A sailing vessel has a hull, two outriggers, one on either side of the hull, a rudder, and rigging supporting at least one sail. Wings are secured to the outriggers and arranged to be located below the surface of the water during sailing. The leeward wing being arranged, as the vessel moves through water, to exert an upwards directed force and the windward wing being arranged to exert a downwards directed force to counteract the rotational force from the sails.