Maritime transportation represents a cornerstone of global trade and economic exchange; however, it remains one of the most carbon-intensive sectors, contributing roughly 3% of total global CO2 emissions. In response to this challenge, the International Maritime Organization (IMO) has committed to achieving carbon neutrality by 2050, promoting the development of innovative propulsion technologies aimed at drastically reducing greenhouse gas emissions. This thesis explores the feasibility of a hybrid propulsion system integrating a Solid Oxide Fuel Cell (SOFC) with an Internal Combustion Engine (ICE), both operating with non-fossil, potentially zero-emission fuels such as hydrogen and ammonia. The research was conducted within the framework of the SOFFHICE project, a collaborative project involving Politecnico di Torino, the University of Genoa, and the University of Bologna.