USE OF ABBREVIATIONS IN WEATHER INFORMATION BROADCASTS BY NAVTEX

Summary

A range of standard abbreviations will be introduced to weather forecasts broadcast on the International NAVTEX (518 kHz) service, commencing on 1 November 2006.

Background

The volume of traffic on the international NAVTEX service has increased since its inception, and on occasions timeslots can overrun due to the length of messages needing to be broadcast.

The most efficient and effective method for reducing the length of meteorological messages is to utilise some form of abbreviations.  This, however, can only be achieved by using standard and strictly controlled abbreviations, which are common internationally.  The World Meteorological Organisation has undertaken the management of these abbreviations, which were ratified at the Second Session of the Joint WMO-IOC Technical Commission for Oceanography and Marine Meteorology, in September 2005.  The list of abbreviations is as follows:

COMMON ABBREVIATIONS FOR INTERNATIONAL NAVTEX SERVICE

All wind directions to be abbreviated as indicated below.

Terminology in full NAVTEX Abbreviations
North or NortherlyN
Northeast or NortheasterlyNE
East or EasterlyE
Southeast or SoutheasterlySE
South or SoutherlyS
Southwest or Southwesterly                                          SW                                                                        
West or WesterlyW
Northwest or NorthwesterlyNW

Terminology in full NAVTEX Abbreviations                                              
DecreasingDECR
IncreasingINCR
VariableVRB
BecomingBECMG
LocallyLOC
ModerateMOD
OccasionallyOCNL
ScatteredSCT
Temporarily/TemporaryTEMPO
IsolatedISOL
Frequent/FrequencyFRQ
ShowersSHWRS or SH
Cold FrontC-FRONT or CFNT
Warm FrontW-FRONT or WFNT
Occlusion FrontO-FRONT or OFNT
WeakeningWKN
BuildingBLDN
FillingFLN
DeepeningDPN
Intensifying/IntensifyINTSF
Improving/ImproveIMPR
StationarySTNR
Quasi-StationaryQSTNR
Moving/MoveMOV or MVG
VeeringVEER
BackingBACK
SlowlySLWY
QuicklyQCKY
RapidlyRPDY
KnotsKT
Km/hKMH
Nautical milesNM
MetresM
HectoPascalHPA
Meteo …MET
ForecastFCST
Further outlooksTEND
VisibilityVIS
SlightSLGT or SLT
QuadrantQUAD
PossiblePOSS
Probability/ProbablePROB
SignificantSIG
No changeNC
No significant change                                           NOSIG
FollowingFLW
NextNXT
HeavyHVY
SevereSEV or SVR
StrongSTRG
FromFM
ExpectedEXP
Latitude/LongitudeLAT/LONG

“Expected” and “Latitude/Longitude” should, when possible, be omitted in the messages.

Please click on the link for a printable version of the table navtex_abbreviations_table.pdfbmp
                                                                                           (download 24.3 KB)