A small vessel of about 20 tons dating from the 16th century, with two masts, normally both square-rigged, but occasionally with a lugsail on the mainmast. Later the square rig was abandoned for a schooner rig. A pinnace carried oars as well as sails. In early voyages of exploration the pinnace was also used as a small ship accompanying the explorers' larger vessels. Pinnace also refers to a ship's boat which could be rowed with up to sixteen oars, or sailed.