The implementation of the Energy Transition is underway and requires an evolution of propulsion modes, in particular boat power technologies that reduce GHG and particulate emissions and reduce fuel consumption. PROMOVAN H2 aims to define a project to study and model river units representative of the different components of the fleet (service ship, tourism and freight) with the aim of converting energy to hydrogen for existing units circulating in the Auvergne-Rhône-Alpes and South Regions or an innovative design using this energy for the units in project.