(message type designator)
AS Altostratus
ASC Ascent to or ascending to
ASDA Accelerate stop distance available
A-SMR Advanced Surface Movement Radar
ASPH Asphalt
ASR Airport surveillance radar
ATA Actual time of arrival
ATC Air traffic control
ATD Actual time of departure
ATFM Air Traffic Flow Management
ATIS Automatic Terminal Information Service
ATMC Airspace and traffic management centre
ATS Air traffic service
ATTN Attention
ATZ Aerodrome traffic zone
AUG August
AUW All up weight
AVBL Available
AVGAS Aviation gasoline
AWY Airway
AZ Azimuth station
AZM Azimuth
B
B Blue
BA Braking action
BASE Cloud base
BCFG Fog patches
BCN Beacon (aeronautical ground light)
BCST Broadcast
BDRY Boundary
BECMG Becoming
BKN Broken
BLDG Building
BLO Below clouds
BLSN Blowing snow
BLW Below …
BR Mist
BRG Bearing
BRKG Braking
BS Commercial broadcasting station
BTL Between layers
BTN Between
C
C Centre (Runway identification)
C Degrees Celsius (Centigrade)
CAT Category
CAT Clear air turbulance
CAVOK Visibility, cloud and present weather better than prescribed values or conditions (in Europe: visibility more than 10 km, no clouds below 5000 ft, no precipitation, no cb, no drifting snow, no sandstorm
CB Cumulonimbus
CC Cirrocumulus
CD Candela
CEST Central European Summertime
CET Central European Time
CEU-W Central Executive Unit West
CFM Confirm or I confirm
CH Channel
CHG Modification message
CI Cirrus
CIV Civil
CLR Clear or cleared to or clearance
CLSD Closed
Cm Centimetre(s)
CMPL Completion or completed or complete
CNL Cancel or cancelled
CNL Flight plan cancellation message
COM Communications
CON CONSOL
CONC Concrete
COND Condition
CONST Construction or constructed
CONT Continue or continued
COORD Corrdinates
COP Change-over point
COR Correct or corrected or correction
COV Cover or covered or covering
CPL Current flight plan message
CRAM Conditional routes available message
CS Call sign
CS Cirrostratus
CTA Control area
CTL Control
CTN Caution
CTR Control zone
CU Cumulus
CUST Customs
CVFR Controlled VFR flight
CW Continuous wave
CWY Clearway
D
“d” Thickness of flexible pavement (replaced by PCN)
D… Danger area (followed by identification)
DA Decision altitude
DEC December
DEG Degrees
DEP Depart or departure
DEP Departure message
DER Departure end of runway
DES Descend to or descending to
DEST Destination
DETRESFA Distress phase
DF Direction Finder
DH Decision height
DIST Distance
DLA Delay message
DLA Delay or delayed
DME Distance measuring equipment
DNG Danger or dangerous
DOF Date of flight
DP Dew point temperature
DR Dead reckoning
DRG During
DRSN Drifting snwo
DTAM Descend to and maintain
DTG Date-time group
DTRT Deteriorate or deteriorating
DTW Dual tandem wheels
DUR Duration
DVOR Doppler VOR
DVORTAC Doppler VOR and TACAN
DW Dual wheels
DWD Deutscher Wetterdienst
DZ Drizzle
E
E East or eastern longitude
EAT Expected approach time
EEE Error
EET Estimated elapse time
EFAS Electronic flash approach light system
EHF Extremely high frequency (30000 to 300000 MHz
EL Elevation station
ELEV Elevation
ELT Emergency locator transmitter
EM Emission
EMBD Embedded
EMERG Emergency
En