aluminum catamaran boat builders

Built for a lifetime

Aluminum boats built with every detail engineered, designed, and executed with dedication. ACI Boats builds welded aluminum catamarans and monohulls for recreational and commercial use. Our boats are built to last a lifetime.  

We are founded on generations of boat building experience. ACI Boats is owned and operated by Cory Armstrong, and backed by a team of skilled craftsmen and women. When choosing a boat builder, quality and trust is everything– ACI boats delivers with a safe, and comfortable vessel that you can rely on.

Pybus Point Lodge is proud to announce the official launching of two brand new, catamaran style, fishing and touring boats from ACI Boats. This is the second time we’ve had the pleasure of working with ACI and once again, they exceeded our expectations. Since we run a premium fishing and adventure lodge, we don’t just have to worry about our boats being safe and functional–we also have to make sure that our boats have the style and comfort that our guests expect.

ACI Boats is thrilled to announce the official award of a $3 million dollar contract with American Samoa’s Departmant of Commerce for four “Super Alia” commercial fishing vessels. All four boats will be manufactured at ACI Boats’ facility in Port Townsend, WA. The vessels themselves will be 38’x14’ semi-displacement catamarans, designed by ACI Boats and Coastwise Marine Design. The first of the four vessels, to be completed in Fall/Winter 2022, will be used as a training platform for boat owners, captains, and deckhands. The following three boats, will be completed over the course of 18 months and will then be available for lease by the American Samoa Dept. of Commerce, intended to support the growth and safety of the local fishing fleet.

ACI Boats launches it’s first CatLander in it’s line of CatLander landing crafts. Built for the Jamestown Sklallam tribe in Washington State, the CatLander7500 will be used as a spill response support vessel by the tribe.

• OUR MISSION
• UNIQUE DESIGN
• FUEL EFFICIENT
• CONSTRUCTION
• ALL VESSELS
• PASSENGER VESSELS
• HYBRID VESSELS
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• VESSEL INQUIRY

THE ALL AMERICAN DIFFERENCE

Whether it’s a high speed catamaran passenger ferry, a monohull cruise boat, or a government research vessel, we know each of our operator’s needs are unique.

This is why we do not conform their objectives to fit existing designs. We work on every detail of the mission of each vessel prior to production, to ensure the most operator-friendly, fuel-efficient, and best performing vessel in its class. All American Marine is at the forefront of aluminum vessel design and manufacturing. Our team is committed to guiding you through each step of the process, and we deliver great value on a vessel that is truly unique to its specific application.

Government Contracts:

Duns #: 86-731-6010 cage#: 3fpe7.

Innovation is at our core whether it’s building North America’s first hydrogen fuel cell-powered commercial vessel or fuel-efficient & long-range survey vessels.  Our experience building the most technologically advanced vessels in the business serves our operators first and foremost.

There’s no “one-size-fits-all” solution on the water, and that’s why each of our vessels is truly unique to our operator’s mission. Our holistic design/build approach serves our operators in the short and long term in a vessels overall value.

Recognized for our craftsmanship and high quality, our  history of repeat customers knows that once a vessel is delivered, we stand by that vessel for years to come. You call? We answer. We stand by the quality of our vessel’s long-term performance and quality.

(360) 647-7602

Work and patrol.

Whether it’s for the LA Port Police or the Texas Game Wardens, AAM has built the toughest and most innovative vessels required for their class.

Research and Survey

From university research & survey to offshore wind support vessels, see how AAM is building the most advanced boats for all of our operators’ needs.

Pilot Boats

This unique catamaran design incorporates Teknicraft’s hydrofoil supported hull with industry leading maneuverability.

Hybrid Vessels

It’s happening on our roads and we know we won’t be able to rely on fossil fuels forever, that’s why AAM is on the leading edge of the decarbonization trend.

Passenger Ferries

From high-speed catamarans with hydrofoil technology to hybrid electric monohulls, we’re building the future of transportation.

Dinner Cruise Vessels

AAM is excited about this growing sector, and we look forward to customizing more vessels for this unique application.

STATE-OF-THE-ART Facility

Approximately 85 miles North of Seattle, All American Marine’s production facility is located along the Northern shore side of Bellingham Bay in Bellingham, Washington. In early 2017, AAM moved into the brand new, purpose-built 57,000 square foot boat construction facility located on Squalicum Harbor, allowing for multiple vessels of varying sizes to be in construction simultaneously with staggered production schedules.

TESTIMONIALS

We are very pleased with the team All American Marine has put together to deliver this unique vessel and are eager for our guests to experience San Francisco Bay from the silent decks of the Enhydra [this fall]. We see the propulsion configuration on the Enhydra as phase one in our move toward the full electrification of our fleet. Stay tuned for phase two.

The vessel is definitely a game-changer for the Texas Game Wardens. Our key mission is to make sure the Texas maritime border is safe. The fact of the matter is, there’s not an off the shelf vessel available that meets the daily needs of law enforcement, particularly for long-range vessels. Each step of the way All American listened to us, understood our mission, and in conjunction with Teknicraft, designed and built a vessel that has all the versatility we need to be successful on the water.

“All American builds the highest quality vessels and offers the best value overall value in the country. When we visited their state-of-the-art facility and saw the rapid progress and the quality of work on our first boat, we decided to go ahead and build two vessels.”

A successful partnership is one that accomplished the goals of all parties and concludes with superior results. King country citizens will be the beneficiaries of these quality vessels for years to come. Thank you to AAK, Teknicraft and King County.

“All American Marine worked with us to refine our goals, build a second, proven vessel that met those goals, and then delivered. In fact, despite building two boats during the midst of a global pandemic, they delivered both boats on time and on budget. This new vessel, with its capacity, comfort, and speed is revolutionizing the fleet for Major Marine Tours. Our customers truly enjoy the spacious and accessible deck spaces when viewing whales and glaciers, particularly the stadium bow viewing area.”

“We chose All American Marine based on their experience and skillset in building such highly customized research vessels, vessels that are in service throughout North America. This new best-in-class vessel will provide an unmatched platform for our continued focus on performing to the most stringent offshore survey specifications in the world, whether that is for nautical charting or for subsea exploration to support offshore wind development.”

Working with the All American Marine team from start to finish went beyond expectations, and their commitment to detail and excellent project management throughout the process was the difference maker.

KEEP IN TOUCH

To stay in the know about what AAM is up to, whether it’s current builds and new projects, upcoming launches, or industry news, don’t forget to follow our blog , check us out on Facebook and Instagram (@allamericanmarineinc), or shoot us a note and say hello!

PRESS RELEASE: All American Marine Inks Contract with the University of North Carolina Wilmington for an Innovative 73’ Research Vessel

Bellingham, WA, August 13th, 2024: All American Marine (AAM) is proud to announce the award of a contract to build an advanced 73-foot research vessel for the University of North Carolina Wilmington (UNCW). This state-of-the-art aluminum catamaran, designed by Teknicraft Design in Auckland, New Zealand, is set to enhance UNCW’s capabilities in marine science research and education along the Mid-Atlantic, US East Coast, and offshore waters. The 73’ x 26.7’ twin-engine, propeller-driven vessel will operate as a multipurpose research platform capable of conducting a wide range of scientific missions, including oceanographic surveys, biological studies, and educational outreach programs. Designed to More

PRESS RELEASE: All American Marine Signs Contract with Los Angeles Port Police to Construct a Next-Generation 65’ Patrol Vessel

All American Marine (AAM) is thrilled to announce a signed contract to construct a state-of-the-art 65-foot catamaran for the Los Angeles Port Police. Teknicraft Design in Auckland, New Zealand, designed this cutting-edge dive and patrol vessel, which represents a significant leap forward in maritime law enforcement capabilities for the LA Port Police. The new vessel, measuring 65’ x 24’, is an aluminum catamaran is specifically designed to enhance the operational efficiency and effectiveness of the LA Port Police and will add operational flexibility to their existing fleet. It will employ the latest hull design improvements from Teknicraft Design, providing improvements More

PRESS RELEASE: All American Marine Delivers Hydrofoil-Assisted Tour Vessel to Phillips Glaciers

All American Marine (AAM) is delighted to announce the successful delivery of the Chugach Express to Phillips Cruises and Tours, marking a significant milestone in our partnership. This high-speed and long-range eco-tour vessel will operate daily in Prince William Sound and will be based out of Whittier, Alaska.  Developed by Nic de Waal of Teknicraft Design in Auckland, New Zealand, the Chugach Express boasts an 84.5’ x 30.7’ semi-displacement aluminum catamaran hull, representing cutting-edge maritime engineering. Constructed to US Coast Guard (USCG) Subchapter T classification standards, the vessel features a fuel capacity of 1200 gallons, facilitating fuel-efficient operations. Its design More

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Handcrafted. Custom. Catamarans.

NEW MODEL - The perfect family boat is here. Doesn’t matter if you like pulling up to sandbar parties, cruising around a lake, or nosing up on an island, the Harpoon will provide everyone with a fun time on the water.

NEW MODEL - This shallow draft Bay Boat will get you everywhere you want to go. With an in-class leading amount of deck space, there is more than enough room to carry duck decoys, beach bags, and comfortably enjoy the water with your whole crew.

22SF Catamaran

A popular model throughout the Southeast, these smooth-riding catamarans are equally capable of taking the family for a joy ride or cutting through some chop in the ICW.

25SF Catamaran

Available with single or twin motors, the 25SF can make getting offshore a breeze. A spacious boat that is easy to maneuver and capable of going anywhere on the water.

29SF Catamaran

This catamaran can be customized for any boater. If you prefer a sunset cruise in the river, or you want to spend all day bringing in Wahoo, this cat can be customized for whatever you desire.

32SF Catamaran

Used by fishermen and fire departments in the Southeast, our 32’ catamaran gives you plenty of space for all your charter guests.

35SF Catamaran

Our largest boat gives you the size and range for any type of fishing, anywhere you want to go. Customize this with an upper station and a huge coffin box.

Aluminum Hulls

At twice the strength of fiberglass, our lifetime guaranteed aluminum hulls will provide you with a supremely maneuverable boat that can travel faster and with less draft, all while providing a safe boating experience.

Catamaran Design

Catamaran hulls provide a softer, more stable ride with exceptional efficiency all while providing optimal deck space due to wider beams. The lower center of gravity will give you a ride with the least impact.

2 Decades of Experience

A track record of over two decades of building custom aluminum boats ensures that you will be getting the boat you deserve. Boats built by artisans dedicated to delivering the perfect vessel for you.

Built by Artisans

The Cape Fear Cats team of artisans is invested in seeing your boat all the way through from design to delivery. Our in-house welders, fabricators, riggers, and painters are able to build your boat 100% on site.

We craft all of our 100% aluminum boats to your specific design. Our commercial strength hulls will provide you a top of the line boating and fishing experience.

F I R S T    I N    C A T A M A R A N S

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• RecPro | Recreational
• PaxCat | Passenger
• LabCat | Survey
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RECREATIONAL BOATS

Move Beyond with RecPro

3212-CTC | RecPro

The 3212-CTC is the fisherman’s favorite of the RecPro vessels, an inclination cemented by massive aft deck fish lockers, exterior accessible head, extended T-transom, and walk-around cabin. Add tackle storage and bait stations to guarantee that the tools for catching and cleaning are never far away. Also available with a full-width superstructure, configurations including split cuddy staterooms, full galley, and upgraded interior can turn this vessel from a fish-killing machine into the perfect getaway cruiser. Contact sales to explore the full suite of custom options.

Length: 32’ Beam: 12’ Lightship: 11,000 lb HP: 250hp – 300hp Outboards Cruise: 30 kn MPG: 1.4

3513-CTC | RecPro

Join the legacy with the pride of the RecPro fleet, the 35’ x 13’ classic tunnel catamaran (CTC). Spruce up the base model by adding rod holders, downrigger pads, self-draining fish lockers, or removable dinghy davits. Pick the ideal appliances for the full-sized galley, enjoy an upgraded U-shaped dinette, or wake up refreshed with a hot water shower. Twin staterooms in the cuddy and a convertible berth ensure this vessel has ample sleeping and seating arrangements for any adventure.Contact sales to explore the full suite of custom options.

Length: 35’ Beam: 13’ Lightship: 14,000 lb HP: 350hp – 425hp Outboards Cruise: 25 kn MPG: 1.0

3814-CTC | RecPro

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Move beyond with the 3814-CTC, a hallmark of the RecPro lineup. Whether primarily used for fishing or leisure, the 38’ x 14’ platform easily accommodates both a spacious aft deck and a roomy interior. With twin forward staterooms in the cuddy, a convertible dinette, and an additional berth sunk into the starboard hull, this vessel can comfortably sleep up to 7 people. The expanded galley is equipped to house full-sized appliances, and the ample counter space is perfect for those who like to spread out. Contact sales to explore the full suite of custom options.

Length: 38’ Beam: 14’ Lightship: 17,000 lb HP: 425hp Outboards Cruise: 25 kn MPG: 0.8

Move Beyond Ordinary: BRIX Marine Launches the 3814-CTC ‘Hammer Cat’ with Starboard Walkaround for Unrivaled Offshore Adventures

Port Angeles, WA – BRIX Marine, a pioneer in maritime innovation, is thrilled to introduce [...]

4216-CTC | RecPro

The ultimate fusion of luxury and rugged versatility, the 4216-CTC sits atop the RecPro lineup as its largest vessel and an icon of industrial chic. Propelled by a pair of Volvo IPS 650s, the unhindered cruising and vessel stability can best be enjoyed either alongside the creature comforts of a fully customizable cabin, or out in the elements on the massive aft deck. A hold integrated into the swim step isolates fish storage from the engine room of the twin 510hp inboard diesels, keeping your catch cool and uncooked. Contact sales to explore the full suite of custom options.  

Length: 42’ Beam: 16’ Lightship: 30,000 lb HP: Twin Volvo D11 510hp with IPS 650 Cruise: 25 kn MPG: 1.0

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40′ Razor Cat

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ELEVATE YOUR EXPERIENCE

BEST OF BOTH WORLDS, HYBRID SOLUTIONS, FUEL SAVINGS

This equilibrium maintains speed when needed, ensuring secure passages, optimal operational economy, unwavering reliability, and zero-fuel serenity at anchor. 

The ocean connection bestows tranquility, adventure, and sustenance, fostering personal well-being and a vibrant lifestyle.

CUSTOM CATAMARAN ALUMINIUM YACHTS

Discover the ultimate in custom catamaran aluminium yachts with Cosmopolitan Yachts. Our passion for excellence shines through in every detail, from the cutting-edge hybrid diesel/electric propulsion system to the meticulous construction using top-grade materials and state-of-the-art technologies.

At Cosmopolitan Yachts, we take pride in delivering superior build quality and attention to every detail, ensuring unmatched durability, performance, and luxury. Our custom catamaran aluminium yachts are designed to excel in any environment, with marine-grade aluminium construction that provides strength, sturdiness, and resistance to corrosion for sailing in any water conditions.

Whether you’re looking for a silent electric boat or speeds of over 26 knots, our custom catamaran aluminium yachts offer ultimate flexibility in power and fuel efficiency. And with advanced hull forms and superior bow height, you’ll enjoy comfortable sailing even in seas exceeding 1.75m.

Embark on a journey of a lifetime with a custom catamaran aluminium yacht from Cosmopolitan Yachts. Let us help you bring your dream yacht to life with our superior build quality, attention to detail, and passion for excellence. Contact us today to start creating the perfect yacht for your needs and make unforgettable memories on the water.

HYBRID-ELECTRIC, HYDROGEN AND FUTURE BIOFUEL AND BIOGASES

At Cosmopolitan Yachts, we’re committed to creating custom catamaran yachts with the latest in propulsion technology. Our hybrid diesel/electric propulsion system offers ultimate flexibility in power and fuel efficiency,but we don’t stop there. We’re also exploring the use of hydrogen and biofuels as a more sustainable alternative for yacht propulsion and all our yachts are classified as “Hydrogen-Ready”. Hydrogen yachts or the use of biofuels and biogas could be the future of yachting, offering an even cleaner and more sustainable, self-sufficient energy source for powering your yacht.

Our dedication to sustainability and innovation means that we’re always looking for ways to reduce our impact on the environment while still delivering unparalleled performance and luxury. With the combined integration of the most advanced electric and hybrid technologies and, with the use of the next generation of fuels such as hydrogen, solar, biogas or biofuels,we can offer the perfect propulsion system to meet todays.

DISCOVER OUR YACHTS

New journeys await.

Discover the ultimate in durability and performance with our catamaran yacht range, designed to excel in any environment. with a robust aluminium construction and hydrid diesel/electrical propulsion system to make the most of the best technological advancements without any compromises.

THE WAY FORWARD

Equipped with either a conventional diesel or a hybrid diesel/electric propulsion system installed in both hulls, each with dual power inputs. This grants Cosmopolitan Yachts the ability to operate silently and emission-free as an electric boat at lower speeds, while still achieving speeds of over 26 knots. Complete redundancy and future proof.

A MAJOR IMPROVEMENT

To create the ultimate catamaran yacht, we have meticulously crafted every aspect with a keen eye for detail, to provide unparalleled performance and luxury. Our yachts are constructed using top-grade materials and state-of-the-art technologies, ensuring durability, comfort, and efficiency.

SUPERIORLY BUILT

The use of high-quality marine aluminium in our yachts not only provides strength and sturdiness but also ensures resistance to corrosion, making it perfect for sailing in various water conditions.

EXCEPTIONALLY DESIGNED WHIT A MAJOR IMPROVEMENT

We believe that every yacht should be a masterpiece, crafted with passion and dedication. Our commitment to quality and attention to detail is reflected in every yacht we build.

UNMATCHED COMFORT

The most spacious interiors, complete with luxurious to create an unforgettable sailing experience. The modern exterior design pays meticulous attention to every detail, including the placement of windows and other features that provide maximum comfort and offer breathtaking views of the surrounding water.

The yacht’s advanced hull form and superior bow height work in tandem to ensure comfortable sailing, even in seas exceeding 1.75m.

Sightseer Marine, Inc.

Specializes in custom built aluminum catamaran styled pontoon eco-tour, water taxi, sunset tour, entertainment cruises type boats., stability & capacity.

All inspected vessels come with Stability documentation from the U.S. Coast Guard and approved by our naval architect, showing maximum speed and wave height capabilities.

Built On Our Standard Aluminum Chassis

Catamaran styled Pontoon Eco Tour, Water Taxi, Themed Party Boats, Sunset Tour, Entertainment Cruises, etc type Boats.

U.S. Coast Guard Approved

All vessels are manufactured to the U.S. Coast Guard requirements in 46 CFR, subchapter T. as passenger boats.

SIGHTSEER MARINE PRODUCTS CONSTRUCTION

The chassis.

The chassis is built with 2 x 3 structural aluminum "C" channels built on 12" centers.

"V" Bottomed Hulls

The Hulls are “V” bottomed with vertical side walls allowing for higher passenger ratings per length & width

Deck Warranty

Decks are lifetime warranted (50 years) Marinetech panels that we then Fiberglass & gel coat for a permanently sealed non skid deck surface (Other flooring options available).

Marine Grade Chassis

Made with Marine grade 5052 3/16ths Aluminum Plate & 6062 extrusions & assembled using high grade Stainless Steel fasteners

Railing System

Built with 2” square extruded posts & round & rectangular chrome anodized top rails & feature vacuum laminated solid Foam cored lower kick panels

Hull Protection

Each Hull has a 2.5” angle for a keel & a 2.5” angle along the out side of each hull at the mid point for added hull protection as well as internal structures

Get this product and Meet the Success

We are here to serve you. building the specific boat for your needs & budget..

11016 State Road 52 Hudson, Florida 34669

727 856 6900

[email protected].

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Inspired in Kodiak Tailored Professional Design Built in Alaska

Alaskan aluminum power catamarans, llc.

Specializing in building aluminum, hydrofoil assist, outboard powered catamarans

Alaskan Aluminum Power Catamarans specializes in the design and building of aluminum, hydrofoil assist, outboard powered catamarans; producing a welded aluminum boat specifically designed for operating in our rugged Alaskan environment. Each of our boats is influenced by a lifetime Alaskan resident who has spent most of his life both commercially fishing and sport fish guiding around Kodiak. They are designed by an accomplished naval architect specializing in hydrofoil assist catamarans, and each boat is built here in Alaska by a team well versed in fabricating within Alaska’s Commercial Fishing and Sport Boating industry.

The catamaran-style hull is well known for its stability, extra width, and fuel efficiency. However, the asymmetrical hulls on our boats recognize that the water inside a catamaran’s tunnel is different from the water displaced on the outboard sides of the boat when underway. This design helps to further improve on the catamaran idea; preparing for and mitigating chop entering the tunnel for a smoother ride at speed, as well as minimizing drag, increasing fuel efficiency, and range.

Our hydrofoil further improves that catamaran concept and acts like an airplane wing securely fixed between the hulls, providing several inches of lift to the entire boat on plane. Lifting the boat reduces the wetted surface, thereby reducing drag, increasing fuel efficiency, speed, and range. Lifting the boat also increases the distance between the water’s surface and tunnel, further softening and improving the ride in chop. Our hydrofoils are designed and placed to maximize lift at practical cruising speeds and anticipate a variety of load conditions.

Cabin and deck layout are easily customizable and easily tailored to suit your specific tastes and goals for your vessel. We are very happy to work with you and include our own personal experiences and suggestions as we help to create your ideal platform; whether you are a charter captain looking for a layout specific to your clients needs, a remote cabin owner interested in hauling material and supplies, or any normal Alaskan looking to take family and friends out for a day or week of fun. These decisions aren’t new to us and we enjoy helping tailor this technology to your application.

PO Box 888 Kodiak, AK 99615 Phone: (907) 891-8534 MyBoat@AlaskanCatamarans.com Facebook Instagram

Call: 337-828-2580 [email protected]

Seacor Cougar

Hull Platform: Catamaran Hull Number: 468 Vessel Size:  170' x 38'

Key West Express

Hull Platform: Catamaran Hull Number: 460 Vessel Size:  170' x 38'

Big Cat Express

Hull Platform: Catamaran Hull Number: 452 Vessel Size:  152' x 34'

Galaxy Wave

Hull Platform: Catamaran Hull Number: 461 Vessel Size:  152' x 34'

Schoodic Explorer

Hull Platform: Catamaran Hull Number: 493 Vessel Size:  98' x 28'

Acadia Explorer

Hull Platform: Catamaran Hull Number:  492 Vessel Size:  95' x 36'

Seacor Cheetah

Hull Platform: Catamaran Hull Number:  465

Seacor Leopard

Hull Platform: Catamaran Hull Number: 476

Coastal Explorer

Hull Platform: Catamaran Hull Number: 495

Hull Platform: Catamaran Hull Number: 496

Recent Delivery

WEST COAST TOUGH

Aluminum catamarans.

JR Marine builds top-of-the-line welded aluminum catamarans. We build vessels for every imaginable purpose including sport fishing, commercial fishing, commercial transport and research vessels.

BOAT MODELS

36′ catamaran, 30′ catamaran, 26′ catamaran, 20′ monohull, 16′ monohull, jr marine – the metal manipulators.

AT JR MARINE, we love a challenge. Primarily fabricators of aluminium catamarans, monohull and structural boat accessories, we are also experienced in the production of a wide range of custom aluminium products.

JR Marine is considered one of the best aluminum catamaran boat builders due to our focus on innovation, design, and performance. We use advanced materials and manufacturing techniques to create catamarans that are lightweight, strong, and efficient. Our company places a strong emphasis on customer satisfaction, ensuring that each boat is designed to meet the specific needs of the customer. With a commitment to excellence, JR Marine’s boats are known for their superior ride, handling, and reliability.

TRIED, TESTED & TRUSTED

Excellence on the water.

Our vessels are trusted by fisherman, charters and recreational boaters. Boats by JR Marine will give any operator confidence on the water.

West Coast Tough

We build aluminum catamarans that can handle the rugged conditions of any marine situation.

DESIGNED & BUILT TO LAST

Our designs are engineered to carry more payload with greater fuel efficiency, while maintaining maximum stability.

We love a challenge

We specialize in customized aluminium catamarans, monohull and structural boat accessories.

SUPERIOR HULL DESIGN

Why catamarans.

Catamaran hull designs are superior because they provide stability, speed, and comfort. They have a wider beam, reducing roll and providing a more stable platform. The two hulls also increase surface area, reducing drag and resulting in higher speeds. Finally, the separation of the hulls provides more interior space, leading to greater comfort for passengers.

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Professional BoatBuilder Magazine

An aluminum expedition catamaran.

By Dieter Loibner , Apr 5, 2022

With 110′ LOA, a 35′ beam, and 45′ (33.5m, 10.6m, and 13.7m) of bridge clearance, the H-2 catamaran seeks to make a case for U.S. custom boatbuilding.

Hauling toys beyond the horizon is the raison d’être for a rugged go-anywhere catamaran designed and built in the U.S., a notable exception in the world of big yacht projects.

Gunboat might have left town, but there’s another big catamaran under construction in its old facility in Wanchese, North Carolina. It’s called H-2 , short for Hippocampus 2 , a stout 110-footer (33.5m) that liberally and intentionally quotes from the expedition/workboat vernacular. It’s built from aluminum and was conceived to go to the back of the beyond, where adventure beckons and Vessel Assist doesn’t operate. Aside from commodious and cushy accommodations, the boat offers grid autonomy, ocean-crossing range, and cargo capacity to match the mission of hauling a 26 ‘ (7.92m) tender, a 17 ‘ (5.8m) skiff, a two-person submarine, a four-seat ATV on the main deck, and a small helicopter on the flight deck aft.

The boat was commissioned by Brian Schmitt, 67, a real  estate executive in the Florida Keys, who pilots his own plane to commute to the Bahamas, where he keeps Hippocampus , his current 57 ‘ (17.37m) cold-molded wood/epoxy catamaran. I asked him about the jump from 57 ‘ to 110 ‘ . “I never thought I’d have the ability to do that in my own boat until probably the last few years,” he replied, adding that “it would be 120 ‘ [36.58m] if I had to do it today.”

Its predecessor, Hippocampus, built in wood/epoxy, was launched in 2003. At 57′ (17.37m), it is about half as long as H-2, but with 22,500 miles under its keels, it was a useful starting point for designing the new vessel.

Wearing shorts and a shirt with the new boat’s name and logo to our meeting, Schmitt talked openly about his project, which he manages as attentively as his real estate brokerage with 130 agents. Communication is his thing, responding to e-mail questions in near real time (in ALL CAPS) and talking to contractors directly. No project manager.

A passionate diver who habitually explores remote and exotic locales, Schmitt said he was happy with the first Hippocampus , which has three staterooms and cruises at 15 knots on twin 370-hp Yanmars. “It was the vehicle that got our 17 ‘ tender wherever we needed it.” But running the little boat 60 or 70 miles a day lost its charm. “One of the things I wanted was a twin-engine tender that would have more room for dive gear. That ended up being a 26 ‘ Calcutta, so I needed a bigger mother ship.”

With accelerating climate change, the carbon footprint of ships and large yachts is under scrutiny, but hydrocarbons still win when speed, range, and payloads are priorities. While H-2 doesn’t break the mold there, Schmitt pointed to the project’s virtues as a U.S. domestic build. “You can’t complain about global warming when you’re flying around in your G500 jet that’s contributing more CO2 emissions than anybody else in the world,” he said. “You can’t complain about all the boats being built in Germany, The Netherlands, and Italy, and then go buy a boat [there].” Schmidt wanted to build locally, keeping jobs and money in the U.S. Besides, he noted, this approach simplified communications and enabled him to personally check on progress during COVID. Perhaps most importantly, he could pick a team of trusted and compatible mates to turn his dream into a boat.

The vast build hall left vacant when Gunboat left Wanchese, North Carolina.

He selected John Marples, a fellow pilot, inventor, and multihull specialist for the design and Felix Herrin to build H-2 . Both men had worked for him on Hippocampus , and their familiarity helped when meeting today’s challenges, such as damaging trade tariffs that drove up aluminum prices, and a pandemic that killed millions, wreaked havoc on global supply chains, and caused labor shortages in industrial sectors. These factors have conspired to delay H-2 ’s launching by roughly two years and counting.

Advantage Aluminum

A key decision early on was to build in aluminum, which promised a robust structure but required extra steps to deal with corrosion and noise mitigation. “Construction was reduced to something simple—a V-bottom deadrise model, stretched out,” Marples explained. “There wasn’t any benefit to round bilges on an aluminum boat. You’d have to add internal structure to support the flat panels, and it drives the cost and difficulty of construction way up. We’re talking about a speed-to-length ratio of 2 or less, which is not a big deal. His current boat would do a speed/length of about 3, so the extra length means that you’re never really pushing the boat that hard, so shape was not a huge consideration.”

Marples and Herrin go back at least three decades to their mutual acquaintance with naval architect and boatbuilder Dave Dana, who assisted Marples with the hull design for Admiral Pete , a catamaran passenger ferry still serving Puget Sound. Herrin works with different construction materials, but having built crew boats for Petróleos de Venezuela (PDVSA) at Sea Force in Palmetto, Florida, he has spent considerable time with aluminum.

Taking a break during IBEX 2021 are builder Felix Herrin (left) and owner Brian Schmitt. H-2 is their second joint project with designer John Marples.

The structural components on H-2 are 5083-H32 alloy aluminum plate and extrusions of 6061-T6 alloy. Scantlings, materials, and weldment comply with the American Bureau of Shipping’s (ABS) 2016 design guidelines for pleasure motoryachts. Hulls and wing structures have transverse frames and bulkheads spaced on 36 “ (0.91m) centers. Those frames are supported by substantial centerline vertical keels (CVKs) welded atop twin 3 “ x 8 “ (76mm x 203mm) solid extruded-aluminum-bar keels. Intermediate subframes in the forward and aftermost hull compartments strengthen the hulls for operating in ice. Schmitt indicated he wants to traverse the Northwest Passage. For the same reason, there’s 3⁄8 “ (10mm) plate running the length of the boat above and below the waterline.

The topside and underwing plating is primarily ¼ “ (6mm), with areas of 5⁄16 “ (8mm) to strengthen slamming zones in the bow. The main deck plating is also 1/4 “ while the foredeck plate is specified at 5⁄16 “ . The bottom plating is 5⁄16 “ in the aft two-thirds of the hull and 3⁄8 “ forward. “We built all the frames and bulkheads first, then scarfed together the keel sections [and] lined those up on the bunks that we built on,” Herrin explained. “We welded the CVK on top of the keel, then started installing frames.”

Hulls and wing structure have transverse frames and bulkheads on 36″ (0.91m) centers. The hulls are supported by centerline vertical keels.

Herrin said he changed aluminum suppliers midway through the project, sourcing from Bayou Metal Supply , an ISO 9001:2015–certified distributor in Slidell, Louisiana. “We sourced the material from Greece and from domestic suppliers,” said Taylor Smith, who handles Bayou’s sales. Tariffs, he said, did not slow down business much, but the aluminum cost more. “Felix sent cut files. We had the material in inventory, we cut it, processed it on a router, and shipped it on time. Everything flowed well.”

Naval and structural engineering and detailing was contracted out to Van Gorkom Yacht Design in Portsmouth, Rhode Island. “My first responsibility was looking at structures,” Geoff Van Gorkom said. “Given that this is an aluminum yacht, we can do literally all the structures in 3D and have all the metalwork precut before it came into the yard. All the frames and longitudinals and all the primary structure were precut, which saved huge amounts of time.” Van Gorkom said he uses Rhino 3D and some of the numerous modules such as Orca 3D for hydrostatics and hydrodynamics, and 2D AutoCAD to produce construction details.

Helping save time and money, 3D-modeling allowed frames, longitudinals, and the primary structure to be cut before being sent to the building site.

Van Gorkom observed that H-2 is not a fussy high-performance vessel that needs minimum weight to achieve maximum speed. Besides ABS guidelines that address torsional loads in catamaran structures, he also consulted A.L. Dinsenbacher’s paper “A Method for Estimating Loads on Catamaran Cross-Structure” ( Marine Technology , Vol. 7, No. 4, October 1970) to estimate load conditions in beam and quartering seas. “This is going to be a very stiff boat. It’s going to be a very strong boat simply because it has to be, and that was one of the criteria that Brian put out there right from the very start of the project. The boat is sturdy and stout, a strong expedition yacht.”

Van Gorkom also engineered the setup for a folding deck crane housed under a flush hatch in the helideck on the port side to launch and retrieve the two-man submarine or the ATV. “It’s basically an enclosure that opens up, so the crane extends out,” he explained. “It comes up on a telescoping pipe to swing out and pick up something from the side of the boat.” It required support from beams on each side of the crane and cutting a slot in the helideck for the lifting bridle so the loads can move inboard or outboard. On the starboard side, the 5,500-lb (2,492-kg) Calcutta tender is an even heavier load moved by twin overhead beam cranes. The 17 ‘ Twin Vee is launched and retrieved from the foredeck with a 2,500-lb-capacity (1,153-kg) crane.

Catamarans are known to be weight-sensitive, so how will H-2 handle the weight of all the toys and high superstructure? The arch over the flybridge is 33 ‘ (10.05m) above waterline, Van Gorkom confirmed. “Add another 10 ‘ [3.05m] for the radar, mast, etc., so a comfortable bridge clearance would be around 45 ‘ [13.7m].” Marples conferred with Van Gorkom about the effect of the added weight on the center of gravity, which was deemed “almost imperceptible,” Marples remembered. A quick calculation suggests that a 5,500-lb deck load is equal to only 1.57% of a full-load displacement given as 350,000 lbs (158,550 kg).

High Power, Low Noise

Van Gorkom hired engineers at HydroComp to evaluate the design’s hydrodynamics and propulsion systems, including the influence of hull-shape parameters and demi-hull spacing on resistance. HydroComp also offered a speed-power prediction to aid with engine selection and recommended optimum shaft rpm and propeller parameters. Technical director Donald MacPherson, who prepared the report, outlined the process and findings: “Particularly interesting for this project was the use of its novel analytical distributed volume method [ADVM] for the vessel’s resistance modeling. This 2D technique (between parametric methods and CFD) uniquely allows for assessment of the influence of local sectional area curve regions (such as ‘shoulders’ or inflections) in wave-making drag. It also directly evaluates the effects of catamaran hull spacing.” HydroComp helped optimize the hulls by identifying the regions that contribute most to wave-making drag, and securing a 3% reduction in total drag at the design speed by making what MacPherson called “very minor changes to the immersed volume distribution.”

Rob Ayers works on the installation of the starboard engine’s Evolution Marine Shaft System that will be fitted with a 36″ (0.91m) five-blade propeller.

That simulation was mapped to benchmark performances of four similar catamarans, and the process was run for two design variants, followed by a propulsion simulation for partial-load conditions. The hull-spacing study concluded that the originally designed 35 ‘ (10.7m) beam remained suitable despite the boat being 20 ‘ (6.1m) longer than originally drawn. The chosen propulsion system comprises two MTU 10V 2000 M96, 1505-mhp diesels with ZF 3000 flange-mounted marine gears, providing an estimated top-speed range of 20–22 knots, cruising speeds of 12–15 knots, and 10–13 knots for long-range voyaging. Actual performance will be established during sea trials.

The recommended propeller specifications developed by HydroComp were for five-blade models with 36 “ dia­meters. HydroComp applied Prop­Elements, a wake-adapted propeller-analysis tool, to determine the advisability of installing a nozzle or shroud to restrict transmission of pressure pulses to the hull and to create a more uniform inflow. This would reduce interior noise but would increase appendage drag and power demand. Schmitt said he will wait to see if cavitation or prop noise is an issue before making a final decision.

He invested heavily in noise and vibration mitigation, knowing that an aluminum boat won’t provide the natural sound-dampening of a wood/epoxy structure like that of his first Hippocampus . Consulting with Soundown of Salem, Massachusetts, Schmitt wanted to replicate what worked well on his old boat, starting with the Evolution Marine Shaft System, in which the prop shaft runs in an oil-filled tube and uses roller and needle bearings instead of standard water-lubricated bearings. “You have a lot less shaft noise, but one of the primary benefits of an integral thrust bearing is that it transmits all the thrust directly into the hull, as opposed to pushing on the gearbox or the engine and gearbox combination,” said Sam Smullin, Soundown’s marketing and quality assurance manager. “It allows for a much softer engine mounting, so you reduce the noise from the shaft itself and get a much quieter engine installation, which reduces structure-borne noise.” Because of the relative weight sensitivity of catamarans, Smullin said, “it’s particularly important to do a really good job on the driveline.” His father, Joseph Smullin, president of Soundown and J&A Enterprises Inc., an engineering firm for noise and vibration control, estimated that this could reduce driveline noise levels by 5 dBA to 10 dBA compared to a conventional system.

Clemente Perez, one of Herrin’s build crew, works on the interior. The extensive sound and thermal insulation includes foam sprayed into the cavities.

Soundown also looked at the two 38-kW Northern Lights gensets, which have double-isolation mounts to reduce structure-borne noise. The firm also recommended structural changes to ensure that the mount foundations were as stiff as possible.

Energy from propulsion or generator engines invariably transmits to the boat structure and then resonates through big, flat panels like bulkheads, decks, ceilings, and liners, causing the familiar vibrating rattle. To dampen those vibrations, Herrin said he used Roxul, a lightweight, semi-rigid stone-wool insulation for fire resistance and sound control. His crew also sprayed cavities with Dow Froth-Pak, a quick-cure polyurethane foam for thermal insulation, and installed Sylomer (a microcellular PUR-elastomer) between the structural components and the floors, walls, and panels. “We glued the Sylomer, which is kind of a spongy foam, to the structure of the boat, and then the plywood of the subfloors and walls are glued to that,” Herrin explained, adding that this created a floating interior without any fasteners.

The plywood, called QuietCore, is a composite sandwich panel comprising marine plywood skins and an acoustic damping layer that converts acoustic energy into small amounts of heat that are dissipated. Soundown claims that an 18mm (0.7 “ ) QuietCore bulkhead can reduce noise transmission by up to 10 dBA, an audible reduction 50% greater than with regular marine plywood of equal thickness.

Electricity for a Small Town

Going off grid on H-2 does not mean anyone will suffer, as long as the electrical system keeps powering the boat’s myriad house loads—hydraulic Maxwell windlasses and thrusters; a Webasto air-conditioning system; two full-size stand-up freezers, two refrigerator freezers, and two under-counter refrigerators in the galley, all by Vitfrigo; Krüshr compactors for recyclables and garbage; Headhunter sewage-treatment system; Alfa Laval fuel-polishing system; two FCI watermakers; a complete set of Garmin navigation electronics with full redundancy; and a Böning vessel control and monitoring system.

Two Northern Lights 38-kW gensets are the heart of H-2’s AC system, which also includes a 37-kW Atlas inverter to connect to shore power in foreign ports.

Much of the AC side was designed and specified by Ward’s Marine Electric in Fort Lauderdale, Florida, in cooperation with OceanPlanet Energy of Woolwich, Maine, and principal Bruce Schwab, who helped design and integrate the DC components. “Today there’s a big trend in the industry to use shore-power converters as inverters and superlarge lithium-ion battery banks to provide power, at least temporary power, for major loads like air-conditioning, chiller plants, and things like that,” said Ward Eshleman, chairman of Ward’s Marine Electric. “So, rather than using only smaller inverters and synchronizing them and stacking to get additional kW, the trend for the larger vessels is to use shore-power converters as inverters. There is an inverter bus in the main switchboard.”

True to its go-anywhere mission, H-2 was fitted with an Atlas 37-kW inverter to connect to shore power in places that do not serve 60 Hz, 240V single-phase power. “We can take anything from 90V to 400V and pretty much anything from below 50 Hz to the 60 Hz and single- or three-phase,” Herrin explained.

Eight GTX24V315A-F24 lithium-ion batteries from Lithionics are split between a house bank that can run all DC loads for at least 24 hours, and an emergency bank to operate critical DC loads—display screens, radios, nav lights—for 24 hours. The boat is equipped with 10 Solara Ultra-S 160W panels paralleled in two groups of five each, connected to two Victron SmartSolar MPPT 100/50 solar controllers to charge the house bank. Given enough sunshine, solar and battery power should be “capable of running lights and refrigeration but not air-conditioning or heating,” Schmitt said. “Since we will likely spend most of our time in the tropics, we did not believe that solar power alone could do the job we needed.”

OceanPlanet Energy specified four Victron Buck-Boost DC-DC converters, two for each engine, to help charge the house bank from the starter batteries without having to modify the engines’ stock alternators, which would have voided the warranty. “The converters activate based on the input voltage from the starting batteries,” Schwab explained. “With lower rpm, the alternators would not produce enough current to feed both converters without the starting-battery voltage dropping, turning the converters off. Then the voltage will rise, the converters turn on again, drop the voltage, turn off…over and over. Staggering the input voltage cut-in, hopefully starting the converters one at a time, will more smoothly supply power to the house bank across the engine/alternator rpm range.”

OceanPlanet Energy specified the DC system including DC/DC converters and hefty battery banks to power house loads and critical electronics.

There are two 4,500-watt 240V split-phase engineroom-ventilation fans connected to two Victron Quattro 5-kW 24V inverter-chargers configured for 240V/120V split-phase AC loads. They can accept AC inputs from two sources (shore power or generators) and automatically connect to the available source. “In the event of a grid failure or power disconnect, they take over the supply to the connected AC loads by inverting from the Lithionics house-battery bank,” Schwab said.

“It’s more complicated than that,” according to Herrin. “Typically, we’re going to be operating with the A-bus and the B-bus tied together, so we can power everything with one generator. The B-bus actually passes current through the Victron inverter-chargers on its way to the load. We have the ability to split the A-bus and the B-bus and run the A-bus on one generator and the B-bus on the other in the few instances we’re exceeding the capacity of one of the generators. If we lose both generators, then the essential loads are still going to be carried,” meaning engine vents or water pumps.

Redundancy and emergency backups also figured largely in the deliberations of John McKay, manager of the Switchgear Systems Division at Ward’s Marine Electric and point man for this project.

One of his challenges was limiting the voltage drop in the estimated 53 ‘ (16.2m) cable run between engines, which in an emergency allows the starboard engine to be started from the port battery and vice versa. “For a starter group, you can allow a 20% voltage drop,” McKay said and noted that starting the engines requires 720 amps, while the gensets needed only 200 amps. “I was keeping the 720-amp current between 7% and 11% voltage drop, getting up to some pretty good-sized copper. Some sections of the run were 240mm2 [500MCM] cable.” Knowing that the boat is capable of going to high latitudes, McKay recalled his youth and the frigid winter mornings in Massachusetts, “where you can crank a diesel all day long at a low rpm, and it’ll never start. You just need to turn it over one or two times at a higher rpm, and it’ll be running. So, I was making certain that the starter was going to crank at the highest rpm possible and not lose it all to voltage drop.”

Protecting Assets and Finishing the Job

No matter how fast or how far H-2 will travel, corrosion caused by galvanic current between dissimilar metals, by stray currents or by electric fault, is an enemy that needs to be kept in check. That’s the calling of Ted Schwartz, who runs Electro-Guard (Mount Shasta, California). He’s one of the country’s foremost experts on cathodic protection, and also served on ABYC’s E2 Cathodic Protection Project Technical Committee.

“We designed the system and supplied all the equipment and steered them through the installation,” Schwartz said. It’s a 15-amp impressed-current-cathodic-protection (ICCP) system, model 715 A-2, with three anodes and two reference cells. Regarding the boat’s Evolution shaft system with driveshafts running inside an oil-filled tube, Schwartz said: “It was a real challenge because you can’t actually make contact with the propeller shaft on the inside of the boat.” He consulted with Soundown and found a solution. “At the coupling on the inboard end of the tube, a bit of the shaft stuck out through the seal,” Swartz said. “There’s this coupling that Soundown built that fastens to the shaft, and we asked them to provide a surface on that coupling where we could put our silver slip rings on [to provide an electrical connection] to protect props and shafts.”

Every anode can deliver up to 5 amps of current using its own current controller that receives a signal from the main controller, which determines exactly how much current each anode will put out. The entire system consists of three anodes, three current controllers, the main controller, and a separate monitoring station connected to the controller by signal cable. Later, Schmitt also ordered a backup system employing aluminum sacrificial anodes.

On catamarans, the company installs a reference cell aft near the prop of each hull, and an anode on the aft section of each hull, and one anode amidships on the inboard side on one hull.

Chromate, two layers of epoxy, copious amounts of fairing compound, and various primers rendered the surface fair and ready for a yacht-quality paint job.

At the time of this writing, the vessel had been shot with chromate and two layers of epoxy before approximately 500 gal (1,893 l) of fairing compound and 325 gal (1,230 l) of various primers rendered the surface fair and ready for a yacht-quality Alexseal paint job with 35 gal (132.5 l) light ivory, 24 gal (91 gal) stark white, and 2 gal (7.6 l) cordovan gold. Parallel to the exterior, construction was on the home stretch with installation of the crew quarters and the saloon overhead. On the systems side, pressure checks were performed for hydraulics and plumbing.

Since H-2 is a much larger and more complex vessel than the original Hippocampus , with a multitude of systems that need to be managed, monitored, and maintained, I was curious how many crew Schmitt was planning to hire to help run his new boat. He said he consulted with captains and headhunters, and “the consensus is three or possibly four at most. I just completed my 100-Ton Masters and will build time on the new boat as well. We won’t charter and are not accustomed to being cooked for or served or having our beds made and all that. So mostly I’m looking for a qualified captain and engineer to maintain the systems.”

Little surprise that a hands-on operator like Schmitt does not want to cede too much of the game he loves to play. But as big, bold, and broad-shouldered as H-2 will be when she finally emerges from the old Gunboat shed in Wanchese, the proud owner is quick to remind anyone that it’s still “a vehicle to get the toys wherever.”

H-2 : The Designer’s View

H-2 ’s owner, the adventurous Brian Schmitt, has dived into deep caves to see submerged caverns, hand-fed large sharks that would normally view him as food, and spent years in his off-time exploring Caribbean archipelagos in Hippocampus, his current 19-year-old 57 ‘ (17.4m) power catamaran. Nearing retirement age, he gave the order for his “ultimate” yacht.

The foldable hydraulic deck crane to launch and retrieve a two-man electric submarine or an all-terrain vehicle required cutting a slot in the helicopter deck for the lifting bridle.

The first talk about the new design was between the owner, the builder, and me. As we discussed the mission of the boat, it became clear that it would fall into the category of expedition vessel with more guest staterooms, more range, and more room for equipment than his old boat. Brian defined the function of the vessel as a carrier for a 26 ‘ (7.92m) twin-outboard catamaran, an outboard skiff, a small car, and a small helicopter, which needed a flight deck. This vessel was to be used with family and guests while also serving as an operations base for outbound travel by air, land, or sea.

Aside from commodious accommodations, a key requirement was comfortable motion on rough seas. This was to be a catamaran, like his current boat, which offers extensive real estate afloat in a seagoing vessel. The only restriction for the new design was a beam no greater than 35 ‘ (10.6m) to fit the largest Travelift.

The trade-off for overall beam width involves room versus roll motion. A wider catamaran responds more quickly to roll in seaways but with less amplitude, whereas a narrower beam rolls more slowly with slightly more amplitude. The slower roll is preferable as long as overall roll stability is maintained. Roll in catamarans is unlike roll in single-hulled vessels. Because the vessel is supported by two buoyancy chambers (hulls) with distance between them, motion has little to do with roll inertia, but rather with response of the hulls to the seaway. Each hull responds to a passing wave independently by heaving (up/down) and rolling, which is a circular motion around the center of gravity (CG) that translates to lateral motion when standing above the CG, especially high up on the bridge. Power catamarans, unlike sailing catamarans, do not require wide hull spacing to generate righting moment (to support a sail plan), so they can have closer hull spacing, which still preserves sufficient stability, slows wave-response roll characteristics, and takes up less space in port.

One of the expected routes for this vessel is the Northwest Passage over the top of North America. Boats venturing there can expect floating ice, so we added thicker hull plating at the waterline and an ice-separation chamber on the cooling water intakes. We also designed the hull to give the propeller protection by positioning it behind a deep canoe-stern afterbody with no exposed shaft. A rudder horn, below the propeller extending aft from the hull, adds support for the rudder and protection for the prop. This configuration is useful as a hedge against the possibility of grounding. In fact, this boat can be careened on the beach between tides if necessary for repairs. The hull includes a strong, deep, vertical keel structure that allows for blocking anywhere along its length.

Speed and range became the largest determinates of the design. A maximum range of 4,000 miles at 15 knots (enough to cross the Atlantic Ocean) was proposed. Catamarans are easily driven at modest speeds due to lack of significant wave resistance by narrow hulls. A preliminary speed prediction analysis showed that we would be in the ballpark with about 1,400 hp (1,050 kW) and 5,000 gal (18,925 l) of diesel per hull. The final installed fuel capacity is 12,500 gal (47,313 l).

The general arrangement plan shows crew quarters in the hulls, three guest cabins, office, saloon, and galley on the main deck and owner’s suite on the bridge deck level.

A totally new design normally goes through a lengthy proposal and critique cycle between designer and client, especially if the client is knowledgeable and involved. The vessel’s first iteration started at 90 ‘ (27.43m) LOA, but it became evident that it needed more length to relieve a number of ills. After adding 10 ‘ (3.05m) we saw improvements, but it wasn’t until the 110 ‘ (33.5m) length proposal that we felt all the requirements had been satisfied: more slender hull shape, more open interior space, and better placement of machinery and tankage. The flight deck for the helicopter became larger, and the forward superstructure fairings gave the boat a sleeker look. And at 110 ‘ we achieved an efficient length versus waterline beam ratio that reduced wave drag and fuel consumption at the target cruise speed.

While beam remained at 35 ‘ , lightship displacement increased significantly to 230,000 lbs (104,190 kg). Accommodations now include crew quarters for four persons in the bows; three double guest cabins and a ship’s office forward; a large saloon amidships with adjacent galley, and a dive and a storage locker aft on the main deck. The upper deck is arranged with a full-width-bridge steering station forward, protected by a Portuguese bridge, and a master stateroom with en suite bathroom aft. The flight deck extends aft of the master stateroom. Access to the upper deck is by either a staircase from the foredeck, an interior staircase adjacent to the ship’s office, or by stairs from the starboard side deck.

The largest variable weight on the boat is fuel, so the tankage is located amidships to minimize its influence on trim. Engine and machinery rooms aft of the tankage take up the remaining spaces all the way to the transoms. Other amenities include a utility area aft of the crew quarters port side with storage and washing machines, and a walkway through the tank spaces and enginerooms to the boarding decks at each transom. Another late addition is the flying bridge to aid with shallow-water operation by improving the vantage point to see coral heads and other obstructions. Its protective bimini serves as a mounting platform for lights and antennae.

—John R. Marples

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Bestevaer s/y, bestevaer m/y, custom bestevaer 1/1, the world's finest explorer yachts., become part of the km family.

Our team is always ready to assist our yacht owners with advice and assistance in the event of contingencies.

Explore Bestevaer yachts

Designed by one of the world’s most legendary sailors as his private yacht. Brought to you by KM Yachtbuilders.

ArrowCat Power Catamarans Unmatched Craftsmanship Meets Unyielding Spirit

Experience the thrill of the open water with unparalleled comfort and tailored craftsmanship. Whether you are cruising the coastlines or anchored in serene bays, your ArrowCat power catamaran is your gateway to a life of adventure and tranquility.

Introducing Our Newest Addition, The 20' Power Cat Center Console Model

We intentionally designed this model to be simple and plain – simple to take the boat out, simple to use and to maintain, plain by allowing you the flexibility to customize it according to your preferences.

ArrowCat 20cc

This 20-foot center console is built with strength and purpose, designed for ease and simplicity. Effortlessly take it out on the water, and enjoy straightforward maintenance and operation. Its clean, adaptable design allows for extensive customization, whether on your own or through a dealer.

Fully Planing Hull Design LOA: 19′ 4″ / 5.89 meters Beam: 8′ 4″ / 2.54 meters Draft: 10″ / 0.254 meters

Explore Our 32' and 42' Signature Cabin Models

Perfect for inshore and offshore cruising, long distance and overnight trips, cold off seasons and hot boating seasons, and much more. The ArrowCat 32-foot and 42-foot models provide an exciting and versatile experience on the water. Explore to see which one could best suit your boating lifestyle.

ArrowCat 320

Merging express cruiser elegance with catamaran stability, the ArrowCat 320 Coupe features a planing hull design for smooth, swift rides. Powered by twin outboard motors, it promises dynamic performance and exhilarating adventures on every voyage.

Standard Layout: 2 Cabins/ 1 Wet Head Optional Tower Option LOA: 31′ 2″ / 9.5 meters Beam: 10’ / 3.05 meters Draft: 20″ / 0.508 meters

ArrowCat 420 Coupe

The ArrowCat 420 Coupe combines the luxury of an express cruiser yacht with the stability of a catamaran hull. Designed with a planing hull for agile, efficient navigation and powered by twin outboard motors, it delivers unmatched performance for your ocean adventures.

Standard Layout: 2 Cabins/ 1 Full Head LOA: 41′ 9″ / 12.73 meters Beam: 14′ 9″ / 4.50 meters Draft: 18″ / 0.46 meters

ArrowCat 420 Flybridge

 This luxury express cruiser yacht boasts a catamaran hull for superior stability and a planing hull design that ensures efficient, agile handling. Powered by twin outboard motors, it offers robust performance. The addition of a flybridge enhances your view and enjoyment, making every journey unforgettable.

Standard Layout: 2 Cabins/ 1 Full Head LOA: 41′ 9″ / 12.73 meters Beam: 14′ 9″ / 4.50 meters Draft: 20″ / 0.51 meters

Our Unique Design

Enjoy your boat year-round and stay warm and dry during cooler weather or overnight trips, while also having a comfortable and private space to retreat for whenever you need a break. Here are a few reasons why an ArrowCat power cat is an excellent boat to consider.

Catamarans have two hulls, which provide more stability in the water. They are less likely to roll or pitch, which means they offer a more comfortable ride, especially in rough conditions and for people who are prone to seasickness.

Power catamarans are typically more fuel-efficient than monohull boats of the same size. It requires less energy and yields more performance per HP. The two hulls create little to no drag or resistance to get on plane, resulting in greater fuel economy. Allowing for longer journeys with fewer refueling stops. 

Power catamarans have a shallow draft which means they can navigate diverse cruising grounds – beaches, islands, rivers, channels, and coastal areas with limited water depth. 

Express Cruiser

Cabin boats are designed with comfortable sleeping quarters and living spaces. They feature a sleeping space with a bed, a galley with a stove, sink, and refrigerator, and a head with a shower and toilet.

Cabin boats provide protection from the elements, such as wind, sun, and rain. This allows for comfortable cruising in a variety of weather conditions, as well as providing a haven during storms

Express cruisers are designed for efficient and fast navigation, offering higher speeds compared to traditional cruising boats. They usually have powerful engines that enable them to cover long distances quickly, making them ideal for day trips or weekend getaways.

Powered By Outboard Motors

Outboard motors can provide excellent performance and speed. They can often reach higher speeds than inboard motors of the same horsepower.

Outboard motors have a simple and standard design and are relatively easy to install, they do not require additional components such as a transmission, propeller shaft, couplings, and struts, that inboard engines do. They are easily assessable and cost less to maintain than inboard motors because they are mounted outside at the rear of the boat.

Outboard motors are often designed with features that make them easy to maneuver. For example, they can be tilted or rotated to provide precise control and handling in tight spaces and shallower waters.

About ArrowCat

Crafting Versatility and Adventure on the Water Since 2008

At ArrowCat, we believe in creating boats that are ready for anything. Our American-owned company builds versatile, multi-functional catamarans designed not just for a specific activity, but for a lifestyle that demands freedom and reliability. Whether you’re cruising, fishing, or exploring, our boats deliver superior performance in all conditions.

Trusted by seasoned mariners across coastal and saltwater environments, ArrowCat power catamarans embody the spirit of adventure and the promise of quality.

Learn More About Us

Experience A Smooth, Fast, And Stable Ride

Discover the unparalleled stability and speed of an ArrowCat power catamaran. Connect with our experts to schedule your sea trial today and experience the thrill firsthand.

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Boat plans, patterns and supplies for the amateur boat builder.

Every year, thousands of amateurs much like yourself build their own boats the proven Glen-L way. Many builders save 50% or more over the price of a factory-built boat. It’s easier than you might think, and it can be a rewarding experience.

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Cabin Skiff

The Mother of All Maritime Links

John's nautical links list, page 31 of 47.

New or Changed Links

Multihulls:

• 2Hulls Inc. (Catamaran, power catamaran & trimaran broker dealers, Fort Lauderdale, Florida)
• Building the Aluminum Catamarans Osram VII and Osram VIII
• Advanced Multihull Designs (AMD, high speed passenger and vehicle ferries)
• African Cats (Builder of cruising sail and power catamarans, Amstelveen, the Netherlands)
• All American Marine (Aluminum Teknicraft catamaran work, passenger and pleasure motorboats, Bellingham, Washington)
• Alwoplast (Builder of large sail/power multihulls, repairs, Valdivia, Chile)
• AmeraCat Custom Catamarans (Builder of commercial or recreational offshore fishing catamarans, Ft. Pierce, Florida)
• American Proas, 1898-1998
• American Sail (Builder of Aqua Cat catamarans, Charleston, South Carolina)
• Aquidneck Custom Boat Builders (Construction, repair and refit of multihulls to 30' beam, composite or other materials, fabrication of composite components, Bristol, Rhode Island)
• The Arctic Ant Aeroboat (Amphibious tetramaran airboat for Arctic conditions, "Don't let the Arctic conditions stop you from doing what the Titanic couldn't, there are no weather conditions unaccessible for the Arctic Ant ," Larsmo, Finland)
• Aspen Power Catamarans (28-40', Burlington, Washington)
• Austal Group (Builder of aluminium vessels including fast ferries, patrol boats, cruise and live-aboard vessels and private motor yachts, Henderson, Western Australia)
• The Austin Outrigger Canoe Club (Lady Bird Lake, Texas)
• Aventure Catamarans (Power and sailing catamarans, Monaco)
• Bailey Custom Boats (Wooden pontoon boats, Statesboro, Georgia)
• Bell Composites, Inc. (Builder of Offshore Catamarans, Powercat motor catamarans, outrigger canoes, Jupiter, Florida)
• Bennington Pontoon Boats
• BoatSmith (Builder of cruising catamarans, West Palm Beach, Florida)
• The British A Class Catamaran Association
• The British Columbia Multihull Society (BCMS)
• Build a Catamaran (Catamaran building logs)
• Building a Woods design Pixie Catamaran in Uruguay (Jeremy Bernal builds a beach cat)
• The Canadian Dart Association (18' catamaran)
• The Canadian Sea Spray Association
• The Catamaran Company (New and used catamarans, sailing vacations, and catamaran services, Fort Lauderdale, Florida)
• Catamaran Cruisers (Fiberglass catamaran houseboats, Columbia, Tennessee)
• The Catamaran Racing Association of Michigan (CRAM)
• Catamaran Sailor Magazine ( ("A NEWSpaper that covers any and all news concerning beach cats")
• The Catapult Inflatable Catamaran Class Association
• C-Dory (Builder of TomCat � power catamarans, Auburn, Washington)
• Choy Designs (Multihull luxury yachts)
• Chris White Designs (Cruising multihulls)
• Coast Catamarans (Developer of the Coast 50 akuminum cruising catamaran, Marseille)
• Corsair Marine, Inc. (Ian Farrier-designed folding, trailerable trimarans, Ho Chi Minh City, Vietnam)
• Custom Fiberglass International (CFI, builder Isotope and Cheshire sailing catamarans, Durham, North Carolina)
• Cypress Cay Pontoons (Custom, luxury and fishing pontoon boats, Fort Wayne, Indiana)
• Dick Newick (Trimaran, catamaran & proa designs)
• The Dick Newick Proa Cheers (Third in the 1968 Transat)
• Dragonfly Sailboats (Folding trimarans 6-12 meters, Fredericia, Denmark)
• ElectraCraft (Builder of electric powered launches and pontoon boats, Westlake Village, California)
• Endeavour Catamaran Corporation (Cruising catamarans, Clearwater, Florida)
• Eric Henseval Yacht Design (Sailing multihulls, France)
• Far East Boats (Manufacturer of sailing multihulls, Jiangsu, China)
• The Farrier/Corsair Trimaran Discussion Group (Discussion of the multihull sailboats designed by Ian Farrier)
• Farrier Marine Inc. (Ian Farrier multihull designs)
• FishCraft (Builder of inflatable drift catamarans, Sisters, Oregon)
• Flaquita (Tacking proa for homebuilders designed by Joe Henry)
• Flats � Cat (Rough water-shallow water power catamaran)
• The Flying Proa (Article by William Alden from Harper's New Monthly Magazine , 1877?)
• Fritz Koschmann's Bolger Double Eagle (Building a catamaran eco-tour boat)
• Fulcrum Speedworks (Builder of UFO foiling sailing catamarans, East Providence, Rhode island.)
• Fusion Catamarans (Kits for 40' composite sail and power catamarans, Australia & Thailand)
• Gary Dierking's Outrigger Sailing Canoes Blog (Photos, drawings, and descriptions of outrigger canoes around the world, Gary's outrigger sailing canoe plans)
• The Gemini Catamaran Owners Association
• Gemini Catamarans (Cruising catamarans, Annapolis, Maryland)
• Godfrey Pontoon Boats
• Grabner (Maker of Happy Cat inflatable sailing catamarans, Haag, Austria)
• Grainger Designs (Raku sailing catamarans, Sensori power catamarans, custom and racing designs)
• Great Lakes Watercraft (Maker of MiniCat inflatable sailing catamarans, Takacat inflatable catamarans, Detroit, Michigan and Windsor, Ontario)
• Green Dream Boats (Builder of Solliner solar catamarans, Gdynia, Poland)
• Gunboat Multihulls (Manufacturer of large sailing catamarans, Wareham, Massachusetts)
• Harris FloteBote Pontoon Boats (Fort Wayne, Indiana)
• Harryproa (Plans, kits & professionally built Harry, Harrigami & Visionarry cruising proas designed by Rob Denney, Australia)
• Hartley Multihull Designs (Sailing catamaran and trimaran plans for amateur builders, New Plymouth, New Zealand)
• Harvey Golden's Thamakau Project (A skin-on-frame Fijian sailing proa)
• The Hawaiian Sailing Canoe Association (HSCA, information and education on the culture of the Hawaiian sailing canoe)
• Henny van Oortmarssen Homebuilding the F-39 Trimaran Fram in the Netherlands
• Hobie (Manufacturer of sailing catamarans and trimarans)
• Hoewa�a Dallas Outrigger Canoe Club (Texas)
• Holopuni Canoes (Maker of paddling and sailing Hawaiian outrigger canoes, Tahoe City, California)
• How to Build a Timber Outrigger Canoe (FAO online pamphlet)
• Hydro Bikes (Pedal powered catamarans)
• l'Hydropt�re (Speed record setting hydrofoil trimaran)
• Incat Australia (Builder of wave piercing and conventional catamaran ferries)
• The International A Division Catamaran Association
• The International Small Catamaran Handicap Rating System (SCHRS)
• The International Tornado Association
• The James Dory Page (Building a Kurt Hughes 30' Cruising Catamaran)
• James Wharram Designs
• The Jarcat Catamarans Discussion Group
• John Shuttleworth Yacht Designs Ltd. (Multihulls, power and sail)
• Jutson Marine Design (Power catamarans, multihull sailboats, Vancouver, British Columbia)
• K-designs (Bernd Kohler's wing in ground effect and multihull vessels)
• Kelsall Catamarans (Designs 18-75')
• The Kent Island Outrigger Canoe Club
• Kevlacat Power Catamarans (Buddina, Queensland)
• Kha Shing Enterprise (KSE, builder of Montefino catamaran motor yachts, Kaohsiung City, Taiwan)
• Kiribati Canoes (Proas)
• The Koehler Multihulls Discussion Group
• Kurt Hughes Sailing Designs (Catamarans and trimarans)
• Lagoon (Builder of luxury sailing catamarans, Bordeaux Cedex, France)
• LeisureCat & AussieCat (LeisureCat power catamarans, marketed in America as AussieCats, Bibra Lake, Western Australia)
• Maine Cat Catamarans (Builder of cruising sail catamarans, Bremen, Maine)
• Manitou Boats (Aluminum trimaran pontoon boats, Lansing, Michigan)
• Mehrrumpfboote (A German catamaran, trimaran & proa site)
• Metz Boats (Small multihull designs and kits by Klaus Metz, Munich, Bavaria)
• Michael Kabua's Riwuit (Toy sailing proa that won the Marshall Islands Independence Day race in 2000)
• The Microship Project (A trailerable cruising trimaran)
• Mike Waller Yacht Design (Stock and custom multihull designs, Australia)
• Mr. Smith's Amazing Sailboats (The high-speed hydrofoil and multihull designs of Bernard Smith: Aerohydrofoils, Monomarans, Fliptackers and Sailloons)
• The Multihull Association of South Florida (MASF)
• The Multihull Boatbuilder Page (A free exchange of building and design information for simple, efficient, economic homebuilt multihulls)
• The Multihull Centre (Multihull building and repairs, Millbrook, Cornwall)
• The Multihull.com Forums (Discusions on everything multihulls plus sailing meetings devoted to multihulls)
• Multihulls Magazine
• Multihull World ("Australasia's multihull magazine")
• MultiMarine (Used multihulls, multihull designs by Michael Leneman, Venice, California)
• Multi Winds International (Maker of the �lan � trailerable trimaran and Extreme � catamarans)
• M. u. H. von der Linden GmbH (Kits for Grainger and Schionning sailing catamarans, Schionning power catamarans, Wesel, Germany)
• The National Mosquito Catamaran Council (Australia)
• The New England Multihull Association (NEMA)
• Newick Nautical Designs (Dick Newick, stock and custom multihull designs, Sebastopol, California)
• New Wave Boat Company, Inc. (Maker of the Hydro Bike Explorer pedal catamaran)
• Nichols Brothers Boat Builders (Large power passenger catamarans, Freeland, Washington)
• Nichols Diversified Industries (Custom aluminum and steel power passenger catamarans and trimarans to 65', Freeland, Washington)
• Nickels Boat Works (Manufacturer of WindRider & Astus trimarans, Burton, Michigan)
• Noosa Cat (Power catamarans, Australia)
• The Northwest Multihull Association (NWMA)
• The Northwest Multihull Association Discussion Group (NWMA)
• The Norwegian Multihull Association (Norsk Flerskrog Seilklubb, the national class organisation for multihull sailors, including Hobie Cat)
• The Oahu Hawaiian Canoe Racing Association (OHCRA)
• The Offshore Multihull Association (OMA, promoting offshore multihull classes at racing events around the world)
• On The Wire Back Issues Online (Ezine for Hobie sailors)
• Pacific Proa Company (Flying proas, Sausalito, California)
• Pantawee Marine (Builder of composite multihulls, both power and sail, up to 18 meters, Thailand)
• The Paper Tiger Catamaran International Association
• Paritet Boats (Manufacturer of high speed aluminum power catamarans, Moscow, Russia)
• Pedigree Cats Inc. (Custom multihulls 46-136', Raymond, Washington)
• The Polynesian Catamaran Association (Wharram catamaran admirers club)
• The Polynesian Voyaging Society
• Princecraft Boats (Manufacturer of aluminum pontoon boats, Princeville, Qu�bec)
• ProaBoat ("The web site for proa boat owners, builders, and designers")
• The Proa FAQ
• Proa File (Michael Schacht's online journal "focused on the multihull sailing canoes of the Pacific Islands as object lessons in sustainable design")
• Proa Web Sites (Linklist at Pacific Proa Company)
• ProPhish (Manufacturers of the WaterSkipper inflatable catamaran pedal boat)
• The Queensland Multihull Yacht Club (Brisbane)
• Q-West Boat Builders (Builder of catamaran passenger ferries up to 40m, Wanganui, New Zealand)
• Ranger Boats (Builder of pontoon boats, Flippin, Arkansas)
• Running Tide Yachts, Ltd. (Monohull and multihull designs with a mast-aft sailing rig and a 65' gamefishing sailing catamaran)
• The Sailrocket World Record Speed Sailing Attempt (A British hydrofoil proa)
• The San Francisco Outrigger Canoe Club (SFOCC, Hawaiian outrigger canoeing)
• Scott Brown Mutihulls (Broker specializing in used Wharram catamarans and other multihull sailboats, Landrake, Cornwall)
• SeaCycle (Pedal powered catamarans, Adrian, Michigan)
• The Searunner Design Parnership (John Marples and Jim Brown, cats and tris, sail and power)
• The Searunner Home Page (Fan page for Jim Brown's classic cruising trimarans)
• The Searunner Trimarans Owners' Association
• Sea Speed Aluminium Catamaran Design (Power catamarans, Brisbane, Australia)
• Schionning Designs (Sailing and power mulithull plans and kits, Tea Gardens, New South Wales)
• The Shearwater Catamaran Class Association
• Skinny Hull Magazine (Sailing canoes and kayaks, proas and similar style boats)
• SLO Sail and Canvas (Trampolines for production catamarans, San Luis Obispo, California)
• Small Trimarans (A sailing community for small trimaran enthusiasts)
• Solar Boats (Importer and distributor Solliner solar catamarans, Perth Western Australia)
• South Bay Pontoon Boats (Middlebury, Indiana)
• Starcraft Marine (Manufacturer of pontoon boats, New Paris, Indiana)
• The Stiletto Catamaran Network
• Stiletto Catamarans (Builder of small cruising catamarans, Columbia, North Carolina)
• Still Water Design, Inc. (Ultralight motor catamarans for low wake environments, Chelsea, Massachusetts)
• Sylvan Marine (Maker of aluminum pontoon boats, New Paris, Indiana)
• Taipan America (Taipan and Boyer A-Class catamaran dealer)
• The Taipan Catamaran Association Of Australia
• Taylor Pacific Proa - An Experiment in Variable Geometry (Designs by Douglas Taylor)
• Team Scarab Multihulls (Sailing trimaran plans by Ray Kendrick, Australia)
• Technicomposit (Builder of high perfpormance composite multhulls, Antibes, France)
• The Texas Outrigger Canoe Club (Surfside Beach, Texas)
• Tiny Dancer (21' windsurfer rigged proa by Ted Warren)
• TomCat Boats (Daysailing and sport cruising catamarans, Newmarket, Ontario)
• Tony Bigras' Cruising Catamaran Page
• The Toronto Multihull Cruising Club
• The Traverse Bay Outrigger Canoe Club (Traverse City, Michigan)
• U-Fab Pontoon Boat Kits (Pontoon boats, houseboats and floating docks, Ottawa, Ontario)
• The Unicorn Catamaran Class Association
• The US A-Class Catamaran Association
• The US Formula 18 Class Association
• Warren Multihull Designs (Ted Warren)
• WaveWalk, Inc. (Builder of paddled catamarans, Sharon, Massachusetts)
• The West River Catamaran Racing Association (WRCRA, weekly catamaran racing in Galesville, Maryland and on the Chesapeake)
• Weta Marine (Builder of sailing trimarans, North Shore City, New Zealand)
• Wharram Builders and Friends (A photo & discussion forum for Wharram design enthusiasts)
• Whitacre Catamarans (Semi-custom performance cruising sailing catamarans, Anacortes, Washington)
• The Windrider Trimaran Forum
• Woods Designs (Sailing catamaran plans for home and professional builders by Richard Woods)
• WorldCat (Builder of WorldCat, Glacier Bay Edition and Livingston power catamarans, Tarboro, North Carolina)