51' 10" (15.79m)

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HH Catamarans HH50
2021 51' 10" HH CATAMARANS Catamaran HH50 Carbon United States
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The 2021 51' 10" HH CATAMARANS HH50 Carbon Cruiser Catamaran HH Catamarans HH50 is a sail yacht for sale located in United States.
High Performance Carbon Fiber Cruising Catamaran offered by 
Rocknak's Yacht Sales
Worldwide HH Catamarans Agent
Contact the yacht broker to receive more information or schedule a showing of this 2021 51' 10" HH CATAMARANS HH50 Carbon Catamaran Cruiser HH Catamarans HH50 yacht for sale in USA today!

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LENGTH 51' 10" (15.79m)
ASKING PRICE Call for Price
BUILT 2021
BEAM 24' 5" (7.44m)
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Unique Characteristics

What makes the HH50 unique is its ability to sail a percentage of the wind speed much higher than other cruising cats. Being a daggerboard boat you can claw to windward more and increase speed downwind. The HH50 is a high-end performance cruising catamaran all the while offering top level construction and accommodations.

What makes the boat different? Well, first its the design prowess of Morelli and Melvin and the exacting standards of the engineers and staff of HH Catamarans. The HH brand accommodates the small niche of people who demand performance, quality, and high-end accommodations.

Equally important is the experience of Rocknak's to guide you through the build. We have visited with, and know, the key personnel at the factory on a first name basis. Rocknak's has the capability to train you in your boat and provide service and support while you own your new OC50. Ask for recommendations.

Where the HH Catamarans HH50 differs from the HH Catamarans OC50: The HH50 has a carbon  composite hull, deck, and super structure. All the bulkheads, floors, and supporting components are also carbon fiber. The carbon construction allows for lighter weight among other things. The standard mast is carbon fiber and has more strength than an aluminum spar. This opens up the ability to push the envelope by a larger margin. The HH50 has two helms vs one on the OC50. There are other differences as well. Contact scott@rocknaks.com for the full comparison sheet.

On your first sea trial you will find the boat turns quickly, is stable, points much higher than what you have been accustomed to on charter cats, and can be maneuvered easily in port. The transoms stay out of the water, the boat is dry, and the bridge deck design allows for quiet passages.

The boat is predictable, has excellent bridge deck clearance, and exudes quality. Inquire how to see the boat yourself. You will see why visitors at the boat shows and those that have been aboard say the HH Catamaran is their favorite.

See the sailing video shown in this listing under "Videos".


Three and four cabin models available. Your choice of interior finishes and fabrics including actual wood veneer and solid trim or artificial wood with stunning appearance. Flooring is an LVT of Amtico brand and is also highly customizable.

Each boat is designed for long-term and long distance live aboard capability. Even for a performance catamaran there is more than ample storage.

Aft cabins feature queen size berths at normal bed heights. Each cabin is well lit and features a picture window aft opening up the interior. In the 3-cabin Master's version there are full height cabinets inboard including shelves, drawers and hanging lockers. Outboard are half-height chests or cabinets.

The guest hull aft features a full height armor outboard and additional locker space inboard. The forward cabin also has its own cabinets and storage. Under all the berths are cavernous storage possibilities.

In the salon there are two separates settees allowing for a more apartment like feel vs your typical u-shaped catamaran table/settee combination. Headroom is carried all the way forward and can accommodate 6'7" or more.

In the salon is also the navigation station with full navigation instrumentation and ship's controls.

See our interior video shown in this listing under "Videos".



The galley is u-shaped with a three or four burner gas stove and oven. Electrical option is available as an option. A microwave has its own cabinet and there is plenty of counter space for additional appliances. A double sink is standard and a sing "farm" sink is optional. Hot and Cold pressure water and there is an option for a filtered water tap.

Refrigerator and Freezer are of the drawer style and can be doubled if desired. There are several cabinets available with the option for an additional overhead cabinet. Trash is handled in its own enclosed container and it can be accessed by the cockpit entrance as well.


The decks are protected by double are triple lifelines (call to discuss) stretching the entire length forward. Non-skid is built in or use the optional seadek. There is a molded in toe rap for additional protection.

All hatches are flush with drains and face forward for optimum ventilation. This includes the aft cabin hatches.

Storage is unique on the HH50 & OC50 forward. Each hull has a forward locker larger enough to carry the equipment and recreational items that a long-term cruiser would desire. If you let to go with the Intregrel option (call Rocknak's, special order) you open up the generator locker for even more capacity.

The anchor locker contains an electric windlass and separate chain compartment. The bulkhead inside the locker can have a mounted Fortress anchor as a spare.

On top of the salon roof are built in rain gutters with fore and aft drains. There is enough room on the salon and bimini top to accommodate approx. 2kw of optional factory installed solar panels.

Daggerboards and Rudders

Rudders are Carbon Fiber with a Caron Fiber Stock. (see photo of Scott holding a rudder). Spare Rudders and Spare Rudders in a shoal draft configuration are available.

Asymmetrical C-Shaped Daggerboards are Carbon Fiber and tested in a jig for each boat. They are stronger and stiffer than most daggerboards seen on similar catamarans today.



Seating can be varied depending on your requirements. To port is a single full length settee with table. The table can be fixed top or folding top. To starboard can be a day lounge for two or an L-Shaped settee with retracting table. The HH50 has dual helms.

The cockpit sole comes standard in gel coat non-skid or your choice of real or artificial teak. Seadek is also an option. A variety of styles and colors are available for the flooring.

Under the traveller is a storage locker with multiple compartments. If you are using the gas option onboard for cooking the tanks are located under the starboard settee.

Fishrod holders are available as well as fish rod storage. with Rocknak's for best pavement options based on experience.

See our exterior video shown in this listing under "Videos".

Electrical Equipment

Only top of the line equipment is used. The lighting is handled in multiple banks with LED warm color lamps on dimmers. These can be controlled by a variety of switches on board, some duplex, and all can be controlled and dimmed from the C-Zone system.

Fans are multiple speed and quiet, six zone air conditioning with reverse cycle heating and de-humidification is throughout the boat is optional. If you contact Rocknak's we can discuss how you can run a portion of the system on DC power at night for a client ship.

All electrical components are controlled by the onboard C-Zone system through a touch screen. The C-Zone controlled appliances all have a manual override.

Freshwater pumps are go the highest quality as are the bilge pumps. Access to all wiring, components, pumps, supply lines, etc. are all immediately available and well laid out.

Standard Batteries are Lithium-iron phosphate.




Each hull has its own highly insulated hotter tank. Both tanks have a hot/cold mixer valve that is immediately accessible. There are hot/cold taps in each head, shower, and transom shower. A filter water device is available.

Water maker systems are from Spectra in the 400 model as an option. A 700 model from the HH55 can be fitted for customers desiring even more capabilities. Discuss with Rocknak's the energy use and water production of each.

The water tank is located forward of the salon in the bridge deck. It has a clean-out port if needed and accessed through the anchor locker. There is a deck fill directly over the tank.With the capacity of the water maker system onboard it is possible to use only RO water if desired.

The fresh water heads have quite flush water closets and are dual use with water usage controls. Holding tanks are gravity emptied or pumped out though the deck.

Wash down is located forward and aft and the forward system can be fresh water or sea water.


Engines are standard as the Yanmar 3-cyl 40 HP diesels. In addition there is the option for Betamarine 38 HP 4-cyl diesels. The Betamarines can handle the 185 amp 24 volt alternators or the optional Integrel systems. Both systems utilize sail drives that can have their oil changed while the boat is in the water.

Many people have asked about electrical propulsion. Please contact Rocknak's and ask for Scott to open a discussion on this topic.

A 6kw Northern Lights generator is available as an option. It is mounted forward of the salon in its own locker.

Steering is the Jefa system. All components are accessible. Dual autopilots are available (for redundant systems) as an option.

A bow thruster, (1) mounted in the starboard hull, is also an option.


The standard offering is from B&G with a very large set of options available including full sailing analysis, radar, forward looking sonar, autopilots and more.

With your new HH50 you receive complete training from Rocknak's as well as a custom video showing you operation of all your equipment including the nuances of the electronic systems on board.

Rocknak's has experience in electronic navigation instruction having operated specialized electronic navigation training boats in the past.

Sails & Rigging

Your choice of a multiple sailmakers. This includes standard and performance configurations. The mainsail can be square-top or pinhead, forward sails available are Spinnaker, Asymmetrical Spinnaker, Reacher, Solent, and Staysail. Its typical to have a three sail combination on three roller furlers.

The HH50 has a few options to consider. The standard mast is carbon fiber made by Marstrom with K49 Forestay and Cap Shrouds. The diamonds are Nitronic 50 stainless steel. A special HH50R rig is available. Please contact scott@rocknaks.com for full information.

A builder with experience

Hudson Yacht Group has a large, modern facility located right on the water. Resin infusion, 5-axis routers, water jets, a giant autoclave, and traveling gantries are all part of this proper facility.

The magic, however, comes from the experience of the craftsman building the boat. Finishes that have depth and woodworking reflecting hundreds of years of tradition. Electrical assemblies and mechanical systems as a study in how its done. Hardware and component selection that is, well, state of this art.

Well known names in the performance boat industry can be working for you and your project! Consider the experience of Paul Hakes, Riccardo Marton, Thomas Jonsson, James Juan, Paul Smith, and Taka Wung. Smart, exacting, and dedicated to making the HH Catamaran the best available.

Ask Scott scott@rocknaks.com about build options and build locations (new).

Path to ownership

We're an agent for HH Catamarans. Rather than just invite you to call or write, check out who we are and what we can offer you in terms of knowledge and familiarity of the boat. On youTube there are several in-depth videos created for you to learn more detail than you would normally expect. On the website are the most intensive bits of information anywhere on HH Catamarans. You'll see the OC50, HH50, HH55, and the HH66.

And then...get a hold of us. Let's discuss what you are looking for. With HH we can mould to your needs. Want something that looks fast, is fast, and possibly built better than most boats on the dock? Then it could very well be the HH 50 Carbon Catamaran.

About Rocknak's

Rocknaks' Yacht Sales has over 65 years operating full service boat yards with hands on mechanical, electrical, electronic, composite, and wood working capabilities. We have specialized in cruising sailboats and powerboats and have equipped several boats for extended voyaging.

Our history includes  seasonal storage where we assemble and disassemble dozens of boats a year, thousands of pleasurable interactions and transactions, maintaining charter fleets, and sale of new and used boats since the invention of composite construction. Many of the manufacturers boats we have sold over the years have incorporated our design and engineering suggestions into their more advanced models.

We maintain and own a full service facility with infrastructure and personnel. Our indoor heated facilities can accommodate up to 50' monohull and 40' Catamarans. This includes available moorings in two of the most idyllic harbors anywhere. We have established relationships with local boatyards that can haul catamarans up to 38' wide.

Our connections and affiliations expand worldwide to accommodate our traveling clientele.

Many of our customer base have been with us for decades.

Rocknak's offers unique capabilities and knowledge for project management of your new build, training you in its use, and maintaining a lasting relationship years into your ownership.

Listing Marketed by

W. Scott Rocknak
Rocknak's Yacht Sales, Inc
10 Camden St, PO Box 339 Rockport, Maine, 04856 USA

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W. Scott Rocknak
Rocknak's Yacht Sales, Inc