ACRONYMS USED IN THIS MANUAL
CEMF Counter Electro-magnetic Force
DGPS Differential Global Positioning System
GGA Global Positioning System fixed data
(NMEA standard)
GLL Geographic position (NMEA standard)
GPS Global Positioning System
GSA Global Positioning System, dilution of position,
active satellite (NMEA standard)
GSV GPS satellites in view (NMEA standard)
LED Light Emitting Diode
LNA Low Noise Amplifier
NCC Network Control Centre
NMEA National Marine Electronics Association
(Standard for interfacing marine electronic
devices)
RF Radio Frequency
RTCM Radio Technical Commission Maritime
VTG ‘Track mode good’ and ‘ground speed’ (NMEA
standard)
ZDA Time and date (NMEA standard)
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