The FULLY RIGGED SHIP type of sailing vessel has a minimum of three masts, FORE MAST, MAIN MAST and MIZZEN MAST. All of the masts have horizontal yards which carry the square sails, but the MIZZEN MAST also carries fore and aft sails called SPANKER and GAFF TOPSAIL. The triangular sails on the bow are called HEADSAILS.
The BARQUE RIGGED type of sailing vessel has a minimum of three masts. The FORE MAST and MAIN MAST have horizontal yards which carry the square sails. There are no yards or square sails fitted to the MIZZEN MAST and this mast only has fore and aft sails fitted, these are called the SPANKER and GAFF TOPSAIL. The triangular sails on the bow are called HEADSAILS.