sailboat with two foresails

WaterCraft 101

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Why Do Sailboats Have Two Sails? (Explained)

If you’ve ever been sailing or watched a regatta, you’ll know that boats typically have two or more sails. It’s uncommon to see them with less than that. But what’s the reason behind this? 

Sailboats have two sails to improve the boat’s maneuverability, balance, speed, and ease of handling. The front sail is called the jib, while the one behind it is the mainsail. Some boats have more than two sails to increase their stability and speed even further. 

The way sailboats work is very interesting, so you’ll want to learn more! In this article, I’ll give you some in-depth explanations for why sailboats have two sails. So keep reading, everything you need to know is below.

How Does Having Two Sails Help Sailboats? 

It’s rare to see a sailboat with only one sail, and this might make you wonder what the science is behind this phenomenon. So, how does having two sails help sailboats? 

Having two sails (a mainsail and a jib) helps sailboats by allowing the sailor to better maneuver the sailboat through the water, easily increase the boat’s speed, and have better handling over the boat overall. In short, having two sails offers improved control over the boat.

With all these benefits, sailors can handle their boats with ease. I’ll discuss these points in more detail below: 

Two Sails Offer Greater Maneuverability

Many beginner sailers make the mistake of assuming that sailboats move because the wind exerts a force on the sails. 

This is only partly true because when a boat has more than one sail, the wind’s current is split along the mast into two rough wind streams on either side of the sail. The space in front of the sail will have a low-pressure area, while the wind will create high pressure behind it. The pressure difference exerts a force on the sails that propels them forward. 

The sail will move in the wind stream direction with the lowest pressure by being dragged forward.

The lowest-pressure wind stream gradually stabilizes, resulting in the wind moving faster on that side of the sail. This causes the sailboat to move because the wind is pulling the sail, and it is the same concept as an airplane’s wings creating lift . 

Having Two Sails Allows for Increased Speed

A sailboat speeds up when a sail is perpendicular to the wind, with the wind blowing into the sail. 

However, having two or more sails can help your sailboat go even faster. Some wind gets caught on your mainsail and some blows around it when you’re out on the water.  The air that moves around the mainsail contributes to your sailboat’s acceleration, which you could further increase by adding another sail. 

Two Sails Increases the Ease of Handling 

When boats have two sails, you can handle them much easier. This is because all boats have a pivot point located behind the mast. Most of the mainsail’s surface area is behind the pivot point. 

If you were to sail your boat with only the mainsail, the wind’s force behind the pivot point would be greater than the force in front of it. The sailboat would then tend to turn in the wind’s direction. 

In a strong wind, sailing with only the mainsail would mean that your rudder wouldn’t be powerful enough to steer the sailboat, and you would need to rely on the mainsail to steer your boat. 

However, adding a jib to your sailboat would balance out the force from the mainsail, making it easier for the sailor to handle and making the boat more stable. 

A sailboat’s keel helps keep it upright by compensating for the wind’s sideways forces. However, you adjust the jib slightly to move the sailboat in another direction, proving that having two sails helps you control your sailboat more effectively. 

What Are Boats With Two Sails Called?  

Boats with two sails are called cutters or sloops. Both have a mast with two sails, but a cutter has two foresails, while a sloop has a mainsail and a jib. Ketches are also sailboats but feature more than one mast with multiple smaller sails. 

There are a variety of sailboats out there. Below is some more information about these three sailboat varieties: 

Cutter: Sail Configuration

Like sloops, cutters have a single mast. Unlike sloops, cutters usually have two headsails. Cutter headsails tend to have a lower center of gravity than the jib sail of sloops, giving cutters more stability and better control in rough conditions. Cutters are commonly seen in Bermuda-rigged or gaff-rigged configurations.

Regardless of the configuration, cutter rigging is more complex than the rigging of most sloops. This makes them a bit more challenging to handle single-handed.

Sloop: Sail Configuration

When most people think about sailboats, this is the one they see in their minds. The classic single mast, double sail configuration with a Bermuda rig is fun to sail and reasonably easy to control. The high-profile mast does, however, make them easier to capsize in rough conditions.

While the Bermuda rig is the most popular configuration for sloops, it is not the only one. Some sloops feature fractional sloop rigs or specially designed racing rigs. Fractional sloop rigs offer more stability options and usually are preferred for extended offshore use. As you may have guessed, Racing rigs are designed for speed and maneuverability.

Ketch: Sail Configuration

We’ll now take a short visit to touch on a type of sailboat with more than one mast. Ketches feature a taller mainmast near the front of the boat and a shorter mast near the rear. The shorter mast is called the mizzenmast.

This split rig divides the sail plan into smaller components than a single mast sailboat. A ketch can be either Bermuda-rigged or gaff-rigged. Ketches usually have smaller sails and shorter masts than sloops or cutters, making them easier to control in difficult weather conditions. 

Though generally slower than their single mast cousins, sailors who prefer safety over speed tend to favor ketches for their durability and the peace of mind that comes from having a second mast.

Yawls are closely related to ketches, yet the mizzenmasts are set further back.

Why Do Sailboats Have Two Sails – Final Thoughts

Sailboats have two sails as they allow the sailor to: 

• Enable better maneuverability
• Increase their traveling speed
• Improve the sailboat’s ease of handling

Sailboats with two sails and one mast can be either sloops or cutters.

Bryan is a Las Vegas resident who loves spending his free time out on the water. Boating on Lake Mohave or Lake Havasu is his favorite way to unwind and escape the hustle and bustle of the city. More about Bryan.

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Guide to Understanding Sail Rig Types (with Pictures)

There are a lot of different sail rig types and it can be difficult to remember what's what. So I've come up with a system. Let me explain it in this article.

What are the different types of sail rig? The sail rig is determined by the number of masts and the layout and shape of sails. Most modern ships are fore-and-aft rigged, while old ships are square-rigged. Rigs with one mast are sloops and cutters. Ketches, yawls, brigs, and schooners have two masts. Barques have three masts. Rigs can contain up to seven masts.

'Yeah, that's a gaff brig, and that a Bermuda cutter' - If you don't know what this means (neither did I) and want to know what to call a two-masted ship with a square-rigged mainsail, this article is definitely for you.

On this page:

More info on sail rig types, mast configurations and rig types, rigs with one mast, rigs with two masts, rigs with three masts, related questions.

This article is part 2 of my series on sails and rig types. Part 1 is all about the different types of sails. If you want to know everything there is to know about sails once and for all, I really recommend you read it. It gives a good overview of sail types and is easy to understand.

The Ultimate Guide to Sail Types and Rigs (with Pictures)

First of all, what is a sail rig? A sail rig is the way in which the sails are attached to the mast(s). In other words, it's the setup or configuration of the sailboat. The rig consists of the sail and mast hardware. The sail rig and sail type are both part of the sail plan. We usually use the sail rig type to refer to the type of boat.

Let's start by taking a look at the most commonly used modern sail rigs. Don't worry if you don't exactly understand what's going on. At the end of this article, you'll understand everything about rig types.

The sail rig and sail plan are often used interchangeably. When we talk of the sail rig we usually mean the sail plan . Although they are not quite the same. A sail plan is the set of drawings by the naval architect that shows the different combinations of sails and how they are set up for different weather conditions. For example a light air sail plan, storm sail plan, and the working sail plan (which is used most of the time).

So let's take a look at the three things that make up the sail plan.

The 3 things that make up the sail plan

I want to do a quick recap of my previous article. A sail plan is made up of:

• Mast configuration - refers to the number of masts and where they are placed
• Sail type - refers to the sail shape and functionality
• Rig type - refers to the way these sails are set up on your boat

I'll explore the most common rig types in detail later in this post. I've also added pictures to learn to recognize them more easily. ( Click here to skip to the section with pictures ).

How to recognize the sail plan?

So how do you know what kind of boat you're dealing with? If you want to determine what the rig type of a boat is, you need to look at these three things:

• Check the number of masts, and how they are set up.
• You look at the type of sails used (the shape of the sails, how many there are, and what functionality they have).
• And you have to determine the rig type, which means the way the sails are set up.

Below I'll explain each of these factors in more detail.

The most common rig types on sailboats

To give you an idea of the most-used sail rigs, I'll quickly summarize some sail plans below and mention the three things that make up their sail plan.

• Bermuda sloop - one mast, one mainsail, one headsail, fore-and-aft rigged
• Gaff cutter - one mast, one mainsail, two staysails, fore-and-aft rigged
• Gaff schooner - two-masted (foremast), two mainsails, staysails, fore-and-aft rigged
• Gaff ketch - two-masted (mizzen), two mainsails, staysails, fore-and-aft rigged
• Full-rigged ship or tall ship - three or more masts, mainsail on each mast, staysails, square-rigged

The first word is the shape and rigging of the mainsail. So this is the way the sail is attached to the mast. I'll go into this later on. The second word refers to the mast setup and amount of sails used.

Most sailboats are Bermuda sloops. Gaff-rigged sails are mostly found on older, classic boats. Square-rigged sails are generally not used anymore.

But first I want to discuss the three factors that make up the sail plan in more detail.

Ways to rig sails

There are basically two ways to rig sails:

• From side to side, called Square-rigged sails - the classic pirate sails
• From front to back, called Fore-and-aft rigged sails - the modern sail rig

Almost all boats are fore-and-aft rigged nowadays.

Square sails are good for running downwind, but they're pretty useless when you're on an upwind tack. These sails were used on Viking longships, for example. Their boats were quicker downwind than the boats with fore-and-aft rigged sails, but they didn't handle as well.

The Arabs first used fore-and-aft rigged sails, making them quicker in difficult wind conditions.

Quick recap from part 1: the reason most boats are fore-and-aft rigged today is the increased maneuverability of this configuration. A square-rigged ship is only good for downwind runs, but a fore-and-aft rigged ship can sail close to the wind, using the lift to move forward.

The way the sails are attached to the mast determines the shape of the sail. The square-rigged sails are always attached the same way to the mast. The fore-and-aft rig, however, has a lot of variations.

The three main sail rigs are:

• Bermuda rig - most used - has a three-sided (triangular) mainsail
• Gaff rig - has a four-sided mainsail, the head of the mainsail is guided by a gaff
• Lateen rig - has a three-sided (triangular) mainsail on a long yard

The Bermuda is the most used, the gaff is a bit old-fashioned, and the lateen rig is outdated (about a thousand years). Lateen rigs were used by the Moors. The Bermuda rig is actually based on the Lateen rig (the Dutch got inspired by the Moors).

Other rig types that are not very common anymore are:

• Junk rig - has horizontal battens to control the sail
• Settee rig - Lateen with the front corner cut off
• Crabclaw rig

Mast configuration

Okay, we know the shape of the mainsail. Now it's time to take a look at the mast configuration. The first thing is the number of masts:

• one-masted boats
• two-masted boats
• three-masted boats
• four masts or up
• full or ship-rigged boats - also called 'ships' or 'tall ships'

I've briefly mentioned the one and two mast configurations in part 1 of this article. In this part, I'll also go over the three-masted configurations, and the tall ships as well.

A boat with one mast has a straightforward configuration because there's just one mast. You can choose to carry more sails or less, but that's about it.

A boat with two masts or more gets interesting. When you add a mast, it means you have to decide where to put the extra mast: in front, or in back of the mainmast. You can also choose whether or not the extra mast will carry an extra mainsail. The placement and size of the extra mast are important in determining what kind of boat we're dealing with. So you start by locating the largest mast, which is always the mainmast.

From front to back: the first mast is called the foremast. The middle mast is called the mainmast. And the rear mast is called the mizzenmast.

What is the mizzenmast? The mizzenmast is the aft-most (rear) mast on a sailboat with three or more masts or the mast behind the mainmast on a boat with two masts. The mizzenmast carries the mizzen sail. On a two-masted boat, the mizzenmast is always (slightly) smaller than the mainmast. What is the purpose of the mizzen sail? The mizzen sail provides more sail area and flexibility in sail plan. It can be used as a big wind rudder, helping the sailor to have more control over the stern of the ship. It pushes the stern away from the wind and forces the bow in the opposite way. This may help to bring the bow into the wind when at anchor.

I always look at the number of masts first, because this is the easiest to spot. So to make this stuff more easy to understand, I've divided up the rig types based on the number of masts below.

Why would you want more masts and sail anyways?

Good question. The biggest advantage of two masts compared to one (let's say a ketch compared to a sloop), is that it allows you to use multiple smaller sails to get the same sail area. It also allows for shorter masts.

This means you reduce the stress on the rigging and the masts, which makes the ketch rig safer and less prone to wear and tear. It also doesn't capsize as quickly. So there are a couple of real advantages of a ketch rig over a sloop rig.

In the case of one mast, we look at the number of sails it carries.

Boats with one mast can have either one sail, two sails, or three or more sails.

Most single-masted boats are sloops, which means one mast with two sails (mainsail + headsail). The extra sail increases maneuverability. The mainsail gives you control over the stern, while the headsail gives you control over the bow.

Sailor tip: you steer a boat using its sails, not using its rudder.

The one-masted rigs are:

• Cat - one mast, one sail
• Sloop - one mast, two sails
• Cutter - one mast, three or more sails

The cat is the simplest sail plan and has one mast with one sail. It's easy to handle alone, so it's very popular as a fishing boat. Most (very) small sailboats are catboats, like the Sunfish, and many Laser varieties. But it has a limited sail area and doesn't give you the control and options you have with more sails.

The most common sail plan is the sloop. It has one mast and two sails: the main and headsail. Most sloops have a Bermuda mainsail. It's one of the best racing rigs because it's able to sail very close to the wind (also called 'weatherly'). It's one of the fastest rig types for upwind sailing.

It's a simple sail plan that allows for high performance, and you can sail it short-handed. That's why most sailboats you see today are (Bermuda) sloops.

This rig is also called the Marconi rig, and it was developed by a Dutch Bermudian (or a Bermudian Dutchman) - someone from Holland who lived on Bermuda.

A cutter has three or more sails. Usually, the sail plan looks a lot like the sloop, but it has three headsails instead of one. Naval cutters can carry up to 6 sails.

Cutters have larger sail area, so they are better in light air. The partition of the sail area into more smaller sails give you more control in heavier winds as well. Cutters are considered better for bluewater sailing than sloops (although sloops will do fine also). But the additional sails just give you a bit more to play with.

Two-masted boats can have an extra mast in front or behind the mainmast. If the extra mast is behind (aft of) the mainmast, it's called a mizzenmast . If it's in front of the mainmast, it's called a foremast .

If you look at a boat with two masts and it has a foremast, it's most likely either a schooner or a brig. It's easy to recognize a foremast: the foremast is smaller than the aft mast.

If the aft mast is smaller than the front mast, it is a sail plan with a mizzenmast. That means the extra mast has been placed at the back of the boat. In this case, the front mast isn't the foremast, but the mainmast. Boats with two masts that have a mizzenmast are most likely a yawl or ketch.

The two-masted rigs are:

• Lugger - two masts (mizzen), with lugsail (a cross between gaff rig and lateen rig) on both masts
• Yawl - two masts (mizzen), fore-and-aft rigged on both masts. Main mast is much taller than mizzen. Mizzen without a mainsail.
• Ketch - two masts (mizzen), fore-and-aft rigged on both masts. Main mast with only slightly smaller mizzen. Mizzen has mainsail.
• Schooner - two masts (foremast), generally gaff rig on both masts. Main mast with only slightly smaller foremast. Sometimes build with three masts, up to seven in the age of sail.
• Bilander - two masts (foremast). Has a lateen-rigged mainsail and square-rigged sails on the foremast and topsails.
• Brig - two masts (foremast), partially square-rigged. The main mast carries small lateen-rigged sail.

The yawl has two masts that are fore-and-aft rigged and a mizzenmast. The mizzenmast is much shorter than the mainmast, and it doesn't carry a mainsail. The mizzenmast is located aft of the rudder and is mainly used to increase helm balance.

A ketch has two masts that are fore-and-aft rigged. The extra mast is a mizzenmast. It's nearly as tall as the mainmast and carries a mainsail. Usually, the mainsails of the ketch are gaff-rigged, but there are Bermuda-rigged ketches too. The mizzenmast is located in front of the rudder instead of aft, as on the yawl.

The function of the ketch's mizzen sail is different from that of the yawl. It's actually used to drive the boat forward, and the mizzen sail, together with the headsail, are sufficient to sail the ketch. The mizzen sail on a yawl can't really drive the boat forward.

Schooners have two masts that are fore-and-aft rigged. The extra mast is a foremast which is generally smaller than the mainmast, but it does carry a mainsail. Schooners are also built with a lot more masts, up to seven (not anymore). The schooner's mainsails are generally gaff-rigged.

The schooner is easy to sail but not very fast. It handles easier than a sloop, except for upwind, and it's only because of better technology that sloops are now more popular than the schooner.

The brig has two masts. The foremast is always square-rigged. The mainmast can be square-rigged or is partially square-rigged. Some brigs carry a lateen mainsail on the mainmast, with square-rigged topsails.

Some variations on the brig are:

Brigantine - two masts (foremast), partially square-rigged. Mainmast carries no square-rigged mainsail.

Hermaphrodite brig - also called half brig or schooner brig. Has two masts (foremast), partially square-rigged. Mainmast carries a gaff rig mainsail and topsail, making it half schooner.

Three-masted boats are mostly barques or schooners. Sometimes sail plans with two masts are used with more masts.

The three-masted rigs are:

• Barque - three masts, fore, and mainmast are square-rigged, the mizzenmast is usually gaff-rigged. All masts carry mainsail.
• Barquentine - three masts, foremast is square-rigged, the main and mizzenmast are fore-and-aft rigged. Also called the schooner barque.
• Polacca - three masts, foremast is square-rigged, the main and mizzenmast are lateen-rigged.
• Xebec - three masts, all masts are lateen-rigged.

A barque has three or four masts. The fore and mainmast are square-rigged, and the mizzen fore-and-aft, usually gaff-rigged. Carries a mainsail on each mast, but the mainsail shape differs per mast (square or gaff). Barques were built with up to five masts. Four-masted barques were quite common.

Barques were a good alternative to full-rigged ships because they require a lot fewer sailors. But they were also slower. Very popular rig for ocean crossings, so a great rig for merchants who travel long distances and don't want 30 - 50 sailors to run their ship.

Barquentine

The barquentine usually has three masts. The foremast is square-rigged and the main and mizzenmast fore-and-aft. The rear masts are usually gaff-rigged.

Faster than a barque or a schooner, but the performance is worse than both.

The polacca or polacre rig has three masts with a square-rigged foremast. The main and mizzenmast are lateen-rigged. Beautiful boat to see. Polacca literally means 'Polish' (it's Italian). It was a popular rig type in the Mediterranean in the 17th century. It looks like the xebec, which has three lateen-rigged masts.

Fun fact: polaccas were used by a Dutch sailor-turned-Turkish-pirate (called Murat Reis).

The xebec is a Mediterranean trading ship with three masts. All masts are lateen-rigged. I couldn't find any surviving xebecs, only models and paintings. So I guess this rig is outdated a long time.

A boat with three or more masts that all carry square-rigged sails is called a ship, a tall ship, or a full-rigged ship. So it's at this point that we start calling boats 'ships'. It has nothing to do with size but with the type of rigging.

More sails mean less stress on all of them. These ships use a lot of sails to distribute the forces, which reduces the stress on the rigging and the masts. Square sails mean double the sail area in comparison to triangular sails.

They are quite fast for their size, and they could outrun most sloops and schooners (schooners were relatively a lot heavier). The reason is that tall ships could be a lot longer than sloops, giving them a lot of extra hull speed. Sloops couldn't be as large because there weren't strong enough materials available. Try making a single triangular sail with a sail area of over 500 sq. ft. from linen.

So a lot of smaller sails made sense. You could have a large ship with a good maximum hull speed, without your sails ripping apart with every gust of wind.

But you need A LOT of sailors to sail a tall ship: about 30 sailors in total to ie. reef down sails and operate the ship. That's really a lot.

Tall ships are used nowadays for racing, with the popular tall ship races traveling the world. Every four years I go and check them out when they are at Harlingen (which is very close to where I live).

Check out the amazing ships in this video of the tall ship races last year near my hometown. (The event was organized by friends of mine).

What is the difference between a schooner and a sloop? A schooner has two masts, whereas the sloop only has one. The schooner carries more sails, with a mainsail on both masts. Also, sloops are usually Bermuda-rigged, whereas schooners are usually gaff-rigged. Most schooners also carry one or two additional headsails, in contrast to the single jib of the sloop.

What do you call a two-masted sailboat? A two-masted sailboat is most likely a yawl, ketch, schooner, or brig. To determine which one it is you have to locate the mainmast (the tallest). At the rear: schooner or brig. In front: yawl or ketch. Brigs have a square-rigged foremast, schooners don't. Ketches carry a mainsail on the rear mast; yawls don't.

What is a sloop rig? A sloop rig is a sailboat with one mast and two sails: a mainsail and headsail. It's a simple sail plan that handles well and offers good upwind performance. The sloop rig can be sailed shorthanded and is able to sail very close to the wind, making it very popular. Most recreational sailboats use a sloop rig.

What is the difference between a ketch and a yawl? The most important difference between a ketch and a yawl are the position and height of the mizzenmast. The mizzenmast on a yawl is located aft of the rudder, is shorter than the mainmast and doesn't carry a mainsail. On a ketch, it's nearly as long as the mainmast and carries a mainsail.

There are a wonderful lots of DIY changeability shows on the cable airwaves these days.

Rick the rigger

There are SO many errors on this site it really should be taken down.

First major mistake is to say you are no longer afraid of the sea.

One that truly gets up my nose is the term ‘fully’ rigged ship. It’s a FULL rigged ship!! Your mast names are the wrong way round and just because there may be 3 it doesn’t automatically mean the one in the middle is the main.

I could go on and totally destroy your over inflated but fragile ego but I won’t. All I will say is go learn a lot more before posting.

Shawn Buckles

Thanks for your feedback. If you like to point out anything more specific, please let me know and I will update the articles. I’ve changed fully-rigged to full-rigged ship - which is a typo on my part. I try to be as concise as I can, but, obviously, we all make mistakes every now and then. The great thing about the internet is that we can learn from each other and update our knowledge together.

If you want to write yourself and share your knowledge, please consider applying as a writer for my blog by clicking on the top banner.

Thanks, Shawn

Well, I feel that I’ve learned a bit from this. The information is clear and well laid out. Is it accurate? I can’t see anything at odds with the little I knew before, except that I understood a xebec has a square rigged centre mainmast, such as the Pelican ( https://www.adventureundersail.com/ )

Hi, Shawn, You forgot (failed) to mention another type of rig? The oldest type of rig known and still functions today JUNK RIG!

Why are so many of the comments here negative. I think it is wonderful to share knowledge and learn together. I knew a little about the subject (I’m an Aubrey-Maturin fan!) but still found this clarified some things for me. I can’t comment therefore on the accuracy of the article, but it seems clear to me that the spirit of the author is positive. We owe you some more bonhomme I suggest Shawn.

As they say in the Navy: “BZ” - for a good article.

Been reading S.M. Stirling and wanted to understand the ship types he references. Thank you, very helpful.

This site is an awesome starting point for anyone who would like to get an overview of the subject. I am gratefull to Shawn for sharing - Thanks & Kudos to you! If the negative reviewers want to get a deeper technical knowledge that is accurate to the n-th then go study the appropriate material. Contribute rather than destroy another’s good work. Well done Shawn. Great job!

Good stuff Shawn - very helpful. As a novice, it’s too confusing to figure out in bits and pieces. Thanks for laying it out.

First of all I have to say that Rick ‘the rigger’ is obviously the one with the “over inflated but fragile ego” and I laughed when you suggested he share his knowledge on your blog, well played!

As for the content it’s great, hope to read more soon!

Alec Lowenthal

Shawn, I have a painting of a Spanish vessel, two masted, with. Lateen sails on both masts and a jib. The mainsail is ahead of the main mast (fore) and the other is aft of the mizzen mast. Would this be what you call lugger rig? I have not seen a similar picture. Thanks, Alec.

Thank you for your article I found easy to read and understand, and more importantly remember, which emphasises the well written.. Pity about the negative comments, but love your proactive responses!

This vessel, “SEBASTIAN” out of Garrucha, Almería, España, was painted by Gustave Gillman in 1899.

Sorry, picture not accepted!

Thank you for a very informative article. I sail a bit and am always looking for more knowledge. I like the way you put forth your info and I feel if you can’t say anything positive, then that person should have their own blog or keep their opinions to their-self. I will be looking for more from you. I salute your way of dealing with negative comments.

Thank you for a great intro to sailing boats! I searched different sailboats because I use old sails tp make bags and wanted to learn the difference. Way more than I ever expected. Thanks for all the work put in to teach the rest of us.

Your description of a cutter is lacking, and your illustrations of “cutters” are actually cutter-rigged sloops. On a true cutter, the mast is moved further aft (with more than 40% of the ship forward of the mast). A sloop uses tension in the backstay to tension the luff of the foresail. The cutter can’t do this.

Also, a bermuda-rigged ketch will have a line running from the top of the mainmast to the top of the mizzenmast.

wow great guide to rig types! thanks

Interesting guide, however I am confused about the description of the brig. You say the main mast on a brig can have a lateen sail, but in your picture it looks like a gaff sail to me. How is it a lateen sail?

Hi Shawn, thank you for taking the time to share this information. It is clear and very helpful. I am new to sailing and thinking of buying my own blue water yacht. The information you have supplied is very useful. I still am seeking more information on performance and safety. Please keep up the good work. Best Regards

mickey fanelli

I’m starting to repair a model sailboat used in the lake I have three masts that have long been broken off and the sails need replacement. So my question is there a special relationship between the three masts I do have reminents of where the masts should go. they all broke off the boat along with the sails I can figure out where they go because of the old glue marks but it makes no sense. or does it really matter on a model thank you mickey

Cool, total novice here. I have learnt a lot. Thanks for sharing - the diagrams along with the text make it really easy to understand, especially for a beginner who hasn’t even stepped on a sailing boat.

Daryl Beatt

Thank you. Cleared up quite a few things for me. For example, I was familiar with the names “Xebecs” and “Polaccas” from recent reading about the Barbary War. I had gathered that the two Barbary types were better suited to sailing in the Med, but perhaps they were less able to be adaptable to military uses,(but one might assume that would be ok if one plans to board and fight, as opposed to fight a running gun duel). Specifically, the strangely one sided August 1, 1801 battle between the USS Enterprise under Lt. John Sterett and the Polacca cruiser Tripoli under Admiral Rais Mahomet Rous. On paper both ships seemed nearly equal in size, guns and crew, but pictures of the battle are confusing. While the Enterprise is usually rendered as the familiar schooner, the polacca Tripoli has been pictured in radically different ways. Thus the Wikipedia picture by Hoff in 1878 used to illustrate the Battle shows a Brig design for Tripoli, indicating 77 years later, polaccas were no longer common.

Lee Christiansen

I am curious as to what you would call a modern race boat with a fractional jib,not equipped for full masthead hoist? Thanks Lee

Thanks Guy: The information and pictures really eliminate a lot of the mystery of the terminology and the meanings. Also appreciate the insight of the handling idiosyncrasies “hand” (staff) requirements to manage a vessel for one that has not been on the water much. I long to spend significant time afloat, but have concern about the ability to handle a vessel due to advancing age. The Significant Other prefers to sit (in AC comfort)and be entertained by parties of cruise line employees. Thanks again for the information.

Gordon Smith

Your discussion made no mention of the galleon, a vessel with either square-rigged Fore and Main masts and a shorter lateen-rigged Mizzen, or, on larger galleons, square-rigged Fore and Main masts, with a lateen-rigged Mizzen and a lateen-rigged Bonaventure mast, both shorter than either the Fore or Main masts. Also, it was not uncommon for a galleon to hoist a square-rigged bowsprit topsail in addition to the usual square-rigged spritsail.

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What's that sail for? Generally, I don't know. So I've come up with a system. I'll explain you everything there is to know about sails and rigs in this article.

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The Various Types of Sailboats and Rigs

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The Modern Sloop

The most common type of small-to-midsize sailboat is the sloop. The rig is one mast and two sails. The mainsail is a tall, triangular sail mounted to the mast at its leading edge, with the foot of the sail along the boom, which extends aft from the mast. The sail in front called the jib or sometimes the headsail, mounts on the forestay between the bow and the masthead, with its trailing corner controlled by the jib sheet.

The Bermuda or Marconi Rig

These tall triangular sails are called the Bermuda rig, or sometimes the Marconi rig, named for their development more than two centuries ago in Bermudan boats. Because of the physics of how force is generated by wind blowing past a sail, tall thin sails generally have more power when the boat is sailing into the wind.

Racing Sloop

Gail Oskin / Getty Images

Here is another example of a sloop with a Bermuda rig. This is PUMA Ocean Racing's il Mostro, one of the fastest monohull sailboats in the world, in the 2008/2009 Volvo Ocean Race. The sails are much bigger than found on most cruising sailboats, but the general rig is the same. In both of the sloops shown so far, the jib reaches to the top of the masthead. These are sometimes called masthead sloops.

Fractional Sloop Rig

Ahunt [CC0] / Wikimedia Commons

Here, notice a small racing dinghy with a sloop rig. This is still a Bermuda rig, but the mainsail is proportionally larger and the jib smaller, for ease of handling and maximum power. Note that the top of the jib rises only a fraction of the distance to the masthead. Such a rig is called a fractional sloop.

KenWiedemann / Getty Images

While a sloop always has two sails, a cat-rigged boat generally has only one. The mast is positioned very far forward, almost at the bow, making room for a very long-footed mainsail. The mainsail of a cat rig may have a traditional boom or, as in this boat, a loose-footed mainsail attached at the aft corner to what is called a wishbone boom.

Compared to Bermuda Rigs

A primary advantage of a cat rig is the ease of sail handling, such as not having to deal with jib sheets when tacking. Generally, a cat rig is not considered as powerful as a Bermuda rig, however, and is more rarely used in modern boats.

Cat-Rigged Racing Dinghy

technotr / Getty Images

In this photo, there is another cat rig, which works well on small racing dinghies like this Laser. With a small boat and one sailor, a cat rig has the advantages of being simple to trim and very maneuverable when racing.​

John White Photos / Getty Images

A popular rig for midsize cruising boats is the ketch, which is like a sloop with a second, smaller mast set aft called the mizzenmast. The mizzen sail functions much like a second mainsail. A ketch carries about the same total square footage of sail area as a sloop of the equivalent size.

Make Sail Handling Easy

The primary advantages of a ketch are that each of the sails is usually somewhat smaller than on a sloop of equivalent size, making sail handling easier. Smaller sails are lighter, easier to hoist and trim and smaller to stow. Having three sails also allows for more flexible sail combinations. For example, with the wind at an intensity that a sloop might have to double-reef the main to reduce sail area, a ketch may sail very well under just jib and mizzen. This is popularly called sailing under “jib and jigger”—the jigger being an old square-rigger term for the aft-most mast flying a triangular sail.

While a ketch offers these advantages to cruisers, they may also be more expensive because of the added mast and sail. The sloop rig is also considered faster and is therefore used almost exclusively in racing sailboats.

Public Domain

A yawl is very similar to a ketch. The mizzenmast is usually smaller and sets farther aft, behind the rudder post, while in a ketch the mizzenmast is forward of the rudder post. Aside from this technical difference, the yawl and ketch rigs are similar and have similar advantages and disadvantages.

Tomás Fano [ CC BY-SA 2.0 ], via Wikimedia Commons

A typical schooner has two masts, and sometimes more, but the masts are positioned more forward in the boat. Unlike in a ketch or yawl, the forward mast is smaller than the aft mast (or sometimes the same size). One or more jibs may fly forward of the foremast.

Traditional Schooners

While some modern schooners may use triangular, Bermuda-like sails on one or both masts, traditional schooners like the one shown here have gaff-rigged sails. At the top of the sail is a short spar called the gaff, which allows the sail to extend back along a fourth side, gaining size over a triangular sail of the same height.

Gaff-rigged schooners are still seen in many areas and are well loved for their historic appearance and sweeping lines, but they are seldom used anymore for private cruising. The gaff rig is not as efficient as the Bermuda rig, and the rig is more complicated and requires more crew for sail handling.

Schooner With Topsail and Flying Jibs

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Above is another gaff-rigged schooner that is using a topsail and several flying jibs. Tacking or gybing a complicated sail plan like this takes a lot of crew and expertise.

Square-Rigged Tall Ship

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In this illustration, notice a large three-masted square-rigger flying five tiers of square sails, several headsails, and a mizzen sail. Although this is a modern ship, one of many still used around the world for sail training and passenger cruise ships, the rig is essentially unchanged from centuries ago. Columbus, Magellan, and the other early sea explorers sailed in square-riggers.

Generating Power

Remarkably efficient sailing downwind or well off the wind, square sails do not generate power from their leading edge as in the Bermuda rig, which has become predominant in modern times. Thus, square-riggers generally do not sail upwind. It was due to this limitation that the great trade wind sailing routes around the world were developed centuries ago.

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