Naval architects go to great lengths to assure that the center of gravity of their designs remains substantially below the metacenter.
With Éric Tabarly, he participated in the conception of a multihull on hydrofoils, named l'Hydroptère, with a team of engineers, many of them from the aeronautics industry.
The Nacra 17 catamaran was selected for the 2016 Olympic games in Rio de Janeiro, Brazil, for the sailing category "mixed multihull".
He was, in particular, the first to build a multihull of composite material, Ribourel, then a trimaran with long floaters, Poulain, at the helm of which he set in 1989-1990 the single-handed round the world speed record.