Italian architecture firm MASK Architects has released details of its 85-meter superyacht concept, ONYX H2-BO 85, featuring an innovative hydrogen propulsion system. The vessel utilizes seawater electrolysis combined with hydroelectric turbines to generate power, aiming to reduce fossil fuel dependency during short cruises.The system works by extracting seawater, which undergoes filtration and desalination before entering an electrolysis chamber. An electrical current then separates the water molecules into hydrogen and oxygen. The collected hydrogen serves as fuel for engines, generators or fuel cells, with excess stored in tanks for backup power."While producing hydrogen from seawater is feasible, it requires specialized equipment and expertise," noted the studio. "Collaboration with marine engineering and hydrogen technology experts would be essential."The yacht's design features a narrow profile with sport yacht influences. Renderings show contemporary interiors incorporating what the designers describe as "sumptuous" and "eco-conscious" materials. Leisure areas include a sunbathing foredeck, al fresco dining space on the sundeck, and an aft swimming pool.Technical specifications reveal the hydroelectric turbines capture kinetic energy from surrounding water, potentially eliminating the need for large fuel reserves. The studio claims this approach could offer long-term cost savings given rising fuel prices, though no specific efficiency data was provided.The concept emerges as the maritime industry faces increasing environmental regulations. While hydrogen propulsion promises zero local emissions, challenges remain regarding the energy-intensive electrolysis process. The studio suggests supplementing the system with renewable energy sources like solar panels, though these are not shown in current renderings.At 85 meters, ONYX H2-BO 85 would rank among larger superyacht concepts, though no construction timeline or potential shipyard partners were disclosed. The project represents one of several recent attempts to develop cleaner propulsion systems for luxury vessels, joining concepts using batteries, fuel cells and alternative fuels.MASK Architects, known for futuristic design proposals across maritime and aviation sectors, has not indicated whether the concept has attracted client interest. The studio typically focuses on conceptual work rather than production-ready designs. Industry observers note that while hydrogen shows promise for maritime applications, infrastructure limitations and storage challenges remain significant hurdles for widespread adoption.The release of additional technical details suggests ongoing development of the concept, though no sea trials or prototype construction have been announced. The project joins a growing portfolio of eco-conscious yacht designs as the industry explores solutions to meet tightening environmental standards.Credits: MASK Architects
July 23, 2025