Abstract: A process for manufacturing a rigid aquatic floating object including an elongate three-dimensional external profile having in total a main length extending from its nose to its tail, a thickness, a width, a deck and an underside. The process includes a) digitally modelling the floating object to be manufactured, b) producing a hollow and apertured internal skeleton by additive manufacturing/3D printing of a multitude of plastic wires that are locally connected to one another geometrically and that reproduce a three-dimensional mesh obtained in a), c) placing the result under vacuum and bonding at least one composite sheet made of fibre and resin around the skeleton forming a shell, d) applying successive fibre-and-resin layers so as to reinforce, via stratification, the shell of step c), and e) finishing the external surface of the stratified sheets made of fibre-and-resin composite by sanding to obtain the final shape of the floating object.