Revoked by SN.1/Circ.243/Rev.1
Circular letter
SN/Circ.243
GUIDELINES FOR THE PRESENTATION OF NAVIGATION-RELATED SYMBOLS, TERMS AND
ABBREVIATIONS
(adopted on 7 December 2004)
1. The Sub-Committee on Safety of Navigation
(NAV), at its fiftieth session (5 to 9 July 2004), agreed on Guidelines for the
Presentation of Navigation-Related Symbols, given in Annex 1, and Terms and
Abbreviations, given in Annex 2, also agreed that they should be used for the
display of navigation-related information on all shipborne navigational
equipment and systems in consistent and uniform manner.
2. The Maritime Safety Committee, at its
seventy-ninth session (1 to 10 December 2004), concurred with the
Sub-Committee's views, approved the annexed Guidelines and encouraged their use
for all shipborne navigational systems and equipment.
3. Member Governments are invited to bring the
annexed Guidelines to the attention of all concerned.
Annex 1.
GUIDELINES FOR THE PRESENTATION OF NAVIGATION-RELATED SYMBOLS
1.
Purpose
The purpose of
these annexed Guidelines is to provide guidance on the appropriate use of
navigation-related symbols to achieve a harmonized and consistent presentation.
2.
Scope
The use of these
Guidelines will insure that the symbols used for the display of
navigation-related information on aft shipborne navigational systems and
equipment are presented in a consistent and uniform manner.
3.
Application
These Guidelines
apply to all shipborne navigational systems and equipment. The symbols listed
in the Appendix should be used for the display of navigation-related
information to promote consistency in the symbol presentation on navigational
equipment.
The
symbols listed in the Appendix should replace symbols which are currently
contained in existing performance standards. Where a standard symbol is not
available, another symbol may be used, but this symbol should not conflict with
the symbols listed in the Appendix.
Appendix .
NAVIGATION-RELATED SYMBOLS
Table 1:
Own Ship Symbols
|
Topic |
Symbol |
Description |
|
|
Own ship |
|
Double circle,
located at own ship's reference position. Use of this symbol is optional, if
own ship position is shown by the combination of Heading Line and Beam Line |
|
|
Own Ship True
scale outline |
|
True scale
outline located relative to own ship's reference position, oriented along own
ship's heading. Used on small ranges/large scales |
|
|
Own Ship Radar
Antenna Position |
|
Cross, located
on a true scale out-line of the ship at the physical location of the radar antenna
that is the current source of displayed radar video |
|
|
Own Ship Heading
line |
|
Solid line
thinner than the speed vector line style, drawn to the bearing ring or of
fixed length, if the bearing ring is not displayed. Origin is at own ship's
reference point |
|
|
Own Ship Beam
line |
|
Solid line of
fixed length; optionally length variable by operator. Midpoint at own ship's
reference point |
|
|
Own Ship Speed
vector |
|
Dashed line —
short dashes with spaces approximately twice the line width of heading line.
Time increments between the origin and endpoint may optionally be marked
along the vector using short intersecting lines. To indicate
Water/Ground stabilization optionally one arrowhead for water stabilization
and two arrowheads for ground stabilization may be added |
|
|
Own Ship Path
prediction |
|
A curved vector
may be provided as a path predictor |
|
|
Own Ship Past
Track |
|
Thick line for
primary source. Thin line for secondary source. Optional time marks are
allowed |
|
Table 2:
Tracked Radar Target Symbols
|
Topic |
Symbol |
Description |
|
Tracked Target
including Dangerous Target |
|
Solid filled or
unfilled circle located at target position. The course and speed vector
should be displayed as dashed line, with short dashes with spaces
approximately twice the line width. Optionally, time
increments, may be marked along the vector. For a "Dangerous
Target", bold, red (on colour display) solid circle with course and
speed vector, flashing until acknowledged |
|
Target in
Acquisition State |
|
Circle segments
in the acquired target state. For automatic acquisition, bold circle
segments, flashing and red (on colour display) until acknowledged |
|
Lost Target |
|
Bold lines
across the circle, flashing until acknowledged |
|
Selected Target |
|
A square
indicated by its corners centered around the target symbol |
|
Target Past
Positions |
|
Dots, equally
spaced by time |
|
Tracked
Reference Target |
|
Large R adjacent
to designated tracked target. Multiple reference targets should be marked as
Rl, R2, R3, etc. |
Table 3:
AIS Target Symbols
|
Topic |
Symbol |
Description |
|
AIS Target
(sleeping) |
|
An isosceles,
acute-angled triangle should be used. The triangle should be oriented by
heading, or COG if heading missing. The reported position should be located
at centre and half the height of the triangle. The symbol of the sleeping
target should be smaller than that of the activated target |
|
Activated AIS
Target Including Dangerous Target |
|
An isosceles,
acute-angled triangle should be used. The triangle should be oriented by
heading, or COG if heading missing. The reported position should be located
at centre and half the height of the triangle. The COG/SOG vector should be
displayed as a dashed line with short dashes with spaces approximately twice
the line width. Optionally, time increments may be marked along the vector.
The heading should be displayed as a solid line thinner than speed vector
line style, length twice of the length of the triangle symbol. Origin of the
heading line is the apex of the triangle. The turn should be indicated by a
flag of fixed length added to the heading line. A path predictor
may be provided as curved vector. For a "Dangerous AIS Target",
bold, red (on colour display) solid triangle with course and speed vector,
flashing until acknowledged |
|
AIS Target -
True Scale Outline |
|
A true scale outline
may be added to the triangle symbol. It should be: Located relative to
reported position and according to reported position offsets, beam and
length. Oriented along target's heading. Used on low ranges/large scales |
|
Selected target |
|
A square indicated
by its corners should be drawn around the activated target symbol |
|
Lost target |
|
Triangle with
bold solid cross. The triangle should be oriented per last known value. The
cross should have a fixed orientation. The symbol should flash until
acknowledged. The target
should be displayed without vector, heading and rate of turn indication |
|
Target Past
Positions |
|
Dots, equally
spaced by time |
|
Topic |
Symbol |
Description |
|
AIS Based A to N
Real Position of Charted Object |
|
Diamond with crosshair
centered at reported position. (Shown with chart symbol. Chart symbol not
required for radar.) |
|
AIS Based A to N
Virtual position |
|
Diamond with
crosshair centered at reported position |
|
Monitored Route |
|
Dashed bold
line, waypoints (WPT) as circles |
|
Planned or
Alternate Route |
|
Dotted line, WPT
as circles |
|
Trial Manoeuvre |
|
Large T on
screen |
|
Simulation Mode |
|
Large S on
screen |
|
Cursor |
|
Crosshair (two
alternatives, one with open centre) |
|
Range Rings |
|
Solid circles |
|
Variable Range
Markers (VRM) |
|
Circle.
Additional VRM should be distinguishable from the primary VRM |
|
Electronic
Bearing Lines (EBL) |
|
Dashed line.
Additional EBL should be distinguishable from the primary EBL |
|
Acquisition
Activation Area |
|
Solid line
boundary for an area |
|
Event Mark |
|
Rectangle with
diagonal line, clarified by added text (e.g. "MOB" for man
overboard cases) |
Annex 2.
GUIDELINES FOR THE PRESENTATION OF NAVIGATION-DELATED
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
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.
Where
a standard term and abbreviation is not available, an-other 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.
Unless
otherwise specified, standard terms should be shown in lower case while
abbreviations should be presented using up-per case.
LIST
OF STANDARD TERMS AND ABBREVIATIONS
|
Term |
Abbreviation |
|
Acknowledge |
ACК |
|
Acquire,
Acquisition |
ACQ |
|
Acquisition Zone |
AZ |
|
Adjust,
Adjustment |
ADJ |
|
Aft |
AFT |
|
Alarm |
ALARM |
|
Altitude |
ALT |
|
Amplitude
Modulation |
AM |
|
Anchor Watch |
ANCH |
|
Antenna |
ANT |
|
Anti Clutter
Rain |
RAIN |
|
Anti Clutter Sea |
SEA |
|
April |
APR |
|
Audible |
AUD |
|
August |
AUG |
|
Automatic |
AUTO |
|
Term |
Abbreviation |
|
Automatic
Frequency Control |
AFC |
|
Automatic Gain
Control |
AGС |
|
Automatic
Identification System |
AIS |
|
Auxiliary
System/Function |
AUX |
|
Available |
AVAIL |
|
Background |
BKGND |
|
Bearing |
BRG |
|
Bearing Waypoint
To Waypoint |
BWW |
|
Brilliance |
BRILL |
|
Built in Test
Equipment |
BITE |
|
Calibrate |
CAL |
|
Cancel |
CNCL |
|
Carried (e.g.
carried EBL origin) |
С |
|
Centre |
CENT |
|
Change |
CHG |
|
Circular
Polarised |
CP |
|
Clear |
CLR |
|
Closest Point of
Approach |
CPA |
|
Consistent
Common Reference Point |
CCRP |
|
Consistent
Common Reference System |
CCRS |
|
Contrast |
CONT |
|
Correction |
CORR |
|
Course |
CRS |
|
Course Over the
Ground |
COG |
|
Course Through
the Water |
CTW |
|
Course To Steer |
CTS |
|
Course Up |
СUP(2) |
|
Cross Track
Distance |
XTD |
|
Cursor |
CURS |
|
Dangerous Goods |
DG |
|
Date |
DATE |
|
Day/Night |
DAY/NT |
|
Dead Reckoning,
Dead Reckoned Position |
DR |
|
December |
DEC |
|
Term |
Abbreviation |
|
Decrease |
DECR |
|
Delay |
DELAY |
|
Delete |
DEL |
|
Departure |
DEP |
|
Depth |
DPTH |
|
Destination |
DEST |
|
Deviation |
DEV |
|
Differential
Galilleo |
DGAL(2) |
|
Differential
GLONASS |
DGLONASS(2) |
|
Differential
GNSS |
DGNSS(2) |
|
Differential GPS |
DGPS(2) |
|
Digital
Selective Calling |
DSC |
|
Display |
DISP |
|
Distance |
DIST |
|
Distance Root
Mean Square |
DRMS(2) |
|
Distance To Go |
DTG |
|
Drift |
DRIFT |
|
Dropped (e.g.
dropped EBL origin) |
D |
|
East |
E |
|
Electronic
Bearing Line |
EBL |
|
Electronic Chart
Display and Information System |
ECDIS |
|
Electronic
Navigational Chart |
ENC |
|
Electronic
Position Fixing System |
EPFS |
|
Electronic Range
and Bearing Line |
ERBL |
|
Enhance |
ENH |
|
Enter |
ENT |
|
Equipment |
EQUIP |
|
Error |
ERR |
|
Estimated
Position |
EP |
|
Estimated Time
of Arrival |
ETA |
|
Estimated Time
of Departure |
ETD |
|
Event |
EVENT |
|
Exclusion Zone |
EZ |
|
External |
EXT |
|
February |
FEB |
|
Fishing Vessel |
FISH |
|
Term |
Abbreviation |
|
Fix |
FIX |
|
Forward |
FWD |
|
Frequency |
FREQ |
|
Frequency
Modulation |
FM |
|
Full |
FULL |
|
Gain |
GAIN |
|
Galilleo |
GAL |
|
Geometric
Dilution Of Precision |
GDOP |
|
Global Maritime
Distress and Safety System |
GMDSS |
|
Global
Navigation Satellite System |
GNSS |
|
Global Orbiting
Navigation Satellite System |
GLONASS |
|
Global
Positioning System |
GPS |
|
Great Circle |
GC |
|
Grid |
GRID |
|
Ground |
GND |
|
Group Repetition
Interval |
GRI |
|
Guard Zone |
GZ |
|
Gyro |
GYRO |
|
Harmful
Substances (applies to AIS) |
HS |
|
Head Up |
H UP(2) |
|
Heading |
HDG |
|
Heading Control
System |
HCS |
|
Heading Line |
HL |
|
High Frequency |
HF |
|
High Speed Craft
(applies to AIS) |
HSC |
|
Horizontal
Dilution Of Precision |
HDOP |
|
Identification |
ID |
|
In |
IN |
|
Increase |
INCR |
|
Indication |
IND |
|
Information |
INFO |
|
Infrared |
INF RED |
|
Initialisation |
INIT |
|
Input |
INP |
|
Term |
Abbreviation |
|
Input/Output |
I/O |
|
Integrated Radio
Communication System |
IRCS |
|
Interference
Rejection |
IR |
|
Interswitch |
ISW |
|
Interval |
INT |
|
January |
JAN |
|
July |
JUL |
|
June |
JUN |
|
Latitude |
LAT |
|
Limit |
LIM |
|
Line Of Position |
LOP |
|
Log |
LOG |
|
Long Pulse |
LP |
|
Long Range |
LR |
|
Longitude |
LON |
|
Loran |
LORAN |
|
Lost Target |
LOST TGT |
|
Low Frequency |
LF |
|
Magnetic |
MAG |
|
Manoeuvre |
MVR |
|
Manual |
MAN |
|
Map(s) |
MAP |
|
March |
MAR |
|
Maritime Mobile
Services Identity number |
MMSI |
|
Maritime
Pollutant (applies to AIS) |
MP |
|
Maritime Safety
Information |
MSI |
|
Marker |
MKR |
|
Master |
MSTR |
|
Maximum |
MAX |
|
May |
MAY |
|
Medium Frequency |
MF |
|
Medium Pulse |
MP |
|
Menu |
MENU |
|
Minimum |
MIN |
|
Missing |
MISSING |
|
Mute |
MUTE |
|
Term |
Abbreviation |
|
Navigation |
NAV |
|
Normal |
NORM |
|
North |
N |
|
North Up |
N UP(2) |
|
November |
NOV |
|
October |
OCT |
|
Off |
OFF |
|
Officer On Watch |
OOW |
|
Offset |
OFFSET |
|
On |
ON |
|
Out/Output |
OUT |
|
Own Ship |
OS |
|
Panel
Illumination |
PANEL |
|
Parallel Index
Line |
PI |
|
Passenger Vessel
(applies to AIS) |
PASSV |
|
Performance
Monitor |
MON |
|
Permanent |
PERM |
|
Person Overboard |
РОВ |
|
Personal
Identification Number |
PIN |
|
Pilot Vessel
(applies to AIS) |
PILOT |
|
Port/Portside |
PORT |
|
Position |
POSN |
|
Positional
Dilution Of Precision |
PDOP |
|
Power |
PWR |
|
Predicted |
PRED |
|
Predicted Area of
Danger |
PAD |
|
Predicted Point
of Collision |
PPC |
|
Pulse Length |
PL |
|
Pulse Modulation |
PM |
|
Pulse Repetition
Frequency |
PRF |
|
Pulse Repetition
Rate |
PRR |
|
Pulses Per
Revolution |
PPR |
|
Racon |
RACON |
|
Radar |
RADAR |
|
Radius |
RAD |
|
Rain |
RAIN |
|
Term |
Abbreviation |
|
Range |
RNG |