The term SUPPORT SAIL is used to describe two components of a sailing vessel. The first component is the SPAR, which is a wooden or metal pole that is used to support the sails and rigging of the boat. The second component is the MAST, which is a tall vertical pole that supports the sails and rigging of the boat. Together, these two components provide the necessary support for the sails and rigging of the boat, allowing it to move through the water.