Four ammonia-powered ships were announced this week, with a mixture of retrofits and newbuilds. Fortescue Future Industries will convert the MMA Leveque to run on near 100% ammonia fuel within 12 months. Grieg Maritime and Wartsila's MS Green Ammonia vessel has a designer, with LMG Marin engaged to complete a concept by mid next year. And Eidesvik, Aker BP and Alma (formerly Prototech AS) have joined forces to deploy the ammonia-fed fuel cell technology being developed for the Viking Energy project.