Removable Device with Foldable Floats for Transforming a Monohull Vessel into a Multihull Vessel and Vessel Comprising the Device

Device (1) for transforming a monohull vessel (2) into a multihull vessel, characterized in that it comprises:

• A support structure (3) that is provided to be attached in a removable manner to
• the vessel (2), whereby this support structure (3) has a geometric axis AA′ which, when the structure (3) is in a multihull configuration position, is horizontal or approximately horizontal, and when projected in the horizontal plane, has an angle of more than 30 degrees with a horizontal geometric axis that is secant to it and that is contained in the longitudinal vertical geometric plane (PP′) that contains the keel line of the vessel (2),
• And at least one lateral float (4) that has a longitudinal axis (FF′) that is
• contained in the geometric plane that contains its keel line, whereby said float (4) is made integral with this support structure in an articulated manner around at least one geometric axis (BB′) that is secant and oblique to the axis (AA′), and whereby, by its longitudinal geometric axis (FF′), said float (4) can occupy a first deployed stable position along which it is parallel to the geometric plane (PP′) of the vessel (2), and, by the lowest point of its keel line, it is placed under the geometric axis (BB′), and a second folded stable position that is separated from the preceding position at an angle.