . Yacht sailing provides tourists with a unique travel experience, as they can explore diverse destinations, immerse themselves in local cultures, or simply relax on the open water.

Cruising sailboats are designed to provide comfortable living spaces and amenities, making them perfect for longer journeys or exploring remote destinations. Motorsailers, on the other hand, are equipped with both sails and engines, offering versatility and convenience for sailors.

Some popular sailing destinations include the Caribbean, Mediterranean Sea, and the South Pacific. These regions offer beautiful scenery, rich cultural experiences, and ideal sailing conditions.

The sailboat culture and lifestyle attract individuals who enjoy adventure, exploration, and camaraderie. From competitive racing events to leisurely cruising vacations, sailing offers diverse experiences that cater to a wide range of interests.

Frequently Asked Questions

What are the distinguishing features of different sailboat classes?

There are various sailboat classes, each with its own distinguishing features. Monohulls, for example, are the most common type of sailboat and have a single hull. Multihulls, such as catamarans and trimarans, have two or three hulls, respectively. These differences in hull design often affect the boat's stability, speed, and maneuverability.

Which sailboat types are best for novice sailors?

Novice sailors often benefit from starting with smaller, more manageable boats. Sailing dinghies and daysailers are popular choices due to their simple rigging and ease of handling. These boats typically have a single mast and a limited number of sails, making them ideal for beginners to learn sailing basics.

What are common types of small sailboats ideal for day sailing?

For day sailing, small sailboats such as sailing dinghies, day sailers, and pocket cruisers are ideal options. These boats usually range between 12 and 25 feet in length and offer simplicity, ease of handling, and portability. Examples of common day sailing boats include the Sunfish, Laser, and O'Day Mariner.

How do the purposes of various sailboat types vary?

Sailboats serve different purposes based on their design, size, and features. Daysailers and dinghies are ideal for short trips, sailing lessons, and casual outings. Racing sailboats, with their lighter weight and streamlined design, are built for speed and competition. Cruising sailboats, on the other hand, are designed for longer voyages and often include living quarters and additional amenities for comfortable onboard living.

What is considered the most popular class of sailboat for recreational use?

The most popular class of sailboat for recreational use often varies depending on individual preferences and local conditions. However, monohulls are commonly preferred due to their widespread availability, versatility, and affordability. Within the monohull class, boats like the Sunfish, Laser, and Catalina 22 are popular choices for their ease of use and adaptability to various sailing conditions.

Could you describe a sailing dinghy designed for two people?

A two-person sailing dinghy typically has a simple rig with a single mast and one or more sails, making it easy to handle for both experienced and novice sailors. The RS Venture , for example, is a popular choice for two-person sailing. It features a spacious cockpit, durable construction, and simplicity in its rigging and control systems. These characteristics make it an excellent option for recreational sailing, training, and even racing.

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Boats come in a wide variety of shapes and sizes—and so do their hulls. Despite the variety, all hulls are designed to do one of only two things: either displace water, or ride on top of it, which is called planing. Sailing boats, slow-moving boats, and large boats like cruise ships have displacement hulls. The combination of their weight and power means they move lower in the water, pushing or displacing water, rather than riding on top of it. Smaller, faster boats, like powerboats or personal watercraft, typically have planing hulls. Planing hulls are designed to rise up and ride on top of the water at higher speeds. Now let's look at some specific hull types.

There are four common types of boat hulls.

Flat-Bottom Hulls

Boats with "flat-bottomed" hulls are very stable, great for fishing and other uses on calm, small bodies of water.

Round-Bottom Hulls

"Round-bottomed" hulls are typically displacement hulls, and are designed to move smoothly through the water with little effort. An example of a round-bottomed hull is that found on a canoe. One drawback to the round-bottomed design is that it's less stable in the water and can capsize more easily. So, extra care needs to be taken when entering, exiting and loading these types of boats.

V-Shaped Hulls

"V-shaped" hulls are planing hulls, and are the most common type of hull for powerboats. Deep v-shaped boats are designed to plane on top of the water at higher speeds and provide a smoother ride through choppy water. These boats are usually equipped with a larger engine than flat or round-bottomed boats.

Multi-Hulled

Finally, let's look at "multi-hulled" boats. These boats can have either planing or displacement hulls depending on the shape of hull and size of engine. Multi-hulled boats are some of the most stable on the water. They also require more room to steer and turn. Examples of common multi-hulled boats are catamarans and pontoon boats .

Boat Terminology

Boat Engine Types

Types of Sailboats, Activities and Uses

Sailboats may be boats with sails, but they’re not one homogenous category. Sailboat types differentiate by design and use, and even the type of culture that permeates each subgroup. Let’s divide sailboats by hull types, rig types and activities/uses.

Explore Sailboat Brands

Sailboat Hull Types

Sailboats ride on different hulls, which differ in the total number of hulls and their shape. The basic three hull types include:

• Monohulls (one hull)
• Catamarans (two hulls)
• Trimarans (three hulls)

Monohulls have one hull but that doesn’t make them all the same. Traditional monohulls may have full keels (heavy encapsulated ballast that runs along the bottom of the hull), cutaway keels (similar to full but the forefoot is cutaway allowing the boat greater maneuverability in tight quarters) or bolted on fin keels that may have a bulb at the bottom for extra ballast to keep the vessel stable.

Monohulls can also have a swing keel, daggerboard or centerboard that retracts up into an appendage in the hull itself. With the keel or board up, the boat can enter shallow water and can travel faster downwind. With the keel down, the vessel tracks better upwind.

Small monohulls like sailing dinghies, may also have shallow planing hulls that can surf off a wave. Finally, monohulls can also foil on appendages (usually made of carbon fiber) with the actual hull out of the water when a minimum speed is reached.

Catamarans (often nicknamed "cats") have two hulls with a deck or trampoline in between. Large cats (35 feet and over) have become popular in charter use because they offer more interior and deck space and an easier motion to induce less seasickness. Small catamarans usually have just a trampoline in between the hulls and make fun daysailers.

Because catamarans don’t have deep and heavy keels, they tend to sail faster off the wind. Foiling catamarans were made popular by the America’s Cup races and are proliferating into general cruising use.

Trimarans have three hulls: a main hull and two amas (side hulls used for stability). On some trimarans, the arms that hold the amas can fold inward, making the trimaran narrower and in some cases trailerable. Large cruising trimaranas are gaining popularity because they are stable and fast sailers.

Sailboat Rig Types

Sailboat rigging includes:

• the mast(s);
• and the shrouds or stays that hold up the mast.

A sailboat with one mast is usually a sloop with one mainsail and one headsail.

A cutter rig usually has one mast but two or more headsails. This rig “cuts” the foretriangle between the head (forward) stay and the main mast. Multiple headsails allow for flexible sail combinations in variable wind conditions.

Ketches and yawls have a secondary mast behind the main one. The ketch configuration places that mizzenmast behind the mainmast but ahead of the rudderpost while the yawl places it behind the post. The second mast is shorter than the main mast. Both of these designs (split rigs) provide more sail area that isn’t reliant solely on the height of the mainmast and therefore can be easier to manage when sailing shorthanded.

Schooners also have multiple masts—two or more. However, the foremost mast is shorter than the main mast. Tall ship rigging is in its own category and can get quite complex.

Sailboat Types by Primary Use

You can do many of the same things on all sailboats, but some types are more specialized.

Sailing dinghies: Small boats usually sailed by one or two people, sailing dinghies are often used to teach new sailors. That said, experts on high tech sailing dinghies compete in athletic racing up to Olympic level.

Day cruisers: Although any sailboat can be cruised for a day, day cruisers are often boats shorter than 30 feet that are designed to be sailed for an afternoon. They’re usually more Spartan in their outfitting and may or may not have a cabin with amenities.

Sailing cruisers: These sailboats can be monohulls or multihulls and are designed to cruise for weekends or longer. They usually have a berth (bed), a head (toilet) and a galley (kitchen). They can be sloop, cutter, ketch, yawl or schooner-rigged and vary in length (from 25-85 feet). Larger sailboats tend to fall into the crewed superyacht category.

Racing sailboats: Most offshore racers are larger boats crewed by multiple individuals while smaller racers can be single or double-handed. Racing boats are usually built lighter, have fin keels and laminate performance sails.

Racer/cruisers: These designs try to straddle the two above. They’re usually more lightly built cruisers with full amenities so they can be weekended. Some people will argue that these boats are a compromise for owners who want to primarily cruise but also race.

Bluewater cruising sailboats: These boats are designed to cross oceans or sail “blue waters.” They’re typically heavier in build with a stout rig and are fully equipped for extended offshore use.

Motorsailers: This term has fallen out of favor since it’s often pejorative. These sailboats may rely on the engine to sail in light wind conditions, especially due to their excessive weight.

Antique/classic sailboats: These are usually older restored vessels. They may be built of wood and have classic yawl rigs. These sailboats are often showcased in special events.

Sailboats occupy multiple segments and experienced sailors learn the finer points of design and use. Then, they never see two sailboats the same way again.

Read Next: Buying a Sailboat: Factors to Consider

You Might Also Like:

• Why Sailing?
• Learning the Basics of Sailing
• Sailing Basics: 10 Nautical and Sailing Terms to Know
• Explore Sailboat Brands & Manufacturers

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11 Types Of Boat Hulls – Boat Hull Shapes & Designs

In many ways, the hull is the most important part of the boat because it’s what helps it float, pun intended. It’s the waterproof ‘base’ of the boat, with part of it submerged under the waterline. And these hulls come in lots of different styles and designs. Let’s check out a few.

Table of Contents

Overview of Boat Hull Types

A comprehensive list of boat hull types, bonus: jet ski hulls, quick clues about boat hull types.

First off, let’s look at the broad hull divisions . They can be categorized by:

• Form e.g. hard chine, soft chine, smooth chine
• Displacement e.g. full displacement, planing, semi
• Shape e.g. s-bottom, v-bottom, rounded, flat

These categories overlap a lot. For example, a v-bottom hull is sometimes described as a (hard) chined hull. And s-bottoms are sometimes labeled as rounded bilge hulls or smooth curve hulls. You can also classify hull types based on the number of hulls under the boat.

Just to make sure we’ve covered all the boat hull types, we’ve compiled them into a single list that cuts across the categories. This list will expand on any overlaps between the hull classes. Let’s start with the word chine, the angle at the bottom of the hull. It can be flat, curved, etc.

Hard chined hulls are sometimes called chined (without the word ‘hard’). And soft chined hulls are sometimes described as molded, curved, rounded, or smooth hulls. Finally, displacement hulls have a wider, heavier base designed to push water aside at lower speeds.

Conversely, planing hulls are streamlined to slice through the water at faster speeds. They ride high above the waves and seem to skim the water. Semi-planing / semi-displacement hulls fall in-between. Let’s look at the specific boat hull types, noting how they intermingle.

1. Flat-Bottom Hull (Chined)

Just to refresh your memory, the chine described the angle at the outer bottom of the boat. This can be flat, slightly curved, fully rounded, or sharp and acute (e.g. a distinct v-shape, which is the harshest angle and is therefore called a hard chine. Flat-bottoms have no angle.

This means they’re sturdy and stable, sitting low and moving slow. That flat surface does drag the boat though, so flat-bottom hulls often have a pointed bow and stern to push the water more effectively. Or they may have an angular front and a reversed bell-shape back.

Flat-bottom hulls are categorized as displacement hulls. They work well on calm waters, so flat-bottom hulls are mostly used inland on large lakes and secure bays. They don’t do as well in wavy water. Small rowboats, rafts, kayaks, and paddle boats often have flat-bottom hulls.

2. V-Bottom Hull (Chined)

While flat-bottom boats are often displacers, v-bottom boats are better at planing. That triangular base is where the hard-chine name comes from because it’s a sharp or ‘hard’ angle of 6° to 23°. This hard chine is good at cutting through currents and riding over the waves.

V-bottom hulls are routinely combined with a powerful motor , which makes it even easier to zip above the waves. While sailing, the nose of the boat stays visible above the waterline. These boats aren’t as stable at slow speeds because the rolling waves can topple the boat.

Think of it this way – the V provides a wider surface for strong waves to push against, so the boat has to be fast and powerful enough to counter that roiling motion. A V-bottom hull can have a single V or several smaller ones strategically arranged for maximized boat balance.

3. Multi-Chine Hull (Hard)

Multi-chined hulls can have twin or triplet chines. These chines can be parallel, identical, or have mixed sizes, and are ideal for speed sailing. The acute angles beneath the waterline help the boat soar over the water, while the multiple chines counter the effect of rolling waves.

But because there’s more than one hull, multi-chines are classed as displacement hulls. The hard chines push water into the valleys and ridges formed by the frames. Multi-chine hulls can be cathedral hulls or tunnel hulls, meaning the hull creates an M-shape under the water.

Multi-chine hulls will sometimes have a separate engine for each chine, so they can move quite fast. The platforms between the chines keep the boat stable while the alignment of the chines helps them battle the conflicting directions of circular waves and clashing currents.

4. Round Bilge Hull (Moulded)

This is the most popular boat hull type because it combines the stability of a flat hull with the maneuverability of a curved one. The rounded bottom of the boat lets it handle waves more effectively than a flat hull. The soft-chine lets the boat glide and bob over larger, faster waves.

The reason molded hulls are so common is their middle-ground status. The curved bottom offers more speed and less drag than flat-bottom hulls. But because rounded bilge hulls are broader than v-bottoms, these boats can handle rougher, deeper waters than flat-bottoms.

Cargo boats, cruise ships, and ferries tend to have rounded hulls, especially if they sail deep waters. They can gain speed but are intended for slow gliding. But they tend to be large so you need plenty of room to turn, and extra care when you’re loading the boat at the docks .

5. Semi-Round Hull (Moulded)

Semi-round bilge hulls are halfway between round hulls and S-hulls. They have a slightly gentler curve than S-bottoms, and they have a pointed keel down their middle. Small boats like dinghies and laser boats often have a semi-round hull, combining stability and speed.

Dinghies are generally used as non-inflatable lifeboats while lasers are for competitive solo sailing. They’re functional boats that can withstand deep, rough waters but are only intended for targeted spurts – like escaping a sinking ship or sprint sailing. They’re not distance boats.

You can also use semi-round hulls for buoy-sailing, where you race around designated ‘landmarks’ in the water. Semi-bilge boats do well here because they can work with flapping sails, go deeper with less drag, and retain stability during sharp turns and tricky maneuvers.

6. S-Bottom Hull (Moulded)

Sometimes called the arc-bottom hull, these boats have a smooth, curved bottom that meets at a pointed keel. The ‘s’ is the bulbous curve that forms from the waterline to the apex, and every boat has two. Think of it like a stereotypical temple dome roof that hangs upside-down.

This arch makes the boat an ideal hybrid. Its bulbous curves offer additional storage space and stability, while the pointy bit is great for planning since it lifts the boat as it slices through the waves. The curves also help to counter the push of rocking waves and currents.

Curiously, DIY boats routinely have that S-shape. These include the kinds of fishing boats that indigenous communities use. The arch creates space for your fishing haul while allowing you to sail swift rivers and deep lakes. Unfortunately, that arched keel is prone to capsizing.

7. Displacement Hull (Low-Speed)

Any boat that moves by pushing water out of the way is defined as a displacement boat. They mostly have flat or round hulls , but they can also have a multi-chine design if the hull has grooves between the chines. This crucial difference distinguishes how the boat operates.

Think of it this way – a V-bottom boat, even one with several chines, needs flatter sections to join the separate hulls. If the platforms are 180, they glide above the waterline with stronger drag. But if those underwater sections are angular, the boat displaces the water down there.

And yes, displacement boats can still zoom along. But when they do, the flatter sections slam onto the water as every wave dips. That makes for a rather uncomfortable ride, which is why displacement hulls are best for boats that intend to carry heavy cargo across calm, slow seas.

8. Planing Hull (High-Speed)

The opposite boat hull type is the planing hull, built for speed. You know that typical sailing shot where a suave spy seems to be bouncing on the waves in a pointed boat that’s apparently flying through the sea? That’s a planing boat, and the emphasis is on the boat’s lift or plane.

This means the hull is designed to carry more weight at the back, allowing the front to rise out of the water at high speeds . These boats are often equipped with high-powered motors , and if you drive too slowly, the angular hull will have a hard time idling in the water.

In such cases, the boat is likely to pitch. Here’s a shortcut you could use to remember the different boat hull types. Flat, rounded, and multi-hull boats are displacers. Arched, v-hull, and angular boats are planing boats. These features are combined for inflated hollow hulls.

9. Semi-Planing / Semi-Displacement Hull

Cruise ships and luxury yachts are the best examples of semi-planing or semi-displacement boats. The design range is quite diverse, so the specs will depend on your particular needs. But the idea is that the hull has a composite surface to facilitate the various sailing features.

For example, you need speed between destinations, and maneuverability as you dock at every port. Massive storage space is essential for the passengers, their gear, and their … by-products. You also want a boat that stays stable as it faces deep-sea currents and creatures.

The draft (that’s the section of the hull that stays submerged) has straight bits, angular bits, and curved bits to allow for all this. Ocean trawlers and container ships can also have a semi-planing hull. These semi boats have Vs and wedges at the front and get rounder at the stern .

10. Pontoon Hull (Hollow)

What happens when you want a ‘flat’ boat with a larger capacity? Well, aluminum fishing boats are flat-bottomed but tiny. So if you want to carry a larger crew (or even passengers in transit), opt for a pontoon hull. Its hull floats through the use of hollow cylindrical tubes.

These tubes are often made from aluminum, and your pontoon can have two or more tubes below its deck. The focus is on cargo space and balance. Passenger platoons have lots of padded seating space, and guests are carefully spread out to maintain the boat’s equilibrium.

Pontoon hulls are sometimes fitted on trawlers as well. Think of it as an industry-strength inflatable lifeboat, but with a solid, seaworthy frame. The seating area is centralized with raised sides and strategic guardrails. This helps the boat sit lower and safer inside the water.

11. Catamaran Hull (Multi-Chined)

While pontoons are built for slow freight, catamarans are built for speed. Both these boats have multi-chined hulls. But while the tubes on pontoons have a rounded bottom, the hard chines on catamarans are V-shaped and sometimes have sharper anglers for swifter sailing.

These boats have a massive footprint. But because of the shape and alignment of the hull, they don’t have as much storage space as pontoons. They also have to be carefully designed to ensure stability. This is why catamarans have large masts and sails to balance the boat.

The apparatus also helps you control the boat. Catamarans are preferred by seafarers who prize seamanship. Playing with those swirling ropes and heavy fabrics is both a science and an art, so catamarans are primarily used for competitive analog sailing on rough oceans.

Technically, jet skis or personal watercraft (PWCs) aren’t boats. But they use the same principles and are fitted with a V-bottom planing hull and a pressure jet engine. These jet ski hulls have extra parts to facilitate speed and stability as you ride the waves. They include:

• Chines – these angles can be soft or hard, but they’re always V-shaped.
• Strakes – smaller ridges that enhance the lift for smoother planing.
• Sponsons – side fins that help the jet ski balance better.
• Steps – ledges at the bottom of the hull to reduce drag.

PWCs rely on your balance and confidence. Their hulls are designed for maximum lift, sensational planing, dramatic turns, and extreme speed. The hull angle is sharper at the front than the back. It’s described as a modified V-hull, with all its extra edges and ledges.

With all these boat hull types available, it’s easy to get them mixed up! Here are some hints:

• Displacement hulls sit lower and move slower.
• Planing hulls sail faster and float higher.
• Flat, round, and S-hulls can be manual.
• V-bottoms and multi-chine hulls need engines.
• Sharper hulls use sails for extra control and balance.
• Hybrid hulls have a narrow front and a wide back.
• Pontoons emphasize buoyancy and floating power.
• Hard chines have acute angles while regular chines slop gently.

What type of hull do you have on your latest boat? Show us some photos in the comments!

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Types of Sailboats: Classification Guide

Sailboats can be divided into three basic types based on their hulls (catamaran, monohull or multihull) , their keel and their rigging, and then further subdivided from there. The result is that there are actually well over a dozen different kinds of sailboats out there.

Sailboat Hull Types

There are three main hull types that you’ll find in sailboats.

• Monohull: This is what most people think of when they think of a sail boat or any boat at all, really. A monohull sailboat has a single hulled structure that gives a boat that traditional boat shape we all instantly recognize. These are far and away the most common hull type for sailboats because they’re some of the oldest, they’re cheaper to produce, and they are fairly easy to maintain compared to the other options. You can do a lot more with the rigger in monohull sailboats and any sailing vessel with multiple masts is invariably going to be a monohull one. The downside of the monohull compared to the others is that they lack the stability.
• Catamaran: The second hull type you’ll find in sailboats is the catamaran . While technically a multihull vessel, they feature two hulls that are located on either side of the boat connected by a deck. Because it’s just the two, they get called catamarans rather than multihull which generally refers to three. Catamarans had been used by ancient peoples for years but never really caught on with “modern” boating for quite a long time. Now that we have fiberglass hulls and other advances, catamarans are much more commonplace than they were a  hundred years ago. Catamarans offer great speed and stability but don’t have as much cabin space as a monohull.
• Trimaran/Multihull : This hull style features three hulls in a similar style to the catamaran with the addition of that third center hull. From the side you wouldn’t be able to tell a catamarans from trimaran sailboats. These boats are even faster and more stable than a catamaran and, by extension, a monohull. They have a very low center of gravity and a large beam. Space is still a drawback but the third hull increases room overall. There are also vessels with even more hulls, but they are exceedingly rare and also pretty expensive.

Sailboat Keel Types

Heading below the hull now and we’ll find the keel, which is what gives your sailboat added stability in the water. While multihull boats find stability in the additional hulls, a monohull boat will get stability from its keel. Though it’s nearly impossible to flip or capsize a trimaran, if it does happen it’s staying flipped or capsized. However, the keel on a monohull boat makes it even harder to flip because of the physics of resistance in the water. That isn’t to say a monohulled boat with a keel is unsinkable, quite the opposite, but you’re just not going to flip one upside down without a real fight. There are six main keel types you’ll find in sailboats.

• Bilge Keel: These are dual keels that can be like fin keels or even full keels extending the length of the vessel. They extend from the sides and can prevent the boat from rolling. They need to be symmetrical on both sides of the boat to work.
• Bulb Kee l: These are a kind of fin keel but they carry ballast in them. That allows them to have a little more stability. They operate like a hydrofoil
• Centerboard Keel: This type of keel actually pivots and can be changed depending on the depth of the water.
• Daggerboard Keel : Another kind of centerboard keel but the daggerboard can actually be pulled up into the hull. This allows you to alter its position for an increase or decrease in speed or stability as needed.
• Fin Kee l: If you’re into racing you’ll probably have a fin keel. They are thin but extend deep below the sailboat. This makes them great for speed but not really ideal for a comfortable ride. You wouldn’t want to be day sailing for fun and relaxation with a fin keel.
• Full Keel: This is the most common type of keel and it spans the entire length of the vessel. There will likely be a rudder built into the keel as well.
• Wing Keel : This is a variant on the fin keel. Wing keels have a small wing at the tip to allow better directional stability by reducing cross flow.

Sailboat Mast Configuration

The mast of the sailboat is obviously that large pole onto which sails are rigged. Depending on your boat type you may have one mast, two masts, or more masts. How these masts are configured is where you can start distinguishing sailboat types you may recognize by name.  These include:

Sloop: This is arguably the most popular type of sailboat mast type. A sloop has a single mast and two sails – the headsail and the mainsail. Being a single masted sailboat makes them easy to identify. These are probably the easiest to learn how to rig and how to sail. It’s versatile enough for cruising and for racing. Commonly these a gaff rig or a Bermuda rig. Another kind of sloop rig is the fractional rig sloop in which you can find one of the sails below the top of the mast.

Schooner: These can have multiple masts, not just two. The largest sailing vessels you’re likely to see, either in the present or in images from history, were schooners. Giant ships with six masts each bearing over 10 sails were schooners. An important detail is that the first mast on a schooner will always be shorter than the others. They are usually gaff-rigged

Cutter: This type of sailboat is very similar to the sloop and has a centrally located mast supporting three sails. Two headsails, the second called a staysail, is what distinguishes it most easily from the sloop. The rigging makes a cutter a bit harder to manage than a sloop.

Ketch : A ketch is a lot like a schooner but the two masts are arranged differently. On a ketch, the main mast is taller than the aft mast which is called the mizzen mast. The mizzen sail naturally is on the mizzen mast with the mizzen mast positioned aft.

Catboat : Also called a cat, a catboat has a single mast and a large, single gaff sail. The boats are usually short, stout boats that aren’t built for speed or for open seas. Best to be used in coastal waters

Yawl: This vessel is nearly identical to the ketch with one main difference. In a yawl, the helm is forward of the mizzen mast, while that is not the case in a ketch.

Other Types of Sailboats

Now that we have the basic configurations out of the way, let’s look at some of the more specific types of sailboats you may find at sea. In some cases you’ll see that these terms are not entirely specific and one term may actually apply to multiple kinds of sail boats in much the same way that something like SUV can describe multiple different vehicles that are similar but not all the same.

Sailing Dinghies

Like any dinghy, a sailing dinghy is going to be a small vessel. Typically made to accommodate just one or two people, they are under 15 feet and the smallest of which are often used by children. Optimist dinghies are raced professionally and must meet certain requirements to be officially registered as true Optimist boats. If you’re totally new to sailing, a sailing dinghy might be a good place to learn the ropes.

Daysailer generally refers to any sailboat that is not intended to either race other boats or keep you out on the water for an overnight stay. As such, it can cover a lot of ground. Typically, a daysailer will probably be between 14 feet and 20 feet. Usually you won’t get more than 4 people on board and there will be room for storing gear but not a sleeping berth. These are great beginner sailboats.

Pocket Cruisers

Like a daysailer, a pocket cruiser is more of a general label for boats rather than a specific kind. In this case, any sailboat under 30 feet could technically be considered a pocket cruiser. Basically it should be trailerable and used for either cruising or racing. They may contain a small cabin or berth. They could be outfitted for long offshore trips.

Trailer Sailer

Very similar to a pocket cruiser, a trailer sailer is a smaller vessel but still larger than a sailing dinghy. There is clear overlap between trailer sailers, daysailers, and pocket cruisers and the same name could technically be used for many different boats. The defining characteristic of a trailer sailer is that it can easily be transported by trailer behind your tow vehicle. Unlike a sailing dinghy, a trailer sailer would likely have a retractable keep like a centerboard or daggerboard.

Racing Sailboats

These boats can be very large, anywhere from 20 feet to over 70 feet, and they are designed to be light and fast on the water. Larger racing sailboats required a skilled crew to operate. These have keels intended to increase speed and even laminate sales to improve performance. Smaller racing boats can be manned by just one or two people. They don’t offer a lot of creature comforts and aren’t meant for relaxing trips at sea.

Beach Catamarans

Beach cats get their name from the fact they’re designed to be beached and can be launched again from the beach if you so desire. They are usually under 25 feet and not meant for extending sailing offshore, rather they are designed for daysailing. They are very agile and fast and take a good foundation of knowledge to control properly.

Cruising Catamarans

This is the larger style of catamaran designed for more serious boating. Like any catamaran they have a shallow draft but these can be between 25 feet and up to more than 50 feet. They’re designed for extended cruising offshore.

Cruising Sailboats

Boats like schooners quality as a cruising boat and they are typically at least 16 feet in length but may get well over 50 feet as well. Cruising sailboats include cabins for extended stays offshore and, if the boat is large enough, will likely have a fairly large living space below deck which includes a galley and a head in addition to sleeping berths. These are often called liveaboard sailboats .

Cruisers are often monohull but can just as easily be multihull. When properly outfitted they can be used for long, extended stays at sea that last weeks or more. Depending on rigging a cruising sailboat could easily be a sloop, a schooner, a cutter, a ketch or even a superyacht.

Racing Cruisers

This is essentially a hybrid of the cruising sailboat and the racing sailboat. It’s built for more speed than a cruiser but it will have better accommodations than a racing sailboat to allow for stays at sea.  The end result is a lighter cruiser ideal for a few days at sea that can get some good speed.

Bluewater Cruising Boats

These are basically the next step up from a cruising sailboat. A bluewater cruiser is meant to sail across oceans, which is where the bluewater part of the name comes from. These are large sailboats and are best only sailed by skilled sailors. They can be outfitted for very long stays at sea and are able to handle rough weather better than smaller vessels.

Motorsailers

You don’t hear this term much anymore but it refers to a sailboat that also has an inboard motor so that they can travel under engine power or wind power. Typically these are larger vessels with accommodations below deck and designed for extended stays off shore. That said, because they mix both styles of boat, they fall somewhere short of either in terms of performance. The engine takes up space and adds weight, limiting your sailing abilities. Obviously traditional sailboats won’t include a motor.

The Bottom Line

There are a number of different kinds of sailboats and the easiest way to distinguish them is by comparing hull types, sail and mast configuration, and keels. Many terms you hear to describe sailboats can describe more than one kind, while others are very specific and the boat must meet certain requirements to merit the name. The only thing that truly unites every type of sailboat is the fact it must be powered by the wind, and even then there are hybrid versions that use motor power sometimes.

Learning the rigging of the different types of sailboats, including things like gaff rigs, standard rigging, and other rig types can be hard work and time consuming as some of these sailing boat rig types are far more complex than others.

My grandfather first took me fishing when I was too young to actually hold up a rod on my own. As an avid camper, hiker, and nature enthusiast I'm always looking for a new adventure.

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All You Need to Know: Explaining the Different Types of Sailboats

Sailboats are a type of watercraft that are powered by the wind. They come in a variety of shapes and sizes, each with its unique characteristics and features. Understanding the different types of sailboats and their uses can be helpful for those who are interested in sailing or looking to purchase a sailboat.

Several factors determine the types of sailboats, including the hull type , keel type , mast configuration, and sails and rigging . The hull is the boat’s body and can be either a monohull, catamaran , or trimaran .

The keel is the underwater part of the hull that provides stability and can be either a fin keel, wing keel, bilge keel, daggerboard, or centerboard. The mast configuration and sails determine how the boat is powered, and can be a sloop, fractional rig sloop, ketch, schooner, yawl, cutter, or cat.

Types of Sailboats

Sailboats come in many different shapes and sizes, each designed for a specific purpose. Here are the most common types of sailboats:

Cruising Sailboats

Cruising sailboats are designed for long-distance sailing and living aboard. They typically have a spacious interior with a galley, head, and sleeping quarters. They also have a large fuel and water capacity to allow for extended time at sea. Cruising sailboats come in many different sizes, from small pocket cruisers to large bluewater yachts.

Racing Sailboats

Racing sailboats are designed for speed and agility. They typically have a lightweight hull and a tall mast with a large sail area. Racing sailboats come in many classes , from dinghies to large offshore racing yachts. They are designed to be sailed by a skilled crew and require a high level of skill and experience to handle.

Daysailers are designed for short trips and day sailing. They typically have a simple interior with minimal accommodations. Daysailers come in many different sizes, from small dinghies to larger keelboats. They are easy to handle and are a great choice for beginners or for those who want to enjoy a day on the water without the hassle of a larger boat.

Catamarans are sailboats with two hulls. They are designed for stability and speed and are often used for cruising or racing. Catamarans have a spacious interior and a large deck area, making them a popular choice for those who want to live aboard or entertain guests. They are also popular for chartering and can be found in many popular sailing destinations around the world.

Trimarans are sailboats with three hulls. They are designed for speed and stability and are often used for racing or long-distance cruising. Trimarans have a narrow hull and a large sail area, making them incredibly fast and agile on the water. They are also popular for their spacious interior and large deck area, making them a great choice for those who want to live aboard or entertain guests.

Sailboat Hull Types

When it comes to sailboats, there are two main categories of hull types: monohull and multihull. Each has its unique characteristics and advantages.

Monohull Sailboats

Monohull sailboats are the most common type of sailboat. They have a single hull, and the hull is typically long and narrow, which makes them more efficient when sailing upwind. Monohulls come in a variety of styles, including:

• Flat-bottom vessels
• Fin-keel racers
• Bulb and bilge keel cruisers
• Heavy semi-displacement sailboats
• Dense full-keel displacement cruisers

Each of these styles has its advantages and disadvantages. For example, flat-bottom vessels are the most stable, but they don’t work well in deep waters. Fin-keel racers are designed for speed and performance but may not be as comfortable for long-term cruising.

Multihull Sailboats

Multihull sailboats have two or more hulls. The most common types of multihulls are catamarans and trimarans. Multihulls have several advantages over monohulls, including:

• More stability
• Better performance in light winds

Catamarans have two hulls, which are connected by a deck. They are known for their stability and spaciousness. Trimarans have three hulls, which make them even more stable and faster than catamarans. However, they are not as spacious as catamarans.

Sailboat Rigging Types

When it comes to sailboat rigging types, there are several options to choose from. Each type of rig has its advantages and disadvantages, and choosing the right one will depend on a variety of factors, including the type of sailing you plan to do and the size of your boat . Some of the most common sailboat rigging types include:

The sloop rig is one of the most popular sailboat rigging types and is commonly used on boats ranging in size from small dinghies to large cruisers. It consists of a single mast with a mainsail and a jib or genoa. The mainsail is typically a triangular shape, while the jib or genoa is a smaller sail that is used to control the boat’s direction.

The cutter rig is similar to the sloop rig but with an additional headsail. This makes it a popular choice for sailors who want more control over their boat’s speed and direction. The mainsail is still triangular, but the headsail is typically smaller than the jib or genoa used in a sloop rig.

The ketch rig is a two-masted sailboat rigging type that is commonly used on larger boats. It consists of a main mast and a smaller mizzen mast located aft of the cockpit. The mainsail is typically triangular, while the mizzen sail is smaller and located behind the cockpit. The ketch rig is known for its versatility and is often used for long-distance cruising.

The yawl rig is similar to the ketch rig but with a smaller mizzen mast located further aft. This makes it a popular choice for sailors who want more control over their boat’s direction, especially in heavy winds. The yawl rig is also known for its ability to sail close to the wind, making it a popular choice for racing sailors.

Sailboat Sails

Several types of sails are commonly used on sailboats . Each sail has a specific purpose and is designed to work in different wind conditions. The main types of sails include mainsails, jibs, genoas, and spinnakers.

The mainsail is the largest sail on a sailboat and is typically located behind the mast. It is attached to the mast and boom and is used to capture the wind and propel the boat forward. The mainsail is the most important sail on the boat and is used in a wide range of wind conditions.

The mainsail can be adjusted in several ways to optimize its performance. The sail can be reefed, or reduced in size, to reduce the amount of sail exposed to the wind in high winds. The sail can also be twisted to adjust the shape of the sail and improve its performance in different wind conditions.

The jib is a smaller sail that is located in front of the mast. It is attached to the mast and forestay and is used to help balance the boat and improve its performance in light wind conditions. The jib is typically used in conjunction with the mainsail and can be adjusted to optimize its performance.

There are several types of jibs, including the working jib, the genoa jib, and the storm jib. The working jib is the most common type of jib and is used in moderate wind conditions. The genoa jib is a larger jib that is used in light wind conditions, while the storm jib is a smaller jib that is used in high wind conditions.

The genoa is a large jib that is used in light wind conditions. It is similar to the jib but is larger and overlaps the mainsail. The Genoa is attached to the mast and forestay and is used to capture as much wind as possible to propel the boat forward.

The Genoa is typically used in conjunction with the mainsail and can be adjusted to optimize its performance. It can be furled, or rolled up when not in use to reduce wind resistance and improve the boat’s performance.

The spinnaker is a large, balloon-shaped sail that is used for downwind sailing. It is typically used in light wind conditions and is attached to a spinnaker pole to keep it away from the boat’s mast and sails.

The spinnaker is used to capture as much wind as possible and propel the boat forward. It is typically used in conjunction with the mainsail and jib and can be adjusted to optimize its performance.

What factors determine the types of sailboats?

The factors that determine the types of sailboats include hull type, keel type, mast configuration, and sails and rigging.

What are the two main categories of sailboat hull types?

The two main categories of sailboat hull types are monohull and multihull.

What are some common sailboat rigging types?

Common sailboat rigging types include sloop rig, cutter rig, ketch rig, and yawl rig.

What are the main types of sails used on sailboats?

The main types of sails used on sailboats include mainsails, jibs, genoas, and spinnakers.

What are the differences between a catamaran and a trimaran?

A catamaran has two hulls connected by a deck, while a trimaran has three hulls. Trimarans are generally more stable and faster than catamarans, but they are not as spacious.

About the author

I worked as an officer in the deck department on various types of vessels, including oil and chemical tankers, LPG carriers, and even reefer and TSHD in the early years. Currently employed as Marine Surveyor carrying cargo, draft, bunker, and warranty survey.

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Boat Hull Types and Shapes

The shape of the hull is a defining feature of any watercraft. Boat hulls do not only differ in appearance, their varying structural characteristics make them more or less suited to specific water activities. Different boat hull types have different functions.

Some hulls displace water as the boat travels, while others are designed to ride on top of the water’s surface, called “planing”. Within these two broad categories, there are numerous variations of boat hull shape.

What is a boat hull?

Let’s begin with a few basic definitions. The hull is the body of a boat. This term refers to the part of the boat structure that is watertight, with the deck considered a sort of roof to the hull structure. The line where the hull meets the water surface is called the waterline , and the angle (measured in degrees) of the hull relative to the water surface is called the deadrise . Boaters can measure deadrise at various points on a boat to assess how well the vessel will travel through the water.

Here are the main types of boat hulls, and the types of water travel they are best suited to.

Displacement Hulls

Displacement hulls are commonly found in large ships, trawlers, and traditional recreational sailboats. Although they may not be the fastest, these hulls offer stability and are capable of carrying substantial loads with smaller propulsion systems. The bottom of displacement hulls is typically rounded, with ballast positioned low in the center. When stationary, these rounded hulls tend to roll in response to waves and swells.

Displacement hulls are predominant in sailing boats, slow-moving vessels, and sizable watercraft such as cruise ships. Their combination of weight and power causes them to settle deeper into the water, displacing water rather than skimming across its surface.

Round-Bottom Hulls

Hulls with a round-bottomed design are usually a type of displacement hull, and they are designed to move effortlessly and seamlessly through the water. A canoe is a perfect example of a round-bottomed hull.

However, it’s important to note that this design feature comes with a trade-off in terms of stability, as round-bottomed hulls are prone to wobbling and capsizing. You have to be extra careful when embarking, disembarking, and loading these types of boats.

Planing Hulls

Powerboats and personal watercraft commonly feature planing hulls, which allow them to skim across the water’s surface at higher speeds. These hulls exhibit displacement hull characteristics at lower speeds but will transition into a planing state at around 15-16 MPH, depending on factors like design and weight. Planing hulls come in various shapes, each offering its own advantages and disadvantages.

Planing hulls are favored in smaller, faster watercraft. Their design facilitates rising up and gliding on the water’s surface when traveling at higher speeds.

Flat-Bottom Hulls

Boats equipped with flat-bottomed hulls offer exceptional stability and can accommodate heavier loads. These boats require minimal engine power to achieve planing, but they can be less comfortable when navigating through choppy waters or heavy weather conditions.

Flat hulls are commonly found in small aluminum or fiberglass bay and fishing boats, providing shallow drafts and ample deck space. These features make them well-suited for leisure activities like fishing in calm environments like small lakes, ponds, and slow-flowing rivers.

V-shaped, V-bottom or ‘Vee-shaped’ Hulls

Deep V-shaped hulls are designed to slice through waves effortlessly and provide a smooth ride even in choppy waters. However, they require a bit more power to get onto a plane, and during sharp turns, they have a tendency to roll or bank. The angle of the hull also means that these boats have limited interior volume for storing belongings or accommodating passengers. Fast, long-distance fishing boats, like center consoles, often feature V bottoms because they allow them to zip across open water and reach fishing spots quickly.

V-shaped Hulls are the most popular type of hull for powerboats and fiberglass motorboats. Typically, these boats are equipped with larger engines compared to flat or round-bottomed boats, enabling them to achieve impressive performance on the water.

Multi-Hulled Boats

Multi-hulled boats have separate and distinct hulls. These can be either planing or displacement hulls depending on the size of the boat and the engine. Catamarans, trimarans, pontoons boats and certain types of houseboats are multi-hull water vessels. Multi-hull boats include both sailboats and powerboats.

Multi-hull boats are among the most stable types of boat, but they require more room to steer and turn.

Learn more about boat hulls with Drive A Boat USA!

Boats with different shaped hulls are suited to different types of water activities. While planing hulls are best for travelling at high speeds, displacement hulls are better suited to larger boats or leisurely activities on calm water. Within these two broad categories, intrepid boaters can also choose from among flat-bottomed, round-bottomed, v-shaped and multi-hulled boats.

Choosing the right type of boat is important to boating safety . The right hull can also make a difference to your boating comfort. Even if you are just learning how to drive a boat , it is important to understand the structure of your vessel and be aware of its limitations and functionalities.

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Types of Sailboats: A Complete Guide

Last Updated by

Daniel Wade

June 15, 2022

Learning the different types of sailboats can help you identify vessels and choose the right boat.

In this article, we'll cover the most common kinds of sailboats, their origins, and what they're used for. We'll also go over the strengths and weaknesses of each design, along with when they're most useful.

The most common kind of sailboat is the sloop, as it's simple to operate and versatile. Other common sailboat types include the schooner, cutter, cat, ketch, schooner, catamaran, and trimaran. Other sailboat variations include pocket cruisers, motorsailers, displacement, and shoal-draft vessels.

The information found in this article is sourced from boat reference guides, including A Field Guide to Sailboats of North America by Richard M. Sherwood and trusted sources in the sailing community.

Table of contents

Distinguishing Types of Sailboats

In this article, we'll distinguish sailboats by traits such as their hull type, rig, and general configuration. Some sailboats share multiple characteristics with other boats but fall into a completely different category. For example, a sailboat with a Bermuda rig, a large engine, and a pilothouse could technically be called a sloop, but it's more likely a motorsailer.

When discerning sailboat type, the first most obvious place to look is the hull. If it has only one hull, you can immediately eliminate the trimaran and the catamaran. If it has two or more hulls, it's certainly not a typical monohull vessel.

The next trait to consider is the rig. You can tell a lot about a sailboat based on its rig, including what it's designed to be used for. For example, a long and slender sailboat with a tall triangular rig is likely designed for speed or racing, whereas a wide vessel with a complex gaff rig is probably built for offshore cruising.

Other factors that determine boat type include hull shape, overall length, cabin size, sail plan, and displacement. Hull material also plays a role, but every major type of sailboat has been built in both wood and fiberglass at some point.

Sailboat vs. Motorsailer

Most sailboats have motors, but most motorized sailboats are not motorsailers. A motorsailer is a specific kind of sailboat designed to run efficiently under sail and power, and sometimes both.

Most sailboats have an auxiliary engine, though these power plants are designed primarily for maneuvering. These vessels cannot achieve reasonable speed or fuel-efficiency. Motorsailers can operate like a powerboat.

Motorsailers provide great flexibility on short runs. They're great family boats, and they're popular in coastal communities with heavy boat traffic. However, these features come at a cost. Motorsailers aren't the fastest or most efficient powerboats, and they're also not the most agile sailboats. That said, they make an excellent general-purpose sailing craft.

Monohull vs. Multi-hull: Which is Better?

Multihull sailboats are increasingly popular, thanks to advances and lightweight materials, and sailboat design. But are they better than traditional sailboats? Monohulls are easier to maintain and less expensive, and they offer better interior layouts. Multihulls are more stable and comfortable, and they're significantly easier to control. Multihull sailboats also have a speed advantage.

Monohull Sailboats

A monohull sailboat is a traditionally-shaped vessel with a single hull. The vast majority of consumer sailboats are monohulls, as they're inexpensive to produce and easy to handle. Monohull sailboats are proven and easy to maintain, though they lack the initial stability and motion comfort of multi-hull vessels.

Monohull sailboats have a much greater rig variety than multi-hull sailboats. The vast majority of multihull sailboats have a single mast, whereas multi-masted vessels such as yawls and schooners are always monohulls. Some multi-hull sailboats have side-by-side masts, but these are the exception.

Catamaran Sailboats

The second most common sailboat configuration is the catamaran. A catamaran is a multihull sailboat that has two symmetrical hulls placed side-by-side and connected with a deck. This basic design has been used for hundreds of years, and it experienced a big resurgence in the fiberglass boat era.

Catamarans are fast, efficient, and comfortable. They don't heel very much, as this design has excellent initial stability. The primary drawback of the catamaran is below decks. The cabin of a catamaran is split between both hulls, which often leaves less space for the galley, head, and living areas.

Trimaran Sailboats

Trimarans are multi-hull sailboats similar to catamarans. Trimarans have three hulls arranged side-by-side. The profile of a trimaran is often indistinguishable from a catamaran.

Trimarans are increasingly popular, as they're faster than catamarans and monohulls and considerably easier to control. Trimarans suffer from the same spatial limitations as catamarans. The addition of an extra hull adds additional space, which is one reason why these multi-hull vessels are some of the best-selling sailboats on the market today.

Sailboat Rig Types

Rigging is another way to distinguish sailboat types. The rig of a sailboat refers to it's mast and sail configuration. Here are the most common types of sailboat rigs and what they're used for.

Sloops are the most common type of sailboat on the water today. A sloop is a simple single-mast rig that usually incorporates a tall triangular mainsail and headsail. The sloop rig is easy to control, fun to sail, and versatile. Sloops are common on racing sailboats as they can sail quite close to the wind. These maneuverable sailboats also have excellent windward performance.

The sloop rig is popular because it works well in almost any situation. That said, other more complex rigs offer finer control and superior performance for some hull types. Additionally, sloops spread their entire sail area over just to canvases, which is less flexible than multi-masted rigs. The sloop is ideal for general-purpose sailing, and it's proven itself inland and offshore.

Sloop Features:

• Most popular sailboat rig
• Single mast
• One mainsail and headsail
• Typically Bermuda-rigged
• Easy to handle
• Great windward performance
• Less precise control
• Easier to capsize
• Requires a tall mast

Suitable Uses:

• Offshore cruising
• Coastal cruising

Cat (Catboat)

The cat (or catboat) is a single-masted sailboat with a large, single mainsail. Catboats have a thick forward mast, no headsail, and an exceptionally long boom. These vessels are typically gaff-rigged, as this four-edged rig offers greater sail area with a shorter mast. Catboats were popular workboats in New England around the turn of the century, and they have a large following today.

Catboats are typically short and wide, which provides excellent stability in rough coastal conditions. They're hardy and seaworthy vessels, but they're slow and not ideal for offshore use. Catboats are simple and easy to control, as they only have a single gaff sail. Catboats are easy to spot thanks to their forward-mounted mast and enormous mainsail.

Catboat Features:

• Far forward-mounted single mast
• Large four-sided gaff sail
• Short and wide with a large cockpit
• Usually between 20 and 30 feet in length
• Excellent workboats
• Tough and useful design
• Great for fishing
• Large cockpit and cabin
• Not ideal for offshore sailing
• Single sail offers less precise control
• Slow compared to other rigs
• Inland cruising

At first glance, a cutter is difficult to distinguish from a sloop. Both vessels have a single mast located in roughly the same position, but the sail plan is dramatically different. The cutter uses two headsails and often incorporates a large spar that extends from the bow (called a bowsprit).

The additional headsail is called a staysail. A sloop only carries one headsail, which is typically a jib. Cutter headsails have a lower center of gravity which provides superior performance in rough weather. It's more difficult to capsize a cutter, and they offer more precise control than a sloop. Cutters have more complex rigging, which is a disadvantage for some people.

Cutter Features:

• Two headsails
• Long bowsprit
• Similar to sloop
• Gaff or Bermuda-rigged
• Fast and efficient
• Offers precise control
• Superior rough-weather performance
• More complex than the sloop rig
• Harder to handle than simpler rigs

Perhaps the most majestic type of sailboat rig, the schooner is a multi-masted vessel with plenty of history and rugged seaworthiness. The schooner is typically gaff-rigged with short masts and multiple sails. Schooners are fast and powerful vessels with a complex rig. These sailboats have excellent offshore handling characteristics.

Schooners have a minimum of two masts, but some have three or more. The aftermost large sail is the mainsail, and the nearly identical forward sail is called the foresail. Schooners can have one or more headsail, which includes a cutter-style staysail. Some schooners have an additional smaller sale aft of the mainsail called the mizzen.

Schooner Features:

• At least two masts
• Usually gaff-rigged
• One or more headsails
• Excellent offshore handling
• Precise control
• Numerous sail options (headsails, topsails, mizzen)
• Fast and powerful
• Complex and labor-intensive rig
• Difficult to adjust rig single-handed
• Offshore fishing

Picture a ketch as a sloop or a cutter with an extra mast behind the mainsail. These vessels are seaworthy, powerful, excellent for offshore cruising. A ketch is similar to a yawl, except its larger mizzen doesn't hang off the stern. The ketch is either gaff or Bermuda-rigged.

Ketch-rigged sailboats have smaller sails, and thus, shorter masts. This makes them more durable and controllable in rough weather. The mizzen can help the boat steer itself, which is advantageous on offshore voyages. A ketch is likely slower than a sloop or a cutter, which means you aren't likely to find one winning a race.

Ketch Features:

• Headsail (or headsails), mainsail, and mizzen
• Mizzen doesn't extend past the rudder post
• Good offshore handling
• Controllable and mild
• Shorter and stronger masts
• Easy self-steering
• Slower than sloops and cutters
• Less common on the used market

A dinghy is a general term for a small sailboat of fewer than 28 feet overall. Dinghys are often dual-power boats, which means they usually have oars or a small outboard in addition to a sail. These small boats are open-top and only suitable for cruising in protected waters. Many larger sailboats have a deployable dinghy on board to get to shore when at anchor.

Dinghy Features:

• One or two people maximum capacity
• Easy to sail
• Works with oars, sails, or an outboard
• Great auxiliary boat
• Small and exposed
• Not suitable for offshore use
• Going from anchor to shore
• Protected recreational sailing (lakes, rivers, and harbors)

Best Sailboat Type for Stability

Stability is a factor that varies widely between sailboat types. There are different types of stability, and some sailors prefer one over another. For initial stability, the trimaran wins with little contest. This is because these vessels have a very high beam-to-length ratio, which makes them much less prone to rolling. Next up is the catamaran, which enjoys the same benefit from a wide beam but lacks the additional support of a center hull section.

It's clear that in most conditions, multihull vessels have the greatest stability. But what about in rough weather? And what about capsizing? Multihull sailboats are impossible to right after a knockdown. This is where full-keel monohull sailboats excel.

Traditional vessels with deep displacement keels are the safest and most stable in rough weather. The shape, depth, and weight of their keels keep them from knocking over and rolling excessively. In many cases, these sailboats will suffer a dismasting long before a knockdown. The primary disadvantage of deep-keeled sailboats is their tendency to heel excessively. This characteristic isn't hazardous, though it can make novice sailors nervous and reduce cabin comfort while underway.

Best Sailboat Type for Offshore Cruising

The best sailboat type for offshore cruising is the schooner. These graceful aid robust vessels have proven themselves over centuries as durable and capable vessels. They typically use deep displacement keels, which makes them stable in rough weather and easy to keep on course.

That said, the full answer isn't quite so simple. Modern multihull designs are an attractive option, and they have also proven to be strong and safe designs. Multihull sailboats are an increasingly popular option for offshore sailors, and they offer comfort that was previously unknown in the sailing community.

Many sailors cross oceans in basic Bermuda-rigged monohulls and take full advantage of a fin-keel design speed. At the end of the day, the best offshore cruising sailboat is whatever you are comfortable handling and living aboard. There are physical limits to all sailboat designs, though almost any vessel can make it across an ocean if piloted by a competent skipper and crew.

Best Sailboat Type for Racing The modern lightweight Bermuda-rigged sailboat is the king of the regatta. When designed with the right kind of hull, these vessels are some of the fastest sailboats ever developed. Many boats constructed between the 1970s and today incorporate these design features due to their favorable coastal and inland handling characteristics. Even small sailboats, such as the Cal 20 and the Catalina 22, benefit from this design. These boats are renowned for their speed and handling characteristics.

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I've personally had thousands of questions about sailing and sailboats over the years. As I learn and experience sailing, and the community, I share the answers that work and make sense to me, here on Life of Sailing.

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Sailboat Types: Full-Guide

For generations, sailing has been a mode of essential transportation, a rewarding hobby, an active and competitive sport, and a lifestyle. Sailing appeals to all, and there are dozens and dozens of types of sailboats.

Small sailboats are perfect for kids to sail on, and massive sailboats are used to cross oceans in style. In between, there are daysailers, racers, and cruisers. 

Table of Contents

• What Does a Sailboat Look Like? 

Small Sailboats

Cruising boats, cruising catamarans, cruising trimarans, full keel boats, fin keel boats, centerboard keel.

• Hydrofoil Sailboats 

A Purpose for Every Type of Sailboat

Faqs (frequently asked questions).

What Are Sailboat Types?

Sailboats are boats that are propelled by the wind. Sailboats use wind power instead of a motor or oars to move the boat. It should be noted, though, that nearly all modern sailboats have a motor as well. It comes in handy when docking in tight marinas and if the wind dies!

A sailboat has one, two, or three hulls. It has at least one mast, or tall vertical spar, that holds up one or more sails. The sails harness the power of the wind to move the boat forward.

To get started, here are some sailing boat types and terms to give you an idea of the sorts of boats that are out there.

• Dinghies — a small open boat, usually for only one or two people
• Daysailors — boats designed to go out for a day trip
• Cruising Sailboats — boats designed to travel long distances that have accommodations for their crew to live aboard a long term
• Sloop — the most common type of sailboat, with one mast and two sails (a jib and a mainsail)
• Ketch, yawl, or schooner — types of sailboats with two or more masts
• Monohull — a boat with only one hull
• Catamaran — a boat with two equal-sized hulls in the water that are connected together by a bridge deck
• Trimaran — a boat with three hulls in the water, the center of which is much larger than the outer two

What Does a Sailboat Look Like?

There are many different types of sailboats, so they look a little different from each other. The basics, however, are the same. 

Each sailboat has at least one hull that sits in the water. Part of the hull is visible above the waterline. Part of the sailboat hull sits below the waterline. 

The part beneath the waterline might be relatively small, or it can be quite large. The rudder, the mechanism used to steer the boat, is also underwater. 

The cockpit is where the helmsperson sits and steers the boat. On small boats, the cockpit takes up the entire boat. Cruising boats have interior accommodations as well as a safe cockpit.

Sailboats have at least one mast and at least one mainsail. As you get to know the different types of sailboats, you’ll see many different hull and sail configurations. 

Different Types of Sail Boats

Sailboats come in all types of sailboat shapes and sailboat sizes . Sailboats can be classified by their hull shape, size, or sail plan. The sail plan is how many sails they carry on how many masts.

Hull shapes include monohulls, catamarans, trimarans, and sailing hydrofoils. A monohull has just one hull, a catamaran has two hulls, a trimaran has three hulls, and a hydrofoil lifts out of the water. 

Sizes range from eight-foot sailboats to megayachts that are hundreds of feet long. Some sailboats are so small they are only suitable for one child who wants to go skimming across the lake. The largest pure sailing yacht in the world is the Black Pearl at 350 feet long (106.7 meters) long. Visit our Yacht vs Sailboat guide for a more definitive difference between the two and their sizes.

Sailboats also have different sail configurations or sail plans. For example, a sailboat with just one big sail on a forward-mounted mast is called a catboat. A boat with dozens of different sails on three masts is called a three-mast schooner.

Small sailboats are extremely popular and offer a lot of fun to the young and old. Most of the time, these boats are just used for daytime use in pleasant weather conditions. Kids often learn to sail in small monohull sailboats. Families might go for a picnic in a Hobie catamaran. 

Yacht club members might race their 16-foot daysailors, while adventurous souls might take their 19-ft weekender and anchor in a calm cove for the weekend. 

What is a Small Sailboat Called?

Small sailboats have different names, depending on the type of sailboat and the number of sail boat hulls. For example, the boat might be a monohull dinghy, small catboat, small catamaran, or daysailor.

Additionally, like every car on the road, every boat on the water is identified by its make and model. In small boats that are commonly raced, a certain make and model may set up a class of racing boats. Class racing means that all of the boats are identical, so the race is based solely on the skills of the skippers.

Sailing Dinghies

Kids and adults often learn to sail on sailing dinghies. Sailing dinghies can be as small as eight feet long. This small size makes it easy for kids to handle.

Some common sailing dinghies are Optis, Lasers, and Sunfish.

This size sailboat is also functional. They can be used to ferry sailors from their larger anchored boats to shore. The small size also helps sailors easily store their dinghy on larger boats. The word dinghy is often used to refer to any small boat used as a tender for a larger vessel, even if the tender is a motorboat.

Cat Rig Boats

A cat rig boat, or cat boat, is a type of sailboat that usually just has one large mainsail and a forward-mounted mast. Many smaller dinghies and training boats are catboats. A catboat has a free-standing mast with no standing rigging.

Small Catamarans

A catamaran is a boat with two hulls. The Hobie brand is synonymous with small catamarans, which are popular with families looking for a fun hobby. Hobie Cats are seen on the sand at beach resorts all over the world—they’re safe, fun, and fast.

Catamarans are faster than monohulls, and these boats are fun to race. Small catamarans are often used by families that live on the waterfront. Their lightweight makes them easy to drag to the waterfront and launch.

Small catamarans are also popular on beaches. Many beach resorts offer Hobie cats for rent. Small catamarans are between 12-20 feet in length. The hulls are joined only with spars and netting, so these fast and light open boats are not set up to carry a lot of people or supplies.

Daysailors are the ultimate fun boat. As the name implies, this type of sailing boat is used for day sailing. These boats are usually between 12 to 20 feet long. Some use these smaller boats for racing or overnight camping, but most sailors use daysailors for a leisurely sail.

Small Sailboats with Cabins

While most small sailboats just have a large open cockpit, several small yacht types have cabins. These cabins offer a chance for sailors to use a porta-potty or get out of the sun. Some small sailboats even have sleeping accommodations for overnight stays.

An excellent example of this is the Cape Dory Typhoon Weekender. This small sailboat is known as “America’s Littlest Yacht.” Down below, there are two small bunks for sleeping and enough space to have a small stove and a porta-potty. Most owners don’t stay aboard long-term, but the cabin is a useful place to stow items while sailing or to hide during a rainstorm.

Cruising boats are boats that are capable of traveling long distances. Cruising boats have sleeping accommodations, cooking facilities, and bathroom facilities. These boats are like RVs for the waterway.

Cruising boats offer sailors the chance to live on their boats while sailing. Like RVs, cruising sailboats travel to different ports of call. Cruising sailboats are one of the more popular types of sailing boat. They offer adventurous sailors the chance to enjoy sailing as a sport while seeing new things.

Cruising boats are usually 30 to 50 feet long. Most cruising couples prefer a boat that is around 40 feet long since this provides enough space to live comfortably and enough storage space for all of their gear.

Monohulls are very popular cruising boats. These boats offer good storage, are safe, and are easy for a couple to handle together. Monohulls have different types of sail configurations.

Cruising Bermuda Rigged Sloops

Most monohulls are Bermuda rig sloops. This sail plan features one mast with a mainsail and a headsail. Bermuda rig sloops are easy to single-hand and very versatile. How many sails does a sloop have? A Bermuda sloop flies two sails at a time, which are the mainsail and a headsail.

However, the boat might have other sails onboard. For example, the captain might take down the jib in light winds and use a bigger genoa to capture more wind power. During a downwind sail with light winds, the captain might rig a large spinnaker, which looks like a huge kite, to keep sailing even in little wind.

Even within the sloop category, there are many variations in the design. A masthead sloop is one whose forestay (headsail) goes all the way to the top of the mast. In contrast, a fractional sloop’s forestay connects at some point lower. So a 3/4 fractional rig has a headsail that only goes up three-quarters of the way to the top.

Riggers and boat designers have a lot of tools in their toolbox from which they can make a boat faster or more user-friendly. The type of rigging and sail plan a boat is equipped with offers it performance improvements as well as functionality.

Cruising Cutter

A cutter is a sailboat with one mast, one mainsail, and two sails forward of the mast. The sail at the front of the boat is the jib, genoa, or yankee depending on its size and cut. The next sail in, the inner headsail, is called the staysail. Island Packets are popular boats with this sail plan.

Cutters are popular choices as cruising and bluewater cruiser boats because the staysail provides the skipper with many different sail options. They could fly all three sails fully, or they could fly a small partial mainsail and just the staysail for heavy winds.

Cruising Ketch With Mizzen Sail

Some cruising monohulls are ketches. A ketch can be easily identified by its two masts. The forward mast is the main mast with a mainsail. The aft mizzen mast is shorter and has a mizzen sail. This sail plan can make it easier to carry a big sail area and configure the sails for various sailing conditions.

A boat with more than one mast is called a split rig because the rig is split between two shorter masts instead of all mounted on one tall one. The advantage of a split rig is that there are more sails, each of which is smaller. That makes them easier to handle, and important consideration when you are sailing alone or with only one other person.

Cruising Yawl

A yawl is similar to a ketch and has two masts. However, the mizzen mast on a yawl is aft of the rudder post, whereas it is forward of the rudder post on a ketch. This mizzen mast location is even further back than a ketch’s. Yawls are one of the less popular types of sailboats. However, like the ketch, they offer diverse sail options and can keep sailing in many different types of weather. 

On both ketches and yawls, the mizzen mast is shorter than the main mast. If the two masts are of equal height, or the forward mast is shorter, then you are looking at a schooner.

Cruising catamarans are one of the most popular classes of sailboats right now. This type of sailing boat has two hulls and offers sailors speed, space, and comfort. A cruising catamaran is usually between 40 and 60 feet long and 20 to 30 feet wide. The additional width offers cruise sailors huge amounts of space. 

Cruising catamarans have excellent storage space and ample living accommodations if you intend to living on a boat . These boats are popular with couples and families and are often used to sail around the world on circumnavigations. 

Cruising catamarans are usually fractional sloop rigs. They have one mast, a large mainsail, and a jib or genoa. In general, these boats are designed to be easy to sail and minimize complications.

Trimarans are a type of sailboat with three hulls. Trimarans are known to be fast and are popular with racing sailors. However, they are also gaining popularity as cruising boats. These boats usually have fewer accommodations than cruising monohulls and catamarans. However, more modern trimarans like the Neel Trimaran have luxurious living spaces.

Types of Keel

Another way to classify the different types of sailing boats is by looking at the boat’s keel type. You can easily get an idea of different keel designs by walking around a boatyard. When a sailboat is in the water, it is hard to tell the shape of its keel.

The keel is the bottom part of the hull and is underwater. The keel is structurally essential. The keel’s weight helps the boat sail evenly and uprightly. The force created by the water moving over the keel counteracts the effects of the wind on the sails.

So a keel does two jobs for a sailboat. First, it provides a force that allows a sailboat to sail into the wind. Second, it provides stability. If storm-force weather conditions cause a monohull boat to roll, the weight in the keel will help the boat right itself.

Many older cruising boats had full keels. The keel shape runs the entire length of the boat. A full-keel boat is strong and easy to manufacture. Full-keel boats often have deeper drafts. The boat’s draft refers to the amount of water it needs to float. Full-keel boats can’t go into the shallow anchorages that catamarans or swing-keel boats can access.

Captains often report that full-keel boats are harder to maneuver in tight places such as marinas. Full-keel boats lack quick maneuverability. They have a reputation for being slower than more modern designs, but they make up for this by providing a very comfortable and safe ride in rough weather.

A boat with a fin keel has a smaller underwater profile than a boat with a full keel. This smaller keel resembles a fish fin. Captains find fin keel boats easier to maneuver. Fin keels use their shape to create very effective forces underwater. That makes them very good at countering the forces on the sails, meaning that fin keels sail upwind very well.

A boat with a bulb keel has a torpedo-shaped bulb on the bottom of a fin keel. Bulb keels offer improved stability. Bulb keels have shallower keels than a fin keel boat. The bulb also lowers the center of gravity in the boat, making it more stable overall.

A wing keel features a keel with a small wing on either side of the keel. Viewed from above, the keel looks like it has a set of small airplane wings. 

Similar to a bulb keel, wing keel boats often have a shallower draft than fin-keel boats. However, the additional shape causes drag and can reduce sailing performance in some circumstances.

A centerboard is common on small daysailors that are launched and retrieved from trailers. Deep keels make getting those boats in and out of the water difficult. By chopping off the keel, you can make a sailboat as easy to launch as a powerboat.

Related: Best Trailerable Sailboats

But of course, a sailboat needs to have a keel. A centerboard is a simple swinging fin keel that can be raised or lowered. This provides some excellent benefits if the sailor on board likes to explore areas with shallow water.

Many bigger boats have centerboards, too. A boat with a centerboard can be seen as the best of both worlds. A centerboard boat has a fixed shallow draft keel. However, the captain can deploy the centerboard when sailing in deeper waters. The centerboard adds depth to the keel and offers increased stability and performance.

A modification of the centerboard is the swing keel — a ballasted keel that can be retracted like a centerboard . These are rare. They’re used on large cruising boats where the crews want the option of accessing shallow waters. In England, this type of boat is used and can be dried out when the tide goes out.

Racing Sailboats

Yacht racing is a popular sailing sport. It’s a great way to get out on the water while competing. In fact, racing is a great way for sailors to hone their sailing skills. Sailors have to pay close attention to weather conditions and manage their sails effectively to maximize their speed.

Sailors can race any boat with sails. Kids race sailing dinghies against each other. Club racers sail daysailors or catboats. Catamarans and trimarans are also popular race boats. Several classes of boat races in the Summer Olympics.

Hydrofoil Sailboats

A hydrofoil is a unique and modern type of racing sailboat. A hydrofoil can be a monohull, catamaran, or trimaran. A hydrofoil has wing-like foils on the hull’s underside.

As the sailboat speeds up, the hydrofoils lift the hull out of the water, and the hydrofoil sailboat almost appears to be flying above the water.

Because the hull is now out of the water, drag, and resistance are minimal, and the sailboat can sail even faster. For example, a dinghy that usually goes four knots can accelerate to 12 knots when fitted with a hydrofoil.

Most hydrofoil sailboats are catamarans and trimarans. The added width of these multihull sailboats gives the hydrofoil sailboat more stability.

Traditional Sailboats

Traditional sailboats are the type of sailboats used to transport people and goods before modern transportation options were available. Before the railway, cars, and airplanes, a tall ship sailboat was used to ship cargo and people across oceans and from port to port. 

A gaff rig refers to the gaff, which is the upper spar on a square-shaped sail. Gaff rigs can be used with any mast configuration, but this feature is usually seen on traditional boats like a catboat, tall ship, or schooner.

A schooner has at least two masts. They are different from other mast configuration designs with two spars in that both masts are equal in height, or the forward mast is shorter. Schooners are faster than most traditional boats and were often used to transport perishable goods such as fruit. 

Schooners were also popular race boats in the early 20th century. For example, first America’s Cup races were won by schooners.

Today, schooners are usually used as charters for vacations or youth sail training programs. But there are a few cruising boats out there that feature schooner rigs. 

Any way you divvy it up, there are tons of different types of sailboats out there. With a little research and a little looking, you’re sure to find one that suits your style and boating plans.

What are the classes of sailboats?

Sailboat styles can be classified by hull type, use, or sail plan. The types of sailboat hulls include monohulls, catamarans, and trimarans. You can also categorize the kinds of sailboats by their use. For example, sailors use their boats for daysailing, cruising, and racing. Finally, different kinds of sailboats have different sail plans. A sailboat might be a sloop, ketch, yawl, catboat, or schooner.  The term “classes” has a particular meaning in sailing, however. Class racing is the competitive racing between boats of the same make and model—boats of the same “class” or of “one design.” There are hundreds of different classes of sailboats out there. Some of the most popular classes include the Laser and Sunfish classes.

What is a small 2 person sailboat called?

A small two-person sailboat is a dinghy. These small boats are fun to sail on protected waters. Many kids learn to sail in a sailing dinghy. There are dozens of makes and models of sailing dinghies available, some are used in Olympic sailing racing while others are just rowboats with sail rigs attached.

Matt has been boating around Florida for over 25 years in everything from small powerboats to large cruising catamarans. He currently lives aboard a 38-foot Cabo Rico sailboat with his wife Lucy and adventure dog Chelsea. Together, they cruise between winters in The Bahamas and summers in the Chesapeake Bay.

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Types of Hulls Used For Vessels

Every marine vessel has a specific hull suited for that particular ship or boat. Over centuries, different kinds of crafts were constructed, leading to the evolution of different hull designs and types. Check out the different ship-hull types and boat hulls in this article.

Boats have been used by humanity since times immemorial. The earliest constructions included logs of wood tied together. As technology progressed, so did the size and nature of vessels. Huge ships came into the picture in the medieval era. They were constructed for carrying materials, preparing for wars, and so on.

Different crafts like sailboats or cargo ships have unique hulls; however, all hull designs have the same underlying principles.

Types of Hulls

First and foremost, let us briefly recapitulate the physics of flotation again. Any floating object is in a state of physical equilibrium due to a countering force offered by the water medium. Buoyancy or buoyant force equals the weight of volume displaced by the object. Known as displacement, it acts in a direction opposite to the object’s weight. Hence, the resultant force acting on the body equals zero. This is famously known as Archimedes’ principle.

Based on this principle of floatation, all known vessels, irrespective of size, type, purpose, complexity, operation, etc., can be categorized into three broad categories based on the kind of hulls used.

Displacement Hull: This is the simplest, earliest, and most basic hull type. Most vessels have displacement hulls, including canoes, large tankers , fishing boats, ocean liners, tugboats, or offshore support vessels. Resistance and friction define speed, depending on the partially submerged hull’s wet surface and the waves’ resistance.

Such vessels have a linear weight-buoyancy relationship; the heavier and larger the ship, the more the resistance and power required to increase speeds. Thus, a large vessel like a tanker or bulk carrier has a powering capability proportional to the hull size and displacement. Displacement hulls can be of monohull or multi-hull configurations. They have relatively fuller hull forms and are more acceptable for cruises, containerships, fighter vessels, etc.

Planing hull: They are fast vessels partially supported by the buoyancy force. The rest of the hull remains above the water surface due to the hydrodynamic lift generated. As their speed increases, the dynamic pressure increases with increasing aft draft, which helps propeller immersion, creating a forward lift. They have typical hull forms.

Semi-displacement hull:   Midway between the above two, semi-displacement hulls generate dynamic lift to a certain extent. Their hull forms are similar to displacement types, and most of the weight is supported by buoyancy.

Configuration of Hulls

While we have discussed the main types of hulls, let us now look at the basic configurations of hulls available.

Monohull: Most vessels like barges or large carriers have a single hull of displacement, semi-displacement, or planning type.

Multi-hulls:   A vessel having two or more hulls is multi-hulled. When there are two hulls, it is known as a catamaran, while trimarans have three hulls. Both the hulls support the superstructure and bridge deck of catamarans. Trimarans have a central hull and a secondary hull on either side.

Multi-hulled vessels are stable as the weight is distributed among the hulls. The greater the distance between the hulls, the more stable a vessel is. Another critical factor is the underdeck clearance between the two hulls. Large crossbeams, girders, and decks laterally join all the hulls, or an immense superstructure, if present.

SWATH: SWATH stands for Small Waterplane Area Twin Hull. It is a unique, modern twin-hull form but quite different from traditional catamaran configurations. For SWATH configuration, the hulls are characterized by two identical structures on either side and a remarkable under hull clearance visible above the water surface. While seeing the vessel, one can easily pose the question, given almost a hollow hull, where is the required buoyancy derived from? The answer ironically lies below!

The slender projections on either side extend underneath the water surface to large, tubular, broad cross-sections that account for the required displacement necessary to keep the vessel afloat. This typical design provides a two-fold advantage: Reduction of wave motion, drag, and resistance effects at the surface due to a narrow hull cross-section interspersed by an ample clearance; and more efficient stability.

Since the bulkier portion of the hull or structural pontoons lie well below the waterline, they are entirely free from surface effects like waves. SWATH is used in pleasure yachts, ferries, oceanographic research vessels, support vessels, small military vessels like patrol ships for coast guards, etc. However, they are not employed for larger vessels due to complex design and space limitations for cargo, heavier equipment, and machinery. Because of their typical design, they are strictly displacement type.

Common Hull Shapes

Ship hulls are primarily derived from traditional boat hulls. However, most hulls for larger passenger and cargo vessels are simple monohulls for cost-effectiveness and to avoid complexity in design. But depending on the speed and other requirements in terms of cargo, utilities, size, etc., they are altered in terms of fineness or different hull coefficients. Modern ship designs have a complex combination of the following hulls in varying degrees, optimizing voyage requirements, ship purpose, function, size, type, and so on.

Now let us look into some classical types of primary hull forms :

Round-Bottom Hulls or Bilge hulls are the most common forms of hulls present since the early days. Everything from a primitive fisherman’s boat or a canoe to a typical fishing trawler tends to have round-bottomed hulls. These hulls are seen almost everywhere and comprise a perfectly symmetric configuration with rounded curvatures that blend at the base region. They are typically displacement types and intended for slow to moderate speeds. However, because of their form, they encounter lesser drag forces and can offer higher rates in better sailing conditions.

Round hulls help seamlessly traverse all kinds of water bodies without much hindrance. They are efficient against wave resistances, owing to their increased submerged hull surface. However, owing to their shape, they can pose problems in stability given a high depth or draft. Often, they tend to roll in unfavorable conditions. This is not an issue for small boats or vessels, but the design parameters are carefully optimized for larger ocean-going vessels.

Round-bottom hulls are less prone to grounding. Furthermore, they offer an incredible amount of underdeck volume for cargo stowage, accommodation, and other amenities. These hulls are also known as bilged hulls because of their smooth curvature at the corners or bilge region.

Flat-Bottomed Hulls: One of the oldest and simplest types of hull curvatures, flat-bottomed hulls have a flat base, devoid of any angle, curvature, rise, etc. A barge or small fishing boat is the most classic example of a flat-bottomed hull. They are suitable for lakes, ponds, and rivers, with calm waters and shallow drafts. In wave or choppy conditions, they not only impose a high drag but also cause problems like bottom pounding and slamming. Another significant issue with such vessels is the risk of grounding. They are perfectly displacement type and are slow. However, some high-speed river crafts are flat-bottomed.

V-Bottom Hulls are opposites of a flat or a round hull. They virtually have no bottom as the two symmetric sides of the hull intersect at the lowest point at sharp oblique angles, making its cross-section look like a simple V. They are suitable for high-speed vessels like planning crafts. They are ideal for rough conditions with high wave-breaking efficiency without the slightest effect on their high speeds. Because of their shape, they have increased hydrodynamic lift capabilities and are very apt for planning vessels. They have high propulsive requirements and are hence, equipped with high-power engines. Of course, they have less underdeck hull volume because of their shape and form. Though hydrodynamically very efficient, they also can pose problems in stability and are risky during banking or turning at high speeds.

Chined Hulls: Most modern ship designs derive from chined forms. Though slightly complex, these hulls have a solid angle or angles at the lower bottom region of the hull. Chines can be soft or hard. A hard chine has more curves and swift, rapid changes in curvature. A soft chine is composed of lower angles or a combination of smaller tips to give a smoother form.

A round-bottom hull can be considered a perfectly soft chine with a tiny number of small angles. Similarly, a flat-bottom hull is a hard chine with a zero angle!

S-Shaped Hulls are similar to rounded hulls but with a significant difference. As shown, the side curvatures join to form a sharp, pointed apex. Each hull side resembles a crooked S or a spline form. These hulls were prevalent during the old times.

You might also want to read-

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About Author

Subhodeep is a Naval Architecture and Ocean Engineering graduate. Interested in the intricacies of marine structures and goal-based design aspects, he is dedicated to sharing and propagation of common technical knowledge within this sector, which, at this very moment, requires a turnabout to flourish back to its old glory.

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