To steer the boat more into the wind, thereby causing the sails to flap or luff. The sail set on the mainmast. The line that controls the angle of the mainsail in its relation to the wind. The vertical pole or spar that supports the boom and sails. The top of the mast.
Some masts have an external sail track.
The fitting in the bottom of the boat in which the bottom or heel if the mast sits. Fittings on the mast to which the forestay and shrouds attach. A line used to haul out the clew or after corner of a sail on the boom. Passing another vessel. A rope secured in the bow of a small boat, used for tying up or towing.