The Global Maritime Distress Safety System (GMDSS) is an internationally-agreed set of safety procedures and types of equipment used to increase safety and make it easier to rescue distressed ships, boats and aircraft
GMRS
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General Mobile Radio Service. Frequency band in which licensed radios are allowed to be used. Operates within 462.550 - 462.775MHz and 467.550 - 467.775MHz. Some channels are shared with FRS
GMSK
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Gaussian Minimum Shift Keying
GND
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Ground
GPS
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Global Positioning System. System, which provides the geographic location. This service uses American military satellites, which have been made available for civilian use
