AIS
Automatic Identification system
ARCS
Admiralty Raster Chart System
ARPA
Automatic Radar Plotting Aid
CM
Chart Manager
COG
Course Over Ground
CPA
Closest Point Of Approach
CTW
Course Through Water
DGPS
Differetial Global Positioning System
DR
Dead Reckoning
DTW
Distance to Way Point
EBL
Electrionic Bearing Line
ENC
Electronic Navigational Chart
ECDIS
Electronic Chart Display and Information System
EP
Estimated Position
ERBL
Electronic Range and Bearing Line
ETA
Estimated Time of Arrival
ETD
Estimated Time of Departure
GMT
Greenwich Mean Time
GPS
Global Positioning System
GZ
Guard Zone
HDG
Heading
LOP
Line of position
MMSI
Maritime Mobile Service Identtities
MOB
Man Overboard