To achieve significant reduction in greenhouse gas emissions in shipping and enable ship owner’s to eventually phase them out entirely renewable fuels, such as ammonia, play a crucial role. However, much is still unknown regarding application of ammonia as a marine fuel. An ammonia carrier is used as basis to perform the study identifying the marine technical feasibility and performance of ammonia. Furthermore, a safety analysis is performed on the system level providing the first design principles for ammonia powered vessels. The results of this theoretical research will be presented including an outlook on new developments on the implementation of ammonia as a marine fuel.