The Breton ZEPH2 consortium, consisting of Zéphyr, Borée, Piriou, Sofresid Engineering, Entech, and ComposiTIC, is at the forefront of developing a carbon-free service vessel for the maritime industry. The consortium has won a project call by the Brittany Region and presented a design study for an offshore maintenance vessel that will significantly reduce carbon emissions by utilizing hydrogen for propulsion and fuel consumption. By hybridizing power sources, the vessel is projected to achieve a 50-70% carbon reduction compared to traditional diesel-powered ships. With a focus on servicing offshore wind farms, the vessel promises to save up to 670 tonnes of CO2 equivalent per year. The innovative design includes fuel cells running on hydrogen, offering unparalleled power in the maritime sector. The consortium's approach involves integrating various technologies like supporting profiles and composite materials to optimize vessel efficiency and decrease hydrogen consumption, aiming for a 70% decarbonization during operational phases. If the project is approved, it will progress to detailed studies, construction, and the eventual launch of the first vessel. The target market for the ZEPH2 project includes wind farm maintenance in France and Europe, with contracts spanning 5 to 10 years, showcasing a commitment to sustainable practices within the maritime industry.