Windsurfing Glossary

Batten: Carbon or epoxy “stays” running across the sail giving it support.

Camber: A preformed V shaped design attaching battens to the mast, gives the sail more stable draft.

Clew: Outer corner of the sail.

Downhaul: Amount of pull (via line & pulley) down on a sail creating bend in the mast.

Epoxy board: Fiberglass over foam core using epoxy resin.

Foot: Bottom section of the sail

Glass (polyester) board: Fiberglass wrap over foam core using polyester resin.

High End: Ability of a sail to perform in high winds.

Head: Top section of the sail.

IMCS: Indexed flexibility rating for mast stiffness.

Jibe: Down wind turn. Tail of board passes through the eye of the wind.

Leach: Trailing (loose) edge of the sail

Length: Size of the board tip to tail

Low End: Ability of a sail to perform in low wind.

Luff Panel: Panel next to the luff sleeve – transition to monofilm

Luff Sleeve (sock): Sleeve the mast runs up.

MCS: Flexibility rating for mast stiffness.

Monofilm: Clear panels on sails, a type of plastic.

Outhaul: Amount of pull (via a line & pulley) outward toward the clew.

Plastic board: Shell over foam core. Polyester (glass) board: Fiberglass wrap over foam core using polyester resin.

RAF: Non-cambered rotating assymetrical foil.

Rail: Side of the board.

Rail tuck: Shape of the rail in relation to the bottom of the board.

Rig: Complete sail, mast, and boom.

Rocker line: Amount of lift from tail to tip.

Spin out: Fin slides to the side in the water, caused by too small of fin with too big of sail

Tack: Up wind turn passing through the eye of the wind.

Triax: A sandwich material – clear plastic with carbon stringers running between the layers.

Twist: Amount a sail can bend/flex (laterally) when under wind load.

Universal Joint: The piece that connects the rig & board.

Vinyl: Window material in wave sails

Volume: Amount of floatation

Width: How wide the board is, measured at the “beam” (mast track).