Glossary
107
G.2 Abbreviations
BDI
Bearing Deviation Indicator
BTW
Bearing To Waypoint
CDI
Course Deviation Indicator
CMG
Course Made Good
COG
Course Over Ground. The actual direction of your vessel’s
movement over the ground.
dGPS
Differential Global Positioning System
DMG
Distance Made Good
DTG
Distance To Go
EMC
Electro-Magnetic Compatibility
ETA
Estimated Time of Arrival
GPS
Global Positioning System
HDOP
Horizontal Dilution Of Precision. The multiplicative factor that
modifies ranging error. It is caused solely by the geometry
between your vessel and your set of satellites.
MOB
Man OverBoard
NMEA
National Marine Electronics Association (interconnection
standard)
SOG
Speed Over Ground. The rate of movement of the vessel over the
ground.
TD
Time Difference. The difference in time of arrival (measured in
microseconds) of the two Loran signals, one from the master
transmitting station and the other from the selected secondary.
TTG
Time To Go
VMG
Velocity Made Good. The component towards your destination
based on your vessel’s current speed.
WPT
Waypoint
XTE
Cross Track Error
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