Hybrid Propulsion Systems are developing to become a more efficient way to save energy and prevent the emissions of gases harmful to the environment. This article states that the Ferretti Group has constructed a very innovative hybrid propulsion system. The final project being a yacht over 20 meters in length can cruise the waters in “Zero Emission Mode.” AYT (Advanced Yacht Technology) has helped with the development of this project by providing that the hybrid propulsion system is able to present a diesel-electric function.