Luff rope- Rope sewn into the luff of a sail.
LWL- Length of a boat at the waterline.
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Mainsail- The sail that is attached to main, or largest, mast of a boat.
Luff Rope
Bolt rope. A rope in the luff of a sail. The luff rope is usually used to attach the sail to a mast.
Luffing ...
Mast Slot/Groove - The opening up the back (aft) edge of the mast in which the mainsail luff rope slides when it is hoisted. Some masts have an external sail track.
Her single-spreader rig supported a tall, wooden, pole mast with an unusually large main topsail's luff rope sliding up into a groove.
Sails are designed so that the load and tension is taken down the luff rope, not via the mast lacing, which is simply there to hold the sail to the mast. The lacing should not be loose, just relaxed.
bolt rope - The rope sewn round the edges of sails. Originally made of the very best quality hemp, steel wire is now used for the luff ropes of all racing sails.
To bring a boat head to wind luff rope A line sewn into the luff of a sail lug A fore-and-aft sail almost square in shape that is bent to a yard and. when hoisted and set, it is slung leeward of the mast with its tack well forward.
 See also: Luff, Hull, Rope, Boat, Boom
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