The maritime sector plays a crucial role in global trade but remains a significant contributor to greenhouse gas emissions, accounting for approximately 3% of global CO₂. In alignment with the International Maritime Organization's goal of achieving carbon neutrality by 2050, this thesis investigates the hybridization of Solid Oxide Fuel Cells (SOFCs) with Internal Combustion Engines (ICEs) fueled by natural gas for maritime applications. Conducted within the framework of the SOFFHICE project — a nationally funded collaborative project between Politecnico di Torino, the University of Genova, and the University of Bologna — this study assesses the feasibility and performance of a hybrid SOFC-ICE system considering the power demand profile of an existing short-sea ferry as case study.