|
|
|
|
|
A
|
Amber |
|
AAA*
|
(or AAB, AAC … etc., in sequence) Amended meteorological message (message type designator) |
|
AA
|
All after |
|
A/A
|
Air –to-air |
|
AAD
|
Assigned altitude deviation |
|
AAL
|
Above aerodrome level |
|
AB
|
All before |
|
ABI
|
Advance boundary information |
|
ABM
|
Abeam |
|
ABN
|
Aerodrome beacon |
|
ABT
|
About |
|
ABV
|
Above |
|
AC
|
Altocumulus |
|
ACARS
|
(to be pronounced “AY-CARS”) Aircraft communication addressing and reporting system |
|
ACAS
|
Airborne collision avoidance system |
|
ACC
|
Area control centre or area control |
|
ACCID
|
Notification of an aircraft accident |
|
ACFT
|
Aircraft |
|
ACK
|
Acknowledge |
|
ACL
|
Altimeter check location |
|
ACN
|
Aircraft classification number |
|
ACP
|
Acceptance (message type designator) |
|
ACPT
|
Accept or accepted |
|
ACT
|
Active or activated or activity |
|
AD
|
Aerodrome |
|
ADA
|
Advisory area |
|
ADC
|
Aerodrome chart |
|
ADDN
|
Addition or additional |
|
ADF
|
Automatic direction-finding equipment |
|
ADIZ
|
(to be pronounced “AY-DIZ”) Air defense identification zone |
|
ADJ
|
Adjacent |
|
ADO
|
Aerodrome office (specify service) |
|
ADR
|
Advisory route |
|
|
ADS
|
Automatic dependent surveillance |
|
ADSU
|
Automatic dependent surveillance unit |
|
ADVS
|
Advisory service |
|
ADZ
|
Advise |
|
AES
|
Aircraft earth station |
|
AFC
|
Area forecast centre |
|
AFIL
|
Flight plan filed in the air |
|
AFIS
|
Aerodrome flight information service |
|
AFM
|
Yes or affirm or affirmative or that is correct |
|
AFS
|
Aeronautical fixed service |
|
AFT
|
After...(time or place) |
|
AFTN
|
Aeronautical fixed telecommunication network |
|
A/G
|
Air-to-ground |
|
AGA
|
Aerodromes, air routes and ground aids |
|
AGL
|
Above ground level |
|
AGN
|
Again |
|
AIC
|
Aeronautical information Circular |
|
AIDC
|
Air traffic services inter-facility data communication |
|
AIP
|
Aeronautical Information Publication |
|
AIRAC
|
Aeronautical Information Regulation and Control |
|
AIREP
|
Air-report |
|
AIRMET
|
Information concerning en-route weather phenomena which may affect the safety of low-level aircraft operations |
|
AIS
|
Aeronautical Information Services |
|
ALA
|
Alighting area |
|
ALERFA
|
Alert phase |
|
ALR
|
Alerting (message type designator) |
|
ALRS
|
Alerting service |
|
ALS
|
Approach lighting system |
|
ALT
|
Altitude |
|
ALTN
|
Alternate (aerodrome) |
|
ALTN
|
Alternate or alternating (light alternates in colour) |
|
AMA
|
Area minimum altitude |
|
AMD
|
Amend or amended (used to indicate amended meteorological message; message type designator) |
|
AMDT
|
Amendment (AIP amendment) |
|
AMS
|
Aeronautical mobile service |
|
AMSL
|
Above mean sea level |
|
AMSS
|
Aeronautical mobile satellite service |
|
|
AMU
|
Apron Management Unit |
|
ANC
|
Aeronautical chart – 1:500 000 (followed by name/title) |
|
ANCS
|
Aeronautical navigation chart–small scale |
|
ANS
|
Answer |
|
AOC
|
Aerodrome obstacle chart (follow by type And name/title) |
|
AP
|
Airport |
|
APAPI
|
(to be pronounced “A-PAPI”) Abbreviated precision approach path indicator |
|
APCH
|
Approach |
|
APDC
|
Aircraft parking/docking chart (followed by name/title) |
|
APN
|
Apron |
|
APP
|
Approach control office; approach control or approach control service |
|
APR
|
April |
|
APRX
|
Approximate or approximately |
|
APSG
|
After passing |
|
APV
|
Approve; approved or approval |
|
ARC
|
Area chart |
|
ARFOR
|
Area forecast (in aeronautical meteorological code) |
|
ARMET
|
Forecast upper wind and temperature at specified points (in aeronautical meteorological code) |
|
ARNG
|
Arrange |
|
ARO
|
Air traffic services reporting office |
|
ARP
|
Aerodrome reference point |
|
ARP
|
Air-report (message type designator) |
|
ARQ
|
Automatic error correction |
|
ARR
|
Arrival |
|
ARS
|
Special air-report (message type designator) |
|
ARST
|
Arresting [specify (part of) aircraft Arresting equipment] |
|
AS
|
Altostratus |
|
ASC
|
Ascend or ascending to |
|
ASDA
|
Accelerate-stop distance available |
|
ASE
|
Altimetry system error |
|
ASPH
|
Asphalt |
|
ASR
|
Approach surveillance radar |
|
ASSR
|
Approach secondary surveillance radar |
|
AT...
|
At (followed by time at which weather change is forecast to occur) |
|
ATA
|
Actual time of arrival |
|
|
ATC
|
Air traffic control (in general) |
|
ATCC
|
Air traffic control center |
|
ATCTC
|
Air traffic control training centre |
|
ATCU
|
Air traffic control unit |
|
ATD
|
Actual time of departure |
|
ATFM
|
Air traffic flow management |
|
ATM
|
Air traffic management |
|
ATIS
|
Automatic terminal information service |
|
ATM
|
Air traffic management |
|
ATN
|
Aeronautical telecommunication network |
|
ATP
|
At … (time or place) |
|
ATRS
|
ARINC trunked radio service |
|
ATS
|
Air traffic services |
|
ATTN
|
Attention |
|
ATU
|
Aviation terminal use |
|
AT-VASIS
|
(to be pronounced “AY-TEE-VASIS) Abbreviated T visual approach slope indicator system |
|
ATZ
|
Aerodrome traffic zone |
|
AUA
|
Aruba (IATA code) |
|
AUG
|
August |
|
AUTH
|
Authorized or authorization |
|
AUW
|
All up weight |
|
AUX
|
Auxiliary |
|
AVASIS
|
(to be pronounced “AY-VASIS”) Abbreviated visual approach slope indicator system |
|
AVBL
|
Available or availability |
|
AVG
|
Average |
|
AVGAS
|
Aviation gasoline |
|
AVPAC
|
Aviation VHF Packet communications |
|
AVTUR
|
Aviation turbine fuel |
|
AWD
|
ARINC weather database |
|
AWSS
|
ARINC weather satellite service |
|
AWTA
|
Advise at what time able |
|
AWY
|
Airway |
|
AZM
|
Azimuth |
|
|
|
|
B
|
Blue |
|
BA
|
Braking action |
|
BASE
|
Cloud base |
|
BB
|
Base band |
|
BCFG
|
Fog patches |
|
BCN
|
Beacon (aeronautical ground light) |
|
BCST
|
Broadcast |
|
BDRY
|
Boundary |
|
BECMG
|
Becoming |
|
BER
|
Basic encoding rules |
|
BES Island
|
Bonaire, St. Eustatius and Saba |
|
BFR
|
Before |
|
BK
|
Signal used to interrupt a transmission in progress |
|
BKN
|
Broken |
|
BL …
|
Blowing (followed by DU=dust, SA=sand or SN=snow) |
|
BLDG
|
Building |
|
BLO
|
Below clouds |
|
BLSN
|
Blowing snow |
|
BLW
|
Below .... |
|
BN
|
All between … and … |
|
BNS
|
Boundary notification system |
|
BOD
|
Board of directors |
|
BOMB
|
Bombing |
|
BON
|
Bonaire (IATA code) |
|
BPS
|
Bits per second |
|
BQ
|
A reply to an RQ |
|
BR
|
Mist |
|
BRF
|
Short (used to indicate the type of approach desired or required) |
|
BRG
|
Bearing |
|
BRKG
|
Braking |
|
BS
|
Commercial broadcasting station |
|
BTL
|
Between layers |
|
BTN
|
Between |
|
BUFR
|
Binary universal form for data representation |
|
|
|
|
C
|
Centre (runway identification) |
|
C
|
Degrees Celsius (Centigrade) |
|
CAA
|
Civil aviation authority |
|
CAD
|
Civil aviation department |
|
CAT
|
Category |
|
CAT
|
Clear air turbulence |
|
CATIS
|
Computerized ATIS (voice & data) |
|
CAVOK
|
(to be pronounced “KAV-OH-KAY”) Visibility, cloud and present weather better than prescribed values or conditions |
|
CB
|
(to be pronounced “CEE BEE”) cumulonimbus |
|
CC
|
Cirrocumulus |
|
CCA
|
(or CCB, CCC … etc., in sequence) Corrected meteorological message (message type designator) |
|
CCS
|
Cabin communication system |
|
CD
|
Candela (candle light hour) |
|
CDN
|
Co-ordination (message type designator) |
|
CEO
|
Chief executive officer |
|
CF
|
Change frequency to … |
|
CFO
|
Chief financial officer |
|
CFM
|
Confirm or I confirm |
|
CFT
|
Confirm or correct transmission |
|
CGL
|
Circling guidance lights |
|
CH
|
Channel |
|
CHG
|
Modification (message type designator) |
|
CI
|
Cirrus |
|
CIDIN
|
Common ICAO data interchange network |
|
CIT
|
Near or over large towns |
|
CIV
|
Civil |
|
CK
|
Check |
|
CL
|
Centre line |
|
CLA
|
Clear type of ice formation |
|
CLBR
|
Calibration |
|
CLD
|
Cloud |
|
CLG
|
Calling |
|
CLR
|
Clear(s) or cleared to... or clearance |
|
CLSD
|
Close or closed or closing |
|
CM
|
Centimetre |
|
CMB
|
Climb or climbing to |
|
CMU
|
Communications management unit |
|
CMPL
|
Complete; completion or completed |
|
CNL
|
Cancel or cancelled |
|
|
CNL
|
Flight plan cancellation (message type designator) |
|
CNS
|
Communications, navigation and surveillance |
|
COM
|
Communications |
|
COMSAT
|
Communication satellite corporation |
|
CONC
|
Concrete |
|
COND
|
Condition |
|
CONS
|
Continuous |
|
CONST
|
Construction or constructed |
|
CONT
|
Continue(s) or continued |
|
COO
|
Chief operating officer |
|
COOR
|
Coordinate or coordination |
|
COORD
|
Coordinates |
|
COP
|
Change-over point |
|
COR
|
Correct or correction or corrected (used to indicate corrected meteorological message type designator) |
|
COT
|
At the coast |
|
COV
|
Cover; covered or covering |
|
CP
|
General call to two or more specified stations |
|
CPDLC
|
Controller-pilot data link communications |
|
CPL
|
Current flight plan (message type designator) |
|
CPU
|
Central procession unit |
|
CQ
|
General call to all stations |
|
CRC
|
Cyclic redundancy check |
|
CRZ
|
Cruise |
|
CS
|
Cirrostratus |
|
CS
|
Call sign (used to request a call sign) |
|
CTA
|
Control area |
|
CTAM
|
Climb to and maintain |
|
CTC
|
Contact |
|
CTL
|
Control |
|
CTN
|
Caution |
|
CTR
|
Control zone |
|
CU
|
Cumulus |
|
CUF
|
Cumuliform |
|
CUR
|
Curaçao (IATA code) |
|
CUST
|
Customs |
|
CW
|
Continuous wave |
|
CWY
|
Clearway |
|
|
|
|
D
|
Downward (related to RVR) |
|
D …
|
Danger area (followed by identification) |
|
DA
|
Decision altitude |
|
D-ATIS
|
(to be pronounced “DEE-AITS”) Data link automatic terminal information service |
|
DB
|
Decibel |
|
DBW
|
Decibel-Watts |
|
DCA
|
Director of Civil Aviation |
|
DCD
|
Double channel duplex |
|
DCKG
|
Docking |
|
DCS
|
Double channel simplex |
|
DCT
|
Direct (in relation to flight plan clearances and type of approach) |
|
DEC
|
December |
|
DEG
|
Degrees |
|
DENEB
|
Fog dispersal operations |
|
DEP
|
Depart or departure (message type designator) |
|
DES
|
Descend to or descending to |
|
DEST
|
Destination |
|
DESTRESFA
|
Distress phase |
|
DFDR
|
Digital flight data recorder |
|
DFTI
|
Distance from touchdown indicator |
|
DGNSS
|
Differential Global Navigation Satellite System |
|
DH
|
Decision height |
|
DIF
|
Diffuse |
|
DIST
|
Distance |
|
DIV
|
Divert or diverting |
|
DLA
|
Delayed; delay (message type designator) |
|
DME
|
Distance measuring equipment |
|
DNG
|
Danger or dangerous |
|
DP
|
Dew point temperature |
|
DPT
|
Depth |
|
DR
|
Dead reckoning |
|
DRG
|
During |
|
DRSN
|
Low drifting snow |
|
DS
|
Duststorm |
|
|
|
|
E
|
East or eastern longitude |
|
EAT
|
Expected approach time |
|
EB
|
Eastbound |
|
EEE
|
Error |
|
EET
|
Estimated elapse time |
|
EFC
|
Expect further clearance |
|
EHF
|
Extremely high frequency [30 000 to 300 000 MHz] |
|
ELBA
|
Emergency location beacon (aircraft) |
|
ELEV
|
Elevation |
|
ELR
|
Extra long range |
|
ELT
|
Emergency locator transmitter |
|
EM
|
Emission |
|
EMBD
|
Embedded in a layer (to indicate cumulo-nimbus embedded in layers of other clouds) |
|
EMERG
|
Emergency |
|
END
|
End; stop-end (related to RVR) |
|
ENE
|
East north east |
|
ENG
|
Engine |
|
ENR
|
En route |
|
ENRC
|
En route chart |
|
EOBT
|
Estimated off-block time |
|
EQPT
|
Equipment |
|
|
ER
|
Here… or herewith |
|
ESE
|
East south east |
|
EST
|
Estimated; estimate (message type designator) |
|
ETA
|
Estimated time of arrival or estimating arrival |
|
ETD
|
Estimated time of departure or estimating departure |
|
ETO
|
Estimated time over significant point |
|
EUX
|
St. Eustatius (IATA code) |
|
EV
|
Every |
|
EXC
|
Except |
|
EXER
|
Exercise(s) or exercising; to exercise |
|
EXP
|
Expect or expecting; to expect |
|
EXT
|
Extend or extending |
|
|
|
|
F
|
Fixed |
|
F
|
Degrees Fahrenheit |
|
FAA
|
Federal Aviation Administration |
|
FAC
|
Facilities |
|
FAF
|
Final approach fix |
|
FAL
|
Facilitation of international air transport |
|
FANS
|
Future air navigation systems |
|
FAP
|
Final approach point |
|
FATO
|
Final approach and take-off area |
|
FBL
|
Light (used to indicate the intensity of weather phenomena, interference or static reports, e.g. FBL RA=light rain) |
|
FC
|
Funnel cloud (tornado or water spout) |
|
FCST
|
Forecast |
|
FCT
|
Friction coefficient |
|
FEB
|
February |
|
FEW
|
Few |
|
FG
|
Fog |
|
FIC
|
Flight information centre |
|
FIR
|
Flight information region |
|
FIS
|
Flight information service |
|
FISA
|
Automated flight Information service |
|
FL
|
Flight level |
|
FLG
|
Flashing |
|
FLR
|
Flare(s) |
|
|
FLT
|
Flight |
|
FLTCK
|
Flight check |
|
FLUC
|
Fluctuating; fluctuated or fluctuation |
|
FLW
|
Follow(s) or following |
|
FLY
|
Fly or flying |
|
FM
|
From |
|
FM...
|
From (followed by time weather change is forecast to begin) |
|
FMU
|
Flow management unit |
|
FNA
|
Final approach |
|
FPL
|
Filed flight plan (message type designator) |
|
FPM
|
Feet per minute |
|
FR
|
Fuel remaining |
|
FPR
|
flight plan route |
|
FREQ
|
Frequency |
|
FRI
|
Friday |
|
FRNG
|
Firing |
|
FRONT
|
Front (relating to weather) |
|
FRQ
|
Frequent |
|
FSL
|
Full stop landing |
|
FSS
|
Flight service station |
|
FST
|
First |
|
FT
|
Feet (dimensional unit) |
|
FU
|
Smoke |
|
FZ
|
Freezing |
|
FZDZ
|
Freezing drizzle |
|
FZFG
|
Freezing fog |
|
FZRA
|
Freezing rain |
|
|
|
|
G
|
Green |
|
GA
|
Go ahead |
|
G/A
|
Ground-to-air |
|
G/A/G
|
Ground-to-air and air-to-ground |
|
GAMET
|
Area forecast for low-level flights |
|
GCA
|
Ground controlled approach system or ground controlled approach |
|
GEN
|
General |
|
GEO
|
Geographic or true |
|
|
|
|
H24
|
Continuous day and night service |
|
HAPI
|
Helicopter approach path indicator |
|
HBN
|
Hazard beacon |
|
HDF
|
High frequency direction finding station |
|
HDG
|
Heading |
|
HEL
|
Helicopter |
|
HF
|
High frequency (3 000 to 30 000 KHz) |
|
HGT
|
Height or height above |
|
HJ
|
Sunrise to sunset |
|
HLDG
|
Holding |
|
HN
|
Sunset to sunrise |
|
HO
|
Service available to meet operational requirements |
|
HOL
|
Holiday |
|
HOSP
|
Hospital aircraft |
|
HPA
|
Hectopascal |
|
HR
|
Hours |
|
HS
|
Service available during hours of scheduled operations |
|
HURCN
|
Hurricane |
|
|
HVDF
|
High and very high frequency direction finding stations (at the same location) |
|
HVY
|
Heavy (used to indicate the intensity of weather phenomena, e.g. HVY RA = heavy rain) |
|
HVY
|
Heavy |
|
HX
|
No specific working hours |
|
HZ
|
Haze |
|
Hz
|
Hertz (cycle per second) |
|
|
|
|
IAC
|
Instrument approach chart |
|
IAF
|
Initial approach fix |
|
IAO
|
In and out of clouds |
|
IAR
|
Intersection of air routes |
|
IAS
|
Indicated air speed |
|
IBN
|
Identification beacon |
|
IC
|
Ice crystals |
|
ICE
|
Icing |
|
ID
|
Identifier or identify |
|
IDENT
|
Identification |
|
IF
|
Intermediate approach fix |
|
IFF
|
Identification friend or foe |
|
IFR
|
Instrument flight rules |
|
IGA
|
International General Aviation |
|
ILS
|
Instrument landing system |
|
IM
|
Inner marker |
|
IMC
|
Instrument meteorological conditions |
|
IMG
|
Immigration |
|
IMPR
|
Improve or improving |
|
IMT
|
immediate or immediately |
|
INA
|
Initial approach |
|
INBD
|
Inbound |
|
INC
|
In cloud |
|
INCERFA
|
Uncertainty phase |
|
INFO
|
Information |
|
INOP
|
Inoperative |
|
INP
|
If not possible |
|
INPR
|
In progress |
|
INS
|
Inches |
|
INS
|
Inertial navigation system |
|
INSTL
|
Install or installed or installation |
|
INSTR
|
Instrument |
|
INT
|
Intersection |
|
INTER
|
intermittent |
|
INTL
|
International |
|
INTRG
|
Interrogator |
|
INTRP
|
Interrupt or interruption or interrupted |
|
INTSF
|
Intensify or intensifying |
|
INTST
|
Intensity |
|
IR
|
Ice on runway |
|
ISA
|
International standard atmosphere |
|
ISB
|
Independent sideband |
|
ISOL
|
Isolated |
|
I/V
|
Instrument / visual |
|
|
|
|
JAN
|
January |
|
JTST
|
Jet stream |
|
JUL
|
July |
|
JUN
|
June |
|
|
|
|
K
|
Invitation to transmit |
|
KA
|
Start-of message signal |
|
KBITS
|
Kilobits |
|
KG
|
Kilograms |
|
KHz
|
Kilohertz |
|
KM
|
Kilomtres |
|
KMH
|
Kilometres per hour |
|
KPA
|
Kilopascal |
|
KT
|
Knots |
|
KW
|
Kilowatts |
|
|
|
|
L
|
Left (runway identification) |
|
L
|
Locator (see LM, LO) |
|
LAM
|
Logical acknowledgement (message type designator) |
|
LAN
|
Inland |
|
LAT
|
Latitude |
|
LB
|
Pounds |
|
LCN
|
Load classification number |
|
LDA
|
Landing distance available |
|
LDAH
|
Landing distance available, helicopter |
|
LDG
|
Landing |
|
LDI
|
Landing direction indicator |
|
LEFT
|
Left (direction of turn) |
|
LEN
|
Length |
|
LF
|
Low frequency (30 to 300 kHz) |
|
LGT
|
Light or lighting |
|
LGTD
|
Lighted |
|
LIH
|
Light intensity high |
|
LIL
|
Light intensity low |
|
LIM
|
Light intensity medium |
|
LLZ
|
Localizer |
|
LM
|
Locator, middle |
|
LMT
|
Local mean time |
|
LNAV
|
Lateral navigation |
|
LNG
|
Long (used to indicate the type of approach desired or required) |
|
LO
|
Locator, outer |
|
LO
|
Connect me to a perforator |
|
LOC
|
Local or locally or location or located |
|
LONG
|
Longitude |
|
LORAN
|
LORAN (long range air navigation system) |
|
LOS*
|
Line-of-sight |
|
LR
|
The last message received by me was…(to be used in AFS as a |
|
LRG
|
Long range |
|
LS
|
The last message sent by me was…(to be used in AFS as a procedure signal) |
|
LSQ
|
Line squall |
|
LTD
|
Limited |
|
LTT
|
Landline teletypewriter |
|
LV
|
Light and variable (relating to wind) |
|
LVE
|
Leave or leaving |
|
LVL
|
Level |
|
LYR
|
Layer or layered |
|
|
|
|
M
|
Mach number (followed by figures) |
|
M
|
Metres (preceded by figures) |
|
MAA
|
Maximum authorized altitude |
|
MAG
|
Magnetic |
|
MAINT
|
Maintenance |
|
MAP
|
Aeronautical maps and charts |
|
MAPT
|
Missed approach point |
|
MAR
|
At sea |
|
MAR
|
March |
|
MAS
|
Manual Al simplex |
|
MAX
|
Maximum |
|
MAY
|
May |
|
MB
|
Millibars |
|
MBST
|
Microburst |
|
MCA
|
Minimum crossing altitude |
|
MCW
|
Modulated continuous wave |
|
MDA
|
Minimum descent altitude |
|
MDF
|
Medium frequency direction finding station |
|
MDH
|
Minimum descent height |
|
MEA
|
Minimum en-route altitude |
|
MEHT
|
Minimum eye height above threshold (for visual approach slope indicator systems) |
|
MET
|
Meteorological or meteorology |
|
METAR
|
Aviation routine weather report (in aeronautical meteorological code) |
|
MF
|
Medium frequency (300 to 3 000 kHz) |
|
MHDF
|
Medium and high frequency direction finding stations (at the same location) |
|
MHVDF
|
Medium, high and very high frequency direction finding station (at the same location) |
|
MHZ
|
Megahertz |
|
MID
|
Mid-point (related to RVR) |
|
MIFG
|
Shallow fog |
|
MIL
|
Military |
|
MIN
|
Minutes |
|
MIS
|
Missing ….(transmission identification) |
|
MKR
|
Marker radio beacon |
|
MLS
|
Microwave landing system |
|
MM
|
Middle marker |
|
MMF
|
Middle marker fix |
|
MNM
|
Minimum |
|
MNPS
|
Minimum navigation performance specifications |
|
MNT
|
Monitor; monitoring or monitored |
|
MNTN
|
Maintain |
|
MOA
|
Military operating area |
|
MOC
|
Minimum obstacle clearance (required) |
|
MOD
|
Moderate (used to indicate the intensity of weather phenomena, interference or static reports ) |
|
MON
|
Monday |
|
MOPS
|
Minimum Operational Performance Standards |
|
MOTNE
|
Meteorological Operational Telecommunications Network Europe |
|
MOV
|
Move or moving or movement |
|
MPH
|
Statue miles per hour |
|
MPS
|
Metres per second |
|
MRA
|
Minimum reception altitude |
|
MRG
|
Medium range |
|
MRP
|
ATS/MET reporting point |
|
MS
|
Minus |
|
MSA
|
Minimum sector altitude |
|
MSG
|
Message |
|
MSL
|
Mean sea level |
|
MSR
|
Message… (transmission identification) has been misrouted (to be used in AFS as a procedure signal) |
|
MSSR
|
Monopulse secondary surveillance radar |
|
MT
|
Mountain |
|
MTU
|
Metric units |
|
MTW
|
Mountain waves |
|
MVDF
|
Medium and very high frequency direction finding stations (at the same location) |
|
MWO
|
Meteorological watch office |
|
MX
|
Mixed type of ice information (white and clear) |
|
|
|
|
N
|
North or northern latitude |
|
N
|
No distinct tendency (in RVR during previous 10 minutes) |
|
NASC
|
National AIS system centre |
|
NAM
|
North American Area |
|
NAT
|
North Atlantic |
|
NAV
|
Navigation |
|
NB
|
Northbound |
|
NBFR
|
Not before |
|
NC
|
No change |
|
NDB
|
Non-directional radio beacon |
|
NE
|
North-east |
|
NEB
|
North-eastbound |
|
NEG
|
No or negative or permission not granted or that is not correct |
|
NEH
|
I am connecting you to a station which will accept traffic for the station you requested |
|
NGT
|
Night |
|
NIL
|
None or nothing to send to you |
|
NINST
|
Non-instrument runway |
|
NM
|
Nautical miles |
|
NML
|
Normal |
|
NNE
|
North north east |
|
NNW
|
North north west |
|
NOF
|
International 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 |
|
NOV
|
November |
|
NPA
|
Non-precision approach |
|
NR
|
Number |
|
NRH
|
No reply heard |
|
NS
|
Nimbostratus |
|
NSC
|
Nil significant cloud |
|
NSW
|
Nil significant weather |
|
NTL
|
National |
|
NTZ
|
No transgression zone |
|
NW
|
North-west |
|
NWB
|
North-west bound |
|
NXT
|
Next |
|
|
|
|
OAC
|
Oceanic area control centre |
|
OAS
|
Obstacle assessment surface |
|
OBS
|
Observe or observed or observation |
|
OBSC
|
Obscure or obscured or obscuring |
|
OBST
|
Obstacle |
|
OCA
|
Obstacle clearance altitude |
|
OCA
|
Oceanic control area |
|
OCC
|
Occulting (light) |
|
OCC
|
The line is engaged |
|
OCH
|
Obstacle clearance height |
|
OCL
|
Obstacle clearance limit |
|
OCNL
|
Occasional or occasionally |
|
OCS
|
Obstacle clearance surface |
|
OCT
|
October |
|
OFZ
|
Obstacle free zone |
|
OGD
|
Originate (to be used in AFS as a procedure signal) |
|
OHD
|
Overhead |
|
OK
|
We agree or it is correct |
|
OLDI
|
On-line data interchange |
|
OM
|
Outer marker |
|
OMF
|
Outer marker fix |
|
OPA
|
Opaque, white type of ice formation |
|
OPC
|
The control indicated is operational control |
|
OPMET
|
Operational meteorological (information) |
|
OPN
|
Open or opening or opened |
|
OPR
|
Operator or operate or operative or operating or operational |
|
OPS
|
Operations |
|
O/R
|
On request |
|
ORD
|
Indication of an order |
|
OSV
|
Ocean station vessel |
|
OTLK
|
Outlook (used in SIGMET messages for volcanic ash and tropical cyclones) |
|
OTP
|
On top |
|
OTS
|
Organized track system |
|
OUBD
|
Outbound |
|
OVC
|
Overcast |
|
|
|
|
P...
|
Prohibited area (followed by identification) |
|
PA1
|
Precision approach runway category I |
|
PALS
|
Precision approach lighting system |
|
PANS
|
Procedures for air navigation services |
|
PAPI
|
Precision approach path indicator |
|
PAR
|
Precision approach radar |
|
PARL
|
Parallel |
|
PAX
|
Passenger(s) |
|
PCD
|
Proceed or proceeding |
|
PDG
|
Procedure design gradient |
|
PCN
|
Pavement classification number |
|
PE
|
Ice pellets |
|
PER
|
Performance |
|
PERM
|
Permanent |
|
PJE
|
Parachute jumping exercises |
|
PLA
|
Practice low approach |
|
PLN
|
Flight plan |
|
PLVL
|
Present level |
|
PN
|
Prior notice required |
|
PNR
|
Point of no return |
|
PO
|
Dust/sand whirls (dust devils) |
|
POB
|
Persons on board |
|
POS
|
Possible |
|
PPI
|
Plan position indicator |
|
PPR
|
Prior permission required |
|
PPSN
|
Present position |
|
PRFG
|
Aerodrome partially covered by fog |
|
PRI
|
Primary |
|
PRKG
|
Parking |
|
PROB
|
Probability |
|
PROC
|
Procedure |
|
PROV
|
Provisional |
|
PS
|
Plus |
|
PSG
|
Passing |
|
PSN
|
Position |
|
PSP
|
Pierced steel plank |
|
PTN
|
Procedure turn |
|
PTS
|
Polar track structure |
|
PWR
|
Power |
|
|
|
|
QBI
|
Compulsory IFR flight |
|
QDM
|
Magnetic heading (zero wind) |
|
QDR
|
Magnetic bearing |
|
QFE
|
Atmospheric pressure at aerodrome elevation (or at runway threshold) |
|
QFU
|
Magnetic orientation of runway |
|
QNH
|
Altimeter sub-scale setting to obtain elevation when on the ground |
|
QTE
|
True bearing |
|
QUAD
|
Quadrant |
|
|
|
|
R...
|
Restricted area (followed by identification) |
|
R
|
Right (runway identification) |
|
R
|
Red |
|
RA
|
Rain |
|
RAC
|
Rules of the air and air traffic services |
|
RCC
|
Rescue co-ordination centre |
|
RCF
|
Radio communication failure (message type designator) |
|
RCL
|
Runway centre line |
|
RCLL
|
Runway centre line light(s) |
|
RDH
|
Reference datum height (for ILS) |
|
RDO
|
Radio |
|
RE....
|
Recent (used to qualify weather phenomena, e.g. RERA=recent rain) |
|
REC
|
Receive or receiver |
|
REDL
|
Runway edge light(s) |
|
REF
|
Reference to .. or refer to ... |
|
REG
|
Registration |
|
RENL
|
Runway end light(s) |
|
REP
|
Report or reporting or reporting point |
|
REQ
|
Request or requested |
|
RESA
|
Runway end safety area |
|
RLCE
|
Request level change en-route |
|
RMK
|
Remark |
|
RNAV
|
(to be pronounced "AR-NAV") Area navigation |
|
RNG
|
Radio range |
|
RNP
|
Required navigation performance |
|
ROC
|
Rate of climb |
|
ROFOR
|
Route forecast (in aeronautical meteorological code) |
|
RPL
|
Repetitive flight plan |
|
RQP
|
Request flight plan (message type designator) |
|
RQS
|
Request supplementary flight plan (message type designator) |
|
RRA
|
(or RRB, RRC ... etc., in sequence) Delayed meteorological message (message type designator) |
|
RSR
|
En-route surveillance radar |
|
RSSR
|
En-route secondary surveillance radar |
|
RTD
|
Delayed (used to indicate delayed meteorological message; message type designator) |
|
RTE
|
Route |
|
RTF
|
Radiotelephone |
|
RV
|
Rescue vessel |
|
RVR
|
Runway visual range |
|
RWY
|
Runway |
|
|
|
|
S
|
South or southern latitude |
|
SA
|
Sand |
|
SAB
|
Saba (IATA code) |
|
SAR
|
Search and rescue |
|
SARPS
|
Standards and Recommended Practices (ICAO) |
|
SAT
|
Saturday |
|
SATCOM
|
Satellite communication |
|
SB
|
Southbound |
|
SC
|
Stratocumulus |
|
SCT
|
Scattered |
|
SDBY
|
Stand by |
|
SE
|
South-east |
|
SEA*
|
South East Asia |
|
SEB
|
South-eastbound |
|
SEC
|
Seconds |
|
SECT
|
Sector |
|
SELCAL
|
Selective calling system |
|
SEP
|
September |
|
SER
|
Service or servicing or served |
|
SEV
|
Severe (used e.g. to qualify icing and turbulence reports) |
|
SFC
|
Surface |
|
SG
|
Snow grains |
|
SH...
|
Showers (followed by RA=rain, SN=snow, PE=ice pellets, GR=hail, GS=small hail and/or snow pellets or combinations thereof, e.g. SHRASN=showers of rain and snow) |
|
SID
|
Standard Instrument Departure |
|
SIGMET
|
Information concerning en-route weather phenomena which may affect the safety of aircraft operations |
|
SIGWX
|
Significant weather |
|
SKARA*
|
Shek Kong Aerodrome Reporting Area |
|
SKC
|
Sky clear |
|
SKED
|
Schedule or scheduled |
|
SLA
|
Service Level Agreement |
|
SMR
|
Surface movement radar |
|
SN
|
Snow |
|
SNOWTAM
|
A special series NOTAM notifying the presence or removal of hazardous conditions due to snow, ice, slush and ice on the movement area, by means of a special format |
|
SPECI
|
Aviation selected special weather report (in aeronautical |
|
SPECIAL
|
Special meteorological report (in abbreviated plain language) |
|
SPL
|
Supplementary flight plan(message type designator) |
|
SQ
|
Squall |
|
SR
|
Sunrise |
|
SRA
|
Surveillance radar approach |
|
SRE
|
Surveillance radar element of precision approach radar system |
|
SS
|
Sandstorm |
|
SS
|
Sunset |
|
SSB
|
Single sideband |
|
SSE
|
South south east |
|
SSR
|
Secondary surveillance radar |
|
SST
|
Supersonic transport |
|
SSW
|
South south west |
|
ST
|
Stratus |
|
STA
|
Straight in approach |
|
STAR
|
Standard Arrival Route |
|
STD
|
Standard |
|
STF
|
Stratiform |
|
STN
|
Station |
|
STS
|
Status |
|
STWL
|
Stopway light(s) |
|
SUN
|
Sunday |
|
SUP
|
Supplement (AIP Supplement) |
|
SUPPS
|
Regional supplementary procedures |
|
SVFR*
|
Special visual flight rules |
|
SW
|
South-west |
|
SWB
|
South-westbound |
|
SWY
|
Stopway |
|
SXM
|
St. Maarten (IATA code) |
|
|
|
|
°T*
|
Degree(s) True |
|
TA
|
Transition altitude |
|
TAF
|
Aerodrome forecast |
|
TAR
|
Terminal area surveillance radar |
|
TAS
|
True airspeed |
|
TC
|
Tropical cyclone |
|
TCH*
|
Threshold crossing height |
|
TCU
|
Towering cumulus |
|
TDWR*
|
Terminal Doppler Weather Radar |
|
TDZ
|
Touchdown zone |
|
TEL
|
Telephone |
|
TEMP*
|
Temperature |
|
TEMPO
|
Temporary or temporarily |
|
TEND
|
Trend forecast |
|
TFC
|
Traffic |
|
THR
|
Threshold |
|
THRU
|
Through |
|
THU
|
Thursday |
|
TIL
|
Until |
|
TL...
|
Till (followed by time by which weather change is forecast to end) |
|
TMA
|
Terminal control area |
|
TO
|
To ... (place) |
|
TNCB
|
Bonaire International Airport - FLAMINGO |
|
TNCC
|
Curaçao International Airport - HATO |
|
TNCE
|
St. Eustatius F.D. Roosevelt Airport |
|
TNCM
|
St. Maarten Princess Juliana International Airport |
|
TNCS
|
Saba Juancho E. Yrausquin Airport |
|
TODA
|
Take-off distance available |
|
TORA
|
Take-off run available |
|
TR
|
Track |
|
TRA
|
Temporary reserved airspace |
|
TRANS
|
Transmits or transmitter |
|
TRL
|
Transition level |
|
TROP
|
Tropopause |
|
TS
|
Thunderstorm (in aerodrome reports and forecasts, TS used alone means thunder heard but no precipitation at the aerodrome) Thunderstorm (followed by RA=RAIN, SN=snow, PE=ice pellets, GR=hail, GS=small hail and/or snow pellets or combinations thereof, e.g. TSRASN=thunderstorm with rain and snow) |
|
TS...
|
Terminal surveillance radar |
|
TSR*
|
Terminal secondary surveillance radar |
|
TSSR*
|
Teletypewriter |
|
TT
|
Tuesday |
|
TUE
|
Turbulence |
|
TURB
|
Television |
|
TV*
|
(to be pronounced “TEE-VASIS) T visual approach slope |
|
T-VASIS
|
indicator system |
|
TVOR
|
Terminal VOR |
|
TWR
|
Aerodrome control tower or aerodrome control |
|
TWY
|
Taxiway |
|
TYP
|
Type of aircraft |
|
TYPH
|
Typhoon |
|
|
|
|
UAB
|
Until advised by… |
|
UAC
|
Upper area control centre |
|
UFN
|
Until further notice |
|
ULR
|
Ultra long range |
|
UNL
|
Unlimited |
|
U/S
|
Unserviceable |
|
US$*
|
American dollar(s) |
|
UTC
|
Co-ordinated Universal Time |
|
|
|
|
VA
|
Volcanic ash |
|
VAC
|
Visual approach chart |
|
VAL
|
In valleys |
|
VAL
|
Visual approach and landing chart |
|
VAN
|
Runway control van |
|
VAR
|
Magnetic variation |
|
VASIS
|
Visual approach slope indicator system |
|
VC
|
Vicinity of the aerodrome (followed by FG=fog, FC=funnel cloud, SH=showers, PO=dust/sand whirls, BLDU=blowingdust, BLSA=blowing sand or BLSN=blowing snow, e.g. VCFG=vicinity fog) |
|
VCP*
|
VOR check point |
|
VCY
|
Vicinity |
|
VDF
|
Very high frequency direction-finding station |
|
VER
|
Vertical |
|
VFR
|
Visual flight rules |
|
VHF
|
Very high frequency (30 - 300 MHz) |
|
VIA
|
By way of... |
|
VIO
|
Heavy (used to qualify interference or static reports) |
|
VIP
|
Very important person |
|
VIS
|
Visibility |
|
VLF
|
Very low frequency (3 to 30 kHz) |
|
VLR
|
Very long range |
|
VMC
|
Visual meteorological conditions |
|
VOL*
|
Volume |
|
VOLMET
|
Meteorological information for aircraft in flight |
|
VOR
|
VHF omnidirectional radio range |
|
VORTAC
|
VOR and TACAN combination |
|
VOT
|
VOR airborne equipment test facility |
|
VRB
|
Variable |
|
VSA
|
By visual reference to the ground |
|
VSP
|
Vertical speed |
|
VTOL
|
Vertical take-off and landing |
|
VVV
|
Retransmit this message to all addressees mentioned in the line following the heading, as though it had been filed locally at your center (group used in a diversion indicator) |
|
VVV…
|
Marking or test transmission (sent in a series) |
|
|
|
|
W
|
West or western longitude |
|
W
|
White |
|
WA
|
Word after |
|
WAC
|
World aeronautical chart - ICAO 1:1 000 000 |
|
WAFC
|
World area forecast centre |
|
WB
|
Westbound |
|
WB
|
Word before |
|
WBAR
|
Wing bar lights |
|
WD
|
Words or groups |
|
WDSPR
|
Widespread |
|
WED
|
Wednesday |
|
WEF
|
With effect from or effective from |
|
WGS-84
|
World Geodetic System - 1984 |
|
WI
|
Within |
|
WID
|
Width |
|
WIE
|
With immediate effect or effective immediately |
|
WILCO
|
Will comply |
|
WINTEM
|
Forecast upper wind and temperature for aviation |
|
WIP
|
Work in progress |
|
WKN
|
Weak or weakening |
|
WNW
|
West north west |
|
WO
|
Without |
|
WPT
|
Way-point |
|
WRNG
|
Warning |
|
WS
|
Wind shear |
|
WSPD
|
Wind speed |
|
WSW
|
West south west |
|
WT
|
Weight |
|
WTSPT
|
Waterspout |
|
WTWS*
|
Windshear and Turbulence Warning System |
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WWW
|
World wide web |
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WX
|
Weather |
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X
|
Cross |
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XBAR
|
Crossbar (of approach lighting system) |
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XNG
|
Crossing |
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XS
|
Atmospherics |
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XX
|
Heavy (used to qualify weather phenomena such as rain, e.g. |
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|
heavy rain= XXRA) |
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Y
|
Yellow |
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YCZ
|
Yellow caution zone (runway lighting) |
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YD
|
Yards |
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YES
|
Yes; affirmative (to de used in AFS as a procedure signal |
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YR
|
Your |
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Z
|
Zulu - Coordinated Universal Time (in meteorological messages) |
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