GMDSS - GLOSSARY OF TERMS


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G

G3E

A phase

GEOLUT

A Local User Terminal in the Cospas– Sarsat system for receiving signals from geostationary satellites fitted with Cospas–Sarsat packages. See also LUT.

Geostationary satellite

A satellite whose period of revolution is equal to the period of rotation of the earth and whose circular and direct orbit lies in the plane of the Earth’s equator; that is, a satellite which remains in the same relative position to any point on Earth. Approximate altitude of satellite is 36 000 km above earth’s surface.

GHz

Gigahertz (1 000 000 000 hertz). A measurement unit of radio frequency, oscillation and vibration equaling 1 000 000 000 cycles per second.

GMDSS

Global Maritime Distress and Safety System.

GMT

Greenwich Mean Time (see also UTC).

GNSS

Global Navigation Satellite System (eg. GPS,Glonass, Galileo).

GOC

General Operator’s Certificate of Proficiency

GPS

Global Positioning System. A satellite

GT

Gross Tonnage (replaces Gross Registered Tonnage (GRT))