Mainsail Shopping
Mainsail
 

Information About

Mainsail




A mainsail is the most important sail raised from the main (or only) Mast of a sailing vessel.

On a Square Rig ged vessel, it is the lowest and largest sail on the main mast.

On a fore-and-aft rigged vessel, it is the lowest and largest and often the only sail rigged aft of the main mast, and is controlled along its foot by a Spar known as the Boom . A sail rigged in this position without a boom is generally called a Trisail , and is used in extremely heavy weather.

The modern Bermuda Rig uses a triangular mainsail as the only sail aft of the mast, closely coordinated with a Jib for sailing upwind. A large overlapping jib or Genoa is often larger than the mainsail. In downwind conditions (with the wind behind the boat) a Spinnaker replaces the jib.

Traditional fore-and-aft rigs used a Gaff to control the top of the mainsail, sometimes setting a Topsail above it.