An innovative project in the United Kingdom is set to revolutionize ocean shipping by testing hydrogen combustion engines on a cargo ship in March 2025. Led by Carnot Engines and funded as part of the UK government's decarbonization efforts, the project aims to validate the technology for scaling up. The partnership includes waste-to-hydrogen producer Compact Syngas Solutions, which will supply 200 kg of hydrogen sourced from biomass for the 40-day sea trials. Carnot Engines received funding to deploy a 50kW hydrogen auxiliary engine demonstrator, emphasizing the importance of hydrogen combustion engines for long-distance ocean-going cargo vessels. By utilizing technical ceramics in their engines, Carnot has significantly improved engine efficiency, achieving a break thermal efficiency of 70 percent. They highlight the engines' ability to reduce fuel consumption and costs, while emitting negligible levels of CO2, NOx, and PM. The project will involve testing the engine at Brunel University before installing it on one of Carisbrooke Shipping's K-class cargo ships. The trial, set to run for 40 days in the Irish Sea, aims to demonstrate the potential for scaling up to 200 to 400kW auxiliary engines and eventually a 1 to 10MW main engine. This initiative showcases the innovative use of hydrogen technology in the maritime sector and its significant environmental benefits.