Gaff

On a four-sided fore-and-aft sail, the spar that supports the sail's upper (head) edge.

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Related G-terms

Genoa

A large headsail whose clew overlaps the mast, giving extra upwind drive compared with a w…

Great Circle

The shortest path between two points on the Earth's surface — an arc of a circle whose pla…

GRIB file

A compact binary weather-data format (Gridded Binary) used to download forecast wind, pres…

Grab bag

A watertight bag pre-packed with survival essentials (flares, water, food, EPIRB, handheld…

Gybe

See jibe — a turn in which the stern passes through the wind.

Ground tackle

The collective name for the anchor and its rode (chain, warp, swivels, and shackles).

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