Abstract: A rigging and sail system for a sailboat including a rotatable mast having mounted thereon for rotation therewith, a pair of upper and lower booms extending transversely of the mast. The booms are connected to the mast through upper and lower tension members extending between the mast and the outer ends of the booms respectively and vertical fore and aft tension members extending between outer end portions of the booms on opposite sides of the mast. A pair of sails such as a main and jib are sheeted to and between the booms on opposite sides of the mast to be movable with the booms relative to the hull, and with the jib being movable relative to the booms to allow self-tacking during use merely upon steering the sailboat across the wind.