Mainsail
The mainsail is a sail located on the main mast of a sailing vessel. It is typically the largest and most important sail on the boat, providing the primary source of propulsion. The mainsail is attached to the mast and boom, and is controlled by a system of ropes and pulleys known as the mainsheet. The shape and trim of the mainsail is critical to the performance of the boat, and adjustments are made constantly to optimize its efficiency. The mainsail can be reefed (reduced in size) in heavy winds to prevent damage to the sail and maintain control of the boat.
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