square-rigged vessel. Brigantine A two-masted vessel, square-rigged on the foremast and fore-and-aft rigged on the main. Caravel A much smaller, two, sometimes three-masted ship. Carrack Clipper A fast multiple-masted sailing ship, generally used by merchants because of their speed capablities. Cog Collier A vessel designed for the coal trade. Dreadnought An