Ammonia2-4 | Demonstrating a 2-stroke and 4-stroke large scale ammonia marine engine 01-05-2022 - 30-04-2026 Show more information European Partnerships Zero Emission Waterborne Transport Partnership (ZEWT) ZEWT Partnership Call 2021 HORIZON-CL5-2021-D5-01-14 Proving the feasibility of a large clean ammonia marine engine (ZEWT Partnership)