GEN 2.2  Abbreviations used in AIS Publications

Abbreviations marked by an asterisk (*) are either different from or 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
AAmber
A/AAir-to-air
AALAbove aerodrome level
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
ACRAircraft classification rating
ACPAcceptance (message type designator)
ACTActive or activated or activity
ADAerodrome
ADAAdvisory area
ADCAerodrome chart
ADDNAddition or additional
ADFAutomatic direction-finding equipment
ADIZAir defence identification zone (to be pronounced “AY−DIZ”)
ADJAdjacent
ADRAdvisory route
ADSAutomatic dependent surveillance
ADSUAutomatic dependent surveillance unit
ADVSAdvisory service
AESAircraft earth station
AFILFlight plan filed in the air
AFI*Africa − Indian Ocean
AFISAerodrome flight information service
AFMYes or affirm or affirmative or that is correct
AFSAeronautical fixed service
AFTNAeronautical fixed telecommunication network
A/GAir-to-ground
AGAAerodromes, air routes and ground aids
AGLAbove ground level
AGMC*Aerodrome ground movement chart
AICAeronautical information circular
AIMAeronautical information management
AIPAeronautical information publication
AIRACAeronautical information regulation and control
AIREPAir-report
ARINCAeronautical Radio, Incorporated
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
AMC*Airspace management cell
AMDAmend or amended (used to indicate amended meteorological message; message type designator)
AIP AMDTAmendment (AIP Amendment)
AMSAeronautical mobile service
AMSLAbove mean sea level
ANCAeronautical chart - 1:500 000 (followed by name/title)
AO*Aircraft operator
AOCAerodrome obstacle chart (followed by name/title)
APAirport
APCHApproach
APDCAircraft parking/docking chart (followed by name/title)
APNApron
APPApproach control office or approach control or approach control service
APRApril
APRXApproximate or approximately
APVApprove or approved or approval
APT*Receiver for satellite cloud pictures
ARFOR*Area forecast (in aeronautical meteorological code)
AROAir traffic services reporting office
ARPAerodrome reference point
ARPAir-report (message type designator)
ARRArrival (message type designator)
ARRArrive or Arrival
ARSSpecial air-report (message type designator)
ASAltostratus
ASCAscend to or ascending to
ASDAAccelerate-stop distance available
ASM*Airspace management
ASPHAsphalt
AT...At (followed by time at which weather change is forecast to occur)
ATAActual time of arrival
ATCAir traffic control (in general)
ATCSMA*ATC Surveillance Minimum Altitude
ATDActual time of departure
ATFMAir traffic flow management
ATISAutomatic terminal information service
ATMAir traffic management
ATNAeronautical telecommunication network
ATSAir traffic services
ATTNAttention
ATZAerodrome traffic zone
AUGAugust
AUP*Airspace use plan
AUTHAuthorized or authorization
AUWAll up weight
AUXAuxiliary
AVASIS*Abbreviated visual approach slope indicator system
AVBLAvailable or availability
AVGAverage
AVGASAviation 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
BABraking action
BALTIC FRA *BALTIC FAB free route airspace
BASECloud base
BC*Localizer Back Course
BCFGFog patches
BCNBeacon (aeronautical ground light)
BCSTBroadcast
BDRYBoundary
BECMGBecoming
BFRBefore
BKNBroken
BL...Blowing (followed by DU=dust, SA=sand, SN=snow)
BLDGBuilding
BRMist
BRGBearing
BRKGBraking
B RNAV*Basic area navigation
BSCommercial broadcasting station
BTLBetween layers
BTNBetween
. - 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 (preceded by runway designation number to identify a parallel runway)
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)
CAA*Civil Aviation Authority
CAC*Circling Approach Chart
CAG (ZLS)*Cable Arresting Gear
CATCategory
CATClear air turbulence
CAVOKVisibility, cloud and present weather better than prescribed values or conditions
CBCumulonimbus
CCCirrocumulus
CCA* Counter Clockwise arc
CDR*Conditional route
CDNCoordination (message type designator)
CHChannel
CHGModification (message type designator)
CHMI (ČHMÚ) *Czech Hydrometeorogical Institute
CICirrus
CIDINCommon ICAO data interchange network
CITNear or over large towns
CIVCivil
CKCheck
CLCentre line
CLAClear type of ice formation
CLBRCalibration
CLDCloud
CLRClear or cleared to … or clearance
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 or continued
COORCo−ordinate or co−ordination
COPChange-over point
CORCorrect or corrected or correction (used to indicate corrected meteorological message; message type indicator)
COVCover or covered or covering
CPDLCController-pilot data link communications
CPLCurrent flight plan (message type designator)
CR (ČR)*The Czech Republic
CRZCruise
CSCall sign
CSCirrostratus
CTAControl area
CTCContact
CTOTCalculated Take−Off Time
CTLControl
CTNCaution
CTRControl zone
CUCumulus
CUFCumuliform
CUSTCustoms
CVRCockpit voice recorder
CVSMConventional vertical separation minimum
CWA*Clockwise arc
CWYClearway
CZ*Czech language
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)
DDownward (tendency in RVR during previous 10 minutes)
D*Self−briefing display
DADecision altitude
DCKGDocking
DCLDatalink Departure Clearance Service
DCTDirect (in relation to flight plan clearances and type of approach)
DECDecember
DEGDegrees
DEPDepart or departure
DEPDeparture (message type designator)
DESDescend to or descending to ...
DESTDestination
DETRESFADistress phase
DEVDeviation or deviating
DFDRDigital flight data recorder
DFTIDistance from touchdown indicator
DHDecision height
DIFDiffuse
DISTDistance
DIVDivert or diverting
DLADelay (message type designator)
DLADelay or delayed
DLS*Data link service
DLYDaily
DMEDistance measuring equipment
DNGDanger or dangerous
DOMDomestic
DPDew point temperature
DPTDepth
DRDead reckoning
DR...Low drifting (followed by DU=dust, SA=sand or SN=snow)
DRGDuring
DSDuststorm
DTGDate-time group
DTRTDeteriorate or deteriorating
DUDust
DURDuration
DVORDoppler VOR
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
EANPG*European air navigation planning group
EATMS*European air traffic management system
EBEastbound
ECAC*European civil aviation conference
EETEstimated elapsed time
EHFExtremely high frequency (30 000 to 300 000 MHz)
ELBAEmergency location beacon-aircraft
ELEVElevation
ELRExtra long range
EMEmission
EMBDEmbedded in a layer (to indicate cumulonimbus embedded in layers of other clouds)
EMERGEmergency
EN*English language
ENDStop-end (related to RVR)
ENEEast-north-east
ENGEngine
ENREnroute
ENRCEnroute chart (followed by name/title)
EOBDEstimated off−block date
EOBTEstimated off-block time
EQPTEquipment
EPNdB*Unit of effective perceived noise level
EPNL*Effective perceived noise level
ESEEast-south-east
ESTEstimate or estimated or estimation (message type designator)
ETAEstimated time of arrival or estimating arrival
ETDEstimated time of departure or estimating departure
ETOEstimated time over significant point
ETOTEstimated Take−Off Time
EU*the European Union
EUR*European Region
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
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, e.g. FBL RA=light rain)
FBZ*Flight Planning Buffer Zone
FCFunnel cloud (tornado or water spout)
FCSTForecast
FCTFriction coefficient
FDP*Flight data processing
FEBFebruary
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
FM...From (followed by time weather change is forecast to begin)
FMSFlight management system
FMUFlow management unit
FNAFinal approach
FPLFiled flight plan (message type designator)
FPMFeet per minute
FPRFlight plan route
FRFuel remaining
FR*French language
FRAFree Route Airspace
FREQ*Frequency or frequency channel
FRIFriday
FRNGFiring
FRONTFront (relating to weather)
FRQFrequent
FSLFull stop landing
FSSFlight service station
FSTFirst
FTFeet (dimensional unit)
FUSmoke
FUA*Flexibile use of airspace
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
GA*General aviation
GAMETArea forecast for low-level flights
GATGeneral air traffic
GCAGround controlled approach system or ground controlled approach
GENGeneral
GEOGeographic or true
GER*German language
GESGround earth station
GLDGlider
GLONASSGlobal orbiting navigation satellite system (to be pronounced "GLO−NAS")
GMCGround movement chart (followed by name/title)
GNDGround
GNDCKGround check
GNSSGlobal navigation satellite system
GPGlide path
GPSGlobal positioning system
GPUGround power unit
GRHail
GRC*Orthodrome (great circle)
GRASSGrass landing area
GRVLGravel
GSGround speed
GSSmall hail and/or snow pellets
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 the centre of high pressure
H24Continuous day and night service
HAPIHelicopter approach path indicator
HBNHazard beacon
HDFHigh frequency direction-finding station
HDGHeading
HELHelicopter
HEMS*Helicopter Emergency Medical Service
HFHigh frequency (3 000 to 30 000 KHz)
HGTHeight or height above ...
HJSunrise to sunset
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)
HVYHeavy
HVYHeavy (used to indicate the intensity of weather phenomena, e. g. HVY RA=Heavy rain)
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
IACInstrument approach chart (followed by name/title)
IAFInitial approach fix
IAOIn and out of clouds
IAPInstrument approach procedure
IARIntersection of air routes
IASIndicated air speed
IATAInternational Air Transport Association
IBNIdentification beacon
ICIce crystals (very small ice crystals in suspension, also known as diamond dust)
ICAO*International Civil Aviation Organization
ICEIcing
IDIdentifier or identify
IDENTIdentification
IFIntermediate approach fix
IFPS*Initial Flight Plan Processing System
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
INFOInformation
INOPInoperative
INPIf not possible
INPRIn progress
INSInertial navigation system
INSTLInstall or installed or installation
INSTRInstrument
INTIntersection
INTLInternational
INTRGInterrogator
INTRPInterrupt or interruption or interrupted
INTSFIntensify or intensifying
INTSTIntensity
IRIce on runway
ISAInternational standard atmosphere
ISO*International organisation for standartisation
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
JAA*Joint Aviation Authorities
JANJanuary
JAR*Joint Aviation Requirements
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
KGKilogrammes
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 (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
LLocator (see LM, LO)
LAMLogical acknowledgement (message type designator)
LARS*Local Activity Reservation System
LATLatitude
LCALocal or locally or location or located
LDALanding distance available
LDAHLanding distance available, helicopter
LDGLanding
LDILanding direction indicator
LENLength
LFLow frequency (30 to 300 KHz)
LFA (MLČ)*Local flight activity
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
LRGLong range
LTDLimited
LVLight and variable (relating to wind)
LVELeave or leaving
LVLLevel
LVPLow Visibility Procedures
LYRLayer or layered
LVTOLow Visibility Take−Off
LZS*Air rescue service
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
MAPP*Military approach control unit
MAPTMissed approach point
MARMarch
MARO* Military air traffic services reporting office
MAXMaximum
MAYMay
MCAMinimum crossing altitude
MCTR*Military control zone
MDAMinimum descent altitude
MDFMedium frequency direction-finding station
MDHMinimum descent height
MEAMinimum en-route altitude
MEHTMinimum eye height over threshold (for visual approach slope indicator systems)
METMeteorological or meteorology
METARAerodrome routine meteorological report (in meteorological code)
MET REPORTLocal routine meteorological report (in abbreviated plain language)
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 stations (at the same location)
MHZMegahertz
MIDMid-point (related to RVR)
MID*Middle and Far−East
MIFGShallow fog
MILMilitary
MINMinutes
MKRMarker radio beacon
MLAT*Multilateration
MLČ (LFA)*Local flight activity
MLSMicrowave landing system
MM*Middle marker
MNMMinimum
MNPSMinimum navigation performance specifications
MNTNMaintain
MOAMilitary operating area
MOCMinimum obstacle clearance (required)
MODModerate (used to indicate the intensity of weather phenomena, interference or static reports, e.g. MOD RA=moderate rain)
MONMonday
MOPSMinimum operational performance standards
MOTNEMeteorological Operational Telecommunications Network Europe
MOVMove or moving or movement
MPSMetres per second
MRAMinimum reception altitude
MRGMedium range
MRPATS/MET reporting point
MRVA*Minimum radar vectoring altitude
MSMinus
MSAMinimum sector altitude
MSGMessage
MSLMean sea level
MTMA*Military terminal control area
MTOM*Maximum take−off mass
MTOW*Maximum take−off weight
MTUMetric units
MTWMountain waves
MTWR*Military aerodrome control tower
MVDFMedium and very high frequency direction-finding stations (at the same locations)
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
NNo distinct tendency (in RVR during previous 10 minutes)
NAG (ZSS)*Net Arresting Gear
NaPoSy PVO ČR* National Reinforcing Air Defence System of the Czech Republic
NATNorth Atlantic
NATINAMDS* NATO Integrated Air and Missile Defence System
NATO*North Atlantic Treaty Organization
NAVNavigation
NBNorthbound
NCNo change
NDBNon-directional radio beacon
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
NMOC*Network Manager Operations Centre
NMLNormal
NNENorth-north-east
NNWNorth-north-west
NOFInternational NOTAM office
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 concerning with flight operations
NOVNovember
NPZ*Non – standard planning zone
NRNumber
NSNimbostratus
NSCNil significant cloud
NSWNil significant weather
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
OACOceanic area control centre
OASObstacle assessment surface
OAT*Operational air traffic
OBSObserve or observed or observation
OBSCObscure or obscured or obscuring
OBSTObstacle
OCAObstacle clearance altitude
OCAOceanic control area
OCHObstacle clearance height
OCL*Obstacle clearance limit
OCNLOccasional or occasionally
OCSObstacle clearance surface
OCTOctober
OFZObstacle free zone
OHDOverhead
OLDIOn-line data interchange
OMOuter marker
OPAOpaque, white type of ice formation
OPCControl indicated is operational control
OPMETOperational meteorological (information)
OPNOpen or opening or opened
OPROperator or operate or operative or operating or operational
OPSOperations
O/ROn request
OTLKOutlook
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*Prognostic upper air chart
P*Personal consultation
P...Prohibited area (followed by identification)
PAPrecision approach
PALSPrecision approach lighting system (specify category)
PANSProcedures for air navigation services
PAPIPrecision approach path indicator
PARPrecision approach radar
PARLParallel
PATCPrecision approach terrain chart (followed by name/title)
PAXPassenger(s)
PCDProceed or proceeding
PCLPilot-controlled lighting
PCNPavement classification number
PCRPavement classification rating
PDC*Aircraft parking/docking chart
PDGProcedure design gradient
PERPerformance
PERMPermanent
PG/HG (PK/ZK)*parachute glider / hang glider
PGZ*paragliding zone − area for tow winch of parachute and hang glider
PIBPre-flight information bulletin
PJEParachute jumping exercise
PLIce pellets
PL*Abbreviated plain language texts
PLAPractice low approach
PLNFlight plan
PLVLPresent level
PNPrior notice required
PNRPoint of no return
PODust devils
POBPersons on board
POSSPossible
PPIPlan position indicator
PPRPrior permission required
PPSNPresent position
PRFGAerodrome partially covered by fog
PRIPrimary
PRKGParking
PROBProbability
PROCProcedure
PROVProvisional
PSPlus
PSGPassing
PSNPosition
PSRPrimary surveillance radar
PTNProcedure turn
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
QDMMagnetic heading (zero wind)
QDRMagnetic bearing
QFEAtmospheric pressure at aerodrome elevation (or at runway threshold)
QFUMagnetic orientation of runway
QNHAltimeter 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
RRed
. - 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
R...Restricted area (followed by identification)
RARain
RACRules of the air and air traffic services
RADIM*Radio Information Beacon
RADV*Minimum radar vectoring altitude chart
RAGRagged
RAGRunway arresting gear
RAIRunway alignment indicator
RAIMReceiver autonomous integrity monitoring
RBRescue boat
RCAReach cruising altitude
RCCRescue coordination centre
RCFRadiocommunication failure (message type designator)
RCHReach or reaching
RCLRunway centre line
RCLLRunway centre line light(s)
RCLRRecleared
RDHReference datum height
RDLRadial
RDORadio
RDPRadar data processing
RE...Recent (used to qualify weather phenomena, e. g. RERA=recent rain)
RECReceive or receiver
REDLRunway edge light(s)
REFReference to … or refer to...
REGRegistration
REG*Regional
RENLRunway end light(s)
REPReport or reporting or reporting point
REQRequest or requested
RERTERe-route
RESARunway end safety area
RFFSRescue and fire fighting services
RGRange (lights)
RHCRight-hand circuit
RIFReclearance in flight
RLReport leaving
RLARelay to
RLLSRunway lead-in lighting system
RMACRadar minimum altitude chart
RMKRemark
RMZ*Radio mandatory zone
RNAVArea navigation (to be pronounced “AR-NAV”)
RNGRadio range
RNPRequired navigation performance
ROBEXRegional OPMET bulletin exchange (scheme)
ROCRate of climb
RODRate of descent
ROFORRoute forecast (in meteorological code)
RPA*Remotely piloted aircraft
RPAS*Remotely piloted aircraft system
RPLRepetitive flight plan
RPLCReplace or replaced
RPSRadar position symbol
RPS*Remote pilot station
RQMNTSRequirements
RQPRequest flight plan (message type designator)
RQSRequest supplementary flight plan (message type designator)
RRReport reaching
RRADelayed meteorological message (or RRB, RRC ... etc., in sequence) (message type designator)
RSCRescue sub-centre
RSCDRunway surface condition
RSPResponder beacon
RSREn-route surveillance radar
RTDDelayed (used to indicate delayed meteorological message; message type designator)
RTERoute
RTFRadiotelephone
RTGRadiotelegraph
RTHLRunway threshold light(s)
RTNReturn or returned or returning
RTODAHRejected take-off distance available, helicopter
RTSReturn to service
RTTRadioteletypewriter
RTZLRunway touchdown zone light(s)
RUS*Russian language
RUTStandard regional route transmitting frequencies
RVRescue vessel
RVRRunway visual range
RVSM*Reduced vertical separation minimum (300 m (1000 ft)) between FL 290 and FL 410
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
S*Surface analysis (current chart)
SSouth or southern latitude
SASand
SALSSimple approach lighting system
SANSanitary
SAPAs soon as possible
SARSearch and rescue
SARPSStandards and Recommended Practices (ICAO)
SATSaturday
SATCOMSatellite communication
SBSouthbound
SCStratocumulus
SCTScattered
SDBYStand by
SDF*Stepdown fix
SDR*Special drawing rights
SESouth-east
SEBSouth-eastbound
SECSeconds
SECSI FRA*South East Common Sky Initiative Free Route Airspace
SECTSector
SEE FRA*South East Europe Free Route Airspace
SELCALSelective calling system
SEPSeptember
SERService or servicing or served
SERA*Standardized European Rules of the Air
SEVSevere (used e.g. to qualify icing and turbulence reports)
SFCSurface
SGSnow grains
SGLSignal
SH...Showers (followed by RA=rain, SN=snow, PL=ice pellets, GR=hail, GS=small hail and/or snow pellets or combinations thereof, e.g. SHRASN=showers of rain and snow)
SHFSuper high frequency (3 000 to 30 000 MHz)
SIDStandard instrument departure
SIFSelective identification feature
SIGMETInformation concerning en-route weather phenomena which may affect the safety of aircraft operations
SIGWX*Significant weather
SIMULSimultaneous or simultaneously
SITA Airline Telecommunication and Information Service
SIWLSingle isolated wheel load
SKCSky clear
SKEDSchedule or scheduled
SLPSpeed limiting point
S LPS* Air traffic services unit
SLWSlow
SLZ*Sport Flying Equipment
SMCSurface movement control
SMRSurface movement radar
SNSnow
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
SPA*Spanish language
SPECIAerodrome special meteorological report (in meteorological code)
SPECIALLocal special meteorological report (in abbreviated plain language)
SPLSupplementary flight plan (message type designator)
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
STSStatus
STWLStopway light(s)
SUBJSubject to
SUNSunday
SUPSupplement (AIP Supplement)
SUPPSRegional supplementary procedures
SVCService message
SVCBLServiceable
SWSouth-west
SWBSouth-westbound
SWH*Significant weather chart − high level
SWL*Significant weather chart − low level
SWM*Significant weather chart − medium level
SWYStopway
SZZ* Lighting system
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*Tropopause chart
TATransition altitude
TACANUHF tactical air navigation aid
TAFAerodrome forecast (in meteorological code)
TAILTail wind
TARTerminal area surveillance radar
TASTrue airspeed
TAXTaxiing or taxi
TB*Beginning of civil morning twilight
TCTropical cyclone
TCASTraffic alert and collision avoidance system
TCUTowering cumulus
TDOTornado
TDZTouchdown zone
TE*End of civil twilight
TECRTechnical reason
TELTelephone
TEMPOTemporary or temporarily
TFCTraffic
TGLTouch-and-go landing
TGL*Temporary Guidance Leaflet
TGSTaxiing guidance system
THRThreshold
THRUThrough
THUThursday
TILUntil
TIPUntil past … (place)
TKOFTake-off
TL...Till (followed by time by which weather change is forecast to end)
TLOFTouchdown and lift-off area
TMATerminal control area
TNATurn altitude
TNHTurn height
TOTo … (place)
TOCTop of climb
TODATake-off distance available
TODAHTake-off distance available, helicopter
TOPCloud top
TORATake-off run available
TPTurning point
TRTrack
TRA*Temporary reserved area
TRA GA*Temporary reserved area designated for operations of general aviation
TRANSTransmits or transmitter
TRENDTrend forecast
TRLTransition level
TROPTropopause
TSThunderstorm (in aerodrome reports and forecasts, TS used alone means thunder heard but no precipitation at the aerodrome)
TS...Thunderstorm (followed by RA=rain, SN=snow, PL=ice pellets, GR=hail, GS=small hail and/or snow pellets or combinations thereof, e. g. TSRASN=thunderstorm with rain and snow)
TSA*Temporary segregated area
TTOTarget time over
TUETuesday
TURBTurbulence
TVORTerminal VOR
TWRAerodrome control tower or aerodrome control
TWYTaxiway
TWYLTaxiway-link
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 (tendency in RVR during previous 10 minutes)
U*Upper air analysis (current chart)
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
ULRUltra long range
UNAUnable
UNAPUnable to approve
UNLUnlimited
UNRELUnreliable
U/SUnserviceable
UTAUpper control area
UTCCoordinated Universal Time
UTM*Unmanned aircraft traffic management
UUP*Update use plan
UPS*Uninterruptible power supply
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
VACVisual approach chart (followed by name/title)
VALIn valleys
VANRunway control van
VARVisual−aural radio range
VARMagnetic variation
VASISVisual approach slope indicator systems
VCVicinity of aerodrome (followed by FG=fog, FC=funnel cloud, SH=showers, PO=dust/sand whirls, BLDU=blowing dust, BLSA=blowing sand, BLSN=blowing snow, DS=duststorm, SA=sandstorm, TS=thunderstorm or VA=volcanic ash e.g. VCFG = vicinity fog)
VCYVicinity
VDFVery high frequency direction-finding station
VDGS*Visual Docking Guidance System
VERVertical
VFRVisual flight rules
VFRC*VFR Arrivals and Departures Chart
VHFVery high frequency (30 to 300 MHz)
VIPVery important person
VISVisibility
VLFVery low frequency (3 to 30 KHz)
VLRVery long range
VMCVisual meteorological conditions
VOCVisual operations chart
VOLMETMeteorological information for aircraft in flight
VORVHF omnidirectional radio range
VORTACVOR and TACAN combination
VOTVOR airborne equipment test facility
VRBVariable
VSABy visual reference to the ground
VSPVertical speed
VTOLVertical take-off and landing
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
WACWorld Aeronautical Chart - ICAO 1 : 1 000 000 (followed by name/title)
WAFCWorld area forecast centre
WAM*Wide Area Multilateration System
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
WINTEMForecast upper wind and temperature for aviation
WIPWork in progress
WKNWeaken or weakening
WNWWest-north-west
WOWithout
WPTWay-point
WRNGWarning
WSWind shear
WSPDWind speed
WSWWest-south-west
WTWeight
WTSPTWaterspout
WXWeather
WXR*Weather 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
XSAtmospheric
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)
YD*Yards
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
ZCoordinated Universal Time (in meteorological messages)
- 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
Symbols
*Address
( - 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
(Telephone
7 - 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
7Fax
™ - 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
™E−mail
þ - 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
þInternet address
- 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