Annex 2 - Guidelines for the Presentation of Navigation-Related Terms and Abbreviations

1 Purpose

The purpose of these Guidelines is to provide guidance on the use of appropriate navigation-related terminology and abbreviations intended for presentation on shipborne navigational displays. These are based on terms and abbreviations used in existing navigation references.

2 Scope

These Guidelines are issued to ensure that the terms and abbreviations used for the display of navigation-related information on all shipborne navigation equipment and systems are consistent and uniform.

3 Application

3.1 These Guidelines apply to all shipborne navigational systems and equipment including radar, ECDIS, AIS, INS and IBS. When navigation-related information is displayed as text, the standard terms or abbreviations listed in the appendix should be used, instead of using terms and abbreviations which are currently contained in existing performance standards.

3.2 Where a standard term and abbreviation is not available, another term or abbreviation may be used. This term or abbreviation should not conflict with the standard terms or abbreviations listed in the appendix and provide a clear meaning. Standard marine terminology should be used for this purpose. When the meaning is not clear from its context, the term should not be abbreviated.

3.3 Unless otherwise specified, standard terms should be shown in lower case while abbreviations should be presented using upper case.

Appendix - List of Standard Terms and Abbreviations

Term	Abbreviation	Abbreviation	Term
Acknowledge	ACK	ACK	Acknowledge
Acquire, Acquisition	ACQ	ACQ	Acquire, Acquisition
Acquisition Zone	AZ	ADJ	Adjust, Adjustment
Additional Military Layer	AML	AFC	Automatic Frequency Control
Adjust, Adjustment	ADJ	AFT	Aft
Aft	AFT	AGC	Automatic Gain Control
Alarm	ALARM	AIS	Automatic Identification System
Alert Setting	ALERT SET	ALARM	Alarm
Altitude	ALT	ALERT SET	Alert Setting
Amplitude Modulation	AM	ALT	Altitude
Anchor Watch	ANCH	AM	Amplitude Modulation
Antenna	ANT	AML	Additional Military Layer
Anti-Clutter Rain	RAIN	ANCH	Anchor Watch
Anti-Clutter Sea	SEA	ANCH	Vessel at Anchor (applies to AIS)
April	APR	ANT	Antenna
Audible	AUD	APR	April
August	AUG	AUD	Audible
Automatic	AUTO	AUG	August
Automatic Frequency Control	AFC	AUTO	Automatic
Automatic Gain Control	AGC	AUX	Auxiliary System/Function
Automatic Identification System	AIS	AVAIL	Available
Auxiliary System/Function	AUX	AZ	Acquisition Zone
Available	AVAIL	BITE	Built in Test Equipment
Background	BKGND	BKGND	Background
Bearing	BRG	BDS	BeiDou Navigation Satellite System
Bearing Waypoint To Waypoint	BWW	BRG	Bearing
BeiDou Navigation Satellite System	BDS	BRILL	Display Brilliance
Built in Test Equipment	BITE	BWW	Bearing Waypoint To Waypoint
Calibrate	CAL	C	Carried (e.g. carried EBL origin)
Cancel	CNCL	C UP ^{(See note 2)}	Course Up
Cancel All	CNCL ALL	CAL	Calibrate
Carried (e.g. carried EBL origin)	C	CCRP	Consistent Common Reference Point
Centre	CENT	CCRS	Consistent Common Reference System
Change	CHG	CENT	Centre
Chart Display Settings	CHT DISP SET	CHT DISP SET	Chart Display Settings
Chart Management	CHT MGMT	CHT MGMT	Chart Management
Chart Safety Settings	CHT SF SET	CHT SF SET	Chart Safety Settings
Circular Polarised	CP	CHG	Change
Clear	CLR	CLR	Clear
Closest Point of Approach	CPA	CNCL	Cancel
Conning	CONN	CNCL ALL	Cancel All
Consistent Common Reference Point	CCRP	COG	Course Over the Ground
Consistent Common Reference System	CCRS	CONN	Conning
Contrast	CONT	CONT	Contrast
Correction	CORR	CORR	Correction
Course	CRS	CP	Circular Polarised
Course Over the Ground	COG	CPA	Closest Point of Approach
Course Through the Water	CTW	CRS	Course
Course To Steer	CTS	CTS	Course To Steer
Course Up	C UP ^{(See note 2)}	CTW	Course Through the Water
Cross Track Distance	XTD	CURS	Cursor
Cursor	CURS	D	Dropped (e.g. dropped EBL origin)
Dangerous Goods	DG	DATE	Date
Date	DATE	DATE OBJ	Dated Objects
Dated Objects	Dated Objects	DAY/NT	Day/Night
Day/Night	DAY/NT	DBDS	Differential BDS
Dead Reckoning, Dead Reckoned Position	DR	DEC	December
December	DEC	DECR	Decrease
Decrease	DECR	DEL	Delete
Default Settings	DFLT SET	DELAY	Delay
Delay	DELAY	DEP	Departure
Delete	DEL	DEST	Destination
Departure	DEP	DEV	Deviation
Depth	DPTH	DFLT SET	Default Settings
Destination	DEST	DG	Dangerous Goods
Deviation	DEV	DGAL^{(See note 2)}	Differential Galilleo
Differential BDS	DBDS	DGLONASS ^{(See note 2)}	Differential GLONASS
Differential Galilleo	DGAL ^{(See note 2)}	DGNSS ^{(See note 2)}	Differential GNSS
Differential GLONASS	DGLONASS ^{(See note 2)}	DGPS ^{(See note 2)}	Differential GPS
Differential GNSS	DGNSS ^{(See note 2)}	DISP	Display
Differential GPS	DGPS ^{(See note 2)}	DIST	Distance
Digital Selective Calling	DSC	DIVE	Vessel Engaged in Diving Operations (applies to AIS)
Display	DISP	DN	Down
Display Brilliance	BRILL	DPTH	Depth
Distance	DIST	DR	Dead Reckoning, Dead Reckoned Position
Distance Root Mean Square	DRMS ^{(See note 2)}	DRG	Vessel Engaged in Dredging or Underwater Operations (applies to AIS)
Distance To Go	DTG	DRIFT	Drift
Down	DN	DRMS ^{(See note 2)}	Distance Root Mean Square
Drift	DRIFT	DSC	Digital Selective Calling
Dropped (e.g. dropped EBL origin)	D	DTG	Distance To Go
East	E	E	East
Electronic Bearing Line	EBL	EBL	Electronic Bearing Line
Electronic Chart Display and Information System	ECDIS	ECDIS	Electronic Chart Display and Information System
Electronic Navigational Chart	ENC	ENC	Electronic Navigational Chart
Electronic Position Fixing System	EPFS	ENC MGMT REP	ENC Management Report
Electronic Range and Bearing Line	ERBL	ENC UPD STATUS	ENC Update Status Report
ENC Management Report	ENC MGMT REP	ENH	Enhance
ENC Update Status Report	ENC UPD STATUS	ENT	Enter
Enhance	ENH	EP	Estimated Position
Enter	ENT	EPFS	Electronic Position Fixing System
Equipment	EQUIP	EQUIP	Equipment
Error	ERR	ERBL	Electronic Range and Bearing Line
Estimated Position	EP	ERR	Error
Estimated Time of Arrival	ETA	ETA	Estimated Time of Arrival
Estimated Time of Departure	ETD	ETD	Estimated Time of Departure
Event	EVENT	EVENT	Event
Exclusion Zone	EZ	EXT	External
Export Route	ROUTE EXP	EZ	Exclusion Zone
External	EXT	FEB	February
February	FEB	FISH	Fishing Vessel
Fishing Vessel	FISH	FIX	Fix
Fix	FIX	FM	Frequency Modulation
Forward	FWD	FREQ	Frequency
Frequency	FREQ	FULL	Full
Frequency Modulation	FM	FWD	Forward
Full	FULL	GAIN	Gain
Gain	GAIN	GAL	Galilleo
Galilleo	GAL	GC	Great Circle
Geometric Dilution Of Precision	GDOP	GDOP	Geometric Dilution Of Precision
Global Maritime Distress and Safety System	GMDSS	GRAPH INDX	Graphical Index
Global Navigation Satellite System	GNSS	GLONASS	Global Orbiting Navigation Satellite System
Global Orbiting Navigation Satellite System	GLONASS	GMDSS	Global Maritime Distress and Safety System
Global Positioning System	GPS	GND	Ground
Graphical Index	GRAPH INDX	GNSS	Global Navigation Satellite System
Great Circle	GC	GPS	Global Positioning System
Grid	GRID	GRI	Group Repetition Interval
Ground	GND	GRID	Grid
Group Repetition Interval	GRI	GRND	Vessel Aground (applies to AIS)
Guard Zone	GZ	GYRO	Gyro
Gyro	GYRO	GZ	Guard Zone
Harmful Substances (applies to AIS)	HS	H UP ^{(See note 2)}	Head Up
Head Up	H UP ^{(See note 2)}	HCS	Heading Control System
Heading	HDG	HDG	Heading
Heading Control System	HCS	HDOP	Horizontal Dilution Of Precision
Heading Line	HL	HF	High Frequency
Heading Line Off	HL OFF	HL	Heading Line
High Frequency	HF	HL OFF	Heading Line Off
High Speed Craft (applies to AIS)	HSC	HS	Harmful Substances (applies to AIS)
Horizontal Dilution Of Precision	HDOP	HSC	High Speed Craft (applies to AIS)
Identification	ID	I/O	Input/Output
Import Chart	IMPORT CHT	ID	Identification
Import Route	ROUTE IMP	IMPORT CHT	Import Chart
In	IN	IN	In
Increase	INCR	INCR	Increase
Indication	IND	IND	Indication
Information	INFO	INF RED	Infrared
Information Report	INFO REPORT	INFO	Information
Infrared	INF RED	INFO REPORT	Information Report
Initialisation	INIT	INIT	Initialisation
Input	INP	INP	Input
Input/Output	I/O	INT	Interval
Integrated Radio Communication System	IRCS	IR	Interference Rejection
Interference Rejection	IR	IRCS	Integrated Radio Communication System
Interswitch	ISW	ISW	Interswitch
Interval	INT	JAN	January
January	JAN	JUL	July
July	JUL	JUN	June
June	JUN	LAT	Latitude
Latitude	LAT	LF	Low Frequency
Limit	LIM	LIM	Limit
Line Of Position	LOP	LOG	Log
Log	LOG	LON	Longitude
Long Pulse	LP	LOOK AHEAD	Own ship look-ahead
Long Range	LR	LOP	Line Of Position
Longitude	LON	LORAN	Loran
Loran	LORAN	LOST TGT	Lost Target
Lost Target	LOST TGT	LP	Long Pulse
Low Frequency	LF	LR	Long Range
Magnetic	MAG	MAG	Magnetic
Manoeuvre	MVR	MAN	Manual
Manual	MAN	MAN UPD	Manual Update
Manual Update	MAN UPD	MAP	Map(s)
Map(s)	MAP	MAR	March
March	MAR	MAX	Maximum
Maritime Mobile Services Identity number	MMSI	MAY	May
Maritime Pollutant (applies to AIS)	MP	MENU	Menu
Maritime Safety Information	MSI	MF	Medium Frequency
Marker	MKR	MIN	Minimum
Master	MSTR	MISSING	Missing
Maximum	MAX	MKR	Marker
May	MAY	MMSI	Maritime Mobile Services Identity number
Medium Frequency	MF	MON	Performance Monitor
Medium Pulse	MP	MP	Maritime Pollutant (applies to AIS)
Menu	MENU	MP	Medium Pulse
Minimum	MIN	MSI	Maritime Safety Information
Missing	MISSING	MSTR	Master
Mute	MUTE	MUTE	Mute
Navigation	NAV	MVR	Manoeuvre
Normal	NORM	N	North
North	N	N UP	North Up
North Up	N UP	NAV	Navigation
November	NOV	NORM	Normal
October	OCT	NOV	November
Off	OFF	NUC	Vessel Not Under Command (applies to AIS)
Off centred	OFF CENT	OCT	October
Officer of the Watch	OOW	OFF	Off
Offset	OFFSET	OFF CENT	Off centred
On	ON	OFFSET	Offset
Out/Output	OUT	ON	On
Own Ship	OS	OOW	Officer of the Watch
Own Ship Look-Ahead	LOOK AHEAD	OS	Own Ship
Panel Illumination	PANEL	OUT	Out/Output
Parallel Index Line	PI	PAD	Predicted Area of Danger
Passenger Vessel (applies to AIS)	PASSV	PANEL	Panel Illumination
Performance Monitor	MON	PASSV	Passenger Vessel (applies to AIS)
Permanent	PERM	PDOP	Positional Dilution Of Precision
Person Overboard	POB	PERM	Permanent
Personal Identification Number	PIN	PI	Parallel Index Line
Pilot Vessel (applies to AIS)	PILOT	PILOT	Pilot Vessel (applies to AIS)
Port/Portside	PORT	PIN	Personal Identification Number
Position	POSN	PL	Pulse Length
Positional Dilution Of Precision	PDOP	PM	Pulse Modulation
Power	PWR	POB	Person Overboard
Predicted	PRED	PORT	Port/Portside
Predicted Area of Danger	PAD	POSN	Position
Predicted Point of Collision	PPC	PPC	Predicted Point of Collision
Pulse Length	PL	PPR	Pulses Per Revolution
Pulse Modulation	PM	PRED	Predicted
Pulse Repetition Frequency	PRF	PRF	Pulse Repetition Frequency
Pulse Repetition Rate	PRR	PRR	Pulse Repetition Rate
Pulses Per Revolution	PPR	PWR	Power
Racon	RACON	RACON	Racon
Radar	RADAR	RAD	Radius
Radar Overlay	RADAR OVR	RADAR	Radar
Radar Settings	RADAR SET	RADAR OVR	Radar Overlay
Radius	RAD	RADAR SET	Radar Settings
Rain	RAIN	RAIM	Receiver Autonomous Integrity Monitoring
Range	RNG	RAIN	Anti-Clutter Rain
Range Rings	RR	RAIN	Rain
Raster Chart Display System	RCDS	RCDS	Raster Chart Display System
Raster Navigational Chart	RNC	REC EVENT	Record Event
Rate Of Turn	ROT	REF	Reference
Real-time Kinemetic	RTK	REL ^{(See note 3)}	Relative
Receiver	RX ^{(See note 2)}	RIM	Vessel Restricted in Manoeuvrability) (applies to AIS)
Receiver Autonomous Integrity Monitoring	RAIM	RL	Rhumb Line
Record Event	REC EVENT	RM	Relative Motion
Reference	REF	RMS	Root Mean Square
Relative	REL ^{(See note 3)}	RNC	Raster Navigational Chart
Relative Motion	RM	RNG	Range
Revolutions per Minute	RPM	RoRo	Roll On/Roll Off Vessel (applies to AIS)
Rhumb Line	RL	ROT	Rate Of Turn
Roll On/Roll Off Vessel (applies to AIS)	RoRo	ROUTE	Route
Root Mean Square	RMS	ROUTE MON	Route Monitoring
Route	ROUTE	ROUTE PLAN	Route Plan
Route Monitoring	ROUTE MON	RPM	Revolutions per Minute
Route Plan	ROUTE PLAN	RR	Range Rings
Safety Contour	SF CNT	ROUTE EXP	Export Route
Sailing Vessel (applies to AIS)	SAIL	ROUTE IMP	Import Route
Satellite	SAT	RTK	Real-time Kinemetic
Satellite Based Augmentation System	SBAS	RX ^{(See note 2)}	Receiver
Save User Settings	SAVE USR	S	South
S-Band (applies to Radar)	S-BAND	SBAS	Satellite Based Augmentation System
Scan to Scan	SC/SC	SAIL	Sailing Vessel (applies to AIS)
Search And Rescue Transponder	SART	SART	Search And Rescue Transponder
Search And Rescue Vessel (applies to AIS)	SARV	SARV	Search And Rescue Vessel (applies to AIS)
Select	SEL	SAT	Satellite
Select User Settings	USR SET	SAVE USR	Save User Settings
September	SEP	S-BAND	S-Band (applies to Radar)
Sequence	SEQ	SC/SC	Scan to Scan
Set (i.e., set and drift, or setting a value)	SET	SDME	Speed and Distance Measuring Equipment
Ship's Time	TIME	SEA	Anti Clutter Sea
Short Pulse	SP	SEL	Select
Signal to Noise Ratio	SNR	SEP	September
Silence	SLNC	SEQ	Sequence
Simulation	SIM ^{(See note 4)}	SET	Set (i.e., set and drift, or setting a value)
Slave	SLAVE	SF CNT	Safety Contour
South	S	SIM ^{(See note 4)}	Simulation
Speed	SPD	SLAVE	Slave
Speed and Distance Measuring Equipment	SDME	SLNC	Silence
Speed Over the Ground	SOG	SNR	Signal to Noise Ratio
Speed Through the Water	STW	SOG	Speed Over the Ground
Stabilized	STAB	SP	Short Pulse
Standard Display	STND DISP	SPD	Speed
Standby	STBY	STAB	Stabilized
Starboard/Starboard Side	STBD	STAT DISP	Status and Data
Station	STN	STBD	Starboard/Starboard Side
Status and Data	STAT DISP	STBY	Standby
Symbol(s)	SYM	STN	Station
Synchronisation	SYNC	STND DISP	Standard Display
Target	TGT	STW	Speed Through the Water
Target Settings	TGT SET	SYM	Symbol(s)
Target Tracking	TT	SYNC	Synchronisation
Test	TEST	T	True
Time	TIME	TCPA	Time to CPA
Time Difference	TD	TCS	Track Control System
Time Dilution Of Precision	TDOP	TD	Time Difference
Time Of Arrival	TOA	TDOP	Time Dilution Of Precision
Time Of Departure	TOD	TEST	Test
Time to CPA	TCPA	TGT	Target
Time To Go	TTG	TGT SET	Target Settings
Time to Wheel Over Line	TWOL	THD	Transmitting Heading Device
Track	TRK	TIME	Ship's Time
Track Control System	TCS	TIME	Time
Track Made Good	TMG ^{(See note 5)}	TM	True Motion
Trail(s)	TRAIL	TM RESET	True Motion Reset
Transceiver	TXRX ^{(See note 2)}	TMG ^{(See note 5)}	Track Made Good
Transferred Line Of Position	TPL	TOA	Time Of Arrival
Transmitter	TX ^{(See note 2)}	TOD	Time Of Departure
Transmitting Heading Device	THD	TOW	Vessel Engaged in Towing Operations (applies to AIS)
Trial	TRIAL ^{(See note 4)}	TPL	Transferred Line Of Position
Trial Settings	TRIAL SET	TRAIL	Trail(s)
Trigger Pulse	TRIG	TRIAL ^{(See note 4)}	Trial
True	T	TRIAL SET	Trial Settings
True Motion	TM	TRIG	Trigger Pulse
True Motion Reset	TM RESET	TRK	Track
True/Relative Vector	T / R VECT	T / R VECT	True/Relative Vector
Tune	TUNE	TT	Target Tracking
Ultrahigh Frequency	UHF	TTG	Time To Go
Universal Time, Co-ordinated	UTC	TUNE	Tune
Unstabilised	UNSTAB	TWOL	Time to Wheel Over Line
Update Log	UPD LOG	TX ^{(See note 2)}	Transmitter
Update Review	UPD REV	TXRX ^{(See note 2)}	Transceiver
User Chart	USR CHT	UHF	Ultrahigh Frequency
Variable Range Marker	VRM	UNSTAB	Unstabilised
Variation	VAR	UPD LOG	Update Log
Vector	VECT	UPD REV	Update Review
Very High Frequency	VHF	USR CHT	User Chart
Very Low Frequency	VLF	USR SET	Select User Settings
Vessel Aground (applies to AIS)	GRND	UTC	Universal Time, Co-ordinated
Vessel at Anchor (applies to AIS)	ANCH	UWE	Vessel Underway Using Engine (applies to AIS)
Vessel Constrained by Draught (applies to AIS)	VCD	VAR	Variation
Vessel Engaged in Diving Operations (applies to AIS)	DIVE	VCD	Vessel Constrained by Draught (applies to AIS)
Vessel Engaged in Dredging or Underwater Operations (applies to AIS)	DRG	VDR	Voyage Data Recorder
Vessel Engaged in Towing Operations (applies to AIS)	TOW	VECT	Vector
Vessel Not Under Command (applies to AIS)	NUC	VHF	Very High Frequency
Vessel Restricted in Manoeuvrability (applies to AIS)	RIM	VID	Video
Vessel Traffic Service	VTS	VLF	Very Low Frequency
Vessel Underway Using Engine (applies to AIS)	UWE	VOY	Voyage
Video	VID	VRM	Variable Range Marker
Voyage	VOY	VTS	Vessel Traffic Service
Voyage Data Recorder	VDR	W	West
Warning	WARNING	WARNING	Warning
Water	WAT	WAT	Water
Waypoint	WPT	WOL	Wheel Over Line
West	W	WOT	Wheel Over Time
Wheel Over Line	WOL	WPT	Waypoint
Wheel Over Time	WOT	X-BAND	X-Band (applies to Radar)
X-Band (applies to Radar)	X-BAND	XTD	Cross Track Distance

List of Units of Measurement and Abbreviations

Unit	Abbreviation	Abbreviation	Unit
cable length	cbl	cbl	cable length
cycles per second	cps	cps	cycles per second
degree(s)	deg	deg	degree(s)
fathom(s)	fm	fm	fathom(s)
feet/foot	ft	ft	feet/foot
gigahertz	GHz	GHz	gigahertz
hectopascal	hPa	hPa	hectopascal
hertz	Hz	Hz	hertz
hour(s)	hr(s)	hr(s)	hour(s)
kilohertz	kHz	kHz	kilohertz
kilometre	km	km	kilometre
kilopascal	kPa	kPa	kilopascal
knot(s)	kn	kn	knot(s)
megahertz	MHz	MHz	megahertz
minute(s)	min	min	minute(s)
Nautical Mile(s)	NM	NM	Nautical Mile(s)

Notes:

1. Terms and abbreviations used in nautical charts are published in relevant IHO publications and are not listed here.

2. In general, terms should be presented using lower case text and abbreviations should be presented using upper case text. Those abbreviations that may be presented using lower case text are identified in the list, e.g. "dGNSS" or "Rx".

3. Abbreviations may be combined, e.g. "CPA LIM" or "T CRS". When the abbreviation for the standard term "Relative" is combined with another abbreviation, the abbreviation "R" should be used instead of "REL", e.g. "R CRS".

4. The use of the abbreviations "SIM" and "TRIAL" are not intended to replace the appropriate symbols listed in annex 1.

5. The term "Course Made Good" has been used in the past to describe "Track Made Good". This is a misnomer in that "courses" are directions steered or intended to be steered with respect to a reference meridian. "Track Made Good" is preferred over the use of "Course Made Good".

6. Where other information is presented using SI units, the respective abbreviations should be used.