GEN 2.2Skammstafanir notaðar í AIS-útgáfu Abbreviations Used in AIS Publications

* Ef skammstöfun er frábrugðin ICAO Doc 8400 eða er ekki tiltekin þar er hún stjörnumerkt.
Abbreviations marked with an asterisk are either different from or not contained in ICAO Doc 8400.

† Í talfjarskiptum eru skammstafanir og orðalag flutt sem talað orð.
When radiotelephony is used, the abbreviations and terms are transmitted as spoken words.

‡ Í talfjarskiptum eru skammstafanir og orðalag flutt sem einstakir bókstafir.
When radiotelephony is used, the abbreviations and terms are transmitted using the individual letters in non phonetic form.

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
AAlfa*
AAmber
AAmperes*
AAutotuned NAVAID*
A/AAir-to-air
A/GAir-to-ground
AAAll after...*
AALAbove aerodrome level
ABAll before...*
ABMAbeam
ABNAerodrome beacon
ABTAbout
ABVAbove
ACAdvisory Circular*
ACAlternate Current*
ACAltocumulus
ACC‡ Area control centre or area control
ACCIDNotification of an aircraft accident
ACFTAircraft
ACLAltimeter check location
ACPAcceptance (message type designator)
ACPTAccept or accepted
ACTActive or activated or activity
ADAerodrome
ADAAdvisory area
ADDNAddition or additional
ADF‡ Automatic direction-finding equipment
ADIZ† Air defence identification zone
ADJAdjacent
ADRAdvisory route
ADSAutomatic dependent surveillance
ADSThe address
ADS-BAutomatic Dependent Surveillance Broadcast
ADZAdvise
AFCArea forecast centre*
AFILFlight plan filed in the air
AFISAerodrome flight information service
AFSAeronautical fixed service
AFTAfter... (time or place)
AFTN‡ Aeronautical fixed telecommunication network
AGAAerodromes, air routes and ground aids
AGLAbove ground level
AGNAgain
AICAeronautical information circular
AIPAeronautical information publication
AIRACAeronautical information regulation and control
AIREP† Air-report
AISAeronautical information services
ALAAlighting area
ALERFA† Alert phase
ALRAlerting (message type designator)
ALSApproach lighting system
ALTAltitude
ALTNAlternate or alternating (light alternates in colour)
ALTNAlternate (aerodrome)
AMDAmend or amended
AMDTAmendment (AIP Amendment)
AMSAeronautical mobile service
AMSLAbove mean sea level
AOCAerodrome obstacle chart
APAirport
APCHApproach
APPApproach control office or approach control or approach control service
APRApril
APRXApproximate or approximately
AREnd of transmission*
ARFFAircraft Rescue and Fire Fighting
ARFORArea forecast * (in aeronautical meteorological code)
ARMETForecast upper wind and temperature at specified points* (in aeronautical meteorological code)
AROAir traffic services reporting office
ARPAerodrome reference point
ARPAir-report (message type designator)
ARQAutomatic error correction
ARRArrival (message type designator)
ARRArrive or arrival
ARSSpecial air-report (message type designator)
ARSTArresting (specify (part of) aircraft arresting equipment)
ASAltostratus
ASWait*
ASCAscent to or ascending to
ASDAAccelerate-stop distance available
ASPHAsphalt
ATA‡ Actual time of arrival
ATC‡ Air traffic control (in general)
ATD‡ Actual time of departure
ATIS† Automatic terminal information service
ATPAt... (time or place)
ATSAir traffic services
ATTNAttention
ATZAerodrome traffic zone
AUGAugust
AUWAll up weight
AUXAuxiliary
AVASISAbbreviated visual approach slope indicator system*
AVBLAvailable or availability
AVGAverage
AVGAS† Aviation gasoline
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
BBravo*
BABraking action
BASE† Cloud base
BCFGFog patches
BCNBeacon (aeronautical ground light)
BCSTBroadcast
BDRYBoundary
BKNBroken
BLDGBuilding
BLOBelow clouds
BLSNBlowing snow
BLWBelow...
BOMBBombing
BRMist
BRFShort (used to indicate the type of approach desired or required)
BRGBearing
BRKGBraking
BSCommercial broadcasting station
BTLBetween layers
BTNBetween
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
CDegrees Celsius (Centigrade)
CATCategory
CATClear air turbulence
CAVOK† (to be pronounced “KAV-OH-KAY”) Visibility, cloud and present weather better than prescribed values or conditions
CB‡ Cumulonimbus
CCCirrocumulus
CDCandela
CDNCo-ordination (message type designator)
CFMConfirm or I confirm
CHChannel
CH#This is a channel-continuity-check of transmission to permit comparison of your record of channel-sequence numbers of messages received on the channel (to be used in AFS as a procedure signal)
CHGModification (message type designator)
CICirrus
CITNear or over large towns
CIVCivil
CLCentre line
CLAClear type of ice formation
CLBRCalibration
CLDCloud
CLRClear or cleared to... or clearance
CLSDClose or closed or closing
CMCentimetre
CMPLCompletion or completed or complete
CNLCancel or cancelled
CNLFlight plan cancellation (message type designator)
CNSCommunications, navigation and surveillance
CNSContinuous*
COMCommunications
CONCConcrete
CONDCondition
CONSTConstruction or constructed
CONTContinue or continued
COPChange-over point
CORCorrect or corrected or correction
COTAt the coast
COVCover or covered or covering
CPGeneral call to two or more specified stations*
CPDLCController-pilot data link communications
CPLCurrent flight plan (message type designator)
CRZCruise
CSCall sign (used to request a call sign)
CSCirrostratus
CTAControl area
CTAMClimb to and maintain
CTCContact
CTLControl
CTNCaution
CTRControl zone
CUCumulus
CUFCumuliform
CUSTCustoms
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...Danger area (followed by identification)
DADecision altitude
DCDDouble channel duplex
DCKGDocking
DCSDouble channel simplex
DCTDirect (in relation to flight plan clearances and type of approach)
DECDecember
DEGDegrees
DENEBFog dispersal operations*
DEPDepart or departure
DEPDeparture (message type designator)
DESDescend to or descending to
DESTDestination
DETRESFA† Distress phase
DEVDeviation or deviating
DFTIDistance from touchdown indicator
DGPSDifferential global positioning system
DHDecision height
DIFDiffuse
DISTDistance
DIVDivert or Diverting
DLADelay (message type designator)
DLADelay or delayed
DME‡ Distance measuring equipment
DNGDanger or dangerous
DOMDomestic
DPDew point temperature
DPTDepth
DRDead reckoning
DRGDuring
DRSNLow drifting snow*
DSBDouble side-band
DTAMDescend to and maintain
DTGDate-time group
DTRTDeteriorate or deteriorating
DTWDual tandem wheels
DUCDense upper cloud
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
EEE#Error (to be used in AFS as a procedure signal)
EETEstimated elapsed time
EHFExtremely high frequency (30 000 to 300 000 MHz)
ELBA† Emergency location beacon - aircraft
ELEVElevation
ELRExtra long range
EMEmission
EMBDEmbedded in a layer (to indicate cumulonimbus embedded in layers of other clouds)
EMERGEmergency
ENEEast-north-east
ENGEngine
ENREn route
ENRTEn route*
EOBTEstimated off-block time
EQPTEquipment
ERHere... or herewith
ESEEast-south-east
ESTEstimate or estimated or estimation (message type designator)
ETA‡ Estimated time of arrival or estimating arrival
ETD‡ Estimated time of departure or estimating departure
ETOEstimated time over significant point
EVEvery
EXCExcept
EXERExercises or exercising or to exercise
EXPExpect or expected or expecting
EXTDExtend or extending
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
FDegrees Fahrenheit*
FACFacilities
FAFFinal approach fix
FALFacilitation of international air transport
FANSFuture Air Navigation Systems*
FAPFinal approach point
FATOFinal approach and take-off area
FAXFacsimile transmission
FBLLight (used to qualify icing, turbulence, interference, or static reports)
FCFunnel cloud
FCSTForecast
FEBFebruary
FGFog
FICFlight information centre
FIR‡ Flight 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
FNAFinal approach
FOTUnits of English system*
FPLFiled flight plan (message type designator)
FPMFeet per minute
FPRFlight plan route
FREQFrequency
FRIFriday
FRNGFiring
FRONT† Front (relating to weather)
FRQFrequent
FSFE*FANS services front end*
FSLFull stop landing
FSSFlight service station
FSTFirst
FTFeet (dimensional unit)
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
GGolf*
GGreen
GWind Gusts*
G/AGround-to-air
G/A/GGround-to-air and air-to-ground
GAGo ahead, resume sending
GCA‡ Ground controlled approach system or ground controlled approach
GENGeneral
GEOGeographic or true
GESGround earth station
GLDGlider
GMTGreenwich mean time*
GNDGround
GNDCKGround check
GNSS‡ Global nav. sat. system
GPGlide path
GP VHF‡ General purpose very high frequency*
GPS‡ Global positioning system
GRHail or soft hail*
GRADMinimum required Climb Gradient*
GRADUGradual or gradually*
GRASSGrass landing area
GRIDProcessed meteorological data in the form of grid point values* (in aeronautical meteorological code)
GRNGreen*
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
H24Continuous day and night service
HAPIHelicopter approach path indicator
HBNHazard beacon
HDFHigh frequency direction-finding station
HDGHeading
HELHelicopter
HF‡ High frequency (3 000 to 30 000 kHz)
HGTHeight or height above
HJSunrise to sunset
HLAHigh Level Airspace
HLDGHolding
HNSunset to sunrise
HOService available to meet operational requirements
HOLHoliday
HOSPHospital aircraft
HPAHectopascal
HRHours
HSService available during hours of scheduled operations
HURCNHurricane
HVDFHigh and very high frequency direction-finding stations (at the same location)
HXNo specific working hours
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
IAC...Instrument approach chart (followed by name/title)
IAFInitial approach fix
IAIPIntegrated Aeronautical Information Package*
IALInstrument approach and landing chart*
IAOIn and out of clouds
IARIntersection of air routes
IASIndicated air speed
IBNIdentification beacon
ICEIcing
IDIdentifier or identify
IDENT† Identification
IFIntermediate approach fix
IFFIdentification friend/foe
IFR‡ Instrument flight rules
IGAInternational general aviation
ILS‡ Instrument landing system
IMInner marker
IMC‡ Instrument meteorological conditions
IMGImmigration
IMIInterrogation sign (question mark)
IMPRImprove or improving
IMTImmediate or immediately
INAInitial approach
INBDInbound
INCIn cloud
INCERFAUncertainty phase
INFO† Information
INOPInoperative
INPIf not possible
INPRIN progress
INSInches (dimensional unit)*
INSInertial navigation system
INSTLInstall or installed or installation
INSTRInstrument
INTIntersection
INTERIntermittent*
INTLInternational
INTRGInterrogator
INTRPInterrupt or interruption or interrupted
INTSFIntensify or intensifying
INTSTIntensity
IRIce on runway
ISAInternational standard atmosphere
ISBIndependent side-band
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
JAGJet arresting gear*
JANJanuary
JMMake a series of dashes if I may transmit*
JMMake a series of dots to stop my transmission*
JRCCJoint Rescue Coordination Centre* Björgunarstjórnstöð sjófarenda og loftfara*
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
KInvitation to transmit*
KAStart-of-message signal in Morse telegraphy*
KGKilograms
KHZKilohertz
KIASKnots indicated airspeed
KMKilometres
KMHKilometres per hour
KPAKilopascal
KTKnots
KWKilowatts
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
LLeft (Runway identification) Locator (see LM, LO)
LAMLogical acknowledgement (message type designator)
LANInland
LATLatitude
LBPounds (weight)*
LCALocal or locally or location or located
LCNLoad classification number*
LDALanding distance available
LDAHLDA helicopter
LDGLanding
LDILanding direction indicator
LDINLead-In Light System*
LEFTLeft (direction of turn)*
LENLength
LFLow frequency (30 to 300 kHz)
LGTLight or lighting
LGTDLighted
LIHLight intensity high
LILLight intensity low
LIMLight intensity medium
LINELine (used in SIGMET)
LLZLocalizer*
LMLocator, middle
LMTLocal mean time
LNGLong (used to indicate the type of approach desired or required)
LOLocator, outer-Connect me to a perforator receiver*
LOCLocalizer, Locally*, location* or located*
LONGLongitude
LORAN† LORAN (long range air navigation system)
LRThe last message received by me was...
LRGLong range
LSThe last message sent by me was... (or last message was...)
LSQLine squall*
LTDLimited
LTTLand-line teletypewriter
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
MMetres (preceded by figures)
M...Mach number (followed by figures)
MAAMinimum authorized altitude
MAGMagnetic
MAINTMaintenance
MALSMedium Intensity Approach Light System*
MALSFMALS with sequenced Flashing lights*
MALSRMALS with Runway alignment indicator*
MAPAeronautical maps and charts
MAPTMissed approach point
MAPtMissed approach point*
MARAt sea March
MASManual Al simplex
MAXMaximum
MAYMay
MBMillibars*
MC...Multiple copy for delivery to... (number) addressees*
MCAMinimum crossing altitude
MCWModulated continuous wave
MDAMinimum descent altitude
MDFMedium frequency direction-finding station
MDHMinimum descent height
MEAMinimum en-route altitude
MEHTMinimum eye height over threshold
MET† Meteorological or meteorology
METAR† Aerodrome routine meteorological weather report (in meteorological code)
MFMedium frequency (300 to 3000 kHz)
MHDFMedium and high frequency direction-finding stations (at the same location)
MHVDFMedium, high and very high frequency direction-finding station (at the same location)
MHZMegahertz
MIDMid-point (related to RVR)
MIFGShallow fog
MILMilitary
MINMinutes
MISMissing... (trans-mission identi-fication)
MKRMarker radio beacon
MLS‡ Microwave landing system
MMMiddle marker
MMMMConnect to... stations (used in multiple transmission, followed by call signs of stations)*
MNMMinimum
MNPSMinimum navigation performance specifications
MNTMonitor or monitoring or monitored
MNTNMaintain
MOCMinimum obstacle clearance (required)
MODModerate (used to qualify icing, turbulence, interference, or static reports)*
MONAbove mountains
MONMonday
MOTNEMeteorological Operational Telecommunications Network Europe
MOVMove or moving or movement
MPHStatute miles per hour*
MPSMetres per second
MRGMedium range
MRPATS/MET reporting point
MSMinus
MSAMinimum safe altitude*
MSAMinimum sector altitude
MSGMessage
MSLMean sea level
MSRMessage... (trans-mission identi-fication) has been misrouted
MTMountain
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
NADPNoise abatement departure procedure
NATNorth Atlantic
NAVNavigation
NBNorth bound
NCNo change
NDI am unable to deliver message... (filing number) addressed to aircraft... (identi-fication): please notify message originator*
NDB‡ Non-directional radio beacon
NENorth-east
NEHI am connecting you to a station which will accept traffic for the station you request*
NGTNight
NIL† None or I have nothing to send to you
NMNautical miles
NMLNormal
NMOCNetwork Manager Operations Centre
NNENorth-north-east
NNWNorth-north-west
NONo
NOFInternational NOTAM office
NOSIG† No significant change (used in trend-type landing forecasts)
NOTAM† A notice 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
NOVNovember
NRNumber
NSNimbostratus
NTLNational
NWNorth-west
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)
OCCThe line is engaged*
OCHObstacle clearance height
OCLObstacle clearance limit*
OCNLOccasional or occasionally
OCSObstacle clearance surface
OCTOctober
OKWe agree or it is correct
OMOuter marker
OPAOpaque, white type of ice formation
OPCControl indicated is operational control
OPMET† Operational meteorological (information)
OPNOpen or opening or opened
OPROperator or operate or operative or operating or operational
OPS† Operations
ORDOrder
OSVOcean station vessel
OTPOn top
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)
PANSProcedures for air navigation services
PAPI† Precision approach path indicator
PAR‡ Precision approach radar
PARLParallel
PCNPavement classification number
PEIce pellets*
PERPerformance
PERMPermanent
PIBPre-flight information bulletin
PJEParachute jumping exercise
PLAPractice low approach
PLNFlight plan
PNPrior notice required
PNRPoint to no return
PODust/sand whirls (Dust devils)
POBPersons on board
PPIPlan position indicator
PPRPrior permission required
PRDProhibited – Restricted - Danger*
PRKGParking
PROB† Probability
PROCProcedure
PROVProvisional
PSPlus
PSGRPassenger*
PSNPosition
PSPPierced steel plank
PTNProcedure turn
PTSPolar track structure
PUNPrepare a new perforated tape for message...*
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
QBICompulsory IFR flight*
QDM‡ Magnetic heading (zero wind)
QDRMagnetic bearing
QFE‡ Atmospheric pressure at aerodrome elevation (or at runway threshold)
QFUMagnetic orientation of runway
QNH‡ Altimeter sub-scale setting to obtain elevation when on the ground
QTETrue bearing
QUADQuadrant
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
RReceived (acknowledgement of receipt)
RRed
RRomeo*
RRight (preceded by runway designation number to identify a parallel runway)
R...Restricted area (followed by identification)
RARain
RACRules of the air and air traffic services
RAGRagged
RAGRunway arresting gear
RAIRunway alignment indicator
RAIMReceiver autonomous integrity monitoring
RAPIDRapid or rapidly*
RASHRain showers
RASNRain and snow or showers of rain and snow*
RBRead back*
RBRescue boat
RCAReach cruising altitude
RCCRescue co-ordination centre
RCFRadio communication failure (message type designator)
RCLRunway centre line
RDHReference datum height (for ILS)*
RDLRadial
RDORadio
RERecent (used to qualify weather phenomena such as rain, e.g. recent rain = RERA)
RECReceive or receiver
REFReference to... or refer to...
REGRegistration
REPReport or reporting or reporting point
REQRequest or requested
RETRapid Exit Taxiway*
RGRange (lights)
RIFReclearance in flight
RITERight (direction of turn)
RMKRemark
RNAV† Area navigation
RNGRadio range
RNPRequired nav. performance
ROBEX† Regional OPMET bulletin exchange (scheme)
ROCRate of climb
RODRate of descent
ROFORRoute forecast (in aeronautical meteorological code)
RONReceiving only
ROTRunway Occupancy Time*
RPLRepetitive flight plan
RPLCReplace or replaced
RPSRadar position symbol
RPTRepeat or I repeat
RQRequest
RQMNTSRequirements
RQPRequest flight plan (message type indicator)
RQSRequest supplementary flight plan (message type indicator)
RSCRescue sub-centre
RSPResponder beacon
RSREn-route surveillance radar
RTDDelayed (used to indicate delayed meteorological message)
RTERoute
RTFRadio-telephone
RTGRadio-telegraph
RTTRadio teletypewriter
RUTStandard regional route transmitting frequencies
RVRescue vessel
RVR‡ Runway visual range
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
SADust-storm, sand-storm, rising dust or rising sand*
SALSSimple approach lighting system
SANSanitary
SAPAs soon as possible
SARSearch and rescue
SARPSStandards and Recommended Practices (ICAO)
SATSaturday
SATCOM† Satellite communication
SBSouth bound
SCStratocumulus
SCTScattered
SDBYStand by
SDFStep down fix
SESouth-east
SEBSouth east bound
SECSeconds
SELCAL† Selective calling system
SEPSeptember
SERService or servicing or served
SEVSevere (used e.g. to qualify icing and turbulence reports)
SFCSurface
SGSnow grains
SGLSignal
SHShowers
SHFSuper high frequency (3 000 to 30 000 MHz)
SID† Standard instrument departure
SIFSelective identification feature
SIGSignificant
SIGMET† Information concerning en-route weather phenomena which may affect the safety of aircraft operations
SIGWXSignificant weather*
SIMULSimultaneous or simultaneously
SIWLSingle isolated wheel load
SKCSky clear
SKEDSchedule or scheduled
SLWSlow
SMCSurface movement control
SMRSurface movement radar
SNSnow
SNOWTAM† 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
SNSHSnow showers*
SPECI† Aerodrome special meteorological report (in meteorological code)
SPECIAL† Special meteorological report (in abbreviated plain language)*
SPLSupplementary flight plan (message type designator)
SPOCSAR point of contact
SPOT† Spot wind
SQSquall
SRSunrise
SRASurveillance radar approach
SRESurveillance radar element of precision approach radar system
SRGShort range
SRRSearch and rescue region
SSSunset
SSBSingle sideband
SSESouth-south-east
SSR‡ Secondary surveillance radar
SSTSupersonic transport
SSWSouth-south-west
STStratus
STAStraight in approach
STAR† Standard (instrument) arrival
STFStratiform
STNStation
STNRStationary
STOLShort take-off and landing
STSStatus
SUBJSubject to
SUNSunday
SUPSupplement (AIP supplement)
SUPPSRegional supplementary procedures
SVCService message
SVCBLServiceable
SWSouth-west
SWBSouth-west bound
SWCSignificant Weather Chart*
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
TATransition altitude
TAATerminal Arrival Altitude
TACAN† UHF tactical air navigation aid
TAF† Aerodrome forecast
TAIL† Tail wind
TARTerminal area surveillance radar
TASTrue airspeed
TAXTaxiing or taxi
TCTropical cyclone
TCHThreshold Crossing Height
TCUTowering cumulus
TDOTornado
TDZTouchdown zone
TECRTechnical reason
TELTelephone
TEMPO† Temporary or temporarily
TENDTrend or tending to*
TFCTraffic
TGLTouch-and-go landing
TGSTaxiing guidance system
THRThreshold
THRUThrough
THUThursday
TIL† Until
TIPUntil past... (place)
TIZTraffic information zone
TKOFTake off
TMA‡ Terminal control area
TNCTerminal Navigation Charge
TOTo... (place)
TOCTop of climb
TODATake-off distance available
TOP† Cloud top
TORATake-off run available
TPTurning point
TRTrack
TRATemporary reserved airspace
TRANSTransmits or transmitter
TSThunderstorm
TSGRThunderstorm with hail*
TSSAThunderstorm with duststorm or sandstorm*
TTTeletype-writer
TUETuesday
TURBTurbulence
TVORTerminal VOR
TWILTwilight*
TWRAerodrome control tower or aerodrome control
TWYTaxiway
TWYLTaxiway-link
TXTText
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
U/SUnserviceable
UABUntil advised by...
UACUpper area control centre
UARUpper air route
UDFUltra high frequency direction-finding station
UFNUntil further notice
UHF‡ Ultra high frequency (300 to 3000 MHz)
UICUpper information centre
UIR‡ Upper flight information region
ULRUltra long range
UNLUnlimited
UNRELUnreliable
UTAUpper control area
UTC‡ Co-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
VALVisual approach and landing chart*
VANRunway control van
VARMagnetic variation
VARVisual-aural radio range
VASIS† Visual approach slope indicator system
VDFVery high frequency direction-finding station
VERVertical
VFR‡ Visual flight rules
VHF‡ Very high frequency (30 to 300 MHz)
VIABy way of...*
VIOHeavy (used to qualify interference or static reports)*
VIP‡ Very important person*
VISVisibility
VLFVery low frequency (3 to 30 kHz)
VLRVery long range
VMC‡ Visual meteorological conditions
VOLMET† Meteorological information for aircraft in flight
VOR‡ VHF omnidirectional radio range
VORTAC† VOR and TACAN combination
VOTVOR airborne equipment test facility
VRBVariable
VSABy visual reference to the ground
VSPVertical speed
VTOLVertical take-off and landing
VVVRetransmit this message to all addressees mentioned in the line-following-the-heading, as though it had been filed locally at your centre (group used in a diversion indicator)*
VVV..VVVMarking or test transmission (sent in a series)*
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
WAWord after... *
WACWorld Aeronautical Chart
- ICAO 1:1 000 000
WAFSWorld area forecast system*
WBWest bound
WBARWing bar lights
WDWords or groups*
WDIWind direction indicator
WDSPRWidespread
WEDWednesday
WEFWith effect from or effective from
WHIWhite*
WIWithin
WIDWidth
WIEWith immediate effect or effective immediately
WIPWork in progress
WKNWeaken or weakening
WNWWest north west
WPTWay-point
WRNGWarning
WSWind shear
WSWWest-south-west
WTSPTWaterspout
WXWeather
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
XXHeavy (used to qualify weather phenomena such as rain, e.g. heavy rain = XXRA)*
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)
YDYards*
YESYes (affirmative)
YRYour