catamaran boat parts

• Parts and Accessories

C2 F-18 and F-16 USED GEAR

Yard Cover for a C2 Sold

Dyneema adjustable trap lines – The whole works, handles, rings, lines (set of 4) for a C2.  Good condition. $200.   (cost new was $450.)

F-16 Spinnaker – Sharp green. Used 4 days.  Made by Goodall.  $700 .   (new was $1,400.)

Cat Trax Cradles (2) –    Sold 

The above items are located in MA. Call Rick Bliss for info 508-944-6220

PRINDLE 1/2 Round MAST BEARINGS

** 4 in stock. ($26. each) **.

________________________________________

Nacra MAST BALLS

Standard 1-1/2″ mast balls for nacras and inters ($25.) (12 in stock), smaller balls, we have the original s mall (1-1/4″) mast balls in stock for the very old nacra 5.0’s/5.2’s/5.8’s   ($28.each) (6 in stock).

HOBIE Mast Balls (In stock)

 NACRA Stainless Steel DOLPHIN STRIKER RODS

(0 of the 13-1/2″ x 9/6″ out of stock)

( 5 of the 13″ x 9/16″ in stock for the smaller Nacras) $65 .

New N6.0 HULL

New White NACRA 6.0na PORT HULL  $3,000.

BEAMS, SPIN POLES, EXTRUSIONS, BOOMS, TILLER CROSSBARS

NACRA 5.2 front – round beams.  With new style dolphin striker and V-bar $250.. – (used)

Hobie 16 – Front and rear crossbeams and side rails – silver – includes corner castings – used – $200. complete or will part out – Front with castings and dolphin striker $150., rear with traveler car and castings $150., (1) side rail $50.

NACRA-18/20 – Black spinnaker pole Extrusions (new)  (2 in stock – $120.)

NACRA F-18 INFUSION Boom Extrusions – BLACK – (3 in Stock)  $87.50

N18/20 MIDPOLE SNUFFER HOOPS – (2 Hoops in stock) $330.

Nacra 17 Olympic – MIDPOLE SNUFFER BAGS  – RACE – (1) IN STOCK

Nacra 17 Olympic – Boom (1) in Stock

TILLER CROSSBAR PRINDLE (1 in stock)

TILLER ARMS FOR NACRA/INTER 20 (4 in stock)

END POLE SNUFFER BAGS

NACRA F-17/Inter 18 – Black mesh 11′  $185.  (out ofstock)

Nacra 20 End pole snuffer bags – 12′   $190.   (in stock)

MIDPOLE SNUFFER BAGS

Mylar MIDPOLE Snuffer Bags  (2 in stock) for Nacras  $210.

MIDPOLE SNUFFER SUN COVERS

For the NACRA midpole spinnaker snuffer system.  Gray – $155.

SAILS – BATTENS

Random length white foam battens available – Many long ones at various prices.

Nacra 17 Olympic – Snuffer bag (1) in stock – $185.

Nacra 17 Olympic  – Spinnaker (1) red, (1) blue) both with Holmenkol

Nacra F-18 Jib Small Smoke ($500.)

Nacra F-18 INFUSION Jib – Small, roller furling – Smoke   ($525.) 

Nacra F-18 Spinnaker – Used  – WHITE – Large – ($450.) 

Nacra F-18 Infusion MKII Midpole Spinnaker –   by Performance Sails –  (1) (new) in stock $900.

Nacra 17 Olympic – Batten set – Standard – (1) in stock

Nacra 17 Olympic  – Soft batten set (1) in stock, Hard batten set  (1)

TRAMPOLINES

Nacra 17 Olympic – Trampoline – Gray – (1) in stock

Prindle 16   – Trampoline (1) in stock – with port cut-outs 

Nacra/Inter F-17 – Trampoline (1) in stock – Rear lace

NACRA MAST – F-18 Infusion

Nacra F-18 Infusion mast  – Used  – It has a 2″ split at the very bottom. Could be cut down for use on one of the smaller Nacras and the fittings repositioned. $250. (rigging, spreaders and mast base not included). Has to be picked up. Shipping not available.

NACRA 5.0/5.2 Parts

Used Nacra 5.2 front crossbeam. ($250.). New larger mast step rod and associated parts,

Used Nacra 5.0 rudders ($75.each)

Used NACRA 5.0 rudder castings ($70.)  The castings can be used on the Nacra 5.0/5.2/5.8/6.0

Used Aluminum extendable tiller – Works like new ($40.)

CAT TRAX CRADLES

Wdie cradles for Cat Trax beach wheels or trailer installation.  For Inters and F-18’s/Infusions.  In stock. 

RUDDERS, DAGGERBOARDS, ETC

NACRA, INTER, NACRA F-18, PRINDLE and Hobie

Newest style 40″ NACRA (Infusion/F18) Rudders   (1 in stock) 

NACRA 17 Olympic – Tiller cross bar (2 in stock) ($196.)

NACRA F-18 Tiller crossbar complete (1 in stock)  ($196.)

NACRA 5.8/6.0 Daggerboard (2 New – price – $675.)

Nacra 20 Daggerboard  (2 New – in stock – $675.) 

NACRA 5.8/6.0 Rudders (1 New) 

H-14/16/18 Rudder (1 New)  ($220.)

INTER Rudder Casting – Upper  (5 in stock) Lower (0 in stock)

NACRA 17 Olympic tiller arms complete (several in stock)

NACRA 500 – Tiller arms – Black – In stock

Nacra (Inter) 20 – Tiller arms – 6 in stock. Can be cut to fit smaller boats.

Nacra 6.0  Tiller arms – (In stock)

Some old style Hobie 14/16 upper and lower rudder castings and tiller arms but not the old H-18 type.

HOBIE GLASS BATTENS – MANY in STOCK

H14/16/18. Random lengths

TRAPEZE HARNESSES 

Magic Marine, Forward, Ronstan

SWIFT -Trapeze harnesses. Red. These are best for women or kids.

H 14/16/18 Parts Misc. parts. Several H-18 old style rudder cams and cam kits.  SS pins for rudders. H-14/16 corner castings, H-14/16 rudder castings (no old style H-18 rudder castings left), tiller arms, rudders, older style gudgeons, jib traveler adjustment kits, lots of crossbeam bolts, lots of very long aluminum rivets, H-18 anchor plate kits, H-18 rear crossbeam and various other parts. 

Parts of Catamaran: A Comprehensive Guide to Understanding the Components

by Emma Sullivan | Aug 2, 2023 | Sailboat Racing

Short answer: The key parts of a catamaran include the hulls, bridgedeck, mast(s), rigging, sails, rudders, and daggerboards. These components work together to provide stability, propulsion, and control for this type of multi-hulled watercraft.

Exploring the Essential Parts of a Catamaran: A Comprehensive Guide

From cruising the open seas to enjoying lazy afternoons by the shore, catamarans have become a popular choice for water enthusiasts. With their unique design and exceptional stability, these vessels offer an unmatched sailing experience . But have you ever wondered what makes up a catamaran and how each part contributes to its overall functionality? In this comprehensive guide, we will take you through the essential parts of a catamaran, uncovering their purpose and shedding light on why they are instrumental in making these boats such fantastic options for adventure seekers.

1. Hulls: The hulls are the twin structures that form the main body of a catamaran. These structures play a pivotal role in providing stability and buoyancy while at sea. Catamarans boast wider hulls compared to traditional monohull sailboats, resulting in increased surface area and enhanced stability. The design allows for smoother sailing even in rough waters, as each hull slices through waves independently.

2. Keels: Unlike monohull sailboats that rely solely on a single keel positioned beneath the waterline for both lift and resistance against sideways drift (known as leeway), catamarans often feature two separate skegs or keels attached to each hull. These auxiliary structures enhance directional control and offer excellent stability while reducing drag.

3. Deck: The deck is where all the action takes place! It serves as the primary horizontal surface on which passengers can relax, sunbathe or engage in various activities while aboard the vessel. Catamaran decks usually come with ample space due to their wider design compared to monohull sailboats .

4. Trampoline: One of the standout features of a catamaran is its trampoline – a mesh-like netting stretched between the two hulls just above sea level. While it may seem like an unconventional addition, trampolines provide multiple benefits including giving passengers an exhilarating sensation as they sit or lay above the water. This ample recreational area additionally offers an unobstructed view of the sea, making it an ideal spot for stargazing or simply enjoying the soothing sound of the waves.

5. Cockpit: The catamaran’s cockpit is strategically positioned closer to the waterline, ensuring a thrilling and immersive sailing experience. It acts as the primary control center where the helm is located, allowing sailors to expertly navigate their vessel through various seascapes. Additionally, some catamarans offer spacious cockpits that provide sufficient seating capacity for socializing with fellow passengers or hosting intimate gatherings while at anchor.

6. Rigging: The rigging refers to all lines, cables, and hardware necessary for controlling and adjusting the sails . Catamarans typically employ a simple yet effective rigging system that ensures easy maneuverability and efficient sailing performance. By skillfully managing these components, sailors can harness wind power optimally and maintain smooth cruising speeds in any weather conditions.

7. Sails: Sails are central to a catamaran’s propulsion system, enabling it to move gracefully across bodies of water without relying on fuel-based engines alone. Modern catamarans often embrace a sail plan consisting of multiple sails designed to maximize efficiency and adapt seamlessly to varying wind strengths and directions. With innovative designs such as fully battened mainsails and lightweight genoas, these boats have become incredibly agile even when faced with challenging wind patterns.

8. Engines: While a catamaran’s sails provide a significant portion of its power source, auxiliary engines are still crucial for many aspects of sailing life – be it docking in tight spaces or maneuvering during low-wind situations. These engines are usually mounted within each hull beneath deck level as part of an integrated propulsion system comprising shafts, propellers, and operational controls.

9. Navigation Instruments: In today’s era of advanced technological aids, catamarans make use of a range of navigation instruments to enhance safety and efficiency. From GPS systems providing precise positional information to depth sounders measuring water depth, these sophisticated tools are essential for ensuring smooth journeys and avoiding potential hazards.

So there you have it – a detailed glimpse into the essential parts of a catamaran. Wherever your sailing adventures take you, now you can fully appreciate how each component contributes to the incredible performance and unrivaled experience offered by these magnificent vessels. So hop aboard a catamaran and embark on your next nautical journey with confidence!

How to Identify and Understand the Various Components of a Catamaran

Catamarans are fascinating vessels known for their unique design and exceptional performance on the water. Whether you are a seasoned sailor or just interested in learning more about these incredible boats, understanding their various components is essential . In this blog post, we will take a detailed, professional, witty, and clever dive into the world of catamarans and shed light on how to identify and understand their different parts .

1. Hulls: At the core of any catamaran are its hulls – the main supportive structures that keep the boat afloat. Unlike traditional single-hulled vessels, catamarans have two parallel hulls connected by a deck. These hulls play a vital role in providing stability and minimizing drag while sailing. Think of them as the sturdy legs that help the catamaran gracefully glide through the water .

2. Deck: The deck serves both as a platform for enjoying your time onboard and as an important structural element that connects various parts of the catamaran. It consists of multiple areas such as the helm station (where you control the boat), seating areas, dining spaces, trampoline nets for lounging, and storage compartments. Sunbathing or hosting friends for a sunset gathering? The deck has got you covered!

3. Rigging: If you’ve ever looked up at a sailboat’s mast with admiration, then you’ll love discovering how rigging contributes to a catamaran’s overall performance and elegance. The rigging includes all the supporting wires and ropes that hold up the mast(s) on your catamaran and control its position relative to wind direction (known as “trimming”). Understanding how to properly trim your sails can greatly enhance your sailing experience – from capturing optimal wind power to achieving picture-worthy maneuvers.

4. Sails: What could be more mesmerizing than watching billowing sails against an azure sky? Catamarans utilize various types of sails based on their purpose – mainsails, jibs, genoas, spinnakers – each designed to maximize performance under specific wind conditions. Learning about the different sails and their characteristics will help you navigate efficiently and make the most of your sailing adventures. Plus, understanding the art of sail trim is sure to impress your fellow sailors!

5. Rudders: Just as a captain relies on his or her compass for navigation, catamarans depend on rudders to steer through the water with precision. Mounted at the stern (rear) of each hull, these ingenious components allow you to control your course by diverting the flow of water passing beneath them. Rudders are essential for maintaining stability and maneuverability when tacking, jibing, or navigating challenging waters.

6. Engines: Catamarans aren’t solely reliant on wind power; they often incorporate engines as auxiliary means of propulsion. These mechanical marvels provide added security and flexibility during low-wind situations or when maneuvering in confined spaces like marinas or crowded anchorages. Understanding how to handle your catamaran’s engines confidently will ensure smooth sailing even when Mother Nature plays hard-to-get.

By expanding your knowledge about these various catamaran components – hulls, deck, rigging, sails, rudders, and engines – you’ll unlock a whole new level of appreciation for these magnificent vessels and gain confidence in navigating them.

Lastly, remember that wit and cleverness go hand-in-hand with professionalism when exploring any topic. So have fun while unraveling the mysteries of catamaran anatomy! Perhaps envision yourself as an expert sailor who can distinguish port from starboard blindfolded or sharpen your comedic skills by jokingly referring to hulls as “feline foundation” (though cats might not appreciate sharing their name with boats!).

Happy sailing!

Step-by-Step Breakdown: Unraveling the Mysteries behind Catamaran Anatomy

Catamarans have become increasingly popular in recent years, mainly due to their unmatched stability and impressive speed capabilities. But have you ever wondered what lies beneath the sleek exterior of these remarkable vessels? In this blog post, we will delve into the intricate details of catamaran anatomy, providing you with a comprehensive understanding of how these boats are constructed and why they excel on the water.

1. The Hulls: The Foundation of Stability At the core of every catamaran lies its hulls – two parallel structures that run alongside each other. Unlike traditional monohull boats that feature a single hull, catamarans distribute their buoyancy across two hulls, offering superior stability even in rough waters. These hulls are typically made from fiberglass or aluminum and are designed to cut through waves effortlessly, minimizing resistance and maximizing speed.

2. Bridging the Gap: The Trampoline One striking feature present in many catamarans is the trampoline located between the two hulls. This sturdy mesh-like material serves various purposes. Firstly, it provides an additional platform for sunbathing or relaxing while underway. Secondly, it acts as a safety net by preventing crew members or passengers from falling into the ocean should any unexpected jolts occur during navigation .

3. Connecting Hulls: The Crossbeams In order to maintain structural integrity and connect both hulls securely, catamarans utilize crossbeams that stretch between them. These crossbeams play a vital role in sharing weight distribution evenly across both sides, ensuring stability and balance at all times.

4. Above Deck: Central Cockpit and Living Space Moving upwards onto the deck area, you’ll discover a central cockpit where most controls and steering mechanisms are located. This strategic placement allows for optimum visibility and easy maneuverability while sailing. Additionally, catamarans often feature large living spaces, including saloons and cabins that provide ample room for socializing, dining, and sleeping. Their spaciousness is a significant factor contributing to their growing popularity among cruising enthusiasts.

5. The Power of Sails: Rigging and Sail Plan Catamarans rely on sails for propulsion, utilizing a complex system of rigging to hoist and control them effectively. A unique feature of catamarans is the absence of a single mast; instead, they employ multiple masts strategically positioned between the hulls. This configuration optimizes sail area while reducing heeling (when a boat tips sideways due to windy conditions), resulting in smoother sailing experiences even during stronger winds.

6. Additional Features: Daggerboards or Foils To enhance performance further, some catamarans are equipped with daggerboards or foils – retractable appendages located beneath each hull. These boards reduce lateral slippage by providing lift, improving upwind capability and enhancing overall speed. As technology advances, advanced hydrofoil systems have also been introduced in certain catamaran models, allowing these boats to glide above the water ‘s surface entirely.

By unraveling the mysteries behind catamaran anatomy step-by-step, it becomes evident why these vessels are highly sought after by both leisure sailors and competitive racers alike. From their stable hull design to innovative features such as trampolines and foils – every element plays its part in creating an exceptional sailing experience that combines comfort, speed, and versatility. Perhaps now you can fully appreciate these engineering marvels whenever you set sight on one gliding gracefully through the waves!

Frequently Asked Questions about the Different Parts of a Catamaran Answered

Have you ever looked at a catamaran and wondered what all those different parts are called? Or maybe you’re thinking about buying or renting a catamaran and want to be familiar with its components . Well, look no further! We’ve compiled a list of frequently asked questions about the different parts of a catamaran and will provide detailed, professional, witty, and clever explanations just for you.

1. What is a Catamaran? A catamaran is a type of boat that consists of two parallel hulls connected by a deck. It offers increased stability compared to traditional monohull boats due to the wider beam. This unique design allows for smoother sailing experiences and more spacious interiors.

2. Hulls – What Are They? The hulls are the main structure of a catamaran, providing buoyancy and supporting the entire vessel. Typically made from fiberglass or aluminum, they have curved shapes that help reduce resistance in the water while providing stability. Think of them as the legs of the feline-inspired boat!

3. Trampoline – Isn’t That for Jumping? While it may sound similar to the equipment used for bouncing around at your local playground, in the world of catamarans, trampoline refers to an open area between the hulls where passengers can relax or even stretch their sea legs! Made from durable materials like nylon mesh or PVC canvas, trampolines provide excellent circulation and an unobstructed view below deck.

4. Rigging – Is it Related to Sailing Techniques? Indeed! Rigging refers to all the elements involved in controlling sails on a catamaran . This includes mast(s), boom(s), standing rigging (shrouds & stays), running rigging (halyards & sheets), winches, cleats – basically everything needed to manipulate wind power efficiently and safely navigate through various conditions.

5. The Mast – How Tall Should It Be? The mast, often made of aluminum or carbon fiber composite, is the tall vertical pole that holds up the sails. Its height depends on several factors, such as boat size, intended use, and the desired sail area. Think of it as the catamaran’s lighthouse – guiding you along your aquatic adventures with grace.

6. Boom – Not Just a Sound Effect! Nope, not just an imitation of an explosion! The boom is a horizontal spar attached to the bottom of the mast, helping support and control the lower edge (foot) of the mainsail. It swings back and forth with changes in wind direction – think of it as a catamaran’s wagging tail!

7. Daggerboards – Are They Catamaran Ninja Weapons? While they may sound dangerous and ninja-worthy, daggerboards are actually retractable foils that extend from each hull into the water. Their purpose? Providing lateral resistance against sideways motion caused by wind force while improving upwind performance by reducing leeway – no martial arts skills required!

8. Rudders – Steering Like a Pro Like most boats, catamarans have rudders for steering purposes. These underwater blades at the stern help control direction by redirecting water flow around them when turned. Whether you’re tacking or gybing through waves or researching rudder-related puns like this one—we’ve got you covered.

So there you have it – frequently asked questions about the different parts of a catamaran answered in detail! Now you can impress your fellow sailors with your newfound knowledge or confidently embark on your next seafaring adventure aboard one of these sleek double-hulled vessels ! Remember to keep exploring and enjoy every nautical mile!

The Key Elements That Make up a Catamaran: Everything You Need to Know

Title: The Key Elements That Make up a Catamaran: Everything You Need to Know

Introduction: Catamarans have long fascinated sailing enthusiasts with their unique design, efficient performance, and spacious interiors. Whether you are a seasoned sailor or a curious novice, understanding the key elements that make up a catamaran is essential. In this enlightening article, we will delve into the intricate details of these remarkable vessels, uncovering the secrets behind their success on the open seas .

1. Hull Design: Stability Meets Speed At the heart of every catamaran lies its dual-hull structure. Unlike traditional monohulls, catamarans feature two separate hulls connected by a spacious deck. This design offers enhanced stability and reduced heeling, making them less prone to capsizing compared to their single-hulled counterparts. The inherent buoyancy allows for faster speeds and smoother sailing experiences—enabling both exhilarating adventures and relaxed cruising.

2. Beam: Embracing Extra Space One of the most significant advantages of a catamaran is its beam—the width between its two hulls—which can be quite impressive. The ample beam creates an exceptionally generous living area that sets catamarans apart from other sailboats . More space means greater comfort for passengers and crew alike; accommodating larger groups, luxurious amenities, and even personalized additions such as Jacuzzis or sunbathing decks.

3. Stability & Balance: A Steady Journey In addition to their unique structural design, catamarans offer exceptional stability through weight distribution and physics principles. With twin hulls spread apart at a considerable distance, it becomes significantly easier to maintain balance during sailing motions—a significant advantage for those susceptible to seasickness or seeking effortless navigation under challenging conditions.

4. Sailor-Friendly Handling: Ease-of-Use at Sea Catamarans excel in terms of maneuverability due to several factors working harmoniously together. Their shallow drafts allow for exploration in shallower waters, and docking becomes a breeze with the ability to navigate narrower marinas. Furthermore, their twin engines operate independently, offering excellent control even in tight spots or challenging wind conditions—a maneuverability dream for sailors of all skill levels.

5. Sailing Performance: Effortless Speed When it comes to performance on the water, catamarans stand tall once again. The efficiency gained from their two hulls reduces drag and enables quicker acceleration, resulting in higher average speeds than traditional monohulls. Even when faced with light winds, their ample deck space allows for customized rigging options—such as efficient sails or high-tech foiling capabilities—that can unlock extraordinary speed potential.

6. Comfortable Living Spaces: An Unprecedented Haven Catamarans redefine on-board living by providing both ample space and superior comfort. The expansive interior saloon offers panoramic views of the surroundings while being versatile enough to cater to various activities—from hosting lively social gatherings to peacefully reading a book by the window. Additionally, private cabins are often located in each hull, creating secluded sanctuaries for relaxation and tranquility amidst enchanting seascapes.

Conclusion: As we conclude our exploration into the key elements that make up a catamaran, it becomes evident why these vessels have become revered in the sailing world . The revolutionary dual-hull design ensures stability and faster speeds while offering unparalleled comfort and spaciousness aboard. Whether you seek adventure or serenity on the seas, understanding these elements will help you appreciate catamarans’ remarkable qualities truly—an embodiment of innovation and maritime excellence brought together harmoniously by human ingenuity.

Mastering the Parts of a Catamaran: A Beginner’s Guide for Sailing Enthusiasts

Are you a sailing enthusiast who is fascinated by the sleek and efficient design of catamarans? If so, then you’ve come to the right place! In this comprehensive beginner’s guide, we will delve into the key components of a catamaran and unlock the secrets to mastering its various parts. So grab your sailor’s hat and get ready to embark on an exciting journey through the intricate world of catamaran sailing!

The first component that sets a catamaran apart from other sailboats is its dual-hulled structure. Unlike traditional monohull sailboats, which have only one hull, catamarans feature two parallel hulls connected by a deck or bridge. This unique design grants them exceptional stability, speed, and even more interior space for amenities such as cabins and lounging areas.

Now let’s move onto a crucial part of any sailboat – the rigging . The rigging system on a catamaran consists of numerous elements that work harmoniously to control and manipulate the sails . Firstly, there are the masts: tall vertical structures that support the sails. Catamarans typically have two masts placed towards each end of the boat , allowing for efficient distribution of power.

Attached to these masts are various types of sails, including mainsails, jibs or genoas (fore-sails), and spinnakers (used for downwind sailing). The main sail is the largest sail on a catamaran and is hoisted up the mast using halyards – ropes specifically designed for this purpose. Jibs or genoas assist in maneuverability by generating additional power when sailing upwind.

For those seeking exhilarating downwind adventures, spinnakers add an extra element of thrill to your journey! These expansive triangular or bulbous-shaped sails catch wind from behind and propel your catamaran with remarkable swiftness. Learning how to handle these different types of sails will be crucial to seamlessly controlling the boat and maximizing performance on the water.

Next in line are the helm and steering system, responsible for guiding your catamaran ‘s path as it gracefully glides through the waves. The helm, often referred to as the steering wheel , is used to control the rudders located at each hull’s stern. One unique characteristic of catamarans is their tilting tendency caused by wind pressure acting upon the exposed surface area of their broad decks. Therefore, mastering steering techniques, including adjusting sail configurations and keel positions, will help you navigate with finesse and maintain balance.

One particularly innovative feature found in some catamarans is a daggerboard or a centerboard system. Located between the two hulls beneath the waterline, these retractable fins can be individually raised or lowered to vary their depth while sailing. By adjusting these boards according to wind conditions and point of sail , you can minimize resistance, optimize speed, and even prevent lateral drift.

We cannot overlook catamarans’ anchoring systems when discussing their components . Anchors are vital for keeping your vessel secure when moored or stopping for a leisurely swim in crystal-clear waters. Most modern catamarans employ bow rollers integrated at the front end that facilitate effortless anchor deployment and retrieval. With an array of anchor types available — from plows to flukes — it’s essential to understand each one’s characteristics in various seabed environments.

Lastly, let’s not forget about safety equipment onboard! While mastering catamaran parts allows for glorious adventures on calm seas, unforeseen challenges may arise during your sailing odysseys. It’s important always to have safety essentials like life jackets, fire extinguishers, first-aid kits, emergency flares, and navigational tools like GPS systems.

So there you have it – a comprehensive overview of key components necessary for mastering the art of sailing a catamaran! Understanding how each piece of the puzzle fits together and harmonizes uniquely will set you on a path to becoming a skilled catamaran sailor . Whether you’re gliding across tranquil bays or tackling exhilarating rough seas, this guide will equip you with the knowledge and confidence to embark on unforgettable nautical journeys!

Recent Posts

• Approaching a Mooring Buoy: Essential Tips for Safe Navigation
• Best Tiller Autopilot: Enhance Your Sailing Experience
• Nautical Navigator: Essential Tools and Techniques for Seamanship
• Sail Making Material: A Comprehensive Guide
• 2 Person Dinghy: The Ultimate Guide to Choosing the Perfect Boat
• Sailboat Gear and Equipment
• Sailboat Lifestyle
• Sailboat Maintenance
• Sailboat Racing
• Sailboat Tips and Tricks
• Sailboat Types
• Sailing Adventures
• Sailing Destinations
• Sailing Safety
• Sailing Techniques

Whether it’s a day of water sports, island hopping, or simply enjoying the open water, our 28-foot dual-console catamaran is the perfect platform for family adventures and unforgettable experiences.

Over 450 square feet of deck space, 2500 quarts of insulated storage, 150 gallon capacity of our livewells, and up to 1800HP prepare you for endless adventure.

STAY DRY, ENJOY THE RIDE, FEEL THE DIFFERENCE…

Join over 7000 Twin Vee owners from around the World. Feel confident that you’re purchasing one of the most stylish, highest quality, and best performing boats in the marine industry.

WHEN WE SAY, “THE BEST RIDING BOAT ON THE WATER,” We Mean It. It’s in our DNA!

Twin Vee PowerCats Co. Commences Production of New 340 GFX Boat

Twin Vee PowerCats Co. Announces Closing of Initial Public Offering

Twin Vee 240 Center Console Featured in August Issue of Rudow’s Fishtalk Magazine

Build Your Twin Vee

" * " indicates required fields

Step 1 of 6

Contact A Dealer

Step 1 of 7

Hull and Deck

• (2) 475 Quart Coffin Box Tubs with Raised Stainless Steel Insert
• (2) 700 Quart In Floor Fish Boxes with Macerators
• 10” Stainless Steel Pull-up Cleats – (6)
• 360 – Degree Walk Around Fishability
• Above Deck Live Wells
• Anchor Locker with Fender storage
• Bilge Access Thru Mechanical Room Hatches in Cockpit
• Cup holders: Stainless Steel (10)
• Drain covers: stainless steel w/Twin Vee Logo
• Electric Reel Outlets (4)
• Folding Transom Dive Ladder
• Foldout Tackle and Gear Storage Port and Starboard
• Fuel Cells “Florida Marine Tanks” 375 Gallon each x Fuel Level Sensors
• Gel Coat Colors: Ice Blue, Seafoam, Whisper Gray or White
• Grip Tek – yacht-style non-skid 
• Integrated Digital Switching System
• LED Courtesy lights throughout, Blue 
• Lewmar Stainless VX2 GO 700w Windlass
• Pop Up 3 ½” Fender Cleats (6)
• Rear Facing Tackle Station with Drawers
• Resin Infusion Construction for all Fiberglass Parts w/ Carbon Fiber support for strength
• Rod holders: (20) Stainless Steel – 10 per side Gunwale & (8) on Aluminum T-Top connect piece
• Rod Holders: Aluminum transom mounted “Euro” rod holders 10 total (5) each port/stbd
• Rub Rail: Thick Flexible rub rail with insert, white or black
• Stainless Marine Outboard Brackets
• Stainless Steel Bow and Stern Tow Eyes – (3)
• Stainless Steel Bow Roller
• Starboard Side Tuna/Dive Door
• Tension hinges: Stainless and Brass
• Thru hulls: Stainless Steel
• Transom Swim/Fish/Sun platform 
• Twin Vee logos, Model Designator logo 
• Under Gunwale Rod Racks Port and Starboard
• Underwater LED lights 
• Upper Bow Storage with Molded Fiberglass Hatches
• Wash down: Raw water washdown, stern

Console, Helm & T-Top Features

• 3 Bank battery charger
• 3 Spoke Polished Stainless Steering Wheel w/ Turning Knob
• ABYC Standard Fire extinguisher
• Acrylic Dash Panel w/ extra-large surface area for electronics
• AGM Sealed Batteries 
• All Digital Switch panel: Gloss Black Panel push buttons [blue LED lights/red in use], USB, and 12v receptacle with circuit breaker protection
• Battery selector with on/off switches (2)
• Console Accessory Storage with USB Ports
• Electric Marine Horn
• Freshwater Marine Head with Macerator
• Fully Enclosed Tempered and Tinted Glass Windshield
• Ritchie Voyager Compass
• Seastar All Electric Steering 
• White Powder Coated Aluminum Doors Port/Starboard

T-top Features

• Aluminum Powder Coat Gloss/Textured (White or Black)
• Electric motorized anchor light/electric antenna mount
• Flood/Search Light Bar LED, forward & aft, 10,000+ lumens- independently switched
• Integrated Powder Coated Aluminum T-top system, flush mounted onto the console
• LED Cockpit and Compartment Accent Lighting Throughout
• Molded Fiberglass Hardtop w/ Radio Box and Rocket Launchers 
• Motorized Anchor and Antenna Mount 316 Stainless Steel Hardware 
• Spreader Lights with 360 Degree Lighting

Livewells, Pumps & Storage

• “Hooker” Live well Sea Chest with Variable Speed Pumps 
• 2000 GPH Bilge Pumps with “Ultra Safety” Bilge Switch (4)
• Coffin insulated storage/fish boxes – forward-facing/upholstered chaise lounge seating
• Freshwater Washdown in Bow
• Raw Water Washdown Pump
• Twin transom live wells (45gal), (1 ea.) port & stbd

Seating and Upholstery

• Bow Storage, Insulated and Dry, with Hatches, Friction Hinges
• Entertainment Center Stainless Steel Sink with Bait Prep and Freshwater Washdown
• Forward Facing Console Lounge Seating
• Premium Triple Captain Helm Chairs with Second Row Seating 
• Premium GG Schmitt aft seating w/ polished stainless-steel port/stbd

40′ 0″

12′ 0″

FUEL CAPACITY

750 Gallons

DRY WEIGHT w/ Engines

COG from Bow

LIVEWELL CAPACITY

FLIBS Sign up

YOUR INFORMATION

YOUR ADDRESS

YOUR INTERESTS

BOAT OWNERSHIP

See all Nacra models

Shopping for your business.

Do you order for a sailing school or club, a resort, or do you want to become a Nacra Certified Dealer? Contact Nacra Sailing to apply.

© Nacra Sailing INT. 2024

Compiling a Spares Inventory List for a Cruising Catamaran

Are we adequately prepared for our sailing adventures? Do we have all the gear and spares that we might need while cruising? These are complex questions to which there is no correct answer. How many times have we disposed of an item only to find that a week or so later we needed that exact item. This is the dilemma we all face when taking to the sailing/cruising lifestyle. Remember, weight is a big no-no for catamarans, so how much is enough and how much is too much?

We asked the Catamaran Guru team to give us a few suggestions of the spares that they carry onboard their own catamarans. We combined their lists and we tried to make some suggestions here for items to be considered. Please keep your personal requirements in mind whilst compiling your own spares package. There is ONLY one correct solution to this issue which is:- I had the part I needed when I needed it! Not having the spare part to get a system back to the manufacturers’ specification, does not mean the end of your cruising days but it certainly will make life a lot more pleasant.

One last thought is to identify what systems are deemed critical to safety and determine if a backup system can be installed in parallel. Terry on Khaleesi (Lagoon 450S) says: “While crossing the Pacific in 2015, we had our primary Autopilot computer fail. We had a spare linear drive on board and this backup Auto Pilot helped us finish off a 4-day passage as hand steering was not a task we relished! But we immediately ordered a replacement computer and did the proper repair”.

Stephen suggests that there are some fundamental questions to be asked when working on a spares inventory list. As a starting point, consideration should be given to some of these items:

• What are my cruising expectations, destination and time away from adequate spare parts?
• How competent am I in the installation of a spare part? Some basic knowledge of your boat systems is highly recommended! Take classes to help you understand what you will be dealing with i.e.  diesel engine classes  or read this article about  how a marine diesel engine works .
• If I cannot install it myself, will I be in an area where help is available? If you plan to be in remote areas, be prepared to do most repairs yourself
• What happens if I am underway and a critical item fails like an autopilot? Do you have a spare and can you fit it?
• How can I manage with system failures using alternative means? Should I become familiar with some critical failure scenarios just in case? What alternatives are available? Can I do a “McGyver” repair if need be
• Storage space? Even on a catamaran with oodles of space comparatively, you cannot carry the whole of West Marine with you!
• What tools do I need?
• Identifying critical systems versus convenient systems is a pre-cursor to building your spares inventory.

Let us explore the above questions in a little more depth.

• Assuming we are in a sailing catamaran, we most likely have three sources of propulsion. We have two main engines and we have sails. Except for the extreme case, a failure of one of these systems would only be an inconvenience.
• Failure of a marine head is not a big deal as it could be substituted by another head on the vessel.
• A domestic water pump could be replaced by a deck wash pump or one feeding a head.

So none of the scenarios above are critical repairs and the vessel can limp along. While inconvenient, the vessel will not be incapacitated. Therefore, our first point of call is to consider alternatives for  critical systems  on our own vessel. Now suppose you go to an out-island and take on some contaminated fuel! This most likely is going to affect several systems. We may now have no engines, no generator, no propulsion or electrical charging capability. In this instance it would be good to have a means of repair on hand.

General Ship Spares List

The following is a list of considerations for a spares list based on our personal experience. We have some spares that have never been used, some that are convenient to have and some that we consider a must have. They are broken into sections commensurate with likely use.

Essential Spares • BEER or RUM! This can be traded for spares and assistance worldwide. Also helps celebrate a successful repair.

• Emergency through-hull plugs • Snorkel/Mask/Fins • Locktite underwater epoxy, 2 part in a tube. • Multi-meter and knowledge of how to use it! • Fuses for all system fuses • Selection of hose clamps • Self-sealing repair tape • 3M 5200 / 4200 • Spare length of line, preferably to match the longest line onboard, we have several of all lenths, strenghts and thicknesses. • Replace your current Topping lift with a Halyard size line so that if the main halyard fails ,you have a spare halyard. • 100 feet of Amsteel, can be used to temporarily repair standing rigging • Tool kit, combination toolkit (e.g. Sears) • Boat maintenance manual, either electronic or paper (Chapman’s style) • Navigational software on a tablet or smart phone (We use Navionics) • Paper charts • Hand Held VHF radio • Spare Anchor and Rode • Dingy repair kit • Sail repair kit with some sticky Dacron

Regular Spares

• Water pump service kit – domestic • Water pump service kit – other, shower, head etc., • Spare key, boat and any locks • Water filters, house and water maker

Full Spares inventory

• Domestic water pump • One spare water pump for other systems • Critical electronic components, many modern electrical panels are susceptible to electrical failure in lightning storms • Spare relay for windlass/electric winch if loads are high • Spare generic filler cap for water/waste/fuel • Water filter inserts • Water maker filters and spares • Spare block, shackle/rope shackles • Ancor style electrical connectors, wire and crimpers • Snatch block  • Block and tackle

Engine/Generator/Outboard spares as appropriate Essential

• Fuel filters • Fan belt • Oil engine/gearbox/saildrive • Coolant • Raw water pump impellor • Hydraulic fluid/Autopilot drive

Normal Spares

• Raw water pump impellor overhaul kit and gasket • Raw water pump seals and wear plates • Selection of hose clamps • Oil filter • Spare key Full Spares inventory • Starter motor • Alternator • Fuel injector • Spare raw water pump • Engine water hose set • Gaskets for exhaust elbow and raw water pump • Anodes for propeller, saildrive and generator • Saildrive seals if applicable • Service/parts manual for each engine

Now we have an idea of the types of things to carry let us suggest a couple of other useful tips.  • Where do we store all this stuff? • How do we find it when needed?

We use clear to semi-clear plastic bins that are numbered. Where possible, items that relate to one another are stored together – engine parts with engine parts etc. Most importantly we keep a record of the number of the box and it’s contents on a spreadsheet and we do keep part numbers for common items also. This becomes especially useful when trying to order by phone or trade with another boater in need, for beer – see item at top of the list. We tend to store service items for the next maintenance event in the same locations, in that way I regularly have cause to go into the boxes and check contents. As a matter for another article, I keep ships records and many other useful information on the same spreadsheet.

There are too many permutations to determine an exact spares package but a general understanding of how your boat systems operate will help determine the likely failures that will need to be overcome, however with a little planning and forethought most breakages or component failures can be managed until repairs can be done properly.

Our thanks to the Catamaran Guru Brokerage team for sharing their thoughts! Martin, Stephen and Terry. 

Tell us what spares you have onboard!

Estelle Cockcroft

Join our community.

Get the latest on catamaran news, sailing events, buying and selling tips, community happenings, webinars & seminars, and much more!

Leave a Comment Cancel Reply

Your email address will not be published. Required fields are marked *

Save my name, email, and website in this browser for the next time I comment.

Recent Posts

Love stories at sea…because it’s valentine’s day.

Because it’s Valentine’s day, we wanted to celebrate all the couples that we helped

Your Go-To Resource for all your Catamaran Needs!

Check out our brochure to learn about all we have to offer and why

Yacht Manufacturers Bankruptcies: How to protect yourself

Silent Yachts, a company specializing in the production of solar electric catamarans, has recently

Unforgettable Crewed Yacht Charter Experience on a Bali 5.4

sailing the exumas I remember thinking last year when we signed Zuri 3 up

For more than 30 years, we have been a part of the catamaran community and created Catamaran Guru™ to encourage and educate all the aspiring sailing out there. We understand the dream of traveling the world by catamaran and created a one-stop-shop to make that dream a reality for you.

• Stephen & Estelle
• Testimonials

Get Started

• Yacht Sales
• Used Yachts
• Charter Management
• Boat as Business Programs
• Seminars & Events

Accessories

Boat accessories.

To order please call us toll free at 1-877-999-4228

When you purchase a CraigCat® Catamaran Boat you are buying a versatile piece of machinery with all the flexibility for customization or upgrades. Choose from a selection of the latest high-performance accessories or CraigCat® fashions. Contact us for further details. Click Images below to enlarge.

For CraigCat Owners Pre-2010

Nylon Bolts and Hardware need to be changed every three years and upgraded to the Stainless Steel Hardware Kit. Please call our parts department for more information.

Did You Know That We Offer Contract to Closing Services? Click Here to Find Out More.

Need Marine Financing? Apply Here With Our Partner, First Approval Source

• Catamaran Interviews
• Catamaran Reviews
• Buying Advice
• Selling Advice
• Woods Design Advice
• Americat 3014
• Balance 526
• Bali 40 Catspace
• Beneteau Blue II
• Broadblue 346
• Broadblue 38 Prestige
• Broadblue 385
• Broadblue 435
• Broadblue 46
• Catalac 10M
• Catalac 11M
• Catalac 12M
• Catalac 900
• Catana 42 S
• Chris White 48 Voyager
• Chris White 55
• Corsair F28 R
• De Villiers
• Dolphin 460
• Endeavour 30
• Endeavour 35 Victory
• Endeavour 36
• Endeavour 44
• Endeavour 44 TrawlerCat
• Fortuna 36 Island Spirit
• Fortuna 401 Island Spirit
• FP 32 Maldives
• FP 35 Tobago
• FP 37 Antigua
• FP 38 Athena
• FP 39 Fidji
• FP 40 Lavezzi
• FP 40 Lucia
• FP 40 Summerland MY
• FP 41 Lipari
• FP 42 Astrea
• FP 42 Venezia
• FP 43 Belize
• FP 44 Helia
• FP 44 Orana
• FP 46 Bahia
• FP 46 Casamance
• FP 48 Salina
• FP 56 Marquises
• FP 57 Sanya
• FP 60 Eleuthera
• FP Saona 47
• Gemini 3000
• Gemini 3200
• Gemini 3400
• Grainger 420 Mystery Cove
• Hirondelle 7M
• Lagoon 37 TPI
• Lagoon 42 TPI
• Lagoon 43 PC
• Leopard 39 PowerCat
• Leopard 45 Classic
• Leopard 47 PowerCat
• Leopard 51 PowerCat
• Leopard 53 PowerCat
• Maine Cat 30
• Maine Cat 41
• Matrix 450 Vision
• Matrix 760 Silhouette
• Maverick 400
• Maverick 420
• Maverick 440
• Nautitech 40
• Nautitech 442
• Nautitech 46 Open
• Nautitech 47
• Outremer 40
• Outremer 45
• Outremer 55
• Privilege 37
• Privilege 39
• Privilege 42
• Privilege 43
• Privilege 435
• Privilege 45
• Privilege 465
• Privilege 48 Transcat
• Privilege 482
• Privilege Serie 5
• Prout 31 Quest
• Prout 33 Quest
• Prout 34 Event
• Prout 35 Snowgoose
• Prout 37 Snowgoose
• Prout 37 Snowgoose Elite
• Prout 38 Manta
• Prout 39 Escale
• Royal Cape 45
• Royal Cape 530 Majestic
• Royal Cape Majestic 500
• Sailcraft 30 Iroquois
• Sailcraft 32 Comanche
• Sailcraft 35 Cherokee
• Sailcraft 41 Apache
• Sailcraft 44 Apache
• Wildcat 350
• Seawind 1000
• Seawind 1160
• Seawind 1200
• Seawind 1260
• Seawind 1600
• Solaris 36 Sunrise
• Solaris 36 Sunstar
• St Francis 44
• St Francis 48
• St Francis 50
• Stealth 11.8
• Heavenly Twins 26
• Ocean Twins 38
• Voyage 380 Maxim
• Voyage 400 Norseman
• Voyage 430 Norseman
• Voyage 450 Cabriolet
• Voyage 47 Mayotte
• Wharram 38 Tiki
• AMI 320 Renaissance
• Woods 22 Wizard
• Woods 35 Banshee
• Woods 35 Flica
• Woods 36 Scylla
• Woods 36 Vardo
• Woods 38 Transit
• Woods 40 Meander
• Xquisite X5
• Xquisite X5+

Catamaran Construction – Hulls, Laminates, and Composites

• Post author By BJ Porter
• Post date October 15, 2020
• 3 Comments on Catamaran Construction – Hulls, Laminates, and Composites

It’s a given that catamarans are more sensitive to weight and loading than monohulls. Catamaran builders strive to build the lightest boats they can without sacrificing strength and stiffness, and have adapted new building techniques and materials to meet this target. Cutting weight allows more passengers and gear without sacrificing performance.

And the marketing materials reflect it–they load every review and website with polysyllabic technical jargon describing the design and production choices each builder made to deliver the best boat they can.

But when you’re reading a brochure and you come across phrases like “ hand laid bidirectional GRP ” or “ vacuumed bagged e-glass with vinylester resin over a Divinycell core ” do you know what that really means?

All modern production catamarans are made with “FRP” construction (for Fiber Reinforced Polymer). Composites aren’t new–it’s just using materials together to strengthen the whole assembly. Straw was added to bricks centuries ago, and steel reinforced concrete is a staple of construction over the last century. For boats, it’s the use of stranded fibers and cured resins which make FRP different.

The term “FRP” doesn’t get into the technical detail of which fibers and which plastics, and how they’re put together to build your hull. There’s a wide variety of fiber types which can be stranded, woven, chopped or sprayed in a varied of patterns then combined with several types of resins to make hulls with different characteristics.

Some FRP techniques produce lighter, stronger shapes, while others are quicker to build and less expensive to produce. The choice of technique is a function of many factors, from the number of hulls and parts to be built, the type of parts, the budget for the project, and many design specific requirements for weight and strength.

1. FRP Basics

The principle behind all FRP construction is the same – you lay our fibers in the shape you need, then saturate them with resin, removing all the air and voids you can. Resin is left to cure, then the piece is ready to finish and use.

The reality is more complex, since building a boat isn’t like making a flat board or a simple door. You’ve got a complex shape with a designed set of curves to build. “Tooling” is the set of shapes to make the boat parts; molds to cover with fiberglass to get the right shapes.

That’s what makes FRP so effective – you can make almost anything out of it. But to do so requires a lot of choices about what you need for the project at hand.

There isn’t a “best” all around material or technique choice for all jobs, and sometimes a lower cost technique or easier to work with material may be the better solution to the problem.

A. Fiber types

Fiber choices in the last few decades have expanded past the glass fibers used in the first mass produced boats in the 1960s. FRP construction wasn’t new even then, they built the first composite boats using modern fiberglass in the 1940s.

The major fibers used in marine construction fall into three categories – glass, aramids, and carbon. The primary differences are in the strength to weight ratios of the fibers, durability, elasticity, and cost. Some construction may use blends of fiber types to combine performance characteristics.

Glass – the most common material still, because of its low cost and versatility. The most common variety used in GRP (Glass Reinforced Polymer) is “E-glass” which refers to its strand size and mineral content. Other grades have different and sometimes better mechanical properties, but may be more expensive and less appropriate for boat building use. Fiber sizes run 10 to 25 microns for E-glass, though other grades may be smaller.

Brands like Leopard, Lagoon, and most higher production volume builders use E-glass.

Aramids – this includes brand names like Kevlar, Technora and Twaron. They have higher tensile strength than E-glass, and resistant abrasion and punctures. Kevlar is a common choice for bullet proof body armor, and can built a tough, lightweight hull. The materials can be difficult to work with, as it is very tough to cut the cloth. It is often blended with carbon fiber or other materials – Catana is known for using Twaron blends in hull construction.

Carbon – the ultimate in lightweight, strong construction material. Carbon fiber is the most expensive fiber, and is available in a variety of weights, grades and strengths. Fibers are smaller than glass – down to 5 Micron.

The lightest, most expensive hulls are made from carbon, but a catamaran builder may use carbon in places other than the hull to add strength and stiffness. Carbon boards, rudders, and reinforcing structures can enhance performance without driving the price of the boat beyond reach. Carbon is the fiber of choice for many custom builds, racing cats, and Gunboat.

B. Mats, Strands, Roving, Direction, and Weights

Fibers are woven into matting and cloth for construction. Depending on the application, different weights of cloth and cloth patterns and weaves may be more appropriate for the job.

Cloth weight refers to the weight per square yard (or meter) of the cloth. A square yard of nine ounce cloth weighs nine ounces. The heavier the cloth, the stronger it is in a laminate.

Fibers carry loads along their length, so cloth weaves have directionality to their strength. Most builders use several layers of cloth with different orientations to give good universal strength to hulls. Specific FRP applications with strict load-path requirements may have more unidirectional fiber layering – for example, a chainplate manufactured from carbon fiber may use unidirectional fiber.

Cloth – fiberglass cloth is commonly used on outer layers of composites. Cloth may have unidirectional or bidirectional strength. Bidirectional cloths have maximum load strengths in two perpendicular directions. Variations on weaves like a modified twill allow a more flexible cloth for better shaping around complex molds.

Mat – is omnidirectional strands of fiber compressed into a cloth. This is often held together with a resin soluble glue, which makes mat great at conforming to mold shapes without folding and bunching as it collapses when wetted. Because the strands do not align, fiber strength is the same in all directions.

Woven Roving – a heavier cloth made from larger bundles of strands. Woven roving allows for quicker buildup of material and strand weight.

Most FRP layups include multiple layers of different cloth and mat. Finished layers may be finer cloth over courser cloth, over woven roving and mat.

Three primary resins are in common use in marine construction – polyester , vinylester , and epoxy . All resins have materials safety concerns and require care in their use and handling.

Polyester is the least expensive and requires breathing protection because of the VOC emission (Volatile Organic Compounds…nasty, smelly fumes). It doesn’t have good bonding/gluing capability, and should only be used with glass fibers for structural building. Some polyester resins are referred to as “isophthalic” resins.

Vinylester is chemically similar to a hybrid of polyester and epoxy, and performs best with fiberglass. It shouldn’t be used in high strength applications with carbon or aramid fibers. It has some adhesive qualities which polyester lacks, it shrinks less during curing, and has better impact resistance.

The added strength of vinylester coupled with increased water resistance makes it an attractive option for many catamaran builders. It costs less than epoxy, but still has better performance than polyester.

Epoxy is the most expensive, but is three times the strength of the others. It offers the best adhesion and the only resin for building structural elements with carbon and aramid. It resists water intrusion better than the other resins, resists blisters, emits no VOCs, and shrinks less. The major drawback is it is more brittle if it takes an impact.

While epoxy is “the best” in terms of strength and ease of building, there are many applications where other resins are appropriate. Budget is a big driver – a boat made from E-Glass doesn’t need epoxy resin, and considerable cost savings to meet a construction price target may drive the choice.

They can build quality boats from all material combinations, but price and performance will drive materials choices to keep some boats more affordable.

2. Cored Construction

What’s the best way to make fiberglass strong? To a point, you can make it thicker. As it gets thicker, it gets heavier. A hollow shape can take more compressive load than a solid one of the same weight, and the same principle applies to fiberglass construction.

Consider an I-Beam used in building construction. It has the same strength (or more) as a solid rectangular beam of similar mass. The compressive load on the beam is supported by the outside edges of the material, the metal in the middle doesn’t contribute much to the strength. So we can remove metal to get the “I” shape while still keeping those sides rigid, making a lighter girder with less material.

The same principle applies to cored construction with fiberglass. Making a sandwich of two layers of fiberglass with a light core between them allows for the greater strength with weight savings.

There are drawbacks – the biggest risk is damage which breaks the skin, which can let water into the core. Earlier cored construction used materials prone to saturation and rot if they got wet. Some builders opt to do cored construction above the waterline and solid below to minimize some of these risks.

But the advantages in weight savings and increased stiffness offset the drawbacks, and there may be a few other side effects like sound and temperature insulation. Like resins and fibers, core materials offer distinct advantages, disadvantages and price points.

Most builders have adopted a hybrid approach, building solid hulls below the waterline, and cored hulls and decks above. This gives a balance of weight and safety.

A. Balsa Core

Balsa is light and inexpensive. The first cored construction used balsa, but it has the disadvantage of being wood. As a natural material, if it gets wet it can rot and break down. Builders use “end grain” balsa – shorter cross cut sections – to prevent wicking of water if there is an intrusion.

B. Foam Core

Closed cell foam cores give good strength to weight savings while minimizing water intrusion. If you get water in the core, it won’t spread very far. Divinycell is a popular PVC foam core, though there are several choices with different densities and compressive strengths.

Some foam cores are not suitable for heat treatment, but infused or vacuum bagged boats like the Outremer and PDQ do well with it.

C. Honeycomb

Honeycomb cores are often the most expensive, but also give some of the best strength to weight ratios. Honeycombed cells made from resin cured aramid papers are some of the best, but also among the most costly. They offer good stiffness, but can be hard to shape. Aluminum and other resin-infused papers are other core materials builders can choose from.

3. Construction and Resin

When building a hull, there are optimal ratios of fiber to resin saturation for target strength and weight. Too little resin and you may not have enough strength (or worse, voids and gaps), and too much, and you’re just adding weight without adding strength. Resins are also a significant material cost in building the boat, so over application not only increases weight but adds cost.

There are many ways to assemble the cores, fibers and resins to build a finished laminate hull – we’re addressing the most common in boat building. Each approach has strengths and limitations, and an impact on the bottom-line cost to build the boat. Any voids or air pockets in the laminate can be disastrous; these techniques have been developed to increase saturation and reduce the risk of voids.

A. Hand Layup / Open Molding

As the name implies, this is the application of resin by hand to cloth as it’s laid into a mold. Wetting is done with a brush, and the laminate is rolled out to remove any air pockets and voids. This is the simplest way to lay up fiberglass, but also the least precise and consistent and will use the most resin.

Skilled craftsmen have built some of the finest vessels in the world this way. Though it’s more popular with monohulls, which are less sensitive to weight, many catamarans built with hand layups on open molds are still out cruising and performing well.

B. Spraying

Using chopped-strand fiber mixed with resin, a “chopper gun” can spray the mixture into a mold to lay down the composite. A consistent thickness can be difficult, but this is a low cost construction technique which makes a very resin-rich laminate. Using sprayed fibers gives lower strength in all directions compared to meticulously laid down mat and bi-directional cloth. But it is a quick technique popular with mass produced, smaller boats.

It is an excellent technique for parts with complex geometry where weight is not an issue, but you will not see it often in catamaran construction. It’s heavy with resin without any resultant increase in strength.

C. Vacuum Bagging (Wet layup)

When an open molded component has been laid up and wetted with resin, vacuum bagging takes the process a step further. After the wetting is complete, air tight plastic bagging is secured around the wetted area, and the air is pumped out of the bag. The vacuum pulls excess resin out and collapses air pockets.

The goal is to get thorough wetting and produce as strong a laminate as possible without excess resin. Knysa and Leopard are two builders that use vacuum bagging on their hulls to reduce weight.

D. Resin Infusion

For resin infusion the cloth, matting and core is laid in place dry, then sealed in an air-tight bag. A vacuum pump attaches to one side of the bag, and on the other a feed for resin. The vacuum sucks the air out of the dry cloth stack, then pulls the resin through the stack, infusing and wetting it.

Resin infusion, when done right, gives the lightest, strongest laminates with no voids and the minimum resin weight for maximum strength. SCRIMP is a variant of the resin infusion process used by some builders, including TPI which build many early Lagoon cats.

E. Pre-preg

Using pre-preg (for “Pre Impregnated”) cloth for your laminating gets rid of the resin bucket. They manufacture cloth with a partially catalyzed resin pressed into it, then it’s chilled or frozen to stop the curing process. There is no need for seperately mixed resins, and there’s no worry your resin might “go off” and harden before you’re done wetting the cloth. Instead, the cloth is assembled, vacuumed, then heated to kick off the curing process.

There are both advantages and disadvantages to using pre-preg for your laminate work. The big disadvantage is the cost; it is most expensive material to use. You also need to chill and store the cloth until you need it, though some can be at room temperature for a couple of weeks without kicking off. And you need an oven which requires some clever tricks if you’re building a forty or fifty foot boat.

But the strength to weight ratio will always be perfect. High tech honeycomb cores are best suited to pre-preg lamination, and without racing against resin cure times, you can ensure perfect cloth placement and precise layout in the build process.

The primary use for pre-preg in boating is high performance race boats. With catamarans, pre-preg may be used high load parts, like Gunboat does for foils and rudders.

4. Industry Examples

Across the catamaran building industry you’ll find almost all the above techniques and materials used, though some are less common. You aren’t likely to find chopped strand sprayed layups in ocean going cats, and hand layups can lead to heavier hulls than weight sensitive catamaran designers prefer. Most manufacturers have moved to vacuum bagging or resin infusion, with a few of the highest end boats using pre-preg for key components.

Built by Robertson & Caine in South Africa, the hull material is vacuum bagged, end-grain balsa-cored E-glass with polyester.

Hand laid, bagged vinylester over an Airex foam core in the hulls.

Earlier Prout catamarans like the Snowgoose 34 featured hand laid solid FRP hulls and decks. Over time they switched to foam or balsa cores for decks and above the waterline.

Older PDQ boats were made from vacuum bagged vinylester – solid below the waterline and cored with CoreCell foam above the waterline and in decks. Newer PDQ models switched to epoxy resin.

All glass is vacuum bagged. Below the waterline is solid E-glass and vinylester. The rest is unidirectional, bidirectional, and triaxial cloths over a Nida-Core polypropylene honeycomb core with isophthalic and vinylester resins.

The Gemini cats are built with a solid hand layup of woven roving and fiberglass mat and polyester resin. Decks are cored with end grain balsa. The Gemini 3200 introduced vinylester resin into the layup to prevent blistering.

Older Lagoons were SCRIMP infused vinylester with and end grain balsa core above the waterline and in the decks.

Newer Lagoon catamarans use polyester and vinylester resins, also infused with balsa cores above the waterline and solid below.

With a carbon fiber inner skin, Catana also uses Twaron aramid fibers in the sandwiched hull over a foam core.

Fontaine Pajot

Primary hull construction is resin-infused vinylester with a balsa cored hull and deck.

Beneath the waterline, Outremer uses a single layer, solid vinylester laminate for safety. The hulls and deck are vinylester with a Divinycell foam core. They stiffen certain components with carbon for rigidity and durability.

Gunboat hulls are epoxy infused carbon fiber with a Nomex honeycomb core. They build dagger boards and other high load components with pre-preg carbon.

• Tags Buying Advice

By BJ Porter

Owner of Hallberg Rassy 53; world explorer.

3 replies on “Catamaran Construction – Hulls, Laminates, and Composites”

Excelent. Thank you for this I learned allot. Johan

Very straight forward information. Thankyou for doing this.

Damn…What an Amazingly Informative Article. *Cheers*

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Save my name, email, and website in this browser for the next time I comment.

A Trusted Source For Boating Information Since 2019

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.

We only recommend products we’ve tried/tested/own (that’s why you won’t find thousands of affiliate links on my site). If you have experience with one of the products we’ve mentioned, please share your experiences in the comments at the end.

Advertisement

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

Boating Gear

Take a look at our Recommended page for a variety of items. Here are some of the things you can expect:

• GPS And Fish Trackers
• Hitch And Trailer Supplies
• Lifejackets And Specialty Clothing
• Boating Books And More!

Crab Island by Pontoon: A Fun Watery Boating Guide Destination in 2023

Upgrade Your Boating Experience: Adding a Third Pontoon Made Easy!

How Long Does It Take A Canoe To Go… (Canoe Calculator Here)

In-Depth Review of the Pelican Sentinel 100X Fishing Kayak: Pros, Cons, and Performance

How To Put A Kayak In The Water – The Ultimate Guide For New Kayakers

Best Cruising Catamarans For Couples

More from boating guide magazine.

• Pontoon Boat Basics
• The Complete Runabout Boat & Trailer Towing Guide
• Winterizing Your Boat
• Boating Gear Requirements For Canada And USA Waters
• Aluminum vs. Fiberglass Bass Boats
• Better Boating At Night & How To Survive The Darkness
• Staying Safe On A Catamaran: 24 Essential Tips
• Can A Catamaran Capsize?
• 4 Common Types Of Propulsion For Boats

Return To Home * About Boating Guide * About The Author

fakewatches.is

Share this post with your friends

• Tags: boat type , catamaran , catamaran basics , catamaran essentials , sailing

Subscribe to our Newsletter

Join us in our love for all things water. And Adventure.

Everything You Need To Know About Boat Anchors (A Quick Read)

Most people enjoy being on boats. The smell of the water, the feel of the wind in your hair, and being around people you enjoy. It can make for a fun day. But at the end of the day, when you pull the boat back to shore, you will have to make sure that your boat stays in place. This is the job of the boat anchor.

Boat Trailer Tire Guide

Advertisement A boat trailer tire is something that is neglected by most everyday people. In other words, a tire is an underrated part. However, the main question arises that is a tire underrated, or is it just a myth? This section deals with the factors and facts that are related to the boat trailer tire.

Who Makes Each Brand of Catamaran and Where They’re Built

Advertisement Boating Guide Presents: Who Makes Each Brand of Catamaran and Where They’re Built. Catamarans are gaining popularity among seasoned sailors. Their speed and reliability made them the top choice for family cruises and long distances voyages. Let’s dig deeper into their fabrication, shall we? Among the acclaimed Catamaran brands is Lagoon, Privilege, Gemini, Bali,

Advertisement 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. 

Advertisement As an avid angler, I understand the importance of having a reliable and durable kayak to get where I need to go on the water. After much research, I decided to purchase the Pelican Sentinel 100X fishing kayak, which I can confidently say was an excellent decision. In this review, I’ll provide an in-depth

Comparison Between Trawler Vs Catamaran Boats  

Advertisement Looking for answers about trawler vs catamaran boats? You’re in the right place. Trawlers and catamarans are ideal sailing vessels for various use in terms of commercial transport, fisheries, sea patrols, research, and more. The distinct feature between the two boats is the hull composition. Trawlers consist of a single hull or monohull, while

Boat Information By Type

© 2023 Boating.Guide, A Hyperwave Media Group Ltd. Publication.

Privacy Overview

LAGOON PARTS

Authorized lagoon parts dealer.

With confirmed production methods, controlled costs, certified quality, Lagoon’s expertise combines attention to detail, creativity and industrial rigor.

Request a lagoon part

Please complete the form below and we will forward your request to the manufacturer. We will respond to you as soon as we receive a response from the manufacturer.

our parts department

At Multitech Marine, we have a highly knowledgeable and helpful team solely dedicated to getting you the parts you need to complete necessary repairs. 

(954) 522-1114 [email protected]

Ft. Lauderdale 1601 SW 20th St, Bay #CS5 Fort Lauderdale, FL, 33315

ANNAPOLIS, MD

Pier 7 Resort Marina

48 South River Rd S Edgewater, MD 21037

operating hours

Monday:          8:00am – 4:30pm Tuesday:         8:00am – 4:30pm Wednesday:  8:00am – 4:30pm Thursday:       8:00am – 4:30pm Friday:              8:00am – 4:30pm Saturday:       Closed Sunday:          Closed

My Cruiser Life Magazine

Illustrated Guide to Sailboat Parts [Updated 2023]

The lingo of sailing is baffling to many newcomers. While the actual sailing is pretty easy, it’s hard to wrap your mind around the bookwork when it seems like every little thing on a boat goes by its own nautical term. 

Here are a few names for parts of a sailboat that you might not have thought about before. For even more nautical word play, check out our complete guide to sailing terms .

Parts of Sailboat Hulls

The boat’s hull is its main body. Most are made of fiberglass, but there are a few aluminum sailboat models out there too. Wood is more traditional but more difficult to maintain than these modern alternatives. Sailboat hulls are displacement hulls, which means they sit low in the water and move relatively slowly. The hull’s job is to displace water, so you stay afloat!

Bow The forward “pointy end” of the boat.

Stern The rear end of the boat.

Transom If the stern of a boat has a flat section, it is called the transom. (I wrote about it in detail here: What Is the Transom on a Boat )

Canoe Stern or Double-Ender Some boats lack a transom; instead, their stern comes to a point like a bow. This is a “double ender” or a canoe stern.

Port and Starboard Sides Port is the left side, and starboard is the right side. 

Freeboard This is the height of the sides of the boat above the water.

Deck The upper portion of the boat that you walk on. 

Sheer Sheer is the curve of the deck when viewed from the side. Some boats have none, and some boats have a lot. 

Cabin Coach Roof Most sailboats have a raised coach roof on top of the cabin area.

Bottom of a Sailboat – Keels and Things

There are tons of parts on a sailboat that you only ever see if it’s out of the water. Boats are hauled out at boatyards by giant cranes, or a special machine called a travel lift . 

Keel The boat’s keel is the underwater feature that counters the effects of wind pressure on the sails. It keeps the boat from tipping over, but it also keeps the boat going in a straight line as it moves through the water. If a boat has no keel, the wind will push it downwind. 

A keel is heavy–it is weighted with thousands of pounds of ballast (usually lead). So when someone refers to a “keelboat,” they mean that it is a big boat with a weighted keel built for cruising. The built-in weight of a keel keeps the boat from capsizing. Also, the water flow over the curved surface of the keel helps the boat sail into the wind.

Smaller boats with centerboards or daggerboards are on the opposite end of the spectrum from keelboats. These aren’t weighted and could tip over (capsize) in the wrong conditions.

Types of Keels

Full Keel A classic and time-tested design, full keel boats are favorites among passage-making and ocean-crossing cruisers. They’re stable and comfortable at sea and very safe. However, they have a reputation for being slow compared to more modern designs.

Modified Full Keel The modification is a cut-away forefoot. That means it looks like a full keel, but there isn’t as much keel up near the bow. This reduces the underwater “wetted surface area” and makes the design a little bit faster while preserving the other good things about full keel designs.

Fin Keel The fin keel looks like a shark’s fin pointed downward. Some are narrow and very deep, while others are longer and shallow. Fin keels are bolted to the bottom of an otherwise flat-looking hull design. The fin has a foil shape that creates a lifting force as water flows over it. In addition to its ballasted weight, this opposes the sails and leeway. Most modern sailboats have some version of a fin keel.

Bulb Keel The ballast should be placed as low as possible to lower the boat’s center of gravity. The bulb keel is a fin keel with a lead bulb added to the bottom. The bulb has an efficient shape, making it more efficient than just the fin alone.

Wing Keel Like a bulb, a wing keel works by adding more weight and hydrodynamic force to the bottom of the keel. As a result, the wings look like a little airplane mounted on the bottom of a fin keel. 

Swing Keel A swing keel is a fin that pivots up and into the boat, meaning that you can have a very shallow draft when you are docking or anchoring but also a very deep draft when you are sailing in open waters. This heavy keel requires a powerful and complicated electric or hydraulic-electric system. 

Lifting Keel A lifting keel is similar to a swing keel, only the keel lifts up into the hull vertically. 

Bilge Keels A bilge keel boat has two fin keels mounted at 45-degree angles below the hull. The advantage is that the boat can “dry out.” This makes them very popular in harbors around England, where the massive tidal range means that the harbor is only mud for half the day. 

Centerboard Centerboards look like swing keels, but the “keel” part is just a board. It isn’t weighted with lead or iron, so it doesn’t change the ballast of the boat any. They are often found on smaller sailboats like sailing dinghies, but there are also large cruising boats that have full keels or long-fin keels with centerboards, too. 

Daggerboard A daggerboard is like a centerboard, only it doesn’t swing. Instead, it goes straight up and down like a dagger into its sheath. They’re not only common on very small sailing dinghies but also large cruising catamarans.

Canting Keel Canting keels are some of the latest technology items in racing, so they aren’t found on cruising boats yet. They move from side to side, allowing the crew to precisely control the forces made by the keel.

Types of Rudders – What Steers a Sailboat

As with keels, you’ll see various types of rudders on sailboats. The rudder is one of the most critical parts of a sailboat’s equipment, so the differences in rudders are mostly about how protected it is from damage.

Rudder The rudder is the thing that steers the sailboat. It’s mounted on the back of the boat, sometimes looking a bit like a second keel. When the operator turns the steering wheel or tiller, it moves the rudder one way or the other. That, in turn, turns the yacht’s bow left or right. 

Transom-Hung Rudder The most basic type of rudder is hung on the transom. It’s usually controlled with a tiller instead of a wheel. You can see a transom-hung rudder above the water.

Keel-Mounted Rudder On a full keel boat, the rudder will be mounted on the back edge of the keel. This protects it completely from damage since anything the boat might hit will hit the keel first. 

Skeg-Mounted Rudder The rudder might be mounted to a skeg if a boat has a fin keel. A skeg is a small fixed surface that holds the rudder and supports it. In the case of a full skeg, it also protects the rudder as a full keel would.

Spade Rudder Spade rudders have no skeg, so the entire underwater surface moves when you turn the wheel. Most modern yachts have spade rudders because they are incredibly effective. They are easily damaged, however, which is why some offshore sailors still prefer skeg-hung rudders.

Bottom of Sail Boat – Running Gear

Running gear is the generic name given to all equipment under the boat that connects to the engine and moves the boat under power. It consists of the propeller, prop shaft, and supports. 

Propeller Also called the prop or screw, the prop is what converts the engine power into thrust. The water flow over its blades creates a pushing force that moves the boat. Since the sailboat doesn’t use the propeller when it is sailing, sailboats often have folding or feathering props that stop moving.

Prop Shaft The metal shaft that connects the engine to the propeller is called the prop shaft. 

Cutlass Bearing Where the prop shaft exits the hull, a rubber cutlass bearing keeps it centered and rotating freely. 

Saildrive A saildrive is a common arrangement on modern sailboats that uses a vertical drive leg with the propeller. The saildrive installs on the back of the engine and includes the transmission. It’s like the lower unit of an outboard motor, but you cannot raise it out of the water. 

Up Top – Types of Sailboat Designs

Aft Cockpit The “classic” design of the modern sailboat, if there is such a thing, is called the aft cockpit. This layout has the cockpit in the rear-most section of the hull, behind the cabin.

Center Cockpit The center cockpit sailboat has the cockpit closer to the mast. That leaves a lot of space in the rear of the hull for a huge stateroom. This design means that the cockpit will be closer to the boat’s center, making handling easier. But it is also higher, making more windage and motion at sea. 

Pilot House A pilot house sailboat has a second helm inside a protected area. These are popular in colder climates, where the pilot house provides a warm place to steer the boat from. The rear cockpit is usually smaller than a typical aft cockpit, but it’s still where the sail handling occurs. A pilot house has a raised level, so the salon typically surrounds the interior helm to utilize that space and visibility when not underway.

Deck Salon Like a pilot house, a deck salon has big windows and better visibility than a typical sailboat cabin. But it lacks a true interior helm. Many, however, have nav stations with forward visibility and autopilot controls, making it a comfortable place to sit and keep watch during a passage. 

Flush Deck Most sailboats have a raised coach roof where the interior cabin is. But some designers make their decks flush with the sides of the boat, making a wide open deck that is easy to move around on. 

On Deck Sailboat Components – Sailboat Front

The deck of a sailboat is all about safety at sea. Most modern cruising boats are rigged such that there are few things you might need to go “out on deck” or “go forward” for. Instead, these things are rigged back to the cockpit, so you can stay safe and dry while doing your thing.

Since the wet pitching deck of a sailboat at sea is tricky, many of the things you’ll find there are safety-related.

Handholds Places to grab should be located all over the boat, so there’s never a risk of not having something to hold onto to stabilize yourself.

Lifelines Lifelines run the perimeter of the boat and provide a last-ditch safety device. You can grab them, and they should be high enough that they’ll keep you from going overboard. 

Stantions The stands that lifelines attach to.

Bow Pulpit The solid rail around the front of the boat provides a safe handhold and a starting point for the lifelines.

Stern Pushpit The same, but on the stern of the boat.

Bulwarks The raised edges of the deck on the sides so that you can’t slip overboard on accident.

No-Skid Decks In areas where people will be walking, the deck is treated with a special product to make the deck “no-skid.” That way, it isn’t slippery, even when wet.

Harness Sailing harnesses are designed to clip onto the boat and keep a sailor onboard even if the boat takes a huge wave or the sailor slips. The harness is the staple of offshore safety. 

Jack Lines Jack lines are temporary lines secured on the deck where sailors can attach their harnesses. 

Safety Rails Many boats also have extra rails and handholds located in spots where sailors might work on deck, like around the base of the mast.

At the bow of the sailboat, you’ll find her ground tackle.

Bowsprit The bowsprit is the spar that extends from the deck forward of the bow. They’re used on sailboats to gain more sail area since getting the sail farther forward means you can fit a bigger sail. Some have just a spar, while others have a bow platform that is part of the deck.

Ground Tackle  The generic word for the anchor, chain, and all the equipment needed to use it.

Anchor The anchor is “the hook” that digs into the seabed and keeps the boat in the same place. Anchors are safety devices since they allow you to stop in shallow water. But they also provide access to areas with no marinas since you can anchor offshore and go in on your dinghy. 

Windlass A winch that pulls up the anchor and chain. They can be manual, with a handle, or electric, with a button.

Anchor Rode The generic name for the anchor line. It can be a chain or rope.

Snubber A short length of rope that attaches to the chain to secure it to the boat. 

Cleat A horn-shaped piece of deck hardware used to secure a line or rope. 

Dorade A large vent opening on the deck of a boat which is designed to let air in but not water.

Hatch Hatches are upward-facing windows that you can open to increase ventilation in the cabin.

Locker A generic term for a cabinet or compartment on a boat. 

Going Aloft – Basic Boat Parts of a Sailing Rig

The rig of a boat is the mast and all of its associated parts. If you’re wondering about the many different kinds of rigs that are out there, check out our rundown on sailing terms . There you’ll find definitions for boats with just one mast or multiple masts, like sloop rig and what a boat with two sails in front might be called. It’s a cutter, if you’re wondering.

Spar A generic name for a mast, boom, or any other long pole used to hold a sail. It can be wood or metal or vertical or horizontal. 

Mast A vertical spar upon which a sail is hoisted.

Boom A horizontal pole that holds a sail and gives it shape. 

Standing Rigging The wires or rope that holds the mast upright. 

Stay Standing rigging that goes fore to aft. The head stay runs from the masthead to the bow, and the backstay runs from the masthead to the stern.

Shroud Standing rigging that goes to the sides of the boat. From the masthead to each side runs a cap shroud. Some masts also have intermediate and lower shrouds.

Running Rigging All lines that are used for sail handling are called running rigging. 

Halyard A halyard hoists a sail to the top. Each halyard is named for the sail it hoists, i.e., main halyard, jib halyard, spinnaker halyard.

Sheet The sheet controls the sail. If you ease the sheet, the sail is loosened. If you winch the sheet in, it is tightened. Like all running rigging, each sheet is named for the sail it controls, i.e., main sheet, jib sheet, etc.

Traveler If a sail has a boom, the traveler can be used to adjust it from side to side. The sheet is attached to the traveler. Most main sail travelers are located near or in the cockpit.

Gooseneck Fitting The articulating attachment that holds a boom on a mast.

Topping Lift A line that holds the rear end of a boom up. It runs from the masthead to the boom. 

Vang A control line pulls the boom down and puts pressure on the sail to keep it flatter. Large boats may have hydraulic or solid vangs.

Blocks The rest of the world would call this a pulley, but sailors call it a block.

Fairleads Deck organizers that keep the lines tidy and running in the direction they should go on deck.

Furler Wraps the sail around the stay so that it doesn’t not have to be raised and lowered each time. Instead, you pull on the sheet and the sail unrolls or “unfurls.”

On Deck – Back of Sailboat

On most boats, the cockpit is located at the back. 

Cockpit The main operations center and party central on a sailboat. This is where the skipper sits at the helm, and the linesmen control the sheets.

Coaming The cockpit is protected from waves and splashes by the coaming, the tall walls that enclose it. It also makes the cockpit safe since you are unlikely to get swept overboard from here.

Lazarette The main storage locker in the cockpit.

Helm The station where the skipper steers the boat from. 

Tiller If a boat doesn’t have a wheel, it will have a tiller. A tiller is just a handle connected to the rudder, and the skipper pushes or pulls it to steer. Even if a boat has a wheel, it probably has an emergency tiller in case the steering system breaks.

Winch Winches provide a mechanical advantage to make it easier to haul in lines. In the cockpit, all the sheets have winches.

Rope Clutch A clutch locks a rope in place so it can be taken off a winch, even when loaded.

Jammer A jammer does the same as a clutch, but it’s a simpler device found on smaller boats.

Weathervane Steering A weathervane is used to steer the boat like an autopilot but uses wind direction and mechanical linkages. As a result, they use no power and never complain about their workload. They mount on the stern of the boat and are controlled by simple lines to the cockpit. Windvanes are often referred to by their brand name, i.e., Monitor or Hydrovane

Davits Arms on the back of the boat that lift the dinghy or tender. 

Swim Platform A flat area on the transom that allows you easy access in and out of the water. A standard feature on newer boats but not on older ones that just had long swim ladders.

Catamaran Sailboat Parts Explained

For the most part, the components of a catamaran share the same terms and labels that they would on a monohull. Cats often have a few extra features with other names, however.

Hulls A catamaran is made with two hulls connected together. Each hull has an interior, just like a monohull sailboat does. The cabins and heads are usually located in the hulls, and sometimes the galley is also down below.

Owner’s Version A catamaran layout that is made for private owners. Usually, one hull will be dedicated to the owner’s stateroom with a private door, a huge head with a walk-in shower, and a large berth.

Charter Version It has more staterooms and heads than an owner’s version does. Usually, a charter cat has at least two staterooms and heads in each hull.

Bridge Deck The deck connects the two hulls, which usually has the salon and cockpit. If the design is “galley up,” the galley will be on the bridgedeck with the salon.

Cockpit Just like on a monohull, the cockpit is the operations center. But catamarans have huge cockpits, and there is usually a large outdoor dining table and entertainment area as well.

Forward Cockpit Some designs have lounge seating forward of the salon on the bridgedeck.

Flybridge Some designs have the main helm mounted on top of the salon on an upper level. It’s almost the catamaran equivalent of a center cockpit.

Trampolines Forward of the salon, the bridge deck stops, and a trampoline connects the hulls over the water. This is a great place to hang out, but it’s an integral safety feature for a catamaran. The trampolines allow any water to immediately drain away, not weighing the boat down on the bow. This prevents a pitchpole when a boat capsizes by tipping forward into the water.

Cross Beam and Dolphin Striker Since there is no center bow to mount the head stay and foresail, catamarans use a cross beam that connects the hull. A piece of rigging keeps this in place, and it’s called the dolphin striker. No dolphins were hurt in the rigging of these boats, however.

Anchor Bridle Instead of a single snubber line on the anchor, catamarans use a wide bridle that connects each hull bow to the anchor line.

Parts of a Sail Boat FAQs

What are parts of a sailboat called.

Sailing is a challenging hobby, and one reason it’s so difficult for beginners is because every part of a sailboat has its own name. From each wire and rope to every piece of deck hardware, a beginner must learn the basics before they can even start.

What is the front part of a sailboat called?

The front part of a sailboat is called the bow. Many boats also have a spar extending forward of the hull, called the bowsprit.

What are the 5 basic parts of every sailboat?

Every sailboat has at least these five parts, but most boats have many more.  Hull Keel Rudder Rigging Sails

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

Leave a comment

Your email address will not be published. Required fields are marked *

Save my name, email, and website in this browser for the next time I comment.

Catamaran Sailing

Battens & Accessories (48)

What To Wear (31)

Blocks (113)

Boots, Gloves & Hats (43)

Cleats (46)

Convenience Items (64)

Cordage (61)

Covers (19)

Downhauls (33)

Fairleads & Sheaves (37)

Fasteners & Tools (195)

Hiking Sticks (20)

Hobie 16 Favorites (88)

Hobie Cat Factory Parts (460)

Jib Halyard & Sheeting Components (35)

Mainsheet Hardware (41)

Maintenance (29)

Mast Rotation & Stepping (39)

Miscellaneous (12)

Nacra & Inter Factory Parts (133)

Non-Skid Traction (9)

Ports & Accessories (13)

Prindle Factory Parts (111)

Regatta (6).

Rigging (229)

Righting Systems (16)

Roller Furling & Spinnaker Hardware (20)

Rudders, Boards & Components (77)

Safety (31)

Sail Accessories (42)

Spare & Replacement Parts (73)

Trampolines & Accessories (80)

Transport & Storage (34)

Trapeze Accessories (37)

Trapeze Harnesses & Hooks (20)

Travelers (40)

Used Cat Parts (7)

Videos & Books (26)

Wind Indicators (11)

Maintenance underway. Pardon our dust. Dismiss

Sailboat Parts Explained: Illustrated Guide (with Diagrams)

When you first get into sailing, there are a lot of sailboat parts to learn. Scouting for a good guide to all the parts, I couldn't find any, so I wrote one myself.

Below, I'll go over each different sailboat part. And I mean each and every one of them. I'll walk you through them one by one, and explain each part's function. I've also made sure to add good illustrations and clear diagrams.

This article is a great reference for beginners and experienced sailors alike. It's a great starting point, but also a great reference manual. Let's kick off with a quick general overview of the different sailboat parts.

General Overview

The different segments

You can divide up a sailboat in four general segments. These segments are arbitrary (I made them up) but it will help us to understand the parts more quickly. Some are super straightforward and some have a bit more ninja names.

Something like that. You can see the different segments highlighted in this diagram below:

The hull is what most people would consider 'the boat'. It's the part that provides buoyancy and carries everything else: sails, masts, rigging, and so on. Without the hull, there would be no boat. The hull can be divided into different parts: deck, keel, cabin, waterline, bilge, bow, stern, rudder, and many more.

I'll show you those specific parts later on. First, let's move on to the mast.

Sailboats Explained

The mast is the long, standing pole holding the sails. It is typically placed just off-center of a sailboat (a little bit to the front) and gives the sailboat its characteristic shape. The mast is crucial for any sailboat: without a mast, any sailboat would become just a regular boat.

I think this segment speaks mostly for itself. Most modern sailboats you see will have two sails up, but they can carry a variety of other specialty sails. And there are all kinds of sail plans out there, which determine the amount and shape of sails that are used.

The Rigging

This is probably the most complex category of all of them.

Rigging is the means with which the sails are attached to the mast. The rigging consists of all kinds of lines, cables, spars, and hardware. It's the segment with the most different parts.

The most important parts

If you learn anything from this article, here are the most important parts of any sailboat. You will find all of these parts in some shape or form on almost any sailboat.

Okay, we now have a good starting point and a good basic understanding of the different sailboat parts. It's time for the good stuff. We're going to dive into each segment in detail.

Below, I'll go over them one by one, pointing out its different parts on a diagram, listing them with a brief explanation, and showing you examples as well.

After reading this article, you'll recognize every single sailboat part and know them by name. And if you forget one, you're free to look it up in this guide.

On this page:

The hull is the heart of the boat. It's what carries everything: the mast, the sails, the rigging, the passengers. The hull is what provides the sailboat with its buoyancy, allowing it to stay afloat.

Sailboats mostly use displacement hulls, which is a shape that displaces water when moving through it. They are generally very round and use buoyancy to support its own weight. These two characteristics make sure it is a smooth ride.

There are different hull shapes that work and handle differently. If you want to learn more about them, here's the Illustrated Guide to Boat Hull Types (with 11 Examples ). But for now, all we need to know is that the hull is the rounded, floating part of any sailboat.

Instead of simply calling the different sides of a hull front, back, left and right , we use different names in sailing. Let's take a look at them.

The bow is the front part of the hull. It's simply the nautical word for 'front'. It's the pointy bit that cuts through the water. The shape of the bow determines partially how the boat handles.

The stern is the back part of the hull. It's simply the nautical word for 'back'. The shape of the stern partially determines the stability and speed of the boat. With motorboats, the stern lies deep inside the water, and the hull is flatter aft. Aft also means back. This allows it to plane, increasing the hull speed. For sailboats, stability is much more important, so the hull is rounded throughout, increasing its buoyancy and hydrodynamic properties.

The transom is the backplate of the boat's hull. It's the most aft (rear) part of the boat.

Port is the left side of a sailboat.

Starboard is the right side of a sailboat

The bilges are the part where the bottom and the sides of the hull meet. On sailboats, these are typically very round, which helps with hydrodynamics. On powerboats, they tend to have an angle.

The waterline is the point where the boat's hull meets the water. Generally, boat owners paint the waterline and use antifouling paint below it, to protect it from marine growth.

The deck is the top part of the boat's hull. In a way, it's the cap of the boat, and it holds the deck hardware and rigging.

Displacement hulls are very round and smooth, which makes them very efficient and comfortable. But it also makes them very easy to capsize: think of a canoe, for example.

The keel is a large fin that offsets the tendency to capsize by providing counterbalance. Typically, the keel carries ballast in the tip, creating a counterweight to the wind's force on the sails.

The rudder is the horizontal plate at the back of the boat that is used to steer by setting a course and maintaining it. It is connected to the helm or tiller.

Tiller or Helm

• The helm is simply the nautical term for the wheel.
• The tiller is simply the nautical term for the steering stick.

The tiller or helm is attached to the rudder and is used to steer the boat. Most smaller sailboats (below 30') have a tiller, most larger sailboats use a helm. Large ocean-going vessels tend to have two helms.

The cockpit is the recessed part in the deck where the helmsman sits or stands. It tends to have some benches. It houses the outside navigation and systems interfaces, like the compass, chartplotter, and so on. It also houses the mainsheet traveler and winches for the jib. Most boats are set up so that the entire vessel can be operated from the cockpit (hence the name). More on those different parts later.

Most larger boats have some sort of roofed part, which is called the cabin. The cabin is used as a shelter, and on cruising sailboats you'll find the galley for cooking, a bed, bath room, and so on.

The mast is the pole on a sailboat that holds the sails. Sailboats can have one or multiple masts, depending on the mast configuration. Most sailboats have only one or two masts. Three masts or more is less common.

The boom is the horizontal pole on the mast, that holds the mainsail in place.

The sails seem simple, but actually consist of many moving parts. The parts I list below work for most modern sailboats - I mean 90% of them. However, there are all sorts of specialty sails that are not included here, to keep things concise.

The mainsail is the largest sail on the largest mast. Most sailboats use a sloop rigging (just one mast with one bermuda mainsail). In that case, the main is easy to recognize. With other rig types, it gets more difficult, since there can be multiple tall masts and large sails.

If you want to take a look at the different sail plans and rig types that are out there, I suggest reading my previous guide on how to recognize any sailboat here (opens in new tab).

Sail sides:

• Leech - Leech is the name for the back side of the sail, running from the top to the bottom.
• Luff - Luff is the name for the front side of the sail, running from the top to the bottom.
• Foot - Foot is the name for the lower side of the sail, where it meets the boom.

Sail corners:

• Clew - The clew is the lower aft (back) corner of the mainsail, where the leech is connected to the foot. The clew is attached to the boom.
• Tack - The tack is the lower front corner of the mainsail
• Head - The head is the top corner of the mainsail

Battens are horizontal sail reinforcers that flatten and stiffen the sail.

Telltales are small strings that show you whether your sail trim is correct. You'll find telltales on both your jib and mainsail.

The jib is the standard sized headsail on a Bermuda Sloop rig (which is the sail plan most modern sailboats use).

As I mentioned: there are all kinds, types, and shapes of sails. For an overview of the most common sail types, check out my Guide on Sail Types here (with photos).

The rigging is what is used to attach your sails and mast to your boat. Rigging, in other words, mostly consists of all kinds of lines. Lines are just another word for ropes. Come to think of it, sailors really find all kinds of ways to complicate the word rope ...

Two types of rigging

There are two types of rigging: running and standing rigging. The difference between the two is very simple.

• The running rigging is the rigging on a sailboat that's used to operate the sails. For example, the halyard, which is used to lower and heave the mainsail.
• The standing rigging is the rigging that is used to support the mast and sail plan.

Standing Rigging

Here are the different parts that belong to the standing rigging:

• Forestay or Headstay - Line or cable that supports the mast and is attached to the bow of the boat. This is often a steel cable.
• Backstay - Line or cable that supports the mast and is attached to the stern of the boat. This is often a steel cable.
• Sidestay or Shroud - Line or cable that supports the mast from the sides of the boat. Most sailboats use at least two sidestays (one on each side).
• Spreader - The sidestays are spaced to steer clear from the mast using spreaders.

Running Rigging: different words for rope

Ropes play a big part in sailing, and especially in control over the sails. In sailboat jargon, we call ropes 'lines'. But there are some lines with a specific function that have a different name. I think this makes it easier to communicate with your crew: you don't have to define which line you mean. Instead, you simply shout 'mainsheet!'. Yeah, that works.

Running rigging consists of the lines, sheets, and hardware that are used to control, raise, lower, shape and manipulate the sails on a sailboat. Rigging varies for different rig types, but since most sailboats are use a sloop rig, nearly all sailboats use the following running rigging:

• Halyards -'Halyard' is simply the nautical name for lines or ropes that are used to raise and lower the mainsail. The halyard is attached to the top of the mainsail sheet, or the gaffer, which is a top spar that attaches to the mainsail. You'll find halyards on both the mainsail and jib.
• Sheets - 'Sheet' is simply the nautical term for lines or ropes that are used to set the angle of the sail.
• Mainsheet - The line, or sheet, that is used to set the angle of the mainsail. The mainsheet is attached to the Mainsheet traveler. More on that under hardware.
• Jib Sheet - The jib mostly comes with two sheets: one on each side of the mast. This prevents you from having to loosen your sheet, throwing it around the other side of the mast, and tightening it. The jib sheets are often controlled using winches (more on that under hardware).
• Cleats are small on-deck hooks that can be used to tie down sheets and lines after trimming them.
• Reefing lines - Lines that run through the mainsail, used to put a reef in the main.
• The Boom Topping Lift is a line that is attached to the aft (back) end of the boom and runs to the top of the mast. It supports the boom whenever you take down the mainsail.
• The Boom Vang is a line that places downward tension on the boom.

There are some more tensioning lines, but I'll leave them for now. I could probably do an entire guide on the different sheets on a sailboat. Who knows, perhaps I'll write it.

This is a new segment, that I didn't mention before. It's a bit of an odd duck, so I threw all sorts of stuff into this category. But they are just as important as all the other parts. Your hardware consists of cleats, winches, traveler and so on. If you don't know what all of this means, no worries: neither did I. Below, you'll find a complete overview of the different parts.

Deck Hardware

Just a brief mention of the different deck hardware parts:

• Pulpits are fenced platforms on the sailboat's stern and bow, which is why they are called the bow pulpit and stern pulpit here. They typically have a solid steel framing for safety.
• Stanchons are the standing poles supporting the lifeline , which combined for a sort of fencing around the sailboat's deck. On most sailboats, steel and steel cables are used for the stanchons and lifelines.

Mainsheet Traveler

The mainsheet traveler is a rail in the cockpit that is used to control the mainsheet. It helps to lock the mainsheet in place, fixing the mainsails angle to the wind.

If you're interested in learning more about how to use the mainsheet traveler, Matej has written a great list of tips for using your mainsheet traveler the right way . It's a good starting point for beginners.

Winches are mechanical or electronic spools that are used to easily trim lines and sheets. Most sailboats use winches to control the jib sheets. Modern large sailing yachts use electronic winches for nearly all lines. This makes it incredibly easy to trim your lines.

You'll find the compass typically in the cockpit. It's the most old-skool navigation tool out there, but I'm convinced it's also one of the most reliable. In any way, it definitely is the most solid backup navigator you can get for the money.

Want to learn how to use a compass quickly and reliably? It's easy. Just read my step-by-step beginner guide on How To Use a Compass (opens in new tab .

Chartplotter

Most sailboats nowadays use, besides a compass and a map, a chartplotter. Chartplotters are GPS devices that show a map and a course. It's very similar to your normal car navigation.

Outboard motor

Most sailboats have some sort of motor to help out when there's just the slightest breeze. These engines aren't very big or powerful, and most sailboats up to 32' use an outboard motor. You'll find these at the back of the boat.

Most sailboats carry 1 - 3 anchors: one bow anchor (the main one) and two stern anchors. The last two are optional and are mostly used by bluewater cruisers.

I hope this was helpful, and that you've gained a good understanding of the different parts involved in sailing. I wanted to write a good walk-through instead of overwhelming you with lists and lists of nautical terms. I hope I've succeeded. If so, I appreciate any comments and tips below.

I've tried to be as comprehensive as possible, without getting into the real nitty gritty. That would make for a gigantic article. However, if you feel I've left something out that really should be in here, please let me know in the comments below, so I can update the article.

I own a small 20 foot yacht called a Red witch made locally back in the 70s here in Western Australia i found your article great and enjoyed reading it i know it will be a great help for me in my future leaning to sail regards John.

David Gardner

İ think this is a good explanation of the difference between a ”rope” and a ”line”:

Rope is unemployed cordage. In other words, when it is in a coil and has not been assigned a job, it is just a rope.

On the other hand, when you prepare a rope for a specific task, it becomes employed and is a line. The line is labeled by the job it performs; for example, anchor line, dock line, fender line, etc.

Hey Mr. Buckles

I am taking on new crew to race with me on my Flying Scot (19ft dingy). I find your Sailboat Parts Explained to be clear and concise. I believe it will help my new crew learn the language that we use on the boat quickly without being overwhelmed.

PS: my grandparents were from Friesland and emigrated to America.

Thank you Shawn for the well written, clear and easy to digest introductory article. Just after reading this first article I feel excited and ready to set sails and go!! LOL!! Cheers! Daniel.

steve Balog

well done, chap

Great intro. However, the overview diagram misidentifies the cockpit location. The cockpit is located aft of the helm. Your diagram points to a location to the fore of the helm.

William Thompson-Ambrose

An excellent introduction to the basic anatomy and function of the sailboat. Anyone who wants to start sailing should consider the above article before stepping aboard! Thank-you

James Huskisson

Thanks for you efforts mate. We’ve all got to start somewhere. Thanks for sharing. Hoping to my first yacht. 25ft Holland. Would love to cross the Bass Strait one day to Tasmania. 👌 Cheers mate

Alan Alexander Percy

thankyou ijust aquired my first sailboat at 66yrs of age its down at pelican point a beautifull place in virginia usa my sailboat is a redwing 30 if you are ever in the area i wouldnt mind your guidance and superior knowledge of how to sail but iam sure your fantastic article will help my sailboat is wings 30 ft

Thanks for quick refresher course. Having sailed in California for 20+ years I now live in Spain where I have to take a spanish exam for a sailboat license. Problem is, it’s only in spanish. So a lot to learn for an old guy like me.

Very comprehensive, thank you

Your article really brought all the pieces together for me today. I have been adventuring my first sailing voyage for 2 months from the Carolinas and am now in Eleuthera waiting on weather to make the Exumas!!! Great job and thanks

Helen Ballard

I’ve at last found something of an adventure to have in sailing, so I’m starting at the basics, I have done a little sailing but need more despite being over 60 life in the old dog etc, thanks for your information 😊

Barbara Scott

I don’t have a sailboat, neither do l plan to literally take to the waters. But for mental exercise, l have decided to take to sailing in my Bermuda sloop, learning what it takes to become a good sailor and run a tight ship, even if it’s just imaginary. Thank you for helping me on my journey to countless adventures and misadventures, just to keep it out of the doldrums! (I’m a 69 year old African American female who have rediscovered why l enjoyed reading The Adventures of Robert Louis Stevenson as well as his captivating description of sea, wind, sailboat,and sailor).

Great article and very good information source for a beginner like me. But I didn’t find out what I had hoped to, which is, what are all those noisy bits of kit on top of the mast? I know the one with the arrow is a weather vane, but the rest? Many thanks, Jay.

Louis Cohen

The main halyard is attached to the head of the mainsail, not the to the mainsheet. In the USA, we say gaff, not gaffer. The gaff often has its own halyard separate from the main halyard.

Other than that it’s a nice article with good diagrams.

A Girl Who Has an Open Sail Dream

Wow! That was a lot of great detail! Thank you, this is going to help me a lot on my project!

Hi, good info, do u know a book that explains all the systems on a candc 27,

Emma Delaney

As a hobbyist, I was hesitant to invest in expensive CAD software, but CADHOBBY IntelliCAD has proven to be a cost-effective alternative that delivers the same quality and performance.

https://www.cadhobby.com/

Leave a comment

You may also like, 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.

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

The Illustrated Guide To Boat Hull Types (11 Examples)

How To Live On a Boat For Free: How I'd Do It

How To Live on a Sailboat: Consider These 5 Things

Own your first boat within a year on any budget.

A sailboat doesn't have to be expensive if you know what you're doing. If you want to learn how to make your sailing dream reality within a year, leave your email and I'll send you free updates . I don't like spam - I will only send helpful content.

Ready to Own Your First Boat?

Just tell us the best email address to send your tips to:

sailing parts

THE WORLD'S FAVORITE PORTABLE SAIL BOAT THAT FITS IN YOUR CAR

• parts & accessories

Based on the needs and requirements of our customers and with MiniCat being on the market for over 15 years we have created an extensive list of spare sailing parts and accessories for all our models. This sailing parts and accessories are constantly being updated and we try to offer new items every year.

The most popular and sold accessories for all models are: additional trampoline to extend the space and put your extra luggage on, transport trolley which helps you to move your boat, the windflag to put on the top on the mast to indicate the wind, the telescopic paddle, the trapeze set and the inflatable seats.

To save on shipping costs we recommend you to choose and order your accessories at the same time as your MiniCat.

• minicat guppy
• minicat 310
• minicat 420
• minicat 460

ROLLING SAIL GENNA

PROTECTIVE COVER

TRANSPORT TROLLEY

ENGINE SUPPORT

ADDITIONAL TRAMPOLINE

INFLATABLE SEATS

CARBON MAST

MiniCat Bag with Wheels

TRAPEZE SET

PERSONAL FLOATING DEVICE

TELESCOPIC PADDLE

TWO SMALLER BAGS

PRESSURE GAUGE

RECHARGABLE ELECTRIC PUMP

ELECTRIC PUMP POWERED BY CAR BATTERY

MAINTENANCE KIT

TELEPHONE CASE

WATERPROOF SACK

FLOAT SUPPORT

WATERPROOF MINICAT BAG

How to assemble.

MiniCat GUPPY was first introduced in early 2018 and since then we sold over 400 pieces and it proved to be a fantastic boat ...

We have only been offering this sail for one year and already it has proved to be a bestseller ...

There are few 2021 demo boats left from shows, exhibitions and our latest photo shooting in Italy ...

Last year we came up with the brand MiniCat 310 Sport and customers are loving it. The new generation of 310 with brand new design ...

We had to wait for two long years before we could organize our lovely MiniCat Fun Festival and although it was long - it was worth the wait ...

When we decided together with Laura to hold a timed auction to sell her old MiniCat 420 ...

The all-new ‘MiniCat 460 Elite’ is a high-tech edition to the largest category of the MiniCat portable sailboat ...

• storage solution
• transport solution
• minicat for campers
• minicat for yachts
• latest news
• minicat factory
• minicat events
• laura dekker
• laura dekker's foundation
• testimonials
• minicat as tender
• used boats for sale
• distributor map

What Is a Catamaran? Things You Need to Know

As an Amazon Associate, we earn from qualifying purchases. We may also earn commissions if you purchase products from other retailers after clicking on a link from our site.

Whether you’re a sailing enthusiast or have recently adopted an interest in yachts, you’ve probably heard of catamarans. It can be confusing as the term seems to describe boats, ships, and even massive-cruise vessels. So, what is a catamaran?

A catamaran is a boat with two hulls and a bridge between them. Catamarans can be designed as sailboats or motorboats. A catamaran stays stable since it has a wide base, it does not have a deep keel as on a monohull . Cats are known for not heeling, increased comfort, more space, and faster speeds.

In this article, we will explore everything you need to know about this design, including its origin and its advantages.

Table of Contents

Catamaran: A Basic Overview

The term catamaran comes from a 17th-century Tamil term kaṭṭumaram . The Tamil word stands for “tied wood,” but those vessels do not share the same working principle as catamarans. 

Even though most “tied wood” rafts in the 17th century India used two logs to keep the deck afloat, the logs acted more like pontoons than catamaran hulls. However, the commonality of two logs translated to catamarans, as these vessels generally have two hulls.

Since the term refers to the design, it is correct to refer to any vessel with two hulls connected by a bridge as a catamaran. However, technical accuracy doesn’t necessarily mean general-use correctness. While cruise ships can have catamaran design and small rafts may feature two hulls, the term is most often used for yacht-sized cruising sailboats.

Buyers who would not previously afford any vessel close to a mid-sized yacht can easily order a brand-new catamaran. Even investors interested in collecting income from catamaran renting opt for medium scale catamarans to hedge against depreciation and damage. Therefore, the term catamaran has become synonymous with medium-scale yachts with two hulls.

For the rest of this article, we’ll use the term to reflect these vessels, and if a catamaran-style cruise-ship or smaller boats are brought up, the distinction will be highlighted. It is also worth noting that even when dealing with manufacturers and industry literature, the word will refer to medium-sized yachts unless specifically differentiated.

What Are Catamarans Made Of?

One of the most interesting subjects in the overall catamaran conversation is the materials used to manufacture these vessels. That’s because different brands use different technology to compose the materials required for the hulls and other areas of a catamaran. 

Hulls of a Bali catamaran are built with sandwich infusion technology using polyester and closed-cell PVC. The brand’s catamarans are fitted with daggerboards, and material variety includes Kevlar in regions of impact and carbon fiber in the lower-weight areas.

Lagoon catamarans have a history of using solid glass below water level , but newer models have a balsa core in the submerged region . While the specifics of composting technology and materials may vary from brand to brand or even model to model within the same brand, the fact that most of these vessels are made of composite material remains consistent.

Parts of a Catamaran

One cannot ask what a catamaran is without getting curious about the various parts of such a vessel. Here is a breakdown of the various parts that go into this vell’s construction:

Unlike monohulls, a catamaran has two of these. They’re usually hollow and fitted out with beds and even a glass window to look out into the water since they’re not submerged. The hulls’ function is to push down on the water, so the water reacts by pushing the vessel up. Therefore, they play an essential role in the catamaran’s buoyancy.

Cross Beams

Because the hulls exert force on the water, there needs to be something that ensures the water’s reaction (upwards force) doesn’t break the deck. Crossbeams serve as connectors between the two hulls and hold them together such that water’s upward force is distributed evenly across the surface between the hulls. 

Depending on the size of the vessel, the number of cross beams may vary. Some of the critical characteristics of cross beams include high density and low surface area. 

A bridgedeck, as the name suggests, is a deck that serves as a bridge between the hulls. Manufacturers make a compromise between space and sailing efficiency when deciding how to design a bridgedeck for their catamarans. A bridgedeck is given significant clearance to allow for smooth sailing but not too much to leave behind, only the deck for living space. 

What you should keep in mind about a bridgedeck is that the smaller its clearance, the more water hits its bottom, causing discomfort for those sailing and dealing damage to the vessel. Also, you can’t minimize the bridgedeck without affecting the hull size, which means you have to compromise between the two.

Bridge deck slamming explained

Other Parts

While the aforementioned parts are key to a catamaran’s construction, they are by no means an exhaustive list of every vessel’s component. 

Catamarans have a topdeck, oftentimes a saloon, and separate chambers depending on the size. The standard vessel will have the interior fitting of a yacht of a similar size. Since none of these parts are specific to catamarans, a detailed breakdown of each isn’t necessary.

Catamaran parts explained

How Long Does a Catamaran Last?

Since catamarans aren’t impulse-buys, you must consider the longevity of the specific model you wish to buy. If you go with a boutique manufacturer without knowing about materials and construction, you may be sold a vessel that may last only seven years. 

On the other hand, brands that list their construction methods with transparency regarding materials used are more confident in their product, which has five times the longevity of a cheaply manufactured catamaran.

Suppose you wish to purchase a catamaran you want to have for 15+ years. In that case, you may avoid buying a “performance” catamaran that focuses on lightweight in favor of sailing speed and effortlessness on the waves. This conversation becomes more complicated when you consider sailing frequency and its impact on different vessels.

Generally speaking, expecting your catamaran to remain functional and smooth sailing for fifteen years is reasonable. That doesn’t mean any catamaran you purchase will fit this criterion but only suggests that you will find vessels with this longevity with relative ease.

Is It Easier to Sail a Catamaran?

It is essential to address different sizes of catamarans when this question arises. Sailing a catamaran sailboat is different from captaining a standard (yacht-sized) catamaran. Since yacht-sized catamarans can come with an autopilot, as can their monohull equivalents, the question becomes more about the sailing experience.

Your guests are more comfortable in a catamaran as the sailing experience doesn’t translate water resistance and wind to the vessel’s interior as much as it does in a monohull. Monohulls get hit by waves that pass between the two hulls of a catamaran.

As for physically sailing a catamaran-design vessel, the experience is different but not objectively easier. For instance, if you’re a seasoned monohull sailor, you’ll find what you’re used to much easier than adjusting two catamarans. 

Final Thoughts

Catamarans are self-balancing and easy to learn, making them a preferred sailing choice among novices and time-strapped sailing enthusiasts. They have recently become symbols of luxury with comfortable interiors and ample living space.

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!

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Save my name and email in this browser for the next time I comment.

Recent Posts

Must-Have Boat Gear for Catamaran Sailors!

Sailing is probably the most gear-intensive activity I've ever done; there are so many decisions to be made about what gear to buy now, for tomorrow, and what to definitely never buy. The gear on...

6 Best Trailerable Trimarans For Bluewater and Coastal Sailing

Having a boat costs a lot of money, even when you are not using it, marina fees, etc. And once it is in the water most sailors never go very far from their "home marina" and sailing will be somewhat...