Good to Sea

Designers of green maritime transport

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Green Catamarans

A clean and viable solution for forward-looking ship owners worldwide.


On-going developments in hydrogen technology and infrastructure are creating commercially attractive options for passenger and cargo transport industries worldwide.


By designing catamarans equipped with electro-hydrogen propulsion, our team of engineers is re-engineering the propulsion system and the vessel architecture to reduce mass, optimise energy efficiency and allow this new energy vector to be integrated on board in complete safety.


Green Navy will offer new, adaptable, efficient and environmentally friendly solutions for operators to buy or lease – fuelled by public awareness and demand.



Modular superstructure to suit your needs

What differentiates Green Navy is our flexibility.

The Green Navy electro-hydrogen solution is uniquely adaptable to every operator’s budget. Any PAX, CARGO or PAX/CARGO layout can be built with a carefully calculated number of batteries and hydrogen bottles depending on the needs of the end user optimising weight/autonomy and charge cycles.


Green Navy vessels will also offer an extremely advantageous ratio in terms of energy consumed, weight of vessel and distance travelled.


Length overall: 25 m

Beam overall: 10,30 m

Construction: Aluminium 5083

Classification: Bureau Veritas ● HULL ● MACH


Power: 2x 130kW @ 3000rpm

Standard battery capacity: 2x 320 kWh

Optional battery capacity: 2x 480kWh

Maximum H2 storage: 2x 100 kg
Fuel cell: 2x 70 – 100 kW







Tons of Freight

Our PAX catamaran will offer unparalleled performance in the world of new maritime energies in terms of navigational comfort, independence, and operational costs.

  • Complete reduction of noise pollution and odour nuisance – an exceptional passenger experience compared to a diesel vessel.
  • Simplified design – a very attractive solution for commuters and tourists.

CARGO 0 passengers / 30 tons of freight

Our CARGO catamaran will be your carbon free freight solution.

  • Adaptability of hydrogen storage to the desired autonomy Useful area of 70m2 dedicated to goods.
  • Accessibility to city centres in an environmentally friendly, safe and cost-effective way: a zero-emission goods transport solution, offering an alternative to congested road transport networks.

MIXED 100 passengers / 20 tons of freight

Our Mixed version is intended to transport both goods and passengers. A versatile concept,

this multi-purpose catamaran allows to adapt your activity to suit market opportunities and regional needs.


Expertise and innovation

The Merré shipyard has been a specialist in naval construction for over a century and produces Green Navy hulls in France. Merré works with the French national navy force, port authorities, shipowners and operators. The hull construction of our first catamaran in PAX configuration, named ‘Prometeo’, commenced in the third quarter of 2023.



Electro-hydrogen propulsion


Our ships will be powered by electric motors powered by NMC Lithium-ion batteries. They will carry hydrogen stored at 350 bars as a Range-Extender. The fuel cells will combine this carbon-free and renewable energy source with the oxygen present in the air to produce electricity and recharge the battery fleet. During their operation, PEM fuel cells will produce water vapor for their only emission.


Electro-hydrogen propulsion is therefore cleaner than any other motorised propulsion using fossil fuels because it does not produce greenhouse gas emissions or air pollutants. It is silent, odourless and vibration-free, and it offers superior efficiency. These major benefits make Green Navy’s electro-hydrogen propulsion better for the environment and closer to the global goal of clean and sustainable shipping.


The Green Navy solution goes much further.

Green Navy will be the first company in Europe to implement this technology on board in the context of passengers and goods which makes our catamaran unique in the marketplace.


The vessel will be supplied with green hydrogen to ensure a complete carbon-free chain. In addition, we are developing an innovative transmission system with an optimised reduction system that develops greater torque at reduced propeller rotation speed. This will improve efficiency and reduce the energy consumption of our vessels.



Our commitment to efficiency has seen us work closely with G-Sea Design on the ultimate precision of structural calculations. This has resulted in a lightweight catamaran prototype with exceptional strength and rigidity – tested in all weather conditions and in passenger/cargo/ and combined configurations.


We are designing and producing in France a clean technological vessel that is carbon-free with low energy consumption, offers full marine capacity, and is available at short notice.


Our team of engineers has optimised the propulsion system and the architecture of the vessel to reduce its mass and provide an adaptable, efficient and environmentally-friendly solution.


Our boats are powered with Green Hydrogen derived from the electrolysis of water using renewable energy.


guillemets GH2 – zero emissions during production and use. guillemets

Impressive performance thanks to an intelligent propulsion management system:

  • Range of 300km at 8.3 knots, approximately 36 sailing hours.
  • Range of 244km at 9.3 knots, approximately 25 sailing hours.
  • Maximum speed of 12 knots, or 14 knots on demand.
Courbe Courbe

Define your project


Let our experienced team help you.


Regardless of your desired configuration, our boats will be available for medium & long-term lease, and outright sale.


Our growing team, which already comprises 12+ dedicated, experienced and enthusiastic individuals, is available to discuss your project and build a solution to meet your needs.

Guy Saillard

Co-founder of Green Navy, Guy is a naval architect and maritime expert with 50 years of experience. He has demonstrated his commitment to carbon-free mobility by working on the design and improvement of precursor boats in this sector – in particular, the Energy Observer and the Planet Solar. We owe to him the design of the Green Navy prototype boat.

Atila Perez

Founder of Green Navy (2019), Atila Perez is committed to reducing the environmental footprint in the maritime transport sector. Born in Mexico, he has lived in France since 1999. After an early career in the catering sector, Atila is now at the helm of three Carrefour retail shops.

Grégoire Lebigot

Partner of Green Navy, Grégoire is also the Chairman and Founder of VALLAIR, a Franco-Luxembourgish group specialising in the maintenance of airliners (MRO), as well as in the recycling activities of mature aircraft, engines and aeronautical components. With a cumulative experience of 30 years in aviation, notably at Airbus and Air France, Grégoire has developed a pioneering aircraft disassembly and cargo conversion business in Europe.

Charles Cardi

Our newly appointed Chief Executive Officer. Cardi is a maritime expert with cross-functional experience and a background in electro-technical studies, he joins the organisation from UNI Bateaux in Ajaccio, Corsica, where he was responsible for all sales and charter operations of motor yachts, catamarans, trawlers and NUC passenger boats.

Click here to read the press release: EN FR


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    Legal Notices

    Green Navy, is a simplified joint-stock company, registered with the R.C.S. of Quimper (France) under number 878 256 296, with VAT number FR95878256296, with a capital share of 162.000 euros, domiciled Route de Port la Forêt 29940 La Forêt-Fouesnant, whose beneficial owners are M. Rafael Perez Martinez et M. Grégoire Lebigot.

    Director of Publication : Monsieur Rafael Perez Martinez

    Email address of the Director odf Publication :

    Company telephone number : +33(0)6 4880 9652

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      Green Navy 97 Rue Sauveur Tobelem 13 007 Marseille / +33 (0)6 48 80 96 52