Ship's spar is a term used to refer to the various poles and masts of a sailing vessel. The two crossword solutions, GAFF and SPRIT, are both types of spars used on ships. A GAFF is a spar that supports the head of a sail, while a SPRIT is a spar that extends diagonally from the mast to the peak of the sail. Both of these spars are essential components of a sailing vessel and help to provide stability and control.