GEN 2.2  ABBREVIATIONS USED IN AIS PUBLICATIONS

*Abbreviations marked with an asterisk (*) are either different from or are not contained in ICAO Doc 8400

A - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
..........RRight (preceded by runway designation number to identify a parallel runway)
R - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
...LLeft (preceded by runway designation number to identify a parallel runway)
L - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
AAmber
A/AAir to air
A/GAir-to-ground
AAAAmended meteorological message
AADAssigned altitude deviation
AAIMAircraft autonomous integrity monitoring
AALAbove aerodrome level
AARAir to air refuelling
ABIAdvance boundary information
ABMAbeam
ABNAerodrome beacon
ABTAbout
ABVAbove
ACAltocumulus
ACARSAircraft communication addressing and reporting system
ACASAirborne collision avoidance system
ACCArea control centre or area control
ACCIDNotification of an aircraft accident
ACFTAircraft
ACKAcknowledge
ACLAltimeter check location
ACNAircraft classification number
ACPAcceptance (message type designator)
ACPTAccept or accepted
ACTActive or activated or activity
ADAerodrome
ADAAdvisory area
ADCAerodrome chart
ADDNAddition or additional
ADFAutomatic direction-finding equipment
ADIZAir defence identification zone
ADJAdjacent
ADOAerodrome office
ADRAdvisory route
ADSAutomatic dependent surveillance
ADSUAutomatic dependent surveillance unit
ADVSAdvisory service
ADZAdvise
AESAircraft earth station
AFILFlight plan filed in the air
AFISAerodrome flight information service
AFMYes or affirm or affirmative or that is correct
AFRS*Aerodrome fire and rescue services
AFSAeronautical fixed service
AFTAfter. . . . . . . . (time or place)
AFTNAeronautical fixed telecommunication network
AGAAerodromes, air routes and ground aids
AGLAbove ground level
AGNAgain
AICAeronautical information circular
AIDCAir traffic services interfacility data communications
AIMAeronautical information management
AIPAeronautical information publication
AIRACAeronautical information regulation and control
AIREPAir-report
AIRMETInformation concerning en-route weather phenomena which may affect the safety of low-level aircraft operations
AISAeronautical information services
ALAAlighting area
ALERFAAlert phase
ALRAlerting (message type designator)
ALRSAlerting service
ALSApproach lighting system
ALTAltitude
ALTNAlternate or alternating (light alternates in colour)
ALTNAlternate (aerodrome)
AMAArea minimum altitude
AMDAmend or amended
AMDTAmendment (AIP Amendment)
AMSAeronautical mobile service
AMSLAbove mean sea level
AMSSAeronautical mobile satellite service
ANCAeronautical chart - 1:500 000 (followed by name/title)
ANCSAeronautical navigation chart - small scale
ANSAnswer
ANZUK*Australia, New Zealand and United Kingdom
AOAirport operator
AOCAerodrome obstacle chart (followed by type and name/title)
APAirport
APAPIAbbreviated precision approach path indicator
APCHApproach
APDCAircraft parking/docking chart
APNApron
APPApproach control office or approach control or approach control service
APRApril
APRXApproximate or approximately
APSGAfter passing
APUAuxiliary power unit
APVApproach procedure with vertical guidance
ARCArea chart
ARFORArea forecast (in aeronautical meteorological code)
ARNGArrange
AROAir traffic services reporting office
ARPAerodrome reference point
ARPAir-report (message type designator)
ARQAutomatic error correction
ARRArrival (message type designator)
ARSSpecial air-report (message type designator)
ARSTArresting [specify (part of) aircraft arresting equipment]
ASAltostratus
ASAPAs soon as possible
ASCAscend to or ascending to
ASDAAccelerate-stop distance available
ASEAltimetry system error
ASO*Aeroshell oil
ASPHAsphalt
ASTO*Aeroshell turbine oil
ATAt (followed by time at which weather change is forecast to occur)
AT-VASISAbbreviated T visual approach slope indicator system
ATAActual time of arrival
ATCAir traffic control (in general)
ATDActual time of departure
ATFMAir traffic flow management
ATISAutomatic terminal information service
ATMAir traffic management
ATNAeronautical telecommunication network
ATPAt time or place
ATSAir traffic services
ATTNAttention
ATZAerodrome traffic zone
AUGAugust
AUTHAuthorized
AUTOAutomatic
AUWAll up weight
AUXAuxiliary
AVBLAvailable or availability
AVGAverage
AVGASAviation gasoline
AWOSAutomated Weather Observation System
AWTAAdvise at what time able
AWYAirway
AZMAzimuth
B - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
BBlue
BABraking action
BASECloud base
BCFGFog patches
BCNBeacon (aeronautical ground light)
BCSTBroadcast
BDRYBoundary
BECMGBecoming
BFRBefore
BKNBroken
BLDGBuilding
BLOBelow clouds
BLWBelow. . . . . . . .
BOMBBombing
BRMist
BRFShort (used to indicate the type of approach desired or required)
BRGBearing
BRKGBraking
BSCommercial broadcasting station
BTLBetween layers
BTNBetween
BUFRBinary universal form for the representation of meteorological data
C - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
CCentre (runway identification)
CDegrees Celsius (Centigrade)
CACourse to an altitude
CAACivil Aviation Authority or Civil Aviation Administration
CAAM* Civil Aviation Authority of Malaysia
CAAS*Civil Aviation Authority of Singapore
CATCategory
CATClear air turbulence
CAVOKVisibility, cloud and present weather better than prescribed values or conditions
CBCumulonimbus
CCCirrocumulus
CCA(or CCB, CCC .. etc.,in sequence) Corrected meteorological message (message type designator)
CCOContinuous climb operations
CDCandela
CDNCoordination (message type designator)
CDOContinuous descent operations
CDRContinuous route
CFChange frequency to...
CFMConfirm or I confirm
CGLCircling guidance light(s)
CHChannel
CHEMChemical
CHGModification (message type designator)
CICirrus
CIDINCommon ICAO data interchange network
CIVCivil
CKCheck
CLCentre line
CLAClear type of ice formation
CLBRCalibration
CLDCloud
CLGCalling
CLIMB-OUTClimb-out area
CLRClear(s) or cleared to. . . . . . . . or clearance
CLRDRunway(s) cleared
CLSDClose or closed or closing
CMCentimetre
CMBClimb to or climbing to
CMPLCompletion or completed or complete
CNLCancel or cancelled
CNLFlight plan cancellation (message type designator)
CNSCommunications, navigation and surveillance
COMCommunications
CONCConcrete
CONDCondition
CONSContinuous
CONSTConstruction or constructed
CONTContinue(s) or continued
COORDCoordinates
COPChange-over point
CORCorrect or correction or corrected (message type designator)
COTAt the coast
COVCover or covered or covering
CPDLCController-pilot data link communications
CPLCurrent flight plan (message type designator)
CRCCyclic redundancy check
CRMCollision risk model
CRPCompulsory reporting point
CRZCruise
CSCall sign (used to request a callsign)
CSCirrostratus
CTAControl area
CTAMClimb to and maintain
CTCContact
CTLControl
CTNCaution
CTRControl zone
CUCumulus
CUFCumuliform
CUSTCustoms
CVRCockpit voice recorder
CWContinuous wave
CWYClearway
D - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
D-ATISData link automatic terminal information service
D-VOLMETData link VOLMET
D. . . . .Danger area (followed by identification)
DADecision altitude
DCDDouble channel duplex
DCKGDocking
DCPDatum crossing point
DCPCDirect controller-pilot communications
DCSDouble channel simplex
DCTDirect (in relation to flight plan clearances and type of approach)
DEFrom
DECDecember
DEGDegrees
DEPDeparture (message type designator)
DEPODeposition
DESDescend to or descending to
DESTDestination
DETRESFADistress phase
DEVDeviation or deviating
DFDRDigital flight data recorder
DFTIDistance from touchdown indicator
DGCA*Director-General of Civil Aviation
DHDecision height
DIA*Diameter
DIFDiffuse
DISTDistance
DIVDivert or diverting
DLADelay (message type designator)
DLADelay or delayed
DLICData link initiation capability
DMEDistance measuring equipment
DNGDanger or dangerous
DOFDate of flight
DOMDomestic
DPDew point temperature
DPTDepth
DRDead reckoning
DRGDuring
DSDuststorm
DSBDouble sideband
DTAMDescend to and maintain
DTGDate-time group
DTHRDisplaced runway threshold
DTRTDeteriorate or deteriorating
DTWDual tandem wheels
DUDust
DUCDense upper cloud
DUPEThis a duplicate message
DURDuration
DVORDoppler VOR
DWDual wheels
DZDrizzle
E - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
EEast or eastern longitude
EATExpected approach time
EBEastbound
EDAElevation differential area
EDTOExtended diversion time operations
EEE#Error (to be used in AFS as a procedure signal)
EETEstimated elapsed time
EFCExpect further clearance
EGNOSEuropean geostationary navigation overlay service
EHFExtremely high frequency (30 000 to 300 000 MHz)
ELBAEmergency location beacon - aircraft
ELEVElevation
ELRExtra long range
ELTEmergency locator transmitter
EMEmission
EMBDEmbedded in a layer (to indicate cumulonimbus embedded in layers of other clouds)
EMERGEmergency
EN*English
ENDStop-end (related to RVR)
ENEEast north east
ENGEngine
ENRCEnroute chart
ENRTEn route
EOBTEstimated off-block time
EQPTEquipment
ESEEast-south-east
ESTEstimate or estimated or estimation (message type designator)
ETAEstimated time of arrival or estimating arrival
ETC*Et cetera
ETDEstimated time of departure or estimating departure
ETOEstimated time over significant point
EVEvery
EVSEnhanced vision system
EXCExcept
EXERExercises or exercising or to exercise
EXPExpect or expected or expecting
EXTDExtend or extending or Extended
F - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
FFixed
FACFacilities
FAFFinal approach fix
FALFacilitation of international air transport
FAPFinal approach point
FATOFinal approach and take-off area
FAXFacsimile transmission
FBLLight (used to indicate the intensity of weather phenomena, interference or static reports
FCFunnel cloud (tornado or water spout)
FCSTForecast
FCTFriction coefficient
FDPSFlight data processing system
FEBFebruary
FEWFew
FGFog
FICFlight information centre
FIRFlight information region
FISFlight information service
FISAAutomated flight information service
FLFlight level
FLDField
FLGFlashing
FLRFlares
FLTFlight
FLTCKFlight check
FLUCFluctuating or fluctuation or fluctuated
FLWFollow(s) or following
FLYFly or flying
FMFrom
FMSFlight management system
FMUFlow management unit
FNAFinal approach
FPAPFlight path alignment point
FPLFlight plan
FPMFeet per minute
FPRFlight plan route
FRFuel remaining
FREQFrequency
FRIFriday
FRNGFiring
FRONTFront (relating to weather)
FRQFrequent
FSLFull stop landing
FSSFlight service station
FSTFirst
FTFeet (dimensional unit)
FTPFictitious threshold point
FUSmoke
FZFreezing
FZDZFreezing drizzle
FZFGFreezing fog
FZRAFreezing rain
G - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
GGreen
G/AGround-to-air
G/A/GGround-to-air and air-to-ground
GAGo ahead, resume sending (to be used in AFS as a procedure signal)
GAGeneral aviation
GAGANGPS and geostationary earth orbit augmented navigation
GAINAirspeed or headwind gain
GAMETArea forecast for low-level flights
GARPGBAS azimuth reference point
GBASGround-based augmentation system
GCAGround controlled approach system or ground controlled approach
GENGeneral
GEOGeographic or true
GLDGlider
GLONASSGlobal orbiting navigation satellite system
GMCGround movement chart
GNDGround
GNDCKGround check
GNSSGlobal navigation satellite system
GOVGovernment
GPGlide path
GPO*General Post Office
GPSGlobal positioning system
GPUGround power unit
GPWSGround proximity warning system
GRHail
GRASGround-based regional augmentation system
GRASSGrass landing area
GRIBProcessed meteorological data in the form of grid point values (in aeronautical meteorological code)
GRVLGravel
GSGround speed
GUNDGeoid undulation
H - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
HHigh pressure area or centre of high pressure
H+*Hour plus. . . . . . . . minutes past the hour
H...Significant wave height (followed by figures in METAR/SPECI)
H24Continuous day and night service
H24Continuous day and night service
HAPIHelicopter approach path indicator
HBNHazard beacon
HDFHigh frequency direction-finding station
HDGHeading
HELHelicopter
HEL - H*Heavy helicopter (radius of action in excess of 100 NM and capacity for evacuating more than 5 persons)
HEL - L*Light helicopter (radius of action of 50 NM and capacity of evacuating one person)
HEL- M*Medium helicopter (radius of action of 50 to 100 NM and capacity for evacuating 2 - 5 persons)
HFHigh frequency (3 000 to 30 000 KHz)
HGTHeight or height above
HJSunrise to sunset
HL*Height loss
HLDGHolding
HLPHeliport
HLSHelicopter landing site
HMHolding/racetrack to a manual termination
HMAS*Her Majesty's Australian Service
HMS*Her Majesty's Service
HNSunset to sunrise
HOService available to meet operational requirements
HOLHoliday
HOSPHospital aircraft
HPAHectopascal
HQ*Headquarters
HRHours
HSService available during hours of scheduled operations
HUDHead-up display
HUMHumanitarian
HURCNHurricane
HVDFHigh and very high frequency direction- finding stations (at the same location)
HVYHeavy
HXNo specific working hours
HYRHigher
HZHaze
HZHertz (cycle per second)
I - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
IACInstrument approach chart
IAFInitial approach fix
IAOIn and out of clouds
IAPInstrument approach procedure
IARIntersection of air routes
IASIndicated air speed
IBNIdentification beacon
ICAOInternational Civil Aviation Organization
ICEIcing
IDIdentifier or identity
IDENTIdentification
IFIntermediate approach fix
IFFIdentification friend/foe
IFRInstrument flight rules
IGAInternational general aviation
ILSInstrument landing system
IMInner marker
IMCInstrument meteorological conditions
IMGImmigration
IMPRImprove or improving
IMTImmediate or immediately
INAInitial approach
INBDInbound
INCIn cloud
INCERFAUncertainty phase
INCORPIncorporated
INFOInformation
INOPInoperative
INPIf not possible
INPRIn progress
INSInertial navigation system
INSTLInstall or Installed or Installation
INSTRInstrument
INTIntersection
INTER*Intermittent
INTLInternational
INTRGInterrogator
INTRPInterrupt or interruption or interrupted
INTSFIntensify or intensifying
INTSTIntensity
IRIce on runway
ISAInternational standard atmosphere
ISBIndependent sideband
ISOLIsolated
J - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
JANJanuary
JATCC*Joint ATC Centre
JTSTJet stream
JULJuly
JUNJune
K - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
KGKilograms
KHZKilohertz
KMKilometres
KMHKilometres per hour
KPAKilopascal
KTKnots
KWKilowatts
. - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
LLeft (runway identification)
LLocator (see LM, LO)
LLow pressure area or the centre of low Pressure
LLitre
LAMLogical acknowledgement (message type designator)
LANInland
LATLatitude
LDALanding distance available
LDAHLanding distance available, helicopter
LDGLanding
LDILanding direction indicator
LENLength
LFLow frequency (30 to 300 KHz)
LGTLight or lighting
LGTDLighted
LIHLight intensity high
LILLight intensity low
LIMLight intensity medium
LMLocator, middle
LMTLocal mean time
LNGLong (used to indicate the type of approach desired or required)
LOLocator, outer
LOCLocalizer
LONGLongitude
LORANLORAN (long range air navigation system)
LOSSAirspeed or headwind loss
LRThe last message received by me was....
LRGLong range
LSThe last message sent by me was...or Last message was...(to be used in AFS as a procedure signal)
LSQLine squall
LTALower control area
LTDLimited
LTPLanding threshold point
LVLight and variable (relating to wind)
LVELeave or leaving
LVLLevel
LYRLayer or layered
M - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
MMach Number (followed by figures)
MMetres (preceded by figures)
MAAMaximum authorized altitude
MAGMagnetic
MAINTMaintenance
MAPAeronautical maps and charts
MAPTMissed approach point
MARAt sea
MARMarch
MAS*Malaysia Airline System
MATFMissed approach turning fix
MATZMilitary aerodrome traffic zone
MAXMaximum
MAYMay
MBSTMicroburst
MCAMinimum crossing altitude
MCTRMilitary control zone
MCWModulated continuous wave
MDAMinimum descent altitude
MDFMedium frequency direction-finding station
MDHMinimum descent height
MEAMinimum en-route altitude
MEDEVACMedical evacuation flight
MEHTMinimum eye height over threshold (for visual approach slope indicator systems)
METMeteorological or meteorology
MET REPORTLocal routine meteorological report
METARAviation routine weather report (in aeronautical meteorology code)
MFMedium frequency [300 to 3 000 kHz]
MHAMinimum holding altitude
MHDFMedium and high frequency direction finding stations (at the same location)
MHVDFMedium, high and very high frequency direction-finding stations (at the same location)
MHZMegahertz
MIDMid-point (related to RVR)
MIFGShallow fog
MILMilitary
MINMinutes
MINDEFMinistry of Defence
MISMissing
MKRMarker radio beacon
MLSMicrowave landing system
MMMiddle marker
MNMMinimum
MNPSMinimum navigation performance specifications
MNTMonitor or monitoring or monitored
MNTNMaintain
MOAMilitary operating area
MOCMinimum obstacle clearance (required)
MODModerate (used to indicate the intensity of weather phenomena, interference or static report, e.g. MOD RA = moderate rain)
MONAbove mountain
MONMonday
MOPSMinimum operational performance standards
MOVMove or moving or movement
MPH*Statute miles per hour
MPSMetres per second
MRAMinimum reception altitude
MRGMedium range
MRPATS/MET reporting point
MSMinus
MSAMinimum sector altitude
MSASMulti-functional transport satellite (MTSAT) satellite-based augmentation system
MSAWMinimum safe altitude warning
MSGMessage
MSLMean sea level
MSRMessage has been misrouted
MSSRMonopulse secondary surveillance radar
MTMountain
MTOMMaximum take-off mass
MTUMetric units
MTWMountain waves
MVDFMedium and very high frequency direction finding stations (at the same location)
MWOMeteorological watch office
MXMixed type of ice formation (white and clear)
N - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
NNorth or northern latitude
NASCNational AIS system centre
NATNorth Atlantic
NAVNavigation
NAVAIDNavigation aid
NBNorthbound
NBFRNot before
NCNo change
NCDNo cloud detected
NDBNon-directional radio beacon
NDVNo directional variations available
NENorth-east
NEBNorth-eastbound
NEGNo or negative or permission not granted or that is not correct
NGTNight
NILNone or I have nothing to send to you
NMNautical miles
NMLNormal
NNNo name, unnamed
NNENorth north east
NNWNorth north west
NOFInternational NOTAM Office
NONSTDNon-standard
NOSIGNo significant change (used in trend-type landing forecasts)
NOTAMA notice distributed by means of telecommunication containing information concerning the establishment, condition or change in any aeronautical facility, service, procedure or hazard, the timely knowledge of which is essential to personnel concerned with flight operations
NOTAMCCancelling NOTAM
NOTAMNNew NOTAM
NOTAMRReplacing NOTAM
NOVNovember
NOZNormal operating zone
NRNumber
NRHNo reply heard
NSNimbostratus
NSCNil significant cloud
NSWNil significant weather
NTLNational
NTZNo transgression zone
NWNorth-west
NWBNorth-westbound
NXTNext
O - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
O/ROn request
OACOceanic area control centre
OASObstacle assessment surface
OBSObserve or observed or observation
OBSCObscure or obscured or obscuring
OBSTObstacle
OCAObstacle clearance altitude
OCAOceanic control area
OCCOcculting (light)
OCHObstacle clearance height
OCL*Obstacle clearance limit
OCNLOccasional or occasionally
OCSObstacle clearance surface
OCTOctober
OFZObstacle free zone
OGNOriginate
OHDOverhead
OKWe agree or it is correct
OLDIOn-line data interchange
OMOuter marker
OPAOpaque, white type of ice formation
OPCThe control indicated is operational control
OPMETOperational meteorological (information)
OPNOpen or opening or opened
OPROperator or operate or operative or operating or operational
OPSOperations
ORDOrder
OSVOcean station vessel
OTPOn top
OTSOrganized track system
OUBDOutbound
OVCOvercast
P - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
P. . . . . .Prohibited area (followed by identification)
P..........Maximum value of wind speed or runway visual range
PAPrecision approach
PALSPrecision approach lighting system (specify category)
PANSProcedures for air navigation services
PAPIPrecision approach path indicator
PARPrecision approach radar
PARA*Paragraph
PARLParallel
PATC...Precision approach terrain chart
PAXPassenger(s)
PBCPerformance-based communication
PBNPerformance-based navigation
PBSPerformance-based surveillance
PCDProceed or proceeding
PCLPilot-controlled lighting
PCNPavement classification number
PCTPer cent
PDCPre-departure clearance
PDGProcedure design gradient
PEIce pellets
PERPerformance
PERMPermanent
PIBPre-flight information bulletin
PJEParachute jumping exercise
PLIce pellets
PLAPractice low approach
PLVLPresent level
PNPrior notice required
PNRPoint of no return
PODust/sand whirls
POBPersons on board
POSSPossible
PPIPlan position indicator
PPRPrior permission required
PPSNPresent position
PRFGAerodrome partially covered by fog
PRIPrimary
PRKGParking
PROBProbability
PROCProcedure
PROPPropeller
PROVProvisional
PSPlus
PSGPassing
PSNPosition
PSPPierced steel plank
PSRPrimary surveillance radar
PSYSPressure system(s)
PTNProcedure turn
PTSPolar track structure
PWRPower
Q - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
QDLDo you intend to ask me for a series of bearings? or I intend to ask you for a series of bearings
QDMMagnetic heading (zero wind)
QDRMagnetic bearing
QFEAtmospheric pressure at aerodrome elevation (or at runway threshold)
QFUMagnetic orientation of runway
QGEWhat is my distance to your station or Your distance to my station is
QJHShall I run my test tape/a test sentence? Or run your test tape/a test sentence
QNHAltimeter sub-scale setting to obtain elevation when on the ground
QSPWill you relay to.... free of charge? Or I will relay to........ free of charge
QTAShall I cancel telegram number...? or Cancel telegram number.......
QTETrue bearing
QTFWill you give me the position of my station according to the bearings taken by the D/F stations which you control? or The position of your station according to the bearings taken by the D/F stations that I control was.....latitude.....longitude or other indication of position, class....at.......hours
QUADQuadrant
QUJWill you indicate the TRUE track to reach you? or The TRUE track to reach me in degrees at .....hours
. - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
RRed
RRight (runway identification)
R*Receive (acknowledgement of receipt) (to be used in AFS as a procedure signal)
R. . . . .Restricted area (followed by identification)
R.........Runway visual range
R.........Radial from VOR (followed by three figures)
RARain
RACRules of the air and Air Traffic Services
RAF*Royal Air Force
RAGRagged
RAGRunway arresting gear
RAIRunway alignment indicator
RAIMReceiver autonomous integrity monitoring
RASCRegional AIS system centre
RASSRemote altimeter setting source
RBRescue boat
RCAReach cruising altitude
RCCRescue coordination centre
RCFRadio communication failure (message type designator
RCHReach or reaching
RCLRunway centre line
RCLLRunway centre line light(s)
RCLRRecleared
RCPRequired communication performance
RDHReference datum height
RDLRadial
RDORadio
RDOACTRadioactive
RERecent (used to qualify weather phenomena e.g. RERA = recent rain
RECReceive or receiver
REDLRunway edge light(s)
REFReference to. . . .. . . or refer to. . . . . . .
REGRegistration
RENLRunway end light(s)
REPReport or reporting or reporting point
REQRequest or requested
RERTEReroute
RESARunway end safety area
RFConstant radius arc to a fix
RFC*Radio facility chart
RFFSRescue and fire fighting services
RGRange (lights)
RH*Rescue helicopter
RHCRight-hand circuit
RIFReclearance in flight
RIMERime (used in aerodrome warnings)
RLReport leaving
RLARelay to
RLCERequest level change en route
RLLSRunway lead-in lighting system
RLNARequest level not available
RMACRadar minimum altitude chart
RMAF*Royal Malaysian Air Force
RMKRemark
RNAVArea navigation
RNGRadio range
RNPRequired navigation performance
ROBEXRegional OPMET bulletin exchange (scheme)
ROCRate of climb
RODRate of descent
RONReceiving only
RPIRadar position indicator
RPLRepetitive flight plan
RPLCReplace or replaced
RPSRadar position symbol
RPTRepeat or I repeat
RQRequest
RQMNTSRequirements
RQPRequest flight plan (message type designator)
RQSRequest supplementary flight plan (message type designator)
RRReport reaching
RRA(or RRB, RRC... etc, in sequence) Delayed meteorological message
RSAF*Republic of Singapore Air Force
RSCRescue sub-centre
RSCDRunway surface condition
RSFC*Royal Selangor Flying Club
RSPRequired surveillance performance
RSPResponder beacon
RSREn-route surveillance radar
RTDDelayed (message type designator)
RTERoute
RTFRadiotelephone
RTGRadiotelegraph
RTHLRunway threshold light(s)
RTNReturn or returned or returning
RTODAHRejected take-off distance available, helicopter
RTSReturn to service
RTTRadio teletypewriter
RTZLRunway touchdown zone light(s)
RUTStandard regional route transmitting frequencies
RVRescue vessel
RVARadar vectoring area
RVRRunway visual range
RVSMReduced vertical separation minimum (300m (1000ft)) between FL290 and FL410
RWYRunway
S - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
SSouth or southern latitude
SASand
SALSSimple approach lighting system
SANSanitary
SARSearch and rescue
SARPSStandards and Recommended Practices (ICAO)
SATSaturday
SATCOMSatellite communication (used only when referring generally to both voice and data satellite communication or only data satellite communication)
SATO*Shell aircraft turbine oil
SATVOICESatellite voice communication
SBSouthbound
SBASSatellite-based augmentation system
SCStratocumulus
SCTScattered
SDBYStand by
SESouth-east
SEASea (used in connection with sea-surface temperature and state of the sea
SEBSouth-eastbound
SECSeconds
SECNSection
SECTSector
SELCALSelective calling system
SEPSeptember
SERService or servicing or served
SEVSevere (used e.g. to qualify icing and turbulence reports)
SFCSurface
SGSnow grains
SGLSignal
SHShower
SHFSuper high freguency (3 000 to 30 000 MHz)
SIA*Standard instrument approach
SIDStandard instrument departure
SIFSelective identification feature
SIGSignificant
SIGMETInformation concerning en-route weather and other phenomena in the atmosphere that may affect the safety of aircraft operations
SIMULSimultaneous or simultaneously
SIWLSingle isolated wheel load
SKEDSchedule or scheduled
SLPSpeed limiting point
SLWSlow
SMCSurface movement control
SMRSurface movement radar
SNSnow
SNOCLOAerodrome closed due to snow
SNOWTAMA special series NOTAM notifying the presence or removal of hazardous conditions due to snow, ice, slush or standing water associated with snow, slush and ice on the movement area, by means of a specific format
SOC*Start of climb
SPECIAviation selected special weather report (in aeronautical meteorological code)
SPECIALSpecial meteorological report (in abbreviated plain language)
SPLSupplementary flight plan (message type designator)
SPOCSAR point of contact
SPOTSpot wind
SQSquall
SQLSquall line
SRSunrise
SRASurveillance radar approach
SRESurveillance radar element of precision approach radar system
SRGShort range
SRRSearch and rescue region
SRYSecondary
SSSandstorm
SSSunset
SSBSingle sideband
SSESouth south east
SSRSecondary surveillance radar
SSTSupersonic transport
SSWSouth south west
STStratus
STAStraight in approach
STARStandard instrument arrival
STDStandard
STFStratiform
STNStation
STNRStationary
STOLShort take-off and landing
STSSTS
STWLStopway light(s)
SUBJSubject to
SUNSunday
SUPSupplement (AIP Supplement)
SUPPSRegional supplementary procedures
SVCService (message type only)
SVCBLServiceable
SWSouth-west
SWBSouth-westbound
SWYStopway
T - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
TTemperature
T-VASIST visual approach slope indicator system
TATransition altitude
TAATerminal arrival altitude
TACANUHF tactical air navigation aid
TAFAerodrome forecast
TAILTail wind
TAM*Technical acknowledge message
TARTerminal area surveillance radar
TASTrue airspeed
TAXTaxiing or taxi
TCTropical cyclone
TCACTropical cyclone advisory centre
TCUTowering cumulus
TDOTornado
TDZTouchdown zone
TECRTechnical reason
TELTelephone
TEMPOTemporary or temporarily
TFCTraffic
TGLTouch-and-go landing
TGSTaxiing guidance system
THRThreshold
THRUThrough
THUThursday
TIBATraffic information broadcast by aircraft
TILUntil
TIPUntil past. . . . . . . . (place)
TKOFTake-off
TLTill
TLOFTouchdown and lift-off area
TMATerminal control area
TNMinimum temperature
TNATurn altitude
TNHTurn height
TOTo. . . . . . . . (place)
TOCTop of climb
TOD*Time of despatch
TODATake-off distance available
TODAHTake-off distance available, helicopter
TOPCloud top
TOR*Time of receipt
TORATake-off run available
TOXToxic
TPTurning point
TRTrack
TRATemporary reserved airspace
TRANSTransmits or transmitter
TRENDTrend forecast
TRGTraining
TRLTransition level
TROPTropopause
TSThunderstorm
TTTeletypewriter
TUETuesday
TURBTurbulence
TVORTerminal VOR
TWRAerodrome control tower or aerodrome control
TWYTaxiway
TXMaximum temperature
TX...Maximum temperature (followed by figures in TAF)
TXLTaxilane
TXTText
TXT*Text (when the abbreviation is used to request a repetition, the question mark (IMI) precedes the abbreviation, e.g. IMI TXT) (to be used in AFS as a procedure signal)
TYPType of aircraft
TYPHTyphoon
U - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
UUpward
U/SUnserviceable
UAUnmanned aircraft
UABUntil advised by. . . . . . . .
UACUpper area control centre
UARUpper air route
UASUnmanned aircraft system
UDFUltra high frequency direction-finding station
UFNUntil further notice
UHDTUnable higher due traffic
UHFUltra high frequency (300 to 3 000 MHz)
UICUpper information centre
UIRUpper flight information region
ULMUltra light motorized aircraft
ULRUltra long range
UNAUnable
UNAPUnable to approve
UNLUnlimited
UNRELUnreliable
UPUnidentified precipitation
UTAUpper control area
UTCCo-ordinated Universal Time
V - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
VAVolcanic ash
VAACVolcanic ash advisory centre
VACVisual approach chart
VALIn valleys
VANRunway control van
VARMagnetic variation
VARVisual-aural radio range
VASISVisual approach slope indicator system
VCVicinity of the aerodrome
VCYVicinity
VDFVery high frequency direction-finding station
VERVertical
VFRVisual flight rules
VHFVery high frequency (30 to 300 MHz)
VIA*By way of
VIPVery important person
VISVisibility
VLFVery low frequency (3 to 30 KHz)
VLRVery long range
VMCVisual meteorological conditions
VNAV(to be pronounced "VEE-NAV) Vertical navigation
VOLVolume (followed by I, II...)
VOLMETMeteorological information for aircraft in flight
VORVHF omnidirectional radio range
VORTACVOR and TACAN combination
VOTVOR airborne equipment test facility
VPAVertical path angle
VRBVariable
VSABy visual reference to the ground
VSPVertical speed
VTOLVertical take-off and landing
VVVertical visibility
VVIP*Very very important person
W - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
WWest or western longitude
WWhite
WAASWide area augmentation system
WACWorld Aeronautical Chart - ICAO 1:1 000 000
WAFCWorld area forecast centre
WBWestbound
WBARWing bar lights
WDIWind direction indicator
WDSPRWidespread
WEDWednesday
WEFWith effect from or effective from
WGS-84World Geodetic System - 1984
WIWithin
WIDWidth
WIEWith immediate effect or effective immediately
WILCOWill comply
WINDWind
WIPWork in progress
WKNWeaken or weakening
WNWWest north west
WOWithout
WPTWay-point
WRNGWarning
WSWind shear
WSPDWind speed
WSWWest south west
WTWeight
WTSPTWaterspout
WWWWorldwide web
WXWeather
WXRWeather radar
X - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
XCross
XBARCrossbar (of approach lighting system)
XNGCrossing
XSAtmospherics
Y - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
YYellow
YCZYellow caution zone (runway lighting)
YESYes (affirmative)
YRYour
Z - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
ZCo-ordinated Universal Time (in meteorological messages)