GPS

Global Positioning System — the US satellite constellation whose signals let a receiver compute its position, heading, and speed over ground almost anywhere on Earth; today typically combined with other GNSS signals for better accuracy.

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Related G-terms

Ground tackle

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

GRIB file

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

Gennaker

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

Galvanic isolator

A device fitted in the shore-power earth conductor to block low-voltage galvanic currents …

Gooseneck

The articulated fitting that joins the forward end of the boom to the mast, allowing the b…

GNSS

Global Navigation Satellite System — the umbrella term covering all satellite positioning …

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