NOVELTY - The sailing vessel (20) has a hull assembly (21) having a left planing surface (22) positioned on vessel left side and a right planing surface (24). A mast assembly (43) is connected to the hull assembly and extends upwards from the rear of the hull assembly. A sail device (34) is connected to the mast assembly at an upper connection point near upper end the mast assembly. Lower connection point is movable relative to the hull assembly at the left side of the hull and to a position on the right side and vice versa such that rotation axis of hull assembly is variable.    USE - Sailing vessel.    ADVANTAGE - Provides a fast sailing device that can be sailed with more than one person since it is free of a downward vertical wind component during sailing and has a smaller forward bending moment. Stays on course well while experiencing a smaller drag force from the water during sailing. Combines the favorable qualities of a windsurf board and a catamaran. Provides a sailing vessel that can jump out of the water and make radical turns and spectacular moves. Obtains good planing characteristics which allow the vessel to plane on the water rather than to plow through the water, to decrease and even minimize drag forces from the water. Inclined orientation of the sail device allows an upward vertical component of the wind force to be created during sailing, lifting the sailing vessel from the water and reducing the displacement and drag force. Reduces the forward bending moment, leading to less nose dip behavior. Rotation axis forms the main longitudinal axis of the sail device which is a natural design that allows easy construction. Allows the user to operate the sail device both when it is positioned on the right side of the sailing vessel. Sail has a larger average width in the lower half as in the upper half of the sail which provides a low pressure point and thus a low forward moment.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a sailing method.    DESCRIPTION OF DRAWING(S) - The drawing shows a diagrammatic front view of the sailing vessel.    Sailing vessel (20)    Hull assembly (21)    Left planing surface (22)    Right planing surface (24)    Sail device (34)    Mast assembly (43)