On most occasions, before a boat can be placed on the market or put into service, it must obtain a certification issued at the end of a homologation process. This process of homologating and certifying a boat is often not very well known, sometimes leading to frustration and loss of time and money. In this course, we present the process of homologating and certifying a boat in the European Union in a clear, concise, and appealing way. It covers the European Recreational Craft Directive 2013/53/UE (RCDII or RCD2) and focuses on the key elements to obtain a boat's CE marking.