An offshore support vessel, Coastal Liberty, operated by Acta Marine in the German Wadden Sea, has successfully transitioned to using green hydrogen to minimize environmental impact. The vessel's operator decided to install eCap Marine's containerized hydrogen-electric energy system on board. This system, certified by DNV, enables the vessel to operate without producing any emissions by utilizing hydrogen and batteries. eCap Marine's innovative design includes Ballard FCwave fuel cells, a maritime battery system, and a sustainable green hydrogen production facility powered by offshore wind. The installation is scalable for larger commercial ships, offering enhanced safety features and reduced vibrations for the crew. The project highlights a significant step towards sustainable maritime operations and showcases the potential for green hydrogen in the marine industry.