A boat is a floating architecture that can move an change course and bearings; it follows that interior designers working on board have to face with a light tha can change unexpectly, so the lighting project on board becomes a stimulating challenge. The most interesting projects, actually not yet a lot are able to manage the natural light as a topic, to trasform it in a design material used to advantage it's changeable nature; usually, in these projects, the natural light works with the artificial one reaching remarkable results