Italian architecture firm MASK Architects has unveiled its latest superyacht concept, the 85-meter ONYX H2-BO 85, which features an innovative hydrogen propulsion system. The concept aims to reduce fossil fuel dependency during short cruises by utilizing seawater electrolysis combined with hydroelectric turbines to generate power. The hydrogen is extracted from seawater through a process that involves filtration, desalination, and electrolysis, with the excess stored in tanks for backup power. While the system shows promise for reducing local emissions, challenges remain due to the energy-intensive electrolysis process. The studio suggests potential solutions such as supplementing with renewable energy sources like solar panels. The design of the yacht includes a narrow profile with sport yacht influences and contemporary interiors using eco-conscious materials. Leisure areas on the yacht comprise a sunbathing foredeck, an al fresco dining space, and an aft swimming pool. Technical specifications reveal the use of hydroelectric turbines to capture kinetic energy from water, potentially reducing the need for large fuel reserves. Despite the promising aspects of the concept, no specific efficiency data was provided. The project reflects the industry's shift towards eco-conscious designs to meet environmental standards, with MASK Architects focusing on ongoing development of cleaner propulsion systems. While the concept's feasibility is acknowledged, collaboration with experts in marine engineering and hydrogen technology is deemed essential due to the specialized equipment required. The release of additional technical details hints at continuous progress in the development of the concept, although no construction timeline or partners have been disclosed yet. As the maritime industry faces stricter environmental regulations, hydrogen propulsion systems like the one proposed by MASK Architects represent a step towards sustainable solutions amidst infrastructure and storage challenges for widespread adoption.