The pacific proa is a different concept, on each turn the bow becomes the stern (and viceversa..). In this case it´s the mast that is moved sideways.

The site doesn´t explain anything. It just says that it´s a catamaran 30% faster and that the design is done to improve stability and, more importantly, to avoid turtling.

"Le bateau est équipé de notre technologie GRL qui permet de déplacer le mât d'une coque à l'autre.
Cela lui permet d'éviter de chavirer et surtout l'empêche de se retourner."