|
A
|
|
A
|
Amber
|
AIREP
|
Air-report
|
|
A/A
|
Air- to Air
|
AIS
|
Aeronautical information services
|
|
AAL
|
Above aerodrome level
|
ALA
|
Alighting area
|
|
ABM
|
Abeam
|
ALERFA
|
Alert phase
|
|
ABT
|
About
|
ALR
|
Alerting (message type designator)
|
|
ABV
|
Above
|
ALRS
|
Alerting service
|
|
ACAS
|
Airborne collision avoidance system
|
ALS
|
Approach lighting system
|
|
ACC
|
Area control centre or Area control
|
ALT
|
Altitude
|
|
ACCID
|
Notification of an aircraft accident
|
ALTN
|
Alternate or alternating (light alternates in colour ) or alternate (aerodrome)
|
|
ACFT
|
Aircraft
|
AMD
|
Amend or amended
|
|
ACK
|
Acknowledge
|
AMDT
|
Amendment
|
|
ACL
|
Altimeter check location
|
AMS
|
Aeronautical mobile service
|
|
ACPT
|
Accept or accepted
|
AMSL
|
Above mean sea level
|
|
ACS
|
Aeronautical Communication Station
|
AMSS
|
Aeronautical mobile satellite service
|
|
ACT
|
Active or activated or activity
|
AOC
|
Aerodrome obstacle chart
|
|
AD
|
Aerodrome
|
AP
|
Airport
|
|
ADA
|
Advisory Area
|
APCH
|
Approach
|
|
ADDN
|
Addition or Additional
|
APN*
|
Apron
|
|
ADF
|
Automatic direction finding equipment
|
APP
|
Approach control office or approach control or approach control services
|
|
ADIZ
|
Air Defence identification zone
|
APR
|
April
|
|
ADJ
|
Adjacent
|
APRX
|
Approximate or approximately
|
|
ADR
|
Advisory route
|
APV
|
Approve or approved or approval
|
|
ADS
|
Automatic dependent surveillance
|
ARFOR
|
Area forecast
|
|
ADVS
|
Advisory service
|
ARNG
|
Arrange
|
|
ADZ
|
Advice
|
ARO
|
Air traffic services reporting office
|
|
AES
|
Aircraft earth station
|
ARP
|
Aerodrome reference point
|
|
AFIL
|
Flight plan filled in the air
|
ARR
|
Arrive or arrival (message type designator)
|
|
AFIS
|
Aerodrome flight information service
|
ASC
|
Ascent or ascending to
|
|
AFS
|
Aeronautical fixed service
|
ASDA
|
Accelerated stop distance available
|
|
AFT
|
After (time or place)
|
ASPH
|
Asphalt
|
|
A/G
|
Air to ground
|
ATA
|
Actual time of arrival
|
|
AGA
|
Aerodrome , air routes and ground aids
|
ATC
|
Air traffic control
|
|
AGL
|
Above ground level
|
ATD
|
Actual time of departure
|
|
AGN
|
Again
|
ATFM
|
Air traffic flow management
|
|
AIC
|
Aeronautical information circular
|
ATIS
|
Automatic terminal information service
|
|
AIP
|
Aeronautical information publication
|
ATM
|
Air traffic management
|
|
AIRAC
|
Aeronautical information regulation and control
|
ATN
|
Aeronautical telecommunication network
|
|
ATTN
|
Attention
|
ATS
|
Air traffic services
|
|
ATZ
|
Aerodrome traffic zone
|
|
|
|
AUG
|
August
|
|
|
|
AUW
|
All up weight
|
|
|
|
AUTH
|
Authorized or authorization
|
|
|
|
AUX
|
Auxiliary
|
|
|
|
AVASIS
|
Abbreviated visual approach slope indicator system
|
|
|
|
AVBL
|
Available
|
|
|
|
AVGAS
|
Aviation gasoline
|
|
|
|
AWY
|
Airway
|
|
|
|
AZM
|
Azimuth
|
|
|
|
ARP
|
Air Report (message type designators)
|
|
|
|
AS
|
Altostratus
|
|
|
|
AUG
|
August
|
|
|
|
AUW
|
All up weight
|
|
|
|
AUTH
|
Authorized or authorization
|
|
|
|
B
|
|
B
|
Blue
|
BLO
|
Below clouds
|
|
BA
|
Braking action
|
BLSN
|
Blowing snow
|
|
BCN
|
Beacon
|
BCFG
|
Fog patches
|
|
BCST
|
Broadcast
|
BRG
|
Bearing
|
|
BDRY
|
Boundary
|
BRKG
|
Breaking
|
|
BECMG
|
Becoming
|
BASE
|
Cloud base
|
|
BFR
|
Before
|
BTN
|
Between
|
|
BKN
|
Broken
|
|
|
|
BLDG
|
Building
|
|
|
|
BLW
|
Below
|
|
|
|
C
|
|
C
|
Degree Celsius (Centigrade)
|
CMB
|
Climb to or climbing to
|
|
CAT
|
Category or clear air turbulence
|
CMPL
|
Completion or complete
|
|
CAVOK
|
Visibility, cloud and present weather better than prescribed value or conditions
|
CNL
|
Cancel or cancelled or flight plan cancellation (message type designator)
|
|
CB
|
Cumulonimbus
|
CNS
|
Communication navigation and surveillance
|
|
CC
|
Cirrocumulus
|
COM
|
Communication
|
|
CDN
|
Coordination (message type designator)
|
CL
|
Centre line
|
|
CFM
|
Confirm or I confirm
|
COND
|
Condition
|
|
CIDIN
|
Common ICAO data interchange network
|
CONS
|
Continuous
|
|
CLD
|
Cloud
|
CONST
|
Construction or constructed
|
|
CLR
|
Clear(s) or cleared to or clearance
|
CONT
|
Continue (s) or continued
|
|
CLSD
|
Close or closed or closing
|
COORD
|
Co-ordinate or co-ordination
|
|
CM
|
Centimeter
|
CTA
|
Control Area
|
|
CTR
|
Control Zone
|
|
|
|
CTN
|
Caution
|
|
|
|
D
|
|
D***
|
Danger area (followed by identification)
|
DLY*
|
Daily
|
|
DA
|
Decision altitude
|
DME
|
Distance measuring equipment
|
|
DCD
|
Double channel duplex
|
DNG
|
Danger or dangerous
|
|
DCKG
|
Docking
|
DOC*
|
Document (S)
|
|
DCS
|
Double channel simplex
|
DPT
|
Depth
|
|
DCT
|
Direct (in relation to flight plan clearance and type of approach)
|
DP
|
Dew point temperature
|
|
DEV
|
Deviation
|
DZ
|
Drizzle
|
|
DIV
|
Divert or Diverting
|
DSB
|
Double side band
|
|
DEP
|
Depart or departure
|
DTAM
|
Descend to and maintain
|
|
DTRT
|
Deteriorate or deteriorating
|
DW
|
Dual wheels
|
|
DES
|
Descend to or descending to
|
DUR
|
Duration
|
|
DEST
|
Destination
|
DVOR
|
Doppler VOR
|
|
DETRESFA
|
Distress phase
|
|
|
|
DFTI
|
Distance from touch down indicator
|
|
|
|
DGCA*
|
Director general of civil aviation
|
|
|
|
DH
|
Decision height
|
|
|
|
DISP*
|
Displaced
|
|
|
|
DIST
|
Distance
|
|
|
|
DLA
|
Delay or delayed (message type designator)
|
|
|
|
E
|
|
EAT
|
Expected approach time
|
ETD
|
Estimated time of departure or estimating departure
|
|
EB
|
East bound
|
ETO
|
Estimated time over significant point
|
|
EET
|
Estimated elapsed time
|
EV
|
Every
|
|
ELBA
|
Emergency location beacon aircraft
|
EXC
|
Except
|
|
ELECT
|
Electric, Electricity
|
EXER
|
Exercises or exercising or to exercise
|
|
EN*
|
English
|
EXP
|
Except or excepted or expecting
|
|
ENE
|
East north east
|
EXTD
|
Extend or extending
|
|
END
|
Stop-end (related to RVR)
|
|
|
|
ENRT
|
En - route
|
|
|
|
EOBT
|
Estimated off block time
|
|
|
|
EQPT
|
Equipment
|
|
|
|
ERC*
|
En-route chart
|
|
|
|
ESE
|
East south east
|
|
|
|
EST
|
Estimate or estimated (message type designator)
|
|
|
|
ETA
|
Estimated time of arrival or estimating arrival
|
|
|
|
ETC*
|
Etceteras
|
|
|
|
F
|
|
F
|
Fixed
|
FMU
|
Flow management unit
|
|
FAC
|
Facilities
|
FNA
|
Final approach
|
|
FAF
|
Final approach point
|
FOD
|
Foreign object damage
|
|
FAL
|
Facilitation of international air transport
|
FPL
|
Filed flight plan (message type designator)
|
|
FAP
|
Final approach point
|
FPM
|
Feet per minute
|
|
FATO
|
Final approach and take-off area
|
FREQ
|
Frequency
|
|
FAX
|
Facsimile transmission
|
FZ
|
Freezing
|
|
FCT
|
Friction coefficient
|
FRNG
|
Firing
|
|
FCST
|
Forecast
|
FRQ
|
Frequent
|
|
FD
|
Fixed Distance
|
FSL
|
Full stop landing
|
|
FG
|
Fog
|
FSS
|
Flight service station
|
|
FIR
|
Flight information region
|
FST
|
First
|
|
FIC
|
Flight information centre
|
FT
|
Feet
|
|
FIS
|
Flight information service
|
FU
|
Smoke
|
|
FISA
|
Automated flight information service
|
|
|
|
FL
|
Flight level
|
|
|
|
FLG
|
Flashing
|
|
|
|
FLR
|
Flares
|
|
|
|
FLT
|
Flight
|
|
|
|
FLTCK
|
Flight check
|
|
|
|
FLUC
|
Fluctuating or fluctuated or fluctuation
|
|
|
|
FLW
|
Follow (s) or following
|
|
|
|
FLY
|
Fly or flying
|
|
|
|
FM
|
From
|
|
|
|
G
|
|
G
|
Green
|
GR
|
Group
|
|
G/A
|
Ground to air
|
GRASS
|
Grass landing area
|
|
G/A/G
|
Ground to air and air to ground
|
GS
|
Ground speed
|
|
GCA
|
Ground control approach system or ground control approach
|
|
|
|
GEN
|
General
|
|
|
|
GEO
|
Geographic
|
|
|
|
GES
|
Ground earth station
|
|
|
|
GLD
|
Glider
|
|
|
|
GND
|
Ground
|
|
|
|
GNDCK
|
Ground check
|
|
|
|
GNSS
|
Global navigation satellite system
|
|
|
|
GP
|
Glide path
|
|
|
|
GPS
|
Global Positioning System
|
|
|
|
H
|
|
H+*
|
Hours plus ...minutes past the hour
|
HOL
|
Holiday
|
|
H24
|
Continuos day and night service
|
HOSP
|
Hospital aircraft
|
|
HBN
|
Hazard beacon
|
HPA
|
Hectopascal
|
|
HDF
|
High frequency direction finding station
|
HQ*
|
Headquarters
|
|
HDG
|
Heading
|
HR
|
Hours
|
|
HEL
|
Helicopter
|
HS
|
Service available during hours of Scheduled operations
|
|
HEL-L*
|
Light helicopter (radius of action of 50NM and capacity for evacuating one person)
|
HX
|
No specific working hours
|
|
HEL-M*
|
Medium helicopter (radius of action of 50 to 100NM and capacity for evacuating 2-5 persons)
|
HZ
|
Dust haze
|
|
HEL-H*
|
Heavy helicopter (radius of action in excess of 100 NM and capacity for evacuating more than 5 persons)
|
HZ
|
Hertz (cycle per second )
|
|
HF
|
High frequency (3000 to 30000 khz)
|
|
|
|
HGT
|
Height or height above
|
|
|
|
HJ
|
Sunrise to sunset
|
|
|
|
HLDG
|
Holding
|
|
|
|
HN
|
Sunset to sunrise
|
|
|
|
HO
|
Service available to meet operational requirements
|
|
|
|
I
|
|
IAC
|
Instrument approach chart
|
INBD
|
Inbound
|
|
IAF
|
Initial approach fix
|
INSTL
|
Install or installed or installation
|
|
IAR
|
Intersection of air routes
|
INSTR
|
Instrument
|
|
IAS
|
Indicated air speed
|
INT
|
Intersection
|
|
IBN
|
Identification beacon
|
INTL
|
International
|
|
ID
|
Identifier or identify
|
INTRG
|
Interrogator
|
|
IDENT
|
Identification
|
INTRP
|
Interrupt or interruption or interrupted
|
|
IF
|
Intermediate approach fix
|
INTSF
|
Intensify or intensifying
|
|
IFR
|
Instrument flight rules
|
INTST
|
Intensity
|
|
IGA
|
International general aviation
|
ISA
|
International standard atmosphere
|
|
ILS
|
Instrument landing system
|
ISB
|
Independent sideband
|
|
IM
|
Inner marker
|
ISOL
|
Isolated
|
|
IMC
|
Instrument meteorological conditions
|
|
|
|
IMG
|
Immigration
|
|
|
|
IMPR
|
Improve or improving
|
|
|
|
IMT
|
Immediate or immediately
|
|
|
|
INA
|
Initial approach
|
|
|
|
J
|
|
JAN
|
January
|
|
|
|
JUL
|
July
|
|
|
|
JUN
|
June
|
|
|
|
K
|
|
KG
|
Kilograms
|
KRA
|
Kilopascal
|
|
KHZ
|
Kiloherz
|
KT
|
Knots
|
|
KM
|
Kilometres
|
KW
|
Kilowatt
|
|
KMH
|
Kilometres per hour
|
|
|
|
L
|
|
L
|
Left (runway identification)
|
LO
|
Locator , outer
|
|
L
|
Locator (see LM, LO)
|
LOC
|
Local or locally or location or located
|
|
LAT
|
Latitude
|
LONG
|
Longitude
|
|
LDA
|
Landing distance available
|
LORAN
|
LORAN(Long range navigation system)
|
|
LDG
|
Landing
|
LRG
|
Long range
|
|
LDI
|
Landing direction indicator
|
LSQ
|
Line squall
|
|
LEN
|
Length
|
LT*
|
Local time
|
|
LF
|
Low frequency (30 to 300 khz)
|
LTD
|
Limited
|
|
LGT
|
Light
|
LTT
|
Landline teletypewriter
|
|
LGTD
|
Lighted
|
LV
|
Light and variable(relating to wind)
|
|
LIH
|
Light intensity high
|
LVL
|
Level
|
|
LIM
|
Light intensity medium
|
LYR
|
Layer or layered
|
|
LLZ
|
Lacalizer
|
|
|
|
LM
|
Locator middle
|
|
|
|
LNG
|
Long (used to indicate the type of approach desired or required)
|
|
|
|
M
|
|
M
|
Mach number (followed by figures) or Metres (preceded by figures )
|
MNM
|
Minimum
|
|
MAG
|
Magnetic
|
MNPS
|
Minimum navigation performance specification
|
|
MAINT
|
Maintenance
|
MNT
|
Monitor or monitoring or monitored
|
|
MAP
|
Aeronautical maps and charts
|
MNTN
|
Maintain
|
|
MAPT
|
Missed approach point
|
MOA
|
Military operating area
|
|
MAR
|
March
|
MOB
|
Mobile
|
|
MAX
|
Maximum
|
MOC
|
Minimum obstacle clearance (required)
|
|
MAY
|
May
|
MOD
|
Moderate
|
|
MCA
|
Minimum crossing altitude
|
MRA
|
Minimum reception altitude
|
|
MCW
|
Modulated continuous wave
|
MRG
|
Medium range
|
|
MDA
|
Minimum descent altitude
|
MRP
|
ATS/MET reporting point
|
|
MDH
|
Minimum descent height
|
MS
|
Minus
|
|
MEA
|
Minimum en-route altitude
|
MSA
|
Minimum sector altitude
|
|
MEHT
|
Minimum eye height threshold(for visual approach slope indicator system
|
MSG
|
Message
|
|
MET
|
Meteorology or meteorological
|
MSL
|
Mean sea level
|
|
METAR
|
Aviation routine weather report (in aeronautical code)
|
MTU
|
Metric units
|
|
MHZ
|
Megahertz
|
MWO
|
Meteorological watch office
|
|
MIL
|
Military
|
|
|
|
MIFG
|
Shallow fog
|
|
|
|
MKR
|
Marker radio beacon
|
|
|
|
MLS
|
Microwave landing system
|
|
|
|
MM
|
Middle marker
|
|
|
|
N
|
|
N
|
North or northern latitude
|
NNE
|
North North East
|
|
NAV
|
Navigation
|
NNW
|
North North West
|
|
NC
|
No change
|
NOF
|
International NOTAM office
|
|
NDB
|
Non directional radio beacon
|
NOSIG
|
No significant change (used in trend type landing forecasts )
|
|
NE
|
North east
|
NOV
|
November
|
|
NGT
|
Night
|
NR
|
Number
|
|
NIL
|
None or I have nothing to send to you
|
NS
|
Nimbostratus
|
|
NM
|
Nautical mile
|
NW
|
North west
|
|
NML
|
Normal
|
NXT
|
Next
|
|
O
|
|
OAC
|
Oceanic area control centre
|
OFZ
|
Obstacle Free Zone
|
|
OAS
|
Obstacle assessment surface
|
OM
|
Outer marker
|
|
OBS
|
Observe or observed or observation
|
OPMET
|
Operational meteorological (information)
|
|
OBST
|
Obstacle
|
OPN
|
Open or opened or opening
|
|
OBSTR*
|
Obstruction
|
OPR
|
Operator or operate or operative or operating or operational
|
|
OCA
|
Oceanic control area or obstacle clearance altitude
|
OPS
|
Operations
|
|
OCC
|
Occulting light
|
O/R
|
On request
|
|
OCH
|
Obstacle clearance height
|
OTP
|
On top
|
|
OCNL
|
Occasional or occasionally
|
OTS
|
Organised track system
|
|
OCS
|
Obstacle clearance surface
|
OUBD
|
Out of bound
|
|
OCT
|
October
|
|
|
|
P
|
|
P...
|
Prohibited area (followed by identification)
|
PPI
|
Plan position indicator
|
|
PALS
|
Precision approach lighting system
|
PPR
|
Prior permission required
|
|
PANS
|
Procedures for air navigation services
|
PRI
|
Primary
|
|
PAPI
|
Precision approach path indicator
|
PRKG
|
Parking
|
|
PAR
|
Precision approach radar
|
PROB
|
Probability
|
|
PARL
|
Parallel
|
PROC
|
Procedure
|
|
PAX
|
Passenger (s)
|
PROV
|
Provisional
|
|
PCN
|
Pavement classification number
|
PS
|
Plus
|
|
PER
|
Performance
|
PSN
|
Position
|
|
PERM
|
Permanent
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PSP
|
Pierced steel plank
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PIB*
|
Pre-flight information bulletin
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PSR*
|
Primary surveillance radar
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PJE
|
Parachute jumping exercise
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PT*
|
Point (s)
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PLA
|
Practice low approach
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PTN
|
Procedure turn
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PLN
|
Flight plan
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PVT*
|
Private
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PN
|
Prior notice required
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PWR
|
Power
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PNR
|
Point of no return
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POB
|
Persons on board
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POSS
|
Possible
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Q
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QBI
|
Compulsory IFR flight
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QNH
|
Altimeter sub-scale setting to obtain Elevation when on ground
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QBM
|
Magnetic heading (zero wind)
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QTE
|
True bearing
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QDR
|
Magnetic bearing
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QUAD
|
Quadrant
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QFE
|
Atmospheric pressure at aerodrome elevation (or at runway threshold)
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QFU
|
Magnetic orientation of runway
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R
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R
|
Red
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RNP
|
Required navigation performance
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R...
|
Restricted area (followed by identification)
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ROC
|
Rate of climb
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R
|
Runway (runway identification)
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ROD
|
Rate of descent
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RAC
|
Rules of the air and air traffic services
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ROFOR
|
Route forecast ( in aeronautical met. code)
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RAD*
|
Radius
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RON
|
Receiving only
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RAG
|
Runway arresting gear
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RPL
|
Repetitive flight plan
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RAI
|
Runway alignment indicator
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RPLC
|
Replace or replaced
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RASH
|
Rain showers
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RPS
|
Radar position symbol
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RCA
|
Reach cruising altitude
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RPT
|
Repeat
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RCC
|
Rescue coordination centre
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RQP
|
Request flight plan (message type designator)
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RCF
|
Radio communication failure (message type designator)
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RQS
|
Request supplementary flight plan (message type designator)
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RCL
|
Runway center line
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RR
|
Report reaching
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RCLL
|
Runway center line light (s)
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RSC
|
Rescue sub-centre
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RDH
|
Reference datum height (for ILS)
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RSCD
|
Runway surface condition
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RDL
|
Radial
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RSP
|
Responder beacon
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RDO
|
Radio
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RSR
|
En-route surveillance radar
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RD
|
Road
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RTE
|
Route
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REC
|
Receive or receiver
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RTF
|
Radio telephone
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REDL
|
Runway edge light (s)
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RTG
|
Radio telegraph
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REF
|
Reference to... or refer to...
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RDHL
|
Runway threshold light (s)
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REG
|
Registration
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RTN
|
Return or returned or returning
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RENL
|
Runway end light (s)
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RQMNTS
|
Requirements
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REP
|
Report or reporting or reporting point
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RTS
|
Return to service
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REQ
|
Request or requested
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RTT
|
Radio teletypewriter
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RERTE
|
Re-route
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RIZL
|
Runway touch down zone light (s)
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RES*
|
Reservation
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RUT
|
Standard regional route transmitting freq.
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RESA
|
Runway End Safety Area
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RV
|
Rescue vessel
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RFC*
|
Radio facility chart
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RVR
|
Runway visual range
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RG
|
Range
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RWY
|
Runway
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RH*
|
Rescue helicopter
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RIF
|
Re-clearance in flight
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RITE
|
Right (direction of turn)
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RLLS
|
Runway lead in lighting system
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RMK
|
Remark
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RNAV
|
Area navigation (to be pronounced "ARNAV"
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RR
|
Report reaching
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S
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S
|
South or southern latitude
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SRE
|
Surveillance radar element of precision approach radar system
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SALS
|
Simple approach lighting system
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SRG
|
Short range
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SAN
|
Sanitary
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SRR
|
Search and rescue region
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SAP
|
As soon as possible
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SRY
|
Secondary
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SAR
|
Search and rescue
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SS
|
Sunset
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SARPS
|
Standards and recommended practices
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SSB
|
Single sideband
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SAT
|
Saturday
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SSE
|
South south east
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SATCOM
|
Satellite communication
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SSR
|
Secondary surveillance radar
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SB
|
South bound
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SST
|
Supersonic transport
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SC
|
Stratocumulus
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SSW
|
South south west
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SCT
|
Scattered
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ST
|
Stratus
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SDBY
|
Stand by
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STA
|
Straight in approach
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SE
|
South east
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STAR
|
Standard instrument arrival
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SEC
|
Seconds
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STD
|
Standard
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SECT
|
Sector
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STF
|
Stratiform
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SELCAL
|
Selective calling system
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STN
|
Station
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SEP
|
September
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STNR
|
Stationary
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SER
|
Service or servicing or served
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STOL
|
Short take-off and landing
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SEV
|
Severe
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STWL
|
Stop way light (s)
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SFC
|
Surface
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SUBJ
|
subject to
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SGL
|
Signal
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SUN
|
Sunday
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SID
|
Standard instrument departure
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SUP
|
Supplement (AIP Supplement )
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SIF
|
Selective identification feature
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SUPPS
|
Regional supplementary procedures
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SIGMET
|
Information concerning en-route weather phenomena which may affect the safety of aircraft ops.
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SVC
|
Service message
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SIGWX
|
Significant weather
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SVCBL
|
Serviceable
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SIMUL
|
Simultaneous or simultaneously
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SW
|
South west
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SMC
|
Surface movement control
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SMR
|
Surface movement radar
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SPECI
|
Aviation selected special weather report (in aeronautical meteorological code )
|
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SPECIAL
|
Special meteorological report (in abbreviated plain language )
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SPL
|
Supplementary flight plan (message type designator )
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SPOT
|
Spot wind
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SQ
|
Squall
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SR
|
Sunrise
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SRA
|
Surveillance radar approach
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T
|
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T
|
Temperature
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TLOF
|
Touch down and lift-off area
|
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TA
|
Transition altitude
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TMA
|
Terminal control area
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TACAN
|
UHF tactical air navigation aid
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TOC
|
Top climb TODA
|
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TAF
|
Aerodrome forecast
|
TODA
|
Take-off distance available
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TAIL
|
Tail wind
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TOP
|
Cloud top
|
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TAR
|
Terminal area surveillance radar
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TRA
|
Temporary reserved airspace
|
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TAS
|
True air speed
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TRNG*
|
Training
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TAX
|
Taxing or taxi
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TRANS
|
Transmit or transmitter
|
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TCU
|
Towering cumulus
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TRL
|
Transition level
|
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TDZ
|
Touch down zone
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TS
|
Thunderstorm
|
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TECR
|
Technical reason
|
TT
|
Teletypewriter
|
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TEL
|
Telephone
|
TUE
|
Tuesday
|
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TEMPO
|
Temporary or temporarily
|
TURB
|
Turbulence
|
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TFC
|
Traffic
|
TVOR
|
Terminal VOR
|
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TGL
|
Touch and go landing
|
TWR
|
Aerodrome control tower or aerodrome control
|
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TGS
|
Taxing guidance system
|
TWY
|
Taxi
|
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THR
|
Threshold
|
TWYL
|
Taxiway link
|
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THRU
|
Through
|
TYP
|
Type of aircraft
|
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THU
|
Thursday
|
TYPH
|
Typhoon
|
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TIL
|
Until
|
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TKOF
|
Take-off
|
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U
|
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UAB
|
Until advised by.........
|
ULR
|
Ultra long range
|
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UAC
|
Upper area control centre
|
UNA
|
Unable
|
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UAR
|
Upper air route
|
UNL
|
Unlimited
|
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UFN
|
Until further notice
|
UNREL
|
Unreliable
|
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UHF
|
Ultra high frequency (300 to 3000 mhz )
|
U/S
|
Unserviceable
|
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UIC
|
Upper information centre
|
UTA
|
Upper control area
|
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UIR
|
Upper flight information region
|
UTC
|
Coordinated universal time
|
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V
|
|
VA
|
Volcanic ash
|
VLR
|
Very long range
|
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VAC
|
Visual approach chart
|
VMC
|
Visual meteorological conditions
|
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VAR
|
Visual aural radio range /magnetic variation
|
VOLMET
|
Met. information for aircraft in flight
|
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VASIS
|
Visual approach slope indicator system
|
VOR
|
VHF omni directional radio range
|
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VCY
|
Vicinity
|
VORTAC
|
VOR and TACAN combination
|
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VDF
|
Very high frequency direction finding station
|
VOT
|
VOR airborne equipment test facility
|
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VER
|
Vertical
|
VRB
|
Variable
|
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VFR
|
Visual flight rules
|
VSA
|
By visual reference to the ground
|
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VHF
|
Very high frequency (30 to 300 mhz )
|
VSP
|
Vertical speed
|
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VIP
|
Very important person
|
VTOL
|
Vertical take-off and landing
|
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VIS
|
Visibility
|
VVIP*
|
Very very important person
|
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VLF
|
Very low frequency (3 to 30 khz )
|
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W
|
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W & G
|
White & Green
|
WILCO
|
Will comply
|
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W
|
West or western latitude or white
|
WIP
|
Work in progress
|
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WAC
|
World Aeronautical chart ICAO 1:1000000
|
WKN
|
Weaken or weakening
|
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WBAR
|
Wing bar lights
|
WNW
|
West north west
|
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WDI
|
Wind direction indicator
|
WPT
|
Way point
|
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WDSPR
|
Widespread
|
WRNG
|
Warning
|
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WED
|
Wednesday
|
WS
|
Wind shear
|
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WEF
|
With effect from or effective from
|
WSW
|
West south west
|
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WI
|
With in
|
W/S
|
Wingspan
|
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WID
|
Width
|
WT
|
Weight
|
|
WIE
|
With immediate effect or effective immediately
|
WTSPT
|
Waterspout
|
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|
y
|
WX
|
Weather
|
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X
|
|
X
|
Cross
|
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XBAR
|
Cross bar (of approach lighting system )
|
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XNG
|
Crossing
|
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XS
|
Atmospherics
|
|
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Y
|
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Y
|
Yellow
|
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YCZ
|
Yellow caution zone (runway lighting )
|
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YR
|
Yours
|
|
|