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Definition of catamaran

Illustration of catamaran, examples of catamaran in a sentence.

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'catamaran.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Tamil kaṭṭumaram , from kaṭṭu to tie + maram tree, wood

1673, in the meaning defined above

Dictionary Entries Near catamaran

Cite this entry.

“Catamaran.” Merriam-Webster.com Dictionary , Merriam-Webster, https://www.merriam-webster.com/dictionary/catamaran. Accessed 21 Mar. 2024.

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Kids definition of catamaran, more from merriam-webster on catamaran.

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Britannica.com: Encyclopedia article about catamaran

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What Is A Catamaran Sailboat? (And What It Looks Like)

Last Updated by

Daniel Wade

August 30, 2022

Catamarans are increasingly popular for sailing and commercial use, but what sets them apart from monohulls and other multihulls?

A catamaran is a twin-hull boat with two equally-sized hulls placed side by side. They’re powered by engines, sails, or both—and they’re known for efficiency and speed. Catamarans are the most common kind of multihull boat.

In this article, we’ll go over the characteristics of catamarans and how to differentiate them from other types of boats. Additionally, we’ll cover the advantages and disadvantages of catamarans and compare them to trimarans and monohulls. We’ll also go over the most common types of catamarans and their uses.

We sourced the information in this article from marine design guides, boat identification resources, and the online boating community.

Table of contents

‍ How to Spot a Catamaran

Spotting a catamaran is easy. Simply look at the hulls and count them. Catamarans have two hulls side by side and a relatively large gap between them where you can see light on the other end. Catamarans are distinct from trimarans, which have an additional hull between the two outer hulls.

How do Catamarans Work?

The principle behind the catamaran is simple. You can think of catamarans like cars and monohulls like motorcycles. Catamarans distribute their weight between hulls on either side, whereas monohulls utilize only one hull.

Evidently, cars are much more difficult to tip over and can hold much more weight. Additionally, cars are wider, as they have much more contact with the road. Catamarans work in a similar way, as they have a wide stance and contact with the surface on both sides.

Obviously, that isn’t the most precise comparison. But the basic principle is the same, and catamarans have a few notable benefits over monohulls.

Catamaran Vs Monohull

Catamarans are easy to distinguish from monohulls. A monohull is just a regular old boat with a single hull. The vast majority of boats and ships are monohulls. Catamarans have two hulls, which are usually sleek and narrow.

Here are some comparisons of catamarans and monohulls, along with the advantages twin-hull designs have over most single hull types.

Benefits of Catamarans

Catamarans have numerous benefits. The first is speed. Catamarans produce less drag than monohulls and thus can achieve excessive speeds both under sail and power. They don’t need to plane like monohulls to achieve these high speeds, and they use less fuel.

Catamarans are also much more stable than monohulls. They have a wide stance and shallow draft, and many waves and swells can travel between the hulls instead of below them. This effectively reduces an entire axis of movement and prevents catamarans from rolling excessively.

Drawbacks of Catamarans

Catamarans aren’t advantageous in every way, or else we wouldn’t bother building monohulls. The disadvantages of catamarans limit their use to niche commercial applications and high-end yachts. But what are the drawbacks of a twin-hull design?

Sailing catamarans don’t follow many of the traditional boat handling rules and characteristics that sailors pass down for generations. Some, such as hull speed limitations, are good to do away with—while others, such as responsiveness, are not.

Catamarans aren’t as quick to the helm or responsive as monohulls. There are some exceptions to this rule, but for the most part, you’ll get a lot more feedback from a single-hull vessel. Additionally, the large section of deck between the hulls of a catamaran is prone to pounding in rough seas, which is loud and uncomfortable.

Catamarans can sometimes be twice the width of an equivalent monohull sailboat, which can increase mooring fees and limit docking options.

The final major drawback of catamarans is a consequence of their stability. Traditional full-keel monohull sailboats have a very low center of gravity, which makes them roll in heavy seas but ensures a recovery.

Catamarans have a higher center of gravity, and they can’t right themselves after a knockdown. And though catamarans are less likely to roll, a severe list on a multihull is a much more serious concern than on a ballasted monohull.

Catamaran Vs Trimaran

Catamarans and trimarans are often lumped together, but they have very different design and performance specifications. Trimarans have three hulls, whereas catamarans have two.

Trimarans look a lot like catamarans from the side, but a quick glance at the bow or stern can set them apart. Trimarans are faster than catamarans, as they distribute their weight across three hulls instead of two. This helps them stay centered and reduces interference from pitching and rolling.

Catamarans are fast, but they lose out to trimarans when going head to head. However, catamarans are much less expensive to build and maintain and often have roomier cabins due to their larger hulls.

Types of Catamarans

There are numerous types of catamarans, and their uses vary widely. The catamaran is one of the oldest and most useful hull types, and some variants have been used for thousands of years. Here are the most common kinds of catamaran boats and their uses.

Sailing Catamaran

Sailing catamarans are probably what you think of when you hear the name. Sailing catamarans are sailboats with two identical hulls connected by a center deck. The largest sailing catamarans are spacious and stable vessels that are capable of serious offshore sailing.

Sailing catamarans have a number of notable advantages over monohulls. Monohulls, which are traditional sailboats with a single hull, are limited by a simple concept called hull speed. As the bow and stern wave of a monohull intersect, they cause drag which limits the top speed of the boat.

Catamarans are not bound by hull speed limitations, as they have two hulls. Catamarans can go twice or even three times as fast as similar monohulls and achieve excellent travel times.

Catamarans are also more stable than monohulls, as their wide stance and shallow draft reduce the effect of rough water. They don’t heel, as the force of the wind is counteracted by the double hulls. Additionally, modern sailing catamarans can ‘wave pierce’ by cutting through swells instead of riding over them.

Sailing catamarans come in many shapes and sizes. Small sailing catamarans, such as those used in races and regattas, are known for their speed and relative stability compared to light racing monohulls. Sometimes, they feature a smaller second hull for stability—these are called outriggers.

Sailing catamarans have spacious interiors thanks to the large cockpit between the hulls. This cockpit usually contains cooking and eating spaces, a place to sit, and a hallway between the hulls. The hulls usually contain living quarters and often mirror each other.

Power Catamarans

Power catamarans have an even greater variety than sailing catamarans. These vessels are used for everything from party platforms to ferries and patrol boats.

Power catamarans are a recent development, as engineers and marine architects now realize they have numerous hydrodynamic advantages over other hull types.

Catamarans are much more efficient than other hull types, as they have less drag relative to their size. Additionally, you can build a much larger catamaran with less material. This makes them popular for car and rail ferries, as builders can construct a very wide vessel with two small hulls rather than a narrower vessel with a large single hull.

Military and Commercial Catamarans

Even the military has found a use for the catamaran hull shape. The Spearhead class EPF is an expeditionary fast transport vessel designed for carrying capacity and speed. It has two sharp hulls and a huge cargo capacity.

The Spearhead class EPF is 337 feet long, which is about the same length as a WW2 escort destroyer. Yet despite having a similar length and displacement, these catamarans can travel more than twice as fast—43 knots, or nearly 50 miles per hour. Their great speed is a direct consequence of their catamaran hull type.

Power catamarans are also used as patrol and utility boats on a much smaller scale, with either outboard or inboard motors. The State of Texas uses catamarans to patrol shallow rivers and lakes. Texas Game Wardens utilize state-of-the-art aluminum catamaran patrol boats, which are fast enough to outrun most fishing boats.

There’s another form of power catamaran that you may not have considered. Pontoon boats are technically catamarans, and they’re enormously popular on lakes and rivers throughout the country. Pontoon boats aren’t known for speed, but they’re a great platform for a fun and comfortable outing.

Catamaran Houseboats

The final common type of power catamaran is the two-hulled houseboat. Houseboats don’t always use the catamaran hull type, but it’s common enough that most major manufacturers offer it as an option.

Catamaran houseboats have a few notable advantages over monohull designs. For one, they’re easier to build—especially when pontoons are chosen. Additionally, they’re better suited for navigating shallow water. These vessels can support more weight across their two hulls, offer increased stability, and they’re also efficient.

Why Aren’t Catamarans More Common?

With all the advantages listed in this article to consider, it may seem strange that the use of catamarans is still somewhat limited. At the end of the day, it comes down to economics—as monohull boats and ships are simply cheaper to build.

Additionally, catamarans have some distinct limitations. Monohulls have lots of storage space in their hulls and can carry thousands of tons of cargo safely in all weather conditions. Catamarans lack this space and low center of gravity, so they’re not ideal for transporting cargo past a certain point.

Additionally, monohulls work, and many people are reluctant to experiment with new designs when old designs work just fine. This rule applies to both large and small boats.

A large monohull sailboat can be constructed at low cost from stock plans and reliably sail almost anywhere. Very little complex structural engineering is involved, and looser tolerances reduce cost and maintenance requirements.

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A complete catamaran guide.

• Post Written By: Boater Jer
• Published: January 26, 2020
• Updated: November 27, 2020

Disclaimer: You might notice that we recommend products in some articles. We may earn a commission for referring you if you click the link and buy a product.

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There you are, out on the water when a strange craft approaches.  Is it a sailboat? It sure looks like one until it turns to face you.  That’s when you notice this boat doesn’t have just one hull. It has two hulls and it’s called a catamaran.

Catamarans are unique, and highly stable watercraft.  We’ll explore all the ins and outs of sailing the waters in one of these weird, and awesome multi-hulled craft.  Join me as we explore the wild world of sailing catamarans.

A History Of The Catamaran

It is believed that the first people to use a catamaran design were those living in Australasia.

The succession of boat design in this region was actually very interesting.  The beginning of boats in the area was simple, albeit conventional rafts. These were fashioned from logs strewn together with plant fiber lashings such as those formed using bamboo fiber.  

Catamaran Evolution

The conventional raft gave way to a minimal raft.  This design was basically a conventional raft with two cross beams added in the form of logs.  These would be eventually hollowed out to improve buoyancy.

The next step in the evolution of boats in the Australasian region was the double canoe.  This proved to be the first real catamarans.  

After some time, the form evolved further into the asymmetrical double canoe design.  In this design, one canoe was large and the other attached canoe was smaller.

The asymmetrical design quickly evolved into the single-outrigger boat like the one shown in the photo below.

The final stage of the evolution of the catamaran in the region was to gain a second outrigger.  This in effect created the trimaran with the single central hull and dual outriggers.

Eye Witness Accounts Of Catamarans

In 1697, William Dampier wrote of witnessing a type of seafaring vessel off the coast of Coromandel.  He noted how the locals called the type of boat a catamaran. He also noted that it had multiple hulls (logs) and that they were small vessels that the person operating would have to hang partway into the water, straddling the hull (log).

The name catamaran came from the Tamil.  And yet, it was easily applied by the European visitors to the two hulled sailing vessels that sped across the water in the region.

Although Dampier may have described the catamaran in the 1690s, the type of boat was actually used as early as the 5th century by the Tamil Chola dynasty.  They used boats to move their troops from one island to another. Using this design of boat allowed them to travel heavy, travel quickly and was partially responsible for the conquering of neighboring Burma, Malaysia, and Indonesia.

Building A Boat – Basics Of Catamaran Construction

A boat is usually thought of as being a single-hulled vessel that travels along the surface of the water.  It can have multiple types, shapes, and designs of the hull. However, it is often only thought of as having a single hull.  But, what if it had two hulls? Would that be like taking two separate boats, and making a raft over both of them? In essence, that is exactly what a catamaran is:  two boats made into one.

Advantages Of Multiple Hulls

• More stability than a monohull
• Wide supporting base allows for larger sails than monohull craft of the same length
• Hull does not require the deep-running keel of a standard monohull sailboat
• Less hull drag in the water than a monohull
• Less power required to drive a catamaran forward than a monohull boat

Disadvantages Of Multiple Hulls 

• Due to multiple hulls, construction is more expensive than a monohull design
• Catamaran speed relies on lightweight materials to make a lightweight craft.  This also drives up the cost of construction.
• Extra engineering requirements for multi-hull craft also increase the cost of construction.

Conclusion?  Well, it looks to me like everything about catamarans points towards superiority over monohulls in nearly every way.  But, you get what you pay for. I think the same thing likely applies to cars too. For instance, I have a performance car that cost me about 10k more than the equivalent non-sports car within the same class. 

Yet to drive the vehicle, it performs so much better than the normal version of the car, it really speaks volumes to the difference between a common vehicle, and a performance one.

Speaking of performance vehicles, let’s take a look now at the different kinds and uses of a catamaran.

Catamaran Types

Commercial catamarans – ferries.

One of the most common uses for a catamaran is the commercial use of the vehicle design when it comes to ferries.  This is likely due to the wide, flat deck possibilities of a catamaran versus a monohulled boat. Not only that, but the catamaran is also a much more stable bodied vessel.  This again makes it a superior design for transporting larger land vessels like trucks and so forth. They can easily drive on the ferry without fear of the ferry tipping over.

Some ferries are designed for taking vehicles, like the one you might find in the city of Toronto.  Where it transports cars from the mainland to Toronto Island. Others are designed specifically with the sole purpose of transporting people. I took a look at one such ferry that operates in Germany.  Take a look at the following case study.

Commercial Use Case Study – The Ferry

The FRS Helgoline is a ferry catamaran operating out of Flensburg, Germany, close to the Danish border.

According to the ferry company’s website, the ferry runs using four main engines which are run to a capacity of 12,182 hp combined.  This blasts this ferry at a speed of 35 knots or 65 km/hour. This is equivalent to 40 miles per hour. That’s pretty good considering the size and weight of the ship body this catamaran can carry.

Speaking of capacity, the ship can carry 680 passengers. At 56.4 meters long (185 feet) by 14 meters wide (45.9 feet), that’s a decent passenger capacity. 

Catamaran Passenger Capacity Versus Monohull Boat Passenger Capacity 

The general rule for calculating passenger capacity for a boat is as follows.

Length x Width / 15 = Passenger Capacity

Therefore, the FRS Helgoline should have a calculated capacity calculated as follows.

185 x 45.9 / 15 = 566  

But it actually has a capacity of 680 which is a 20% increase in capacity over a standard monohull.

For comparison, let’s look at a superyacht.  A 48.5m (159 feet) long by 10.7m (35 feet) beam (width of the boat) Palmer Johnson Supersport 48 (valued at about $28.5 million dollars) should have a capacity calculated as follows.

159 x 35 / 15 = 371

In short, 26 feet of difference in length equates to 309 fewer passengers.  It is almost half of the capacity of the catamaran at 26 feet longer length.

Photo courtesy of https://sysyachtsales.com/

Commercial Catamarans – Service Vehicles

Although Catamarans are typically used as ferries due to their stability and ability to carry wide loads on their flat decks, there are many different service catamarans out there as well.  From a support vessel to a crew transfer or search and rescue, catamarans are a solid and stable platform to build a ship on.

This is the Ardea which is a 20 meter (65.6 feet) catamaran to be used for crew transport and as a support ship.  This ship was built by the Echo Marine Group and delivered to Western Australia in early 2019. This particular vessel is in the service of the Cape Preston Sino Iron Project.  

Catamarans are used all around the world, for a variety of tasks, not just ferries or support craft.

Commercial Catamarans – Cruise Lines

Now these are the catamarans we all want to be aboard, aren’t they?  Due to the wide stance, these ships can feature massive halls and wide-open interior areas.  These ships are stable, and some would say even more stable and safer than monohull design ships.  

There are many cruise ship catamarans in use today around the world.  Some of the more ‘famous’ catamaran cruises are those which investigate the Galapagos Islands.  There are several high-end, small fleet, cruise lines operating to the Galapagos which utilize catamaran design vessels as their primary ship type. 

These ships can be extremely comfortable and stable and often offer some reprieve to those who may otherwise feel seasick. It won’t stop the feeling, but the more stable the hull, the less the boat rocks around.

Military Catamarans

Catamarans make excellent military transport vessels.  They are stable and the potential to have a large, flat and wide deck for transporting land craft, troops or acting as a landing pad for vertical take-off aerial craft.  The stability of the two hulls makes the vessel an excellent candidate for military use, and thus it is used for said purpose.

As you can clearly see in the image of the USNS Spearhead, the rear of the vessel has a moveable ramp that can be used for loading and unloading land vehicles.  The interior bay of the craft is visible in the image as well, a large area for storage of vehicles, supplies and more. The crane arm on the back of the ship also shows how it is a versatile craft, set up to act as an excellent support craft with a helicopter landing pad and ample storage and freight capacity.

Recreational Catamarans

Catamaran Personal WatercraftThe wind is in your hair, the warm spray from the hull cutting over the edge of each wave as you skip over the water.  That is life, let me tell you. Personal watercraft have come a long way over the years and the small one, two, three and four-person catamarans have come a long way as well. 

Depending on the options, you can get a small one or two-person catamaran for as little as $1500 new.  That might be an inflatable though. There are some very nice, rigid hull designed catamarans for 1-4 people that range from $3500 to $15000.  And these are basically open, personal watercraft like that shown in the image below.

Using a small catamaran can be quite challenging to learn at first.  Sailing is not for the faint of heart. It requires skill, technique, knowledge of the wind and sea, and a bit of hard work.  But it can be fun, rewarding and a great way to catch some sun and fresh air out on the water. It’s a relatively GREEN sport as well.   Given the use of sails over gas-powered motors that is.

‘Sailing Cats’ – Sailing Catamarans – Yacht & Luxury Class

Here’s where we get into the dreamy boats of the rich and famous.  I priced out a small 43’ luxury Leopard 40 sailing catamaran. Even before I added any extras at all, the base price was $399,000 USD.  I imagine if I added a few of the multiple extras available, and some tax, freight and that sort of thing, I’m easily in half a million dollars.  And that’s the smallest base model.

There are all kinds of luxury catamaran shipbuilders across the world.  From Asia to Europe and The Americas, it seems any major boating country has at least one company building luxury catamarans.  It’s weird that you don’t see more of them on the water though, don’t you think?

Being sailing vessels, these luxury cats require some training in sailing before you get behind the wheel.  And considering the price point, I would definitely want to be at least a semi-decent sailor with some good few years experience under my belt before I would comfortable at the helm of a half-million-dollar sailing cat.  It’s all relative I suppose. I imagine a billionaire might bat an eye at the prospect of wrecking a half-million-dollar boat. But to me, and most of you reading this, that’s likely a lot of money.

‘Power Cats’ – Powered Catamarans

The powered catamaran is one of my favorite boats.  They have sort of a muscle car appearance with the wide and often tall front end of the boats.  I find it to be reminiscent of a large air intake on the front hood of a rally race car like the Subaru WRX, for instance.  These boats are fast, they are stable and handle very well. Catamarans are often considered the boat of choice for long sea voyages due to their stability.  

A powered catamaran will definitely cost more than a powered monohull boat of the same length.  Why? Well, the powered catamaran has one crucial downside. That is, it needs two engines. One for each of the two hulls.  Otherwise, it’s off balance for propulsion. These two engines or motors have to be in sync with each other or again, the propulsion will be off-balance.  Because they have two motors, they have double the maintenance when it comes to maintaining the propulsion system.

More components also means a greater chance of things breaking down.  In essence, it doubles the chances of the ship having a motor break down. The saving grace is that should one motor break, they have a backup, even if it does mean very unbalanced propulsion.  In contrast, a monohull vessel of the same length may only have half the chance of motor failure due to only having one motor, but if that one motor breaks, then what? Call for help, that’s what.  A cat would have a struggling chance to get itself back to port. A monohull would be dead in the water unless it was carrying spare parts or another motor onboard somewhere.

Catamaran Frequently Asked Questions

What is a catamaran cruise.

A catamaran cruise is simply a cruise on a dual hull design boat.  Often used for river cruises, the catamaran which is used as cruise ships are often considerably smaller than their giant monohulled counterparts.

What is the purpose of a catamaran?

A catamaran is a design for a boat that utilizes two hulls.  Due to the flat, platform-like-potential for the deck of the boat, the catamaran is often purposed with transporting materials, vehicles, and people.  For instance, catamarans are quite often used as ferries.

Is catamaran safe?

Catamaran are very safe water craft.   The design of riding on two hulls separated by a gap in between, in essence is like giving a car a double-wide wheel base.  The wider the stance, the more stable the craft, from side to side anyway. And if the length of the boat is proportional to the width, then it becomes an extremely stable craft.  That is why catamarans are often considered the best to be used for long voyages. Yes, catamaran are safe.

What is the difference between a catamaran and a sailboat?

A traditional sailboat is a deep, monohull vessel that has at least one mast extending high into the air above the deck to hold sails.  A catamaran refers to the design of a dual-hull boat and really has nothing to do with sails. Although, catamaran do make excellent sailing boats as well, they are quite capable of acting as power boats and do not require sails if they have the correct amount of powered motors to propel them.  Sailboats, although also able to be powered if a motor is provided, are traditionally monohull and wind-powered exclusively.

Do catamarans have small interiors?

The size of an interior cabin on a boat is typically proportional to the size of the boat itself.  If a catamaran has above-deck cabins, they will likely be able to be of a larger design than those you would find on deck of a monohull boat.  This is because a catamaran has a much wider footprint than a monohull boat of the same length. This extra width would allow for larger on deck cabins.  

How much does a catamaran cost?

A personal watercraft (1-2 person) inflatable catamaran will run you anywhere from $1500-$12000 USD, depending on the quality and features.  The rigid hull catamarans of the same size start at about $4500 USD.

A small cabin cruiser type of catamaran will typically start at about $60000 for a small base model and the price just goes up and up depending on size and features.

For Instance, a 40’, 3 cabin with 1 washroom cat will cost you about $500,000 USD for the base model.  They are considerably more expensive that a monohull of the same length. However, the trade-off is greater stability and a smoother, more comfortable ride.

Is a catamaran more work to maintain?

Technically yes.  Due to having two hulls and if powered, two motors and likely also water jets, this means you have double the oil changes of a boat that would have a single motor.  Once you get past the basic engine and hull maintenance, a catamaran is not that much more work than a monohull ship of the same length.  

The trouble with catamarans in terms of maintenance, is that once they reach a certain length, the width becomes more than a standard lane on the road.  That being said, if you ever need to transport the boat via land, it can be quite the challenge. Especially if you need to pay to have a police escort for an extra-wide trailer.  And special licensing might be involved as well.

What is the difference between a catamaran and a trimaran?

A catamaran is a dual hull boat.  In other words, it has two hulls. A trimaran has three hulls.  

Is a catamaran considered a yacht?

According to Oxford dictionary, a yacht is a medium-sized sailboat equipped for cruising or racing.  A catamaran, on the other hand, is a boat with two hulls. Therefore, a catamaran can most certainly also be a yacht.  And likewise, if a yacht has two hulls, then it is a catamaran as well.

Can you get seasick on a catamaran?

Seasickness occurs when a person feels nauseous from the swaying motion of a rocking ship.  These feelings may be lessened on a catamaran, due to their extra stability. However, a catamaran may be slightly more stable than a monohull of the same length, but it is still a boat.  And it will still make someone who experiences seasickness continue to feel the ill effects.

Are catamarans more stable in rough seas?

Catamarans are known to be more stable than monohull ships of the same length.  This is why catamarans are often the ship type of choice for long sea voyages due to their stability.

Why do catamarans capsize?

Catamarans are not known for capsizing.  The larger vessels that is anyway. But, it does happen from time to time.  Catamarans are known for their stability, so typically if a capsize event should occur, it is typical for them to be extreme circumstances.  

Personal watercraft catamarans are a different story though.  These are in fact known for tipping over. Not because they are less stable than their monohull counterparts of the same length.  But instead, because they are able to go considerably faster than monohull personal watercraft of the same length (not including powered craft though).  This is due to the sailing cats being able to have a larger sail than a small monohull sailboat of the same length.

Due to the extra sail, they are able to travel faster than monohull sailboats of the same length.  This allows them to whip around on the water and at higher speeds, whipping your cat about quick can easily send it over sideways. Extra speed means fast turns carry momentum in the direction of travel and that extra speed equates to tipping over if turned too fast.  To sum up, they capsize due to user error or extreme events.

Which is safer, a catamaran or a monohull?

Due to the extra stability of having a wider footprint than a monohull, a catamaran of the same length is the safer vessel.

Are catamarans safer than sailboats?

The same rule applies to stability versus the length of the hull.  A cat will always be the more stable length for length. However, due to their ability to go much faster than a monohull sailboat, this kind of cancels out some of the added safety due to stability.  With that in mind, they may just be about the same but there is one generalization we can make when comparing the safety of catamarans vs sailboats: At the same speed, and of equal length, sailing or power catamaran will be safer than a monohull sailboat.

How fast can catamarans go?

The speed a catamaran can go is entirely dependent upon the hull design, weight of the vessel, the strength of propulsion (be it wind or powered) and so on.  The general rule is that in terms of sailing cats vs monohull sailboats, a cat of equal length can typically go faster than a sailboat.  

In terms of powered cats vs powerboats, a powered catamaran will typically require less energy to move forward than a monohull of the same sort of hull design (but monohull of course) and thus a cat should, in theory, be able to go faster than a monohull when both are using propulsion that is equal in power.

Bibliography

• Wikipedia – Catamarans
• Mahdi, Waruno (1999). “The Dispersal of Austronesian boat forms in the Indian Ocean”. In Blench, Roger; Spriggs, Matthew (eds.). Archaeology and Language III: Artefacts languages, and texts . One World Archaeology. 34 . Routledge. pp. 144–179. ISBN 0415100542 .
• Wikipedia – Spearhead -class expeditionary fast transport
• https://www.tiki-toki.com/timeline/entry/169516/Origin-of-the-catamaran/#vars!panel=1620923!
• https://www.austal.com/ships/passenger-express-56
• https://www.adventure-life.com/galapagos/galapagos-catamaran-cruises

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Meaning of catamaran in English

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• cabin cruiser
• dragon boat
• rubber dinghy
• As soon as the boat anchored, a catamaran put out, and brought Charlie and his followers to shore.  
• Next morning we were visited by a party of natives from the neighbouring island, consisting of six men in a canoe, and one on a catamaran or raft.  
• Soon we were surrounded with catamarans and canoes, with three or four natives in each.  
• The horses and cows were taken on a species of catamaran, or large raft, that is much used in those mild seas, and which sail reasonably well a little off the wind, and not very badly on.  
• When we reached the lagoon, a catamaran with three natives on it came off to us.  

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Definition of catamaran noun from the Oxford Advanced Learner's Dictionary

What Are Catamarans And Their History?

Catamarans are boats with two connected hulls that are joined by a bridge. Because they are faster, more stable, and capable of carrying larger cargo than their monohull counterparts, catamarans are growing in popularity.

As a result, designers and owners have greater freedom to accommodate space needs in terms of size and usefulness than they would with single-hulled vessels.

The name catamaran came from the Tamil word “kattumaram” which basically meant “logs which were bound together”. These traditional watercraft were basically used on the south coast of India and Srilanka. They were dated back to as early as the 5th century when they were used to transport troops from one island to another.

Let us get into more details to learn more about the different types of catamarans and their functions.

What are the different types of catamarans?

Catamarans are mainly divided into two categories: sailing and power catamarans, however, both categories can be split into smaller groups by their size and use.

Sailing catamarans

These types of catamarans are mainly propelled with help of sails. The sails act as wings with which the vessel moves forward with the help of wind energy. The sailing catamarans have advanced significantly in recent years in terms of both design and performance attributes. Sailing catamarans are further subdivided based on their dimensions and functions and are classified into,

Small, mini, or sports catamarans

Depending on the size, these are also known as leisure catamarans and can carry a load of 6 persons on average. You’ve definitely seen some of them speeding through your local beach waters on hot, sunny weekends; some of them are made to be driven by one person. Those designed for use in sports have a trapeze that enables one to hike out and serve as a counterweight.

Small-day sailing cats are well-liked because they offer a secure and straightforward learning environment, and you can see fleets of them in resorts where guests with little to no sailing experience utilize them. These little cats are often made of roto-molded plastic or fiberglass, and as they frequently lack auxiliary motors, sails are their only means of propulsion

A trampoline that spans the two hulls of the sports catamarans acts as a bridge so that individuals can move from one to the other without falling into the water. They may be launched and landed from a beach as opposed to a dock because of their modest size. They have a rotating mast and a mainsail with full-length battens.

Cruising Catamarans

In the worlds of long-distance cruising and bareboat chartering, larger cruising cats have dominated. These are more stable than their monohull competitors, allowing them to securely transport people across continents. These are more stable than their monohull competitors, allowing them to securely transport people across continents.

For maneuverability, charter cats frequently have two engines—one in each hull—as well as a mast that holds a mainsail and at least one headsail.

Nowadays, cruising catamarans are more widely available than monohulls at bareboat charter firms with tropical bases, and those numbers are rising in places like the Mediterranean.

Power catamarans

Power catamarans, often known as “multi-hull powerboats” or “power cats,” are vessels without masts or sails but with larger and more powerful engines. They can be the most perfect choice for your first boat if you enjoy offshore fishing or other water sports. You get a great balance of performance, stability, and maneuverability with these powerboats. Power cats come in a range of different sizes and shapes. In terms of dimensions and functions, they are also divided into,

Center console fishing catamarans

The fishing industry is flooded with smaller power cat brands, while bareboat charter and cruise platforms are seeing the emergence of larger ones. The multi-hull performance boat frequently has a center console driver layout.  They can reach higher top speeds thanks to their higher horsepower, but these cats also need to be strengthened hulls to support the weight and power of these engines.

When used for fishing, normally lesser than 50 ft, there are several options available for live wells, rod holders, gear storage, and built-in coolers for both fish and beverages. Depending on the length and design elements of the boat, certain consoles may locate closer to the bow or aft of the vessel.

Offshore powerboat racing catamarans

Offshore powerboat racing is the aquatic equivalent of off-road auto racing. Since its inception in the late 1960s, offshore racing has changed drastically.

Though V-bottom powerboat classes still exist, twin-engine catamarans with top speeds of 170 MPH in the most powerful classes dominate the sport.

The offshore race course may be the most dynamic setting in all of the motorsports because of the constant fluctuations in a swell, wind, tide, current, and other factors. The track might abruptly change from being friendly to antagonistic.

These boats are designed and built such that they are both lightweight but extremely strong using the most advanced materials like carbon fiber and Kevlar . Manufacturing methods such as infusion are adopted to make sure the properties of the materials are not lost during the production stages.

Motor yachts and ferries

For their roominess and speed, catamaran designs have also become popular among motor yachts and commercial passenger ferries. These cruise-centric yachts offer homelike livability for avid travelers, are fuel efficient, and are fairly intuitive to run.

Motor yacht catamarans have been designed with larger living spaces in mind, as well as more outdoor recreation places. The huge fly bridges provide additional space for relaxing and socializing, and electric boat davits make lifting the dinghy simple. Daily tasks like cooking can be done with ease because catamarans don’t heel.

Why Is There A Shift In Trend From Monohulls To Catamarans?

Recently, more and more often you can find catamarans in the harbors of large cities and small resorts. It can be unequivocally argued that catamarans are gaining popularity among both beginners and experienced sailors and even celebrities. But what makes them gain this popularity?

Catamarans In Terms Of Function And Utility

The enormous interior space expansion can provide the owners considerably more freedom to select furnishings without regard to size limits and more room for additional appliances like washers and dryers, which can make life on board much easier.

Due to their broader decks and roomier interiors, catamarans are frequently employed as party boats. The deck can accommodate more people without giving them the impression of being crammed into a small space.

In terms of storage, catamarans offer more alternatives than monohulls because both hulls can serve a variety of purposes, increasing the vessel’s overall capacity as well.

Catamarans are typically utilized as party boats since they have bigger deck spaces and greater room for movement. The deck can also accommodate more people without giving them the impression of being confined in a small space.

If any equipment breaks down, there is always a backup. For instance, if one of the engines on the port hull fails, we can always use the starboard engine to re-enter landfall. Likewise, if a generator breaks down, there is always a second generator that can be utilized as a backup.

Catamarans In Terms Of Performance And Stability

Due to the narrow hulls of catamarans, which serve to reduce drag forces, they frequently outperform monohulls. On performance power catamarans, the area in between the two hulls known as the “Tunnel” is built in a similar way to an aerofoil so that it behaves like a wing, boosting the aerodynamic lift forces and enhancing the overall effectiveness and top-end speeds of the craft.

Due to their stronger lift forces and lower water friction than monohulls, catamarans typically have a better fuel economy. This is because the strain placed on the engines as a whole is reduced, resulting in less fuel being used.

In terms of roll stability, catamarans are often more stable than monohulls. This offers them an advantage in terms of comfort and the ability to carry out various activities onboard the vessel with ease, as well as lowering the possibility of passengers falling on board. Because they are less likely to make passengers seasick, catamarans are typically used as ferries or passenger ships.

Catamarans provide a more comfortable ride whether they are in shallow water, deep water, or at anchor; they have a decreased chance of keeling over or capsizing in heavy winds.

Also, catamarans have a much lower draft when compared to their mono hull counterpart’s allowing them to easily ply over shallower waters.

What Are The Potential Drawbacks Of Catamarans?

Catamarans have a few minor limitations, much like any other kind of boat:

Finding dock space is frequently challenging and expensive for catamarans because they take up more room.

Power and sailing cats can both smash into the bridge deck when heading to the weather because of the way that they are built.

Additionally, because they have two hulls instead of one, sailing cats can’t necessarily aim as high into the wind as monohulls can.

Overall, a catamaran allows for greater speeds, but at the expense of much-reduced vessel control. Knowing when to accelerate and when to slow down is difficult when sailing a catamaran. A catamaran can be readily overturned in sea conditions that a monohull can maneuver securely in.

Finally, while it may be alluring to add more weight in a catamaran due to the space it provides, doing so will almost certainly degrade the performance of either power or sailing cat—something that is less of an issue on their monohull counterparts.

Catamarans are a growing trend due to their better advantages over their monohull counterparts. Despite having an ancient fundamental design, catamarans are a modern boating alternative that can be used by any boater for both commercial and leisure uses.

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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Catamaran Boats: Types, Uses & Activities

Let’s look at some of the types of catamarans and their best uses.

Sailing Catamarans

Sailing catamarans have made great strides over the past several decades. Small daysailing cats are popular because they provide a safe and simple learning platform and you’ll find fleets of them in resorts where they’re used by people with very little sailing experience. These types of small cats are usually made of roto-molded plastic or fiberglass and they typically don’t have auxiliary engines so their sole source of propulsion is sails.

Larger sailing cats have taken over the world of distance cruising and bareboat chartering . Nearly all tropically-based bareboat charter companies offer more sailing catamarans today than monohulls and those numbers are also growing in destinations such as the Mediterranean. Typically, charter cats have two engines, one in each hull, to maneuver as well as a mast that supports a mainsail and at least one headsail.

Explore Sailing Catamarans & Sailboats

Power Catamarans

Power catamarans, often referred to as "multi-hull powerboats" or "power cats," have larger engines than their sailing cousins and no masts or sails. Their bigger motors give them higher top speeds but these cats also need reinforced hulls to handle the weight and power of these engines. Other than pontoon boats (which arguably are also power cats), motorized cats are the fastest growing segment of the boating market.

Power cats come in various shapes and sizes. Numerous smaller power cat brands are marketed for fishing while larger ones are popping up in bareboat charter and as cruising platforms. Many commercial passenger ferries have also turned to the catamaran design for their spaciousness and speed.

Explore Power Catamarans

Advantages of Catamaran Boats

There are some inherent advantages of boats with multiple hulls, which include:

• More deck and interior space per foot than monohulls. A catamaran has about 1.2 times the space of a monohull. In other words, a 40-foot cat should have the deck and interior space of a 50-foot monohull. Cats also have more interior space with up to four cabins even in a vessel under 40 feet in length. These large cabins usually provide easier berth access and they have hull windows with opening ports for better ventilation and light even in the staterooms, which are usually more separated for privacy.
• Due to their design with two hulls set wide apart, cats enjoy greater stability under way and at rest in rolly anchorages . Unlike a monohull that can heel under sail or roll when powered, cats stay level, which makes them safer and easier for people and pets to maneuver on the flat deck. Some say cats have an easier motion than monohulls and tend to induce less seasickness.
• With twin engines, cats’ propellers are set wide apart so these boats have excellent maneuverability. Cats can venture into shallower waters too – especially sailing cats that don’t have deep keels. Because cats don’t drag a massive keel through the water, they’re also on average 20-30 percent more fuel-efficient even with two engines.
• Larger, more sophisticated power and sailing catamarans have a natural redundancy built into their equipment inventory, which translates to comfort and safety. For example, if a fresh water pump fails in one hull, there’s usually another to provide water for washing up. If one engine fails or one propeller spins off, there’s another to get the vessel to homeport safely. There’s also more room for the installation of additional systems like generators, watermakers, battery banks, and more.

Drawbacks of Catamaran Boats

Like any boat type, there are a few small drawbacks when it comes to catamarans:

• Catamarans take up more space so it’s often difficult and expensive to find dock space.
• Due to their design, both power and sailing cats can also slam the bridge deck into oncoming waves when going to weather.
• Additionally, sailing cats don’t necessarily sail as well upwind as monohulls because with two hulls, they simply can’t point as high into the wind.
• Finally, it may be tempting to load up a catamaran due to the space it offers but a sure way to damage a power or sailing cat’s performance is to overload them or have uneven weight distribution—something, which is less of a problem on their monohull counterparts.

Catamaran Boats FAQs

Whether used for daysailing, world cruising, chartering or fishing, boats with two hulls are growing in acceptance and appeal. The basic design may be hundreds of years old but today’s updated designs make catamarans a viable option for any boater.

Are catamarans more expensive than monohulls?

Purchasing or chartering a catamaran is usually more expensive than a monohull since there are more accessories and even more fiberglass construction to pay for. Over time, cost of ownership can be higher too since there are two hulls to polish and wax and more equipment to service or replace. It’s also more expensive to haul out a catamaran for bottom work.

What is the typical draft of a catamaran?

Draft (depth below waterline) depends on the size and type of cat. Small daysailing cats can draw mere inches but with a large cruising cat, it may be 3-4 feet. Some cats have dagger boards that are used to improve upwind performance. With the boards down, a cat can draw 10 feet or more but these boards may be lifted to allow access to shallow water.

Can catamarans be raced?

Catamarans make fine racers as has been proven by the America’s Cup contenders. There are also one-design classes in the smaller, open designs.

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Where Did Catamaran Originate? (A Look Into Its History)

Catamarans have been around for centuries, but where did they come from? For those who are curious about the history and origins of catamarans, this article will explore the history of catamaran, from its beginnings to its current uses.

From the meaning of the word “catamaran” to its use in racing and cruising, this article will look into the history of catamarans and how it has shaped the sport today.

We will also look at how catamarans have been used for fishing, and how they are still used for this purpose today.

Finally, we will explore the ways in which catamarans are used for racing and cruising, and the ways in which they have become popular vessels for these activities.

Join us as we explore the fascinating history of catamarans!

Table of Contents

Short Answer

Catamarans are thought to have originated in the South Pacific region, likely in the islands of Polynesia.

The earliest catamarans are believed to have been constructed by the Austronesians around 1500 to 1000 BC.

These vessels were then spread to other cultures by trading and other means of communication.

Today, catamarans are used in various ways around the world, including for commercial and recreational purposes.

The Origins of Catamaran

Catamarans have a long and rich history that dates back to the Indian subcontinent.

The word catamaran is derived from the Tamil language of South India and literally means tied wood, referring to how two logs were tied together to form the original catamaran design.

This sturdy craft was originally used for transportation and fishing, but it eventually made its way to the West in the late 18th century as a recreational sailing vessel.

Today, catamarans are used for a variety of purposes, ranging from racing and cruising to fishing.

They are renowned for their stability, maneuverability, and speed, and they are popular with both recreational and professional sailors alike.

Catamarans are especially adept at handling choppy waters, as their design allows them to handle waves better than most other vessels.

This makes them an ideal choice for sailing in rough or windy conditions.

Catamarans are also praised for their spacious layout, with their two hulls providing more room than other types of vessels.

This makes them ideal for larger groups, as they can comfortably accommodate more people than a traditional sailboat.

Additionally, catamarans are renowned for their efficiency, as their design allows them to move through the water faster and more efficiently than other boats.

Overall, catamarans have come a long way from their humble origins in the Indian subcontinent.

Today, they are a versatile and popular choice for sailing enthusiasts of all levels, and their history is a testament to their durability and longevity.

The Meaning of the Word Catamaran

The word catamaran is derived from the Tamil language of South India, where it literally means “tied wood”.

This refers to the traditional design of catamarans, which typically consists of two logs or planks of wood tied together with rope.

The original catamarans were used for transportation and fishing, and their widespread use in the Indian subcontinent has been documented since at least the 3rd century BCE.

Today, the term catamaran is often used to describe a wide range of multi-hulled vessels, from recreational sailing vessels to racing boats and even commercial vessels.

While all of these vessels share the same basic design, the modern catamaran has evolved over the centuries and now includes variations such as trimarans, trimarans, and even pontoon boats.

The development of the modern catamaran began in the late 18th century, when the first catamarans appeared in the West.

These vessels were developed for recreational sailing, and over time they have become increasingly popular for use in racing, cruising, and fishing.

Catamarans are well known for their stability and speed, and they are now used in a variety of applications, from leisure sailing to commercial shipping.

Ultimately, the word catamaran is derived from the Tamil language and it literally means “tied wood”.

Over the centuries, the catamaran has evolved and today it is used for everything from racing to cruising to fishing, and is renowned for its stability and speed.

Catamarans in the West

The first recorded appearance of catamarans in the Western world dates back to the late 18th century.

At the time, the vessels were brought to the Caribbean from the Indian subcontinent by traders and explorers.

They were quickly adopted by sailors for their speed and stability, as well as their ability to navigate shallow waters.

Catamarans were also popular among fishermen, as they could carry more cargo and could easily navigate shallow waters.

The vessels quickly spread across the globe, with catamarans becoming a popular recreational sailing vessel in the 19th century.

The vessels were a common sight in the Caribbean, and they eventually spread to other parts of the world, including the United States and Europe.

By the mid-20th century, catamarans had become a popular recreational sailing vessel, with many people using them for racing, cruising, and fishing.

Today, catamarans are used for a wide variety of activities, from recreational sailing to fishing and racing.

They are renowned for their stability and speed, and they are still popular among recreational sailors of all skill levels.

Catamarans continue to be used for transportation and fishing in the Indian subcontinent, where they originated, and they are still a popular sight in many parts of the world.

Uses of Catamarans

Catamarans have long been used for transportation and fishing in the Indian subcontinent, where the word “catamaran” originates from the Tamil language, meaning “tied wood.” This origin refers to the traditional design of tying two logs together to form the original catamaran.

Today, catamarans are used for a variety of purposes, from recreational sailing to racing, cruising, and fishing.

Catamarans are renowned for their stability and speed, making them ideal for traversing large bodies of water quickly.

They provide a stable platform for activities, such as fishing and diving, and offer increased living space when compared to conventional sailboats.

The increased stability of a catamaran also makes them ideal for use in areas with high winds and choppy waters, as they can handle the conditions better than traditional sailboats.

In addition to transportation and fishing, catamarans are also used for a variety of recreational activities.

They are popular among sailors due to their speed and maneuverability, and can be used for racing, cruising, and day-sailing.

Catamarans are also popular among families and large groups, as they provide ample space for socializing and relaxing.

Catamarans have come a long way since their humble beginnings in the Indian subcontinent, and are now an integral part of the sailing world.

With their stability, speed, and ample living space, catamarans are a great choice for both recreational and commercial use.

Racing with Catamarans

Catamarans have become a popular choice for racing enthusiasts all over the world.

This is due to their remarkable stability and speed, which make them ideal for competitive sailing.

Catamarans are able to cut through the water more efficiently than traditional sailing vessels, and their light weight makes them easier to maneuver.

In addition, their dual-hulls provide more surface area, allowing them to catch more wind and push through the water faster.

This makes them perfect for racing, as they can easily navigate tight turns and sail upwind faster than any other type of boat.

Catamarans are also well-suited for long-distance sailing, as they typically have more space than traditional vessels.

This extra space allows for more storage and greater comfort, making it easier for a crew to stay out on the water for longer periods of time.

Catamarans also have a relatively flat bottom, which reduces drag and helps make them faster than traditional boats.

Today, catamarans are used in a variety of sailing competitions, including the Americas Cup and the Volvo Ocean Race.

These races typically involve multiple catamarans, making them exciting spectacles to watch.

Catamarans have also become popular in recreational sailing, and many people use them for pleasure cruises and fishing trips.

No matter how it’s used, the catamaran has become an icon in the sailing world.

Its unique advantages have made it a favorite of both racers and recreational sailors alike, and its history makes it an interesting topic to explore.

Cruising with Catamarans

Catamarans are well-known for their stability and speed, making them a popular choice for recreational sailing.

Whether youre looking for a day of leisurely sailing or a thrilling race, catamarans offer an enjoyable experience that can be tailored to your individual needs.

Catamarans are especially suited to cruising, as they offer plenty of space for passengers and cargo, and their hulls dont require much maintenance.

Catamarans have a unique design that allows them to cruise efficiently and smoothly.

Their two hulls make them more stable than other boats, and their flat decks provide plenty of room for passengers to move around.

The spacious cabins provide plenty of space for sleeping, dining, and relaxing, and the cockpit is designed to make sailing easy and enjoyable.

Catamarans are also known for their speed and agility.

Their hulls are designed to cut through the water with minimal resistance, allowing them to reach speeds of up to 20 knots.

Their shallow draft also makes them ideal for shallow waters, allowing you to explore more areas than with a traditional monohull boat.

In addition to their speed and stability, catamarans are also known for their safety.

Their wide beam makes them less likely to capsize, and their two hulls help to spread the load, making them less susceptible to sinking than other vessels.

Catamarans also have a lower center of gravity, making them less likely to tip over in rough seas.

Whether youre looking for a leisurely day of sailing or a thrilling race, catamarans are an excellent choice for cruising.

With their stability, speed, and safety, they offer an enjoyable and accessible way to explore the open waters.

Fishing with Catamarans

The use of catamarans for fishing is nothing new, with the vessels first being used for the purpose in the Indian subcontinent thousands of years ago.

In the Tamil language of South India, the word catamaran comes from two words that literally mean tied wood, referring to how two logs were tied together to form the original catamaran design.

It was these vessels that were used for fishing, with two logs forming the base for the frame and a platform built on top for the fishermen to stand on.

These catamarans were incredibly versatile vessels, allowing fishermen to access shallow waters and maneuver quickly and easily to chase schools of fish.

They were also incredibly stable, and could carry a large amount of equipment and supplies, which made them ideal for long-distance fishing trips.

Today, modern catamarans are still used for fishing, with the vessels’ stable and maneuverable design still providing an ideal platform for fishermen.

Modern catamarans are made from a variety of materials, including fiberglass and aluminum, and are available in a range of sizes to suit different needs.

Catamarans are also popular for recreational fishing, with the vessels providing a great platform for anglers to enjoy their sport.

The popularity of catamarans for fishing is a testament to the versatility and effectiveness of these vessels.

With their stable and maneuverable design, their ability to access shallow waters, and their capacity to carry a large amount of equipment and supplies, they remain a popular choice for those looking to take to the water in pursuit of their catch.

Final Thoughts

Catamarans have come a long way since their humble beginnings in the Indian subcontinent.

From their simple design of two logs tied together, to today’s modern catamarans used for racing, cruising, and fishing, it’s amazing to think about all the ways these vessels have evolved.

Now that you know the history behind the word catamaran, why not take a sail and experience the thrill of these incredible vessels for yourself?

James Frami

At the age of 15, he and four other friends from his neighborhood constructed their first boat. He has been sailing for almost 30 years and has a wealth of knowledge that he wants to share with others.

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Learning a new skill can sometimes be time-consuming, and learning to sail also means learning a new language with tons and tons of new words that, in the beginning, makes no sense at all.

Some of the words you will read about in this article stem from the early days of sailing. Some are only a decade old; in this article, I have tried to compile all the basic terminology that I believe a beginner needs if he or she wants to understand sailing and catamarans.

Feel free to use this article as a resource and come back to it when you want to look something up or just to learn more!

Table of Contents

Main sections on a catamaran

• Hulls; are what separates a cat from other sailboats, a catamaran has two hulls, a trimaran three, and a regular sailboat, aka monohull, has one. The hull is the part of the sailboat which makes it float and to where all other things are attached. The hulls are usually divided into sections, such as usable and non-usable area. An example of a usable area is the engine room.
• Cockpit ; is from where the boat is maneuvered; it is to here that all halyards, sheets, etc. go. The cockpit contains navigation and steering equipment and is from where the sails, rudder, and engine are controlled.
• Deck; is the top part(roof) of a catamaran covering the hulls and bridge deck. The deck is made hard enough to walk on. To the deck, attaches lifelines and other equipment.
• Sugarscoops ; are the aftmost part that gets their name from their scoop-shaped appearance; this is where the deck/cockpit meets that water and usually encompasses a stair or ladder for easy access depending on the size of the boat.
• Cabin; is basically any area on the inside of the boat that is protected from the weather and is made to offer the crew space to rest, eat, and hangout. Inside the cabin, you will find berths (beds), a galley (kitchen), and sometimes specialized areas for repairs or storage.
• Bridgedeck; connects the two hulls; the inside is the cabin, the top part is the deck, and the entire unit is called the bridge deck. Bridge deck clearance, the bridge deck’s height above the water, is an important factor on a catamaran since a too small clearance will create excess noise and vibrations and fatigue not only the crew but also the boat.

Main areas on a catamaran

Bow (front).

Nothing complicated here; the bow is just a nautical term for the foremost part of your boat. This is where the waves and the sea first meet the hull and depending on the type of boat, the bow(s) can be shaped differently.

Center (Middle)

The part between the bow and the stern is rarely called the center part( middle) of a boat; more common is to speak about the specific area situated within the middle part of the vessel, such as the cabin or the mast.

• Cockpit; as mentioned above, here you will (usually) find everything that you need to maneuver and navigate the boat, such as a compass, GPS, sheets, steering wheel, and throttles for the engines. Some boats may not be set up this way and require you to move around the boat to access certain controls.

Cabin (inside of the boat)

The boat’s interior is where you will find everything that is made for the crew’s enjoyment; it is a place to eat, sleep, rest up, and hide away from nasty weather.

• Berths; is a bed; sailors need to sleep too!
• Galley ; is another name for kitchen, usually set up in a very primitive way with a gas stove on a stabilized platform to ensure your food won’t get tossed around.
• Navstation; or navigation station, is a place, usually with a table, chair, and equipment for planning and logging a journey.

Stern (Back)

Stern is the name for the rearmost part of the boat; there is no clear definition as to where the stern stops and other parts begin, so it is something that the crew will have to figure out on their own through good communication.

Communicating directions on a sailboat

Not only will you have to know the different names of different areas on the boat, but it will also be essential to communicate clearly in what direction something is happening, for example, in a situation where you, the captain, want the crew to observe in a specific direction or pick up a piece of gear somewhere on the boat.

Communication on a sailboat is vital when you want to sail safely and efficiently; here, I have listed the words or phrases used to communicate a direction.

• Forward; easy as it sounds, it is the same direction as where the bows are pointing. When giving directions towards or beyond the bow, you will use the word “forward” for example; the fender is located forward of the mast.
• Aft ; is the behind the boat. When you are giving directions towards the stern, you will use the word “aft”; for example, the cockpit is located aft of the mast.
• Port ; this will be your left side. Fun fact, in the good old days, you would always dock with the port on your left side; hence port is the left side. If you ever forget which one is which, “port” has 4 letters and so has the word”left”!
• Starboard ; is your right side!

Types of sails

Sails come in very different shapes and sizes and are a science in itself; in this article, I will focus on the mainsail and three common types of staysail.

• Mainsail; is, per definition, the sail attached to the mast; its sideways movements are controlled by the boom. When the mainsail is triangular in shape, as on most modern sailboats, it is called a Bermuda rig. Most mainsail uses something called battens.
• Staysail; mainly comes in two versions, a staysail that does not overlap the mainsail is called a jib. A staysail that is larger and thus overlaps the mainsail is called a genoa.
• Spinnaker ; is a big balloon-like sail that replaces the jib when sailing downwind.

Parts of a sail

• Luff; the front part of the sail, is connected to the mast through a rail system which makes it possible to hoist or reef.
• Leech; the back part of the sail.
• Foot; the bottom part that reaches from the clew to the tack.
• Clew; back bottom corner.
• Tack; is the front bottom corner (remember “tacking”?).
• Head; is the top triangle of the sail and this is where the mainsail halyard attaches.
• Battens; are pieces of flexible material sewn into the mainsail to increase its aerodynamic shape. Battens can be full length or partial length.

Standing rigging

Everything that keeps the sails and mast upright are parts of the standing rigging; it is comprised of wires, cables, and lightweight metal structures.

• Forestay; usually a metal wire running from the top of the mast to the bow, is sometimes combined with an inner forestay that connects to the mast at a lower point. If the forestay attaches to the top of the mast, the setup is called a masthead rig; if it attaches lower, it is called a fractional rig.
• Backstay ; same as the forestay but attaches to the stern; most catamarans do not employ a backstay system but instead moves the side stays aft.
• Shroud ; much like the forestay but stabilizes the mast sideways and runs from the top to the port or starboard side. Spreaders are used to change the angle of the wire against the mast and better support the mast.
• Sidestay ; connects to the mast below the shrouds and is not pushed outwards with spreaders. On a catamaran, these attach aft of the mast to eliminate the need for a backstay; this makes it possible for a fully battened mainsail with a large roach.
• Jumpers; are used on a fractional rig with diamond shrouds to add structural integrity to the mast without adding excess weight.
• Bowsprit; is a pole amidship at the bow that allows for separation of the tacks (foremost, lower part of the sail) for increasing sail efficiency when using two headsails.

Other stabilizing parts

• Spreaders; act to lessen the angle between the shrouds and the mast; a wider angle will result in forces acting sideways (stabilizing) instead of up and down (bending). This increases stability and decreases the risk of unwanted bending of the mast.

Running rigging

The running rigging on a catamaran is any piece of equipment used to control the shape of the sails, including what is needed to raise them.

• Sheet; are the ropes (or wire, cables, etc.) that connect to the clew of a sail; on a catamaran, it connects to the staysail (genoa or jib, depending on the shape).
• Mainsheet ; is the rope that makes it possible to change the mainsail’s angle; the mainsail can only move in a port to starboard direction(right and left) and not up and down.
• Staysail sheet ; is called after whatever type of sail it is connected to, i.e., jib sheet or genoa sheet. Worth notice is that since the staysail operates on both sides of the catamaran (depending on if your tacking or gybing), it is connected with two ropes, one for the port side and one for the starboard side.
• Halyards ; are the ropes that connect to the top of a sail and make hoisting (or raising) possible. Halyards have different names depending on what sail they are raising, such as Mainsail halyard or jib halyard. Not to be confused with sheets that act upon the sail once they are already hoisted. If the staysail is using a roller furling, then “hosting” is done differently.
• Furling line; is used together with a roller furling and makes it possible to spool up the sail on the forestay instead of raising and lowering. This makes for a faster and easier way to reduce sail area.
• Reefing lines; reefing is when you lower parts of your sail to reduce the sail area and reduce the boat’s power and speed; reefing lines are put through holes in the mainsail and attach to the boom.
• Boom vang; is connected between the boom and deck; it is used to change the mainsail’s shape by pulling downward on the boom. (not very common on Catamarans)

In this category, we will look at the hulls and some of the vital parts that attach to them under the waterline.

• Hulls; differ in their shapes depending on the boat’s purpose, a racing cat would have narrower hulls to reduce drag, and a cruising cat wider hulls to encompass more storage.
• Rudder; is what changes the direction of the boat. When water passes around the rudders(two on a catamaran), it creates a “pushing force” that makes the boat turn. The rudder is connected to a steering wheel or a tiller at the cockpit through chains and linkage.
• Centerboard and daggerboards ; are sorts of keels that can be raised or lowered to attain certain sailing characteristics. When the keel is up, drag is lower, and so is the draft (how deep the boat sticks in the water). A small draft makes it possible to travel in very shallow waters. The difference between a daggerboard and a centerboard is that a centerboard swivels into place, and a daggerboard is pulled straight up.
• Mini-keel; is just what it sounds like; it is a keel but very small (a few inches deep) and has no ballast.
• Crossbeam ; is a multihull-only feature and keeps the two hulls from moving in relation to each other. If the crossbeam is damaged or nonexistent, the bridge deck is the only thing that keeps the hulls in place. This will increase wear and sooner or later lead to cracks, or even worse, separation of hull and bridge deck.

Most catamarans have two engines, one on each hull aft the stern; usually, they are internal with only the propeller in the water. The other option, which is cheaper and most often found on smaller boats, is to have one outboard engine placed amidship (middle).

• Inboard ; engines are situated in a compartment inside the boat at the stern. On an inboard engine, the propeller and the shaft are the only parts outside the hull. Sometimes the prop shaft (propeller shaft) is replaced by a sail drive.
• Outboard ; is a standalone engine usually mounted on the bridge deck amidship(if only one is used) or mounted at the sterns when used in pairs. They are linked together with pushing rods and wires so it can be manipulated from the cockpit.
• Saildrive ; is a type of gearbox that is quieter and vibrates less than a regular propeller and shaft setup.
• Propeller and shaft; are the most common and cheapest way to propel your boat. It is basically just a watertight axel that sticks out of the hull, and at the end of it, you’ll find the propeller.

There are so many pieces of gear aboard a catamaran that an all-encompassing article would probably fill up the entire internet. Below I have listed the most common equipment that you will most likely encounter on any sailboat.

• Winches; makes handling lines and ropes much easier. Instead of pulling them with your bare hands, you loop them around your winch and use the handle to crank. Winches come in mechanical style or electrical style.
• Anchors ; is basically just a big hook made to stick to the bottom of the sea. Anchors have different shapes and weights depending not only on the seabed but also on the boat’s weight and size.
• Navigation ; compass, GPS, and maps are all vital pieces of equipment making your trip safe.
• Cleats ; is any equipment that is made to fasten a rope. Cleats come in different configurations; jam, cam, rope clutch, or the most common horn cleat.
• Block ; is a device that can be used in pairs as a pulley (to reduce the force needed to lift something) or on its own to reduce the friction of a rope when the rope can not be drawn in a straight line.

Owner of CatamaranFreedom.com. A minimalist that has lived in a caravan in Sweden, 35ft Monohull in the Bahamas, and right now in his self-built Van. He just started the next adventure, to circumnavigate the world on a Catamaran!

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What are the parts of a catamaran called?

• Post author By Richard
• Post date September 28, 2020
• No Comments on What are the parts of a catamaran called?

This article is a dictionary of sorts of common terms used whether slang or professional among catamaran sailors.

balsa cored (adj.) – description of a type of building technique common on catamaran used for weight saving purposes. End grain balsa is sandwiched between two layers of fiberglass to stiffen, lighten, and insulate the hull and deck of many catamarans. Usually balsa coring is discussed in terms of concerns about water logged or “wet” coring material which is a significant expensive as well as a common issue especially as catamarans get older.

beach platform (n.) – a type of platform at the back of catamaran in particular the Voyage 440. The platform runs the whole back width between the swim platforms and function as a place behind the cockpit combing to layout, fish, and dangle your feet.

beachable (adj.) – describing a class of catamaran which can safely be run aground and mooring on a sandy bottom often a beach. The hull is constructed so that the design can stay upright and support its own weight when the tide goes out.

breakaway skeg (n.) – an underwater appendage of some catamarans including some Leopard and Outremer models which protects the rudders and breaks away in the case of an impact whether in a grounding situation or underwater debris.

bridge clearance (n.) – also known as air draft. The height from the water level to the tip of the mast. Should include the height all the way to the tip most antenna. Heights provided by manufacturers often underestimate because of the antenna. A key number is 65 feet which in the United States is the limiting clearance for fixed bridges on the Intracoastal waterway. Some owners cut down their masts to get under this limit. Many manufacturers specifically design around the 65 foot limit although with catamarans this is difficult as they tend to have taller masts than other sailboats and smaller headsails for the same waterline length.

bridgedeck clearance (n.) – distance between the center section of catamaran where salon is aka the bridgedeck and the water. Common focus is if the catamaran “slaps” which means in rough seas waves come up and pound against the bottom of the hull. Higher bridgedeck clearance is preferred and considered a bluewater characteristic while low bridgedeck clearance is a common concern. A good way to measure is by extending a measuring tape from behind the cockpit to the waterline and a normal rule of thumb number is two feet.

charter version (adj.) – catamaran built for the charter trade usually Moorings or Dream Yacht Charters which has additional cabins and heads. Usually this means four cabins and four heads. This layout is ideal for charter but often private owners prefer a more luxurious master hull giving them a three cabin and two head layout.

companionway (n.) – the main opening to access the interior of the catamaran. This may be a single hatch like door for example on Mantas or large sliding doors which fold up above the cockpit like on Seawind catamarans. A key design interest for builders and owners is the connection and flow between the cockpit where the most time is spent while onboard and the galley and salon areas.

condomaran (n.) – derogative term towards space focused, performance challenged catamarans such as a Lagoon, Leopard, or Fountaine Pajot.

cored above waterline (adj.) – a description of a common build technique where to lessen water intrusion into balsa coring, that sandwich is not carried below the water line. The term is a bit deceptive as usually the coring does go farther than what most owners would think and often below the waterline although not all the way to the bottom of the hull.

crew quarters (n.) – a pretty minimal and harsh accommodations area on catamarans forward in a bow where the captain and crew are supposed to sleep and live when a catamaran is captain chartered. Often on used catamarans becomes an excellent storage area. An unlivable marvel of a cabin that is suggestive of suffering.

cross beam (n.) – beam usually metal that is forward most and the headsail attaches to. Keeps the two hulls structurally joined at the bow.

cutter (adj.) – a rare type of sailboat where there are two headsails and the mast is well aft. Easily confused with a cutter rigged sloop. See definition for sloop cutter.

daggerboards (n.) – boards used to help windward performance and common on performance catamarans like Catanas while not used on charter catamarans like Lagoons and Leopards. Helps the catamaran head further upwind and make less leeway.

davits (n.) – a critical item on a catamaran which holds and supports the dinghy behind the cockpit. Many different arrangements are common. The davits are operated using a line or multiple lines to lower the dinghy into and raise out of the water for security from getting stolen at anchor or for safety offshore. A common concern of the ocean going sailor is monitoring and making sure if rough seas that the dinghy is tight and secure.

emergency hatch (n.) – a hatch at the bottom of the boat usually under the salon or steps downward into one of the hulls which becomes an emergency escape hatch if the catamaran flips and goes turtle. Required safety feature that hopefully no sailor needs to use. Also can be used to fish from in calm water. Can be a source of leaks or come dangerously loose and cause drama offshore.

family version (n.) – a charter layout of a used catamaran that is preferable for families that usually want at least four cabins to accommodate three or more children. The best type of catamaran!

flat top sail (n.) – a high tech fancy sail with a flat top. Expensive and not as common although becoming more common. Maximizes sail area.

flybridge (n.) – helm above the cockpit common on some popular charter catamarans like the Lagoon 440 or Lagoon 50. Design allows great visibility from aloft but also roughly exposes the captain and can uncomfortably separate the owner-captain from his friends and family.

flying ahull (n.) – when one hull lifts off the water and a catamaran sails only with one hull in the water. Not a good sign for almost any catamaran even performance catamaran. Likely followed by flipping and mayday on cruising catamarans.

four heads (n.) – number of heads on many catamaran layouts preferred for charter. Each guest has a cabin and head, so that no one must share heads during their week together. Usually a negative for private ownership even for families that prefer four cabins as more heads means more problems and less space for other accommodations.

french built (adj.) – denotes the catamaran was built in France. Suggests a more performance focus like Catana or lighter production built like Lagoon. Definitely an aesthetic focus on fast striking lines.

forward cockpit (adj.) – a cockpit in front of the salon area usually accessed by a forward facing companionway door. Made famous by the Leopard 44. Some sailors question usefulness or durability in heavy seas of a large opening on the front side of a catamaran.

galley down (adj.) – kitchen area down in one of the hulls. Associated with older designs or designs seeking weight advantage of lower center of gravity such as Antares 44. Uncommon in more recent catamarans and unheard of for charter catamarans as galley down is inconvenient for four guests for sleeping an food access.

galley up (adj.) – Common for most modern catamarans. Improves flow from cockpit and helm to kitchen as well as separation of shared living areas from private cabin areas.

hard top (adj.) – solid glass top to protect guests in cockpit from sun exposure as well as give a platform above for sail handling or diving from into water. Also a sunbathing area or area for solar panels.

ICW friendly (adj.) – catamaran with rig height below 65 feet to go under fixed bridges along United States eastern seaboard.

IO drive (n.) – a rare engine and drive combination as seen on Gemini 105 MC catamarans where a single diesel engine is centerline and there is an outdrive mounted on a hinged support.

ketch (adj.) – very unusual rig configuration on a catamaran with two masts and the second mast aka mizzen mast being shorter than the main forward mast.

outboard (n.) – gas engine that mounts to a stern or inside a swim platform and includes both the motor and drive. Less expensive and easier to replace yet less durable and less safe offshore. Common on smaller catamarans under 40 feet. Can come in twin configurations or a single centerline configuration. Also a separate small horsepower outboard is usually the power for the dinghy.

owner version (adj.) – usually less common version of a production catamaran where the layout is optimized for private use not charter. These models were usually never chartered and command a premium price on the used market both because of the lower wear from private ownership and the more comfortable layout. Typically in the 40 foot range which consists of the majortiy of catamarans, this means three cabins and two heads with one hull using the missing cabin and head space for a larger head and cabin and maybe an office or lounge area.

performance catamaran (n.) – catamaran with daggerboards which is geared towards more minimal accommodations and faster, lighter performance with a more athletic crew. Rarely chartered.

production catamaran (n.) – charter type catamarans with a focus on space and cabins and low prices. Large numbers built and send to Caribbean to be bareboated for 5 years.

raked mast (n.) – a mast tilted backwards common on catamarans as compromise between performance and accommodations. Dean catamarans are a common brand known for noticeable rake.

saildrive (n.) – a type of drive common on most newer catamarans which helps maximize space and minimize drag as well as being cheaper to build. The engines are in lockers in the swim platforms instead of under the aft berths. There are maintenance issues such as increased difficulty in changing oil and underwater seals which commonly deteriorate and let raw water into and emulsify the oil.

salon (n.) – area inside the catamaran above the bridgedeck which is usually common area of inside helm, large lounge and settee, galley on galley up designs.

sloop (n.) – the most common sail arrangement which consists of a large mainsail and single headsail. The mast is well forward at the front of the salon.

sloop cutter (n.) – a less common sail arrangement of a sloop with the mast forward but two headsails.

snubber (n.) – a rope tied between the two hulls at the bow which hangs downward and has a shackle which is hooked into the anchor chain to take the load of the anchor off the windlass when deployed.

solid foredeck (n.) – a type of design where instead of tramplolines the deck is composed of solid glass. Weight is a concern and this arrangement is less common normally seen on Privileges. Allows for a more solid lounge area and additional storage on deck.

solid glass (n.) – referring to a type of catamarans usually older which does not have coring material in either the hull or deck or both. Weight is an issue and this type of catamaran is slower but the solid glass makes it also impenetrable to water intrusion a common and expensive problem on most catamarans. Examples include Catalac or PDQ catamarans.

south african built (adj.) describing a catamaran built in the second most common exporting country. These catamarans are tended to be though of as stronger and more bluewater capable than French built catamarans. Most common example is Robertson & Caine’s Leopard line of catamarans which are sold mostly to Moorings for charter.

stem (n.) – leading tips of the hulls. Often get banged up from running into things and have gelcoat and paint repairs.

tiller (n.) – a type of steering system where a long piece of wood or carbon fiber is attached directly to the rudder. Outremer is an example of a catamarans with tillers. Typically these are performance oriented catamarans and the tiller allows the helmsperson better feel of the sailing performance. The helm positioning also exposes the driver more to the elements.

trampolines (n.) – nets that are used to finish out the bow area and conserve weight on most catamarans. These are important to keep in good condition for safety reasons. Make a great lounge area and in rough seas a fun spray pad.

two heads (n.) – catamaran that either is a three or four cabin version. Some charter built versions still maintain two heads and guests in each hull must share the head.

vertical windows (n.) – windows made famous by Lagoon catamarans. These are windows around the salon that make it very light and airy and allow a higher cabin top with more headroom. The downside is more windage which affects maneuverability when in close quarters and general sailing performance.

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