GRIB file

A compact binary weather-data format (Gridded Binary) used to download forecast wind, pressure, waves, and currents for display on board in GRIB-capable navigation software.

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Related G-terms

G.M.T.

Greenwich Mean Time — the mean solar time at the prime meridian in Greenwich, London. Now …

Gunwale

(Pronounced 'gunnel') The top edge of the hull where deck meets topsides.

GMDSS

Global Maritime Distress and Safety System — the integrated network of satellite and terre…

Grommet

A reinforced ring — usually brass or stainless — set into a sail or cover to accept a line…

GPS

Global Positioning System — the US satellite constellation whose signals let a receiver co…

Gennaker

A hybrid between a genoa and a spinnaker — an asymmetric downwind sail flown from a bowspr…

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