Appendix 1: Symbols and Abbreviations
AP-11
Abbreviation Meaning
ETD Estimated Time Of Departure
EXT External
FILT Filter / Filtered
GC Great Circle
GND Ground
GPS Global Positioning System
GZ Guard Zone
HDG Heading
HL Heading Line
HSC High Speed Craft
IBS Integrated Bridge System
ID Identification
INS Integrated Navigation System
L/L Latitude / Longitude
LAT Latitude
LIM Limit
LON Longitude
LOP Line Of Position
MAN Manual
MAX Maximum
MIN Minimum
MMSI Maritime Mobile Services Identity Number
MOB Man Overboard
N North
NAV Navigation
NLT Not Less Than
NMT Not More Than
NUC Not Under Command
OS Own Ship
Oth Other
PAST POSN Past Positions
PI Parallel Index Line
POSN Position
R Relative
RAD Radius
RAIN Anti Clutter Rain
REF Reference / Echo reference
REL Relative
RENC Regional ENC Co-ordinating Centre
RL Rhumb Line
RM Relative Motion
RNG Range
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