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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). | |
GNSSGlobal 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)) | |