Chapter 2. United States of America Aeronautical
Contractions
Section 1. Decode
EXPLANATION OF CODES
GEN - Indicates general aeronautical usage.
NWS - Indicates National Weather Service and aeronautical weather usage.
ATC - Indicates Air Traffic Control usage.
ICAO - Indicates International Civil Aviation Organization usage. International messages should use these.
METAR/TAF - Indicates ICAO weather usage.
A
|
Contraction |
Definition |
Usage |
|---|---|---|
|
+FC |
tornado/water spout |
METAR |
|
A |
absolute (temperature) |
NWS |
|
A |
Alaskan Standard Time (time groups only) |
NWS |
|
A |
Amber |
GEN |
|
A |
arctic (air mass) |
NWS |
|
A/A |
air to air |
ATC |
|
A/C |
approach control |
ATC |
|
A/G |
air to ground |
ICAO |
|
A/H |
already had |
ATC |
|
AAC |
Alaskan Air Command |
GEN |
|
AAD |
Assigned altitude deviation |
ICAO |
|
AADC |
approach and departure control |
ATC |
|
AAF |
Army Air Field |
GEN |
|
AAITVL |
arrival aircraft interval |
ATC |
|
AAL |
Above aerodrome level |
ICAO |
|
AAL |
Alaskan Region, FAA |
GEN |
|
AAP |
Advise if able to proceed |
ATC |
|
AAR |
airport arrival rate |
ATC |
|
AARTE |
airport acceptance rate |
ATC |
|
AATM |
at all times |
GEN |
|
AAWF |
Auxiliary Aviation Weather Facility |
NWS |
|
AAWTA |
Advise at what time able |
ICAO |
|
AB |
Airborne |
ATC |
|
ABBR |
Abbreviate |
GEN |
|
ABCST |
automatic broadcast |
GEN |
|
ABD |
Aboard |
GEN |
|
ABI |
Advance boundary information |
ICAO |
|
ABLCHG |
airborne launching |
ATC |
|
ABM |
abeam |
ICAO |
|
ABN |
aerodrome beacon |
ICAO |
|
ABND |
abandon |
GEN |
|
ABNDT |
abundant |
GEN |
|
ABNML |
abnormal |
GEN |
|
ABT |
about |
GEN |
|
ABV |
above |
ICAO |
|
AC |
Advisory Circular |
GEN |
|
AC |
altocumulus |
NWS |
|
AC |
assistant chief |
GEN |
|
ACA |
artic control area |
ATC |
|
ACARS |
Aircraft communication addressing and reporting system |
ICAO |
|
ACAS |
airborne collision avoidance system |
ICAO |
|
ACC |
area control center |
ATC |
|
ACC |
altocumulus castellanus |
NWS |
|
ACCID |
notification of aircraft accident |
ATC |
|
ACCT |
account |
GEN |
|
ACCUM |
accumulate |
GEN |
|
ACDNT |
accident |
GEN |
|
ACDO |
Air Carrier District Office |
GEN |
|
ACE |
Central Region, FAA |
GEN |
|
ACES |
access |
GEN |
|
ACFT |
aircraft |
ICAO |
|
ACID |
aircraft identification |
ATC |
|
ACK |
acknowledge |
GEN |
|
ACL |
altimeter check location |
ATC |
|
ACLD |
above clouds |
GEN |
|
ACLS |
automatic carrier landing system |
GEN |
|
ACLT |
accelerate |
GEN |
|
ACM |
air combat maneuvers |
ATC |
|
ACN |
aircraft classification number |
ICAO |
|
ACN |
all concerned notified |
GEN |
|
ACNOT |
accident notice |
GEN |
|
ACP |
acceptance (message type designator) |
ICAO |
|
ACP |
area command post |
GEN |
|
ACPT |
accept |
GEN |
|
ACPY |
accompany |
GEN |
|
ACR |
air carrier |
GEN |
|
ACRBT |
acrobatic |
ATC |
|
ACRS |
across |
GEN |
|
ACSL |
standing lenticular altocumulus |
NWS |
|
ACT |
active or activated or activity |
ICAO |
|
ACT |
air combat training |
ATC |
|
ACT |
Technical Center, FAA |
GEN |
|
ACTG |
acting |
GEN |
|
ACTV |
active |
GEN |
|
ACTVT |
activate |
GEN |
|
ACW |
aircraft control and warning |
GEN |
|
ACYC |
Anticyclonic |
NWS |
|
AD |
Aerodrome |
ICAO |
|
ADA |
advisory area |
ATC |
|
ADAP |
Airport Development Aid Program |
GEN |
|
ADC |
Aerodrome chart |
ICAO |
|
ADCF |
Air Defense Control Facility |
GEN |
|
ADCON |
advise or issue instructions to all concerned |
GEN |
|
ADCUS |
advise customs |
GEN |
|
ADDN |
addition |
GEN |
|
ADE |
Air Defense Emergency |
GEN |
|
ADF |
automatic direction finder |
GEN |
|
ADFAP |
automatic direction finder approach |
ATC |
|
ADIZ |
air defense identification zone |
GEN |
|
ADJ |
adjacent |
ICAO |
|
ADL |
aggregate demand list |
ATC |
|
ADLO |
Air Defense Liaison Officer |
GEN |
|
ADLY |
arrival delay |
ATC |
|
ADMAP |
advise by air mail as soon as possible |
GEN |
|
ADMIN |
administration |
GEN |
|
ADMIR |
administrator |
GEN |
|
ADMIS |
aircraft departing at (number of minutes) intervals |
ATC |
|
ADMIV |
administrative |
GEN |
ADNL |
additional |
GEN |
|
ADNL TFC |
additional traffic is |
ATC |
|
ADNOK |
advise if not correct |
ATC |
|
ADO |
Aerodrome office (specify service) |
ICAO |
|
ADO |
Airport District Office |
GEN |
|
ADP |
automatic data processing |
GEN |
|
ADPE |
automatic data processing equipment |
GEN |
|
ADPS |
automatic data processing systems |
GEN |
|
ADQT |
adequate |
GEN |
|
ADR |
airport departure rate |
ATC |
|
ADR |
advisory route |
ATC |
|
ADRDE |
advise reason for delay |
ATC |
|
ADRNDCK |
adirondack |
NWS |
|
ADRT |
alternate departure route |
ATC |
|
ADS |
address |
GEN |
|
ADS |
Air Defense Sector |
GEN |
|
ADS |
automatic dependent surveillance |
ICAO |
|
ADS-B |
Automatic Dependent Surveillance-B |
ICAO |
|
ADSPN |
advise disposition |
GEN |
|
ADSU |
automatic dependent surveillance unit |
ICAO |
|
ADV |
advise |
NWS |
|
ADVALT |
allotment advice |
GEN |
|
ADVC |
advice |
GEN |
|
ADVCTN |
advection |
NWS |
|
ADVN |
advance |
GEN |
|
ADVY |
advisory |
NWS |
|
ADVZY |
advisory |
ATC |
|
ADW |
air defense warning |
GEN |
|
ADZ |
advise |
ICAO |
|
ADZAR |
advise arrival |
ATC |
|
ADZI |
advise intentions |
ATC |
|
ADZOF |
advise this office |
GEN |
|
ADZY |
advisory |
ATC |
|
ADZY |
advisory |
GEN |
|
AEA |
Eastern Region, FAA |
GEN |
|
AEM |
aircraft and engine mechanic |
GEN |
|
AENG |
airways engineer |
GEN |
|
AER |
approach end runway |
GEN |
|
AERO |
aeronautical |
GEN |
|
AES |
aircraft earth station |
ICAO |
|
AEU |
Europe, Africa, and Middle East Office, FAA |
GEN |
|
AEVAC |
air evacuation |
ATC |
|
AEW |
airborne early warning |
GEN |
|
AFB |
Air Force Base |
GEN |
|
AFC |
area forecast center |
NWS |
|
AFCT |
affect |
GEN |
|
AFDK |
after dark |
NWS |
|
AFIL |
filed flight plan in the air |
GEN |
|
AFIO |
authorization for interceptor operations |
ATC |
|
AFIRM |
affirmative |
GEN |
|
AFIS |
aerodrome flight information service |
ICAO |
|
AFJ |
Air Force Jet |
ATC |
|
AFM |
affirmative |
ICAO |
|
AFNEA |
Air Force NOTAM Exchange Area |
GEN |
|
AFNEO |
Air Force NOTAM Exchange Office |
GEN |
|
AFOVRN |
Air Force overrun 1000-ft standard approach lighting system |
MIL |
|
AFRCC |
Air Force Rescue Coordination Center |
GEN |
|
AFREP |
Air Force Representative to the FAA |
GEN |
|
AFRT |
air freight |
GEN |
|
AFS |
aeronautical fixed service |
GEN |
|
AFT |
after |
GEN |
|
AFTN |
Aeronautical Fixed Telecommunications Network |
GEN |
|
AFTN |
afternoon |
GEN |
|
AG |
air ground |
ATC |
|
AGA |
aerodromes, air routes and ground aids |
ICAO |
|
AGACS |
automatic ground air/ground communication system |
GEN |
|
A-GEAR |
arresting gear |
GEN |
|
AGL |
above ground level |
ICAO |
|
AGL |
Great Lakes Region, FAA |
GEN |
|
AGN |
again |
GEN |
|
AGR |
agree |
GEN |
|
AGRMT |
agreement |
GEN |
|
AHD |
ahead |
GEN |
|
AI |
arrival approved request for IFR flight |
ATC |
|
AIA |
advise if able |
ATC |
|
AIATSC |
all international air traffic switching centers |
GEN |
|
AIC |
Aeronautical Information Circular |
GEN |
|
AID |
airport information desk |
GEN |
|
AIDC |
Air traffic services inter-facility data communication |
ICAO |
|
AIFP |
activate IFR flight plan |
ATC |
|
AILS |
automatic instrument landing system |
GEN |
|
AIM |
Airman's Information Manual |
GEN |
|
AIP |
Aeronautical Information Publication |
ATC |
|
AIP |
aeronautical information publications (In General) |
GEN |
|
AIRAC |
aeronautical information regulation and control |
GEN |
|
AIRCOMNET |
Air Force Communications Network |
GEN |
|
AIREP |
air report |
GEN |
|
AIRFL |
air refueling |
ATC |
|
AIRMET |
Airmen's Meteorological Information |
GEN |
|
AIROPNET |
air operations network |
GEN |
|
AIS |
aeronautical information service |
GEN |
|
AIS |
aeronautical information specialist |
GEN |
|
AIS |
airport in sight |
GEN |
|
AL |
all (when used as prefix) |
GEN |
|
AL |
annual leave |
GEN |
|
AL/(---) |
at least (altitude) |
ATC |
|
ALA |
alighting area |
GEN |
|
ALACFO |
all air carrier field offices |
GEN |
|
ALADLO |
all air defense liaison officers in service area |
GEN |
|
ALAFFO |
all technical operations |
GEN |
|
ALANO |
all accident notice offices |
GEN |
|
ALARTC |
all air route traffic control centers in service area |
GEN |
|
ALAT |
all air traffic service personnel in service area |
GEN |
|
ALATAS |
all air traffic (area) supervisors in service area |
GEN |
|
ALATF |
all air traffic field facilities |
GEN |
|
ALATFO |
all air traffic field offices |
GEN |
|
ALCKT |
all offices having send-receive teletypewriter service on circuit |
GEN |
|
ALCS/C |
all air traffic combined station/centers in service area |
GEN |
|
ALCS/T |
All air traffic combined station/towers in service area |
GEN |
|
ALCT |
attempt to locate |
GEN |
|
ALDA |
Air Line Dispatchers Association |
GEN |
|
ALERFA |
alert phase code (alerting service) |
ATC |
|
ALF |
aloft |
NWS |
|
ALFAA |
all FAA field offices and personnel |
GEN |
|
ALFAB |
all FAA offices on NADIN |
GEN |
|
ALFSFO |
all flight standards field offices |
GEN |
|
ALFSS |
all flight service stations in service area |
GEN |
|
ALG |
along |
GEN |
|
ALGHNY |
Allegheny |
NWS |
|
ALIATSC |
all international aeronautical telecommunication switching centers |
GEN |
|
ALIFO |
all international field offices |
GEN |
|
ALIFSS |
all international flight service stations in service area |
GEN |
|
ALNMT |
alignment |
GEN |
|
ALNOT |
alert notice |
GEN |
|
ALP |
airport layout plan |
GEN |
|
ALPA |
Air Line Pilots Association |
GEN |
|
ALQDS |
all quadrants |
NWS |
|
ALR |
alerting |
ICAO |
|
ALRAFAC |
all radar ATC facilities in service area |
GEN |
|
ALRGN |
all regional/service area offices |
GEN |
|
ALS |
approach light system |
ICAO |
|
ALSEC |
all sectors |
NWS |
|
ALSF-1 |
standard 2400' high-intensity approach lighting system with sequenced flashers (Category I configuration) |
GEN |
|
ALSF-2 |
standard 2400' high-intensity approach lighting system with sequenced flashers (Category II configuration) |
GEN |
|
ALSTG |
altimeter setting |
GEN |
|
ALT |
altitude |
ICAO |
|
ALTA |
Alberta |
NWS |
|
ALTM |
altimeter |
GEN |
|
ALTN |
alternate or alternating |
ICAO |
|
ALTN |
alternate (aerodrome) |
ICAO |
|
ALTPT |
alternate airport |
GEN |
|
ALTRV |
altitude reservation |
GEN |
|
ALTWR |
all ATC towers in service area |
GEN |
|
ALUTN |
Aleutian |
NWS |
|
ALWF |
actual wind factor |
NWS |
|
AM |
ante meridiem |
NWS |
|
AMA |
area minimum altitude |
ICAO |
|
AMB |
ambiguity |
GEN |
|
AMC |
Air Mobility Command |
ATC |
|
AMC |
Mike Monroney Aeronautical Center, FAA |
GEN |
|
AMCL |
amended clearance |
ATC |
|
AMD |
amend / amended forecast |
GEN/ |
|
AMDT |
amendment |
ICAO |
|
AMECH |
account mechanical |
GEN |
|
AMGR |
airport manager |
GEN |
|
AMIS |
aircraft movement information services |
GEN |
|
AMOS |
Automatic Meteorological Observing System |
GEN |
|
AMP |
Amplifier or amplify |
GEN |
|
AMPLTD |
amplitude |
NWS |
|
AMRF |
amended route of flight |
ATC |
|
AMS |
aeronautical mobile service |
GEN |
|
AMS |
air mass |
NWS |
|
AMS |
American Meteorological Society |
NWS |
|
AMSL |
above mean sea level |
GEN |
|
AMSS |
aeronautical mobile satellite service |
ICAO |
|
AMT |
Amount |
GEN |
|
AMVER |
Automated Mutual-Assistance Vessel Rescue System |
ATC |
|
ANC |
Aeronautical chart 1:500 000 (followed by name/title) |
ICAO |
|
ANCPT |
anticipate |
GEN |
|
ANCS |
Aeronautical navigation chart small scale (followed by name/title scale) |
ICAO |
|
ANE |
New England Region, FAA |
GEN |
|
ANF |
air navigation facility |
GEN |
|
ANG |
Air National Guard |
GEN |
|
ANLYS |
Analysis |
NWS |
|
ANM |
Northwest Mountain Region, FAA |
GEN |
|
ANMS |
Automatic Network Management System |
GEN |
|
ANNC |
announce |
GEN |
|
ANR |
Advanced Navigation Routes |
ATC |
|
ANRA |
air navigation radio aids |
GEN |
|
ANS |
answer |
GEN |
|
ANT |
antenna |
GEN |
|
AO1 |
ASOS automated observation without precipitation discriminator (rain/snow) |
METAR |
|
AO2 |
ASOS automated observation with precipitation discriminator (rain/snow) |
NWS |
|
AOA |
at or above |
ATC |
|
AOAF |
at or after |
ATC |
|
AOB |
at or below |
ATC |
|
AOBF |
at or before |
ATC |
|
AOC |
aerodrome obstacle chart (followed by type & name/title) |
ICAO |
|
AOC |
airport operating certificate |
GEN |
|
AOCP |
aircraft out of commission for parts |
GEN |
|
AOE |
airport of entry |
GEN |
|
AOPA |
Aircraft Owners and Pilots Association |
GEN |
|
AP |
airport |
ICAO |
|
AP |
anomalous propagation |
ATC |
|
APAP |
approach path alignment panel |
GEN |
|
APAPI |
Abbreviated precision approach path indicator |
ICAO |
|
APC |
area positive control |
ATC |
|
APCH |
approach |
ICAO |
|
APDC |
Aircraft parking/docking chart (followed by name/title) |
ICAO |
|
APL |
airport lights |
GEN |
|
APLCN |
Appalachian |
NWS |
|
APN |
Apron |
ICAO |
|
APNT |
appoint |
GEN |
|
APP |
approach control or approach control office |
ICAO |
|
APPA |
advise present position and altitude |
ATC |
|
APPR |
appear |
GEN |
|
APR |
airports program report |
GEN |
|
APREQ |
approval request |
GEN |
|
APRNT |
apparent |
GEN |
|
APROP |
appropriate |
GEN |
|
APRX |
approximate |
GEN |
|
APS |
airborne pulse search radar |
GEN |
|
APSG |
after passing |
ICAO |
|
APV |
approve |
GEN |
|
APVL |
approval |
GEN |
|
AR |
Atlantic Route |
ATC |
|
ARAC |
area airports checked |
ATC |
|
ARAC |
Army Radar Approach Control facility (US Army) |
GEN |
|
ARAD |
altitude radial |
ATC |
|
ARB |
Air Reserve Base |
GEN |
|
ARC |
Area chart |
ICAO |
|
ARCP |
air refueling control point |
ATC |
|
AREP |
air refueling egress point |
ATC |
|
AREX |
air refueling exit |
ATC |
|
ARFF |
aircraft rescue and fire fighting |
ATC |
|
ARFFOK |
airport rescue and fire fighting alarm checked |
ATC |
|
ARFOR |
area forecast |
GEN |
|
ARINC |
Aeronautical Radio, Incorporated |
GEN |
|
ARIP |
air refueling initial point |
ATC |
|
ARL |
Aerial |
ATC |
|
ARLO |
Army Liaison Officer |
GEN |
|
ARMET |
forecast upper wind and temperature at specified points |
GEN |
|
ARML |
Airmail |
GEN |
|
ARND |
Around |
GEN |
|
ARNG |
Arrange |
GEN |
|
ARNOT |
area notice |
GEN |
|
ARO |
air traffic services reporting office |
GEN |
|
ARO |
Airport Reservations Office |
GEN |
|
ARP |
aerodrome reference point |
ICAO |
|
ARP |
airport reference point |
GEN |
|
ARP |
airport reservation position |
GEN |
|
ARP |
air-report |
GEN |
|
ARPT |
Airport |
GEN |
|
ARQ |
automatic error correction equipment |
GEN |
|
ARR |
arrive or arrival |
ICAO |
|
ARS |
Air Rescue Service (USAF) |
GEN |
|
ARS |
special air-report |
GEN |
|
ARSA |
airport radar service area |
ATC |
|
ARSR |
air route surveillance radar |
GEN |
|
ARST |
arrest |
GEN |
|
ARST |
arresting |
ICAO |
|
ARTC |
air route traffic control |
GEN |
|
ARTCC |
Air Route Traffic Control Center |
GEN |
|
ARTS |
Automated Radar Terminal Systems |
GEN |
|
ARU |
Airborne Radar Unit |
GEN |
|
ARU |
Airspace Reservation Unit (Canadian) |
GEN |
|
ARUNK |
arrival unknown |
ATC |
|
AS |
altostratus |
NWS |
|
AS/R |
automatic send/receive |
GEN |
|
ASAP |
as soon as possible |
GEN |
|
ASC |
ascent to |
GEN |
|
ASCU |
automatic scanning control unit |
GEN |
|
ASD |
airspace docket |
GEN |
|
ASDA |
accelerate-stop distance available |
ICAO |
|
ASDE |
airport surface detection equipment |
GEN |
|
ASE |
Altimetry system error |
ICAO |
|
ASGN |
assign |
GEN |
|
ASHTAM |
Volcanic Ash Advisory |
ICAO |
|
ASI |
altimeter setting indicator |
GEN |
|
ASIP |
airspace flight inspection pilot |
GEN |
|
ASL |
above sea level |
GEN |
|
ASMD |
assumed |
ATC |
|
ASND |
ascend |
GEN |
|
ASO |
Southern Region, FAA |
GEN |
|
ASOS |
automated surface observing system |
NWS |
|
ASP |
airport system plan |
GEN |
|
ASP |
airspace |
GEN |
|
ASPH |
asphalt |
ICAO |
|
ASR |
airport surveillance radar |
GEN |
|
ASSOC |
associate |
GEN |
|
ASST |
assistant |
GEN |
|
ASW |
Southwest Region, FAA |
GEN |
|
ATA |
actual time of arrival |
ATC |
|
ATA |
Air Transport Association of America |
GEN |
|
ATAM |
at and maintain |
ATC |
|
ATAR |
above transmitted as received |
GEN |
|
ATC |
air traffic control |
ICAO |
|
ATCA |
Air Traffic Control Association |
GEN |
|
ATCA |
ATC advises |
ATC |
|
ATCAA |
ATC assigned airspace |
ATC |
|
ATCBI |
ATC beacon interrogator |
GEN |
|
ATCC |
ATC clears |
ATC |
|
ATCF |
ATC facility |
GEN |
|
ATCH |
attach |
GEN |
|
ATCOR |
ATC operations representative |
GEN |
|
ATCR |
ATC requests |
ATC |
|
ATCRBS |
ATC radar beacon system |
GEN |
|
ATCS |
ATC specialist |
GEN |
|
ATCSCC |
David J. Hurley ATC System Command Center |
GEN |
|
ATCT |
Airport Traffic Control Tower |
GEN |
|
ATD |
actual time of departure |
ATC |
|
ATFC |
account traffic |
GEN |
|
ATFM |
air traffic flow management |
ICAO |
|
ATIS |
automatic terminal information service |
ICAO |
|
ATLC |
Atlantic |
NWS |
|
ATM |
air traffic management |
ICAO |
|
ATM |
air traffic manager |
ATC |
|
ATM |
authentication maneuver |
ATC |
|
ATMT |
attempt |
GEN |
|
ATMTC |
attempt to contact |
ATC |
|
ATN |
Aeronautical Telecommunications Network |
ICAO |
|
ATND |
attend |
GEN |
|
ATO |
aeronautical telecommunications operator |
GEN |
|
ATO |
Air Traffic Organization |
GEN |
|
ATOG |
allowable take-off gross weight |
GEN |
|
ATP |
actual time of penetration |
ATC |
|
ATP |
air traffic procedures |
GEN |
|
ATPAC |
Air Traffic Procedures Advisory Committee |
GEN |
|
ATR |
air transport rating |
GEN |
|
ATREP |
air traffic representative |
GEN |
|
ATRLS |
actual time of release |
ATC |
|
ATSCCP |
Air Traffic Service Contingency Command Post |
GEN |
|
ATT |
American Telephone and Telegraph Company |
GEN |
|
ATTM |
at this time |
GEN |
|
ATTN |
attention |
GEN |
|
AT-VASIS |
Abbreviated T visual approach slope indicator system |
ICAO |
|
ATZ |
aerodrome traffic zone |
ICAO |
|
AUGRA |
authority granted |
GEN |
|
AURBO |
Aurora Borealis |
NWS |
|
AUREQ |
authority is requested |
GEN |
|
AUTH |
authority |
GEN |
|
AUTH |
authorized or authorization |
ICAO |
|
AUTO |
automatic |
ICAO |
|
AUTOB |
automatic weather reporting system |
GEN |
|
AUW |
all up weight (gross weight) |
GEN |
|
AUX |
auxiliary |
GEN |
|
AUZ |
authorize |
GEN |
|
AVANA |
altitude reservation void for aircraft not airborne by --- |
ATC |
|
AVBL |
available or availability |
ICAO |
|
AVFP |
activate VFR flight plan |
ATC |
|
AVFPNO |
pilot failed to activate VFR/DVFR flight plan |
ATC |
|
AVG |
average |
GEN |
|
AVGAS |
aviation gasoline |
ICAO |
|
AVN |
aviation |
GEN |
|
AWA |
advise when able |
ATC |
|
AWANS |
Aviation Weather and NOTAM System |
GEN |
|
AWBE |
automatic weather broadcast equipment |
GEN |
|
AWE |
advise when established |
ATC |
|
AWL |
all weather landing |
ATC |
|
AWOS |
automatic weather observing/reporting system |
GEN |
|
AWP |
aviation weather processors |
NWS |
|
AWP |
Western-Pacific Region, FAA |
GEN |
|
AWS |
air weather service (USAF) |
GEN |
|
AWT |
await or awaiting |
GEN |
|
AWX |
account weather |
GEN |
|
AWY |
airway |
ICAO |
|
AXPS |
air express |
GEN |
|
AZM |
azimuth |
ICAO |
|
AZRAN |
azimuth and range data |
ATC |
,
B
|
Contraction |
Definition |
Usage |
|---|---|---|
|
B |
base leg |
ATC |
|
B |
beginning of precipitation (time in minutes) (weather reports only) |
NWS |
|
B |
Bering Standard Time (time groups only) |
NWS |
|
B |
blue |
GEN |
|
B |
center clearance delivered |
ATC |
|
BA |
braking action |
ICAO |
|
BAC |
below all clouds |
ATC |
|
BACLIN |
baroclinic or baroclinic prognosis |
NWS |
|
BAFVC |
bids accepted for the following vacancies |
GEN |
|
BAL |
balance |
GEN |
|
BASE |
cloud base |
GEN |
|
BASOPS |
Base Operations Office |
GEN |
|
BATROP |
barotropic or barotropic prognosis |
NWS |
|
BC |
back course |
GEN |
|
BC |
beginning climb |
ATC |
|
BC |
|
NWS |
|
BC |
patches |
METAR |
|
BCFG |
fog patches |
NWS |
|
BCH |
beach |
NWS |
|
BCKG |
backing |
NWS |
|
BCM |
back course marker |
GEN |
|
BCM |
become |
GEN |
|
BCN |
beacon |
ICAO |
|
BCREQ |
broadcast requested |
ATC |
|
BCST |
broadcast |
ICAO |
|
BCSTN |
broadcast station |
GEN |
|
BDA |
|
NWS |
|
BDAT |
beacon data (digitized) |
ATC |
|
BDR |
border |
GEN |
|
BDRY |
boundary |
ICAO |
|
BDSLD |
bids solicited |
GEN |
|
BECMG |
becoming (expected between 2 digit beginning hour and 2 digit ending hour) |
TAF |
|
BFDK |
before dark |
NWS |
|
BFR |
before |
GEN |
|
BGN |
began or begin |
GEN |
|
BGND |
begin or beginning descent |
ATC |
|
BHND |
behind |
GEN |
|
BIFR |
before encountering IFR conditions |
ATC |
|
BINOVC |
breaks in overcast |
NWS |
|
BKN |
broken |
METAR |
|
BL |
blowing |
METAR |
|
BLD |
build |
NWS |
|
BLDG |
building |
ICAO |
|
BLDU |
blowing dust |
METAR |
|
BLDUP |
buildup |
NWS |
|
BLKHLS |
|
NWS |
|
BLKT |
blanket |
NWS |
|
BLN |
balloon |
GEN |
|
BLO |
below |
GEN |
|
BLO |
below clouds |
ICAO |
|
BLSA |
blowing sand |
METAR |
|
BLSN |
blowing snow |
METAR |
|
BLW |
below |
ICAO |
|
BLX |
block |
ATC |
|
BLZD |
blizzard |
NWS |
|
BMBR |
bomber |
GEN |
|
BMS |
basic meteorological services |
NWS |
|
BND |
bound |
GEN |
|
BNDRY |
boundary |
NWS |
|
BNTH |
beneath |
GEN |
|
BOMB |
bombing |
GEN |
|
BOVC |
base of overcast |
NWS |
|
BPOC |
before proceeding on course |
ATC |
|
BPS |
bytes per second |
GEN |
|
BPT |
beginning procedure turn |
ATC |
|
BR |
|
ATC |
|
BR |
branch |
GEN |
|
BR |
mist |
METAR |
|
BRAG |
braking action good |
GEN |
| BRAM | braking action medium | GEN |
|
BRAN |
braking action nil |
GEN |
|
BRAP |
braking action poor |
GEN |
|
BRF |
brief |
NWS |
|
BRG |
bearing |
GEN |
|
BRGT |
bright |
GEN |
|
BRITE |
bright radar indicator tower equipment |
GEN |
|
BRK |
break |
NWS |
|
BRKG |
braking |
ICAO |
|
BRKHIC |
breaks in higher overcast |
NWS |
|
BRKSHR |
|
NWS |
|
BRM |
barometer |
NWS |
|
BS |
commercial broadcasting station |
ICAO |
|
BSAF |
bids solicited as follows |
GEN |
|
BSC |
bird sweep completed |
ATC |
|
BSHP |
beginning standard holding procedure |
ATC |
|
BSIAP |
beginning straight-in approach |
ATC |
|
BSRAP |
beginning standard range approach |
ATC |
|
BSRO |
begin standard refuel orbit |
ATC |
|
BT |
back taxiing |
ATC |
|
BTL |
between layers |
ICAO |
|
BTN |
between |
ICAO |
|
BTR |
better |
GEN |
|
BTWN |
between |
NWS |
|
BUEC |
backup emergency communication |
GEN |
|
BUIC |
backup interceptor control |
ATC |
|
BUL |
bulletin |
GEN |
|
BUR |
bureau |
GEN |
|
BUS |
business |
GEN |
|
BY |
blowing spray (weather reports only) |
METAR |
|
BYD |
beyond |
GEN |
|
BZR |
buzzer (radar) |
GEN |
,
C
|
Contraction |
Definition |
Usage |
|---|---|---|
|
C |
celsius |
GEN |
|
C |
Central Standard Time (time groups only) |
NWS |
|
C |
centre (runway ID) |
ICAO |
|
C |
circling (approach and landing charts) |
ATC |
|
C |
continental (air mass) |
NWS |
|
C/A |
Coarse/Acquisition |
ATC |
|
CA |
clear above (PIREP only) |
ATC |
|
CAAS |
Class A Airspace |
ATC |
|
CAC |
change to approach control or changing to approach control |
ATC |
|
CAC |
contact approach control |
ATC |
|
CACT |
civil air carrier turbojet |
GEN |
|
CADO |
Chief, Airport District Office |
GEN |
|
CAM |
Canadian Armed Forces Transport Command |
GEN |
|
CAN |
Canada |
NWS |
|
CANFORCE |
Canadian Armed Force |
GEN |
|
CANO |
catalogue number |
GEN |
|
CANOT |
Canadian NOTAM |
GEN |
|
CANR |
Canadian NORAD Region |
GEN |
|
CAO |
change of appointing office |
GEN |
|
CAP |
Civil Air Patrol |
GEN |
|
CAP/IS |
combined approach control/international station |
GEN |
|
CAPD |
climb at pilot s discretion |
ATC |
|
CAPT |
captain |
GEN |
|
CARA |
check area airports |
GEN |
|
CARF |
central altitude reservation function |
GEN |
|
CARIB |
Caribbean |
NWS |
|
CARU |
Canadian Airspace Reservation Unit |
GEN |
|
CAS |
calibrated airspeed |
ATC |
|
CAS |
collision avoidance system |
GEN |
|
CASCDS |
cascades |
NWS |
|
CAT |
category |
ICAO |
|
CAT |
clear air turbulence |
GEN |
|
CATX |
climb and cross |
ATC |
|
CAUFN |
caution advised until further notice |
GEN |
|
CAVOK |
cloud and visibility OK |
NWS |
|
CAVU |
clear or scattered clouds and visibility greater than ten miles |
NWS |
|
CAWS |
common aviation weather subsystem |
NWS |
|
CB |
cumulonimbus |
NWS |
|
CBAS |
Class B airspace |
ATC |
|
CBMAM |
cumulonimbus mamma |
NWS |
|
CBSA |
Class B surface area |
ATC |
|
CC |
carbon copy |
GEN |
|
CC |
cirrocumulus |
NWS |
|
CCA |
continental control area |
GEN |
|
CCAS |
Class C airspace |
ATC |
|
CCC |
Central Computer Complex |
GEN |
|
CCC |
Regional Communications Control Center |
GEN |
|
CCD |
City (or County) Civil Defense Director at____ |
GEN |
|
CCFP |
collaborative convective forecast product |
ATC |
|
CCLDS |
clear of clouds |
ATC |
|
CCLKOB |
counterclockwise orbit |
ATC |
|
CCLKWS |
counterclockwise |
NWS |
|
CCRU |
complete crew |
GEN |
|
CCRZ |
climb and cruise |
ATC |
|
CCSA |
Class C surface area |
ATC |
|
CCSL |
standing lenticular cirrocumulus |
NWS |
|
CCTLR |
chief controller |
GEN |
|
CCUS |
cleared Customs |
GEN |
|
CD |
candela |
ICAO |
|
CD |
civil defense |
GEN |
|
CD |
clearance delivery |
GEN |
|
CDAS |
Class D airspace |
ATC |
|
CDC |
computer display channel |
GEN |
|
CDFNT |
cold front |
NWS |
|
CDM |
collaborative decision making |
ATC |
|
CDN |
coordination |
ICAO |
|
CDO |
communications duty officer |
GEN |
|
CDSA |
Class D surface area |
ATC |
|
CE |
communications equipment |
GEN |
|
CEAS |
Class E airspace |
ATC |
|
CELNAV |
celestial navigation |
GEN |
|
CENGR |
civil engineer |
GEN |
|
CENPAC |
Central North Pacific |
ATC |
|
CER |
climb en route |
ATC |
|
CERAP |
combined center/RAPCON |
GEN |
|
CERT |
certificate |
GEN |
|
CERTIF |
certification |
GEN |
|
CESA |
Class E surface area |
ATC |
|
CF |
change frequency to |
ICAO |
|
CFA |
controlled firing area |
ATC |
|
CFAD |
composite flight data processing |
GEN |
|
CFADC |
Canadian Forces Air Defense Command |
GEN |
|
CFAP |
cleared for approach |
ATC |
|
CFM |
confirm |
GEN |
|
CFM |
Confirm or I confirm |
ICAO |
|
CFN |
confine |
GEN |
|
CFP |
cold front passage |
NWS |
|
CFPL |
carryover from previous log |
ATC |
|
CFR |
Code of Federal Regulations |
GEN |
|
CFWSU |
central flow weather service unit |
GEN |
|
CFY |
clarify |
GEN |
|
CG |
Coast Guard |
GEN |
|
CGAS |
Class G airspace |
ATC |
|
CGAS |
Coast Guard Air Station |
GEN |
|
CGL |
circling guidance light |
ICAO |
|
CGLS |
Coast Guard LORAN Station |
GEN |
|
CGSTN |
congestion |
GEN |
|
CH |
channel |
ICAO |
|
CH |
This is a channel-continuity-check of transmission to permit comparison of your record of channel- sequence numbers of messages received on the channel |
ICAO |
|
CHAP |
chapter |
GEN |
|
CHARC |
characteristic |
GEN |
|
CHC |
chance |
NWS |
|
CHG |
change |
GEN |
|
CHGO |
changing over |
ATC |
|
CHM |
chemicals |
GEN |
|
CHNL |
channel |
GEN |
|
CHOK |
check okay |
GEN |
|
CHOV |
changeover |
ATC |
|
CHRG |
charge |
GEN |
|
CHSPK |
Chesapeake |
NWS |
|
CHTR |
charter |
GEN |
|
CI |
cirrus |
NWS |
|
CIC |
controller in charge |
GEN |
|
CIDIN |
common ICAO data interchange network |
ICAO |
|
CIFP |
cancel IFR flight plan |
ATC |
|
CIFR |
cancel IFR clearance previously given |
ATC |
|
CIFRR |
Common IFR Room |
GEN |
|
CIG |
ceiling |
NWS |
|
CINCNORAD |
Commander in Chief, North American Aerospace Defense Command |
GEN |
|
CIRNAV |
circumnavigate |
ATC |
|
CIRNOT |
circuit notice |
GEN |
|
CIRVIS |
communications instructions for reporting vital intelligence sightings |
ATC |
|
CIT |
near or over large towns |
ICAO |
|
CIV |
civil |
ICAO |
|
CK |
check |
ICAO |
|
CKT |
circuit |
GEN |
|
CL |
centre line |
ICAO |
|
CL |
closing station |
GEN |
|
CL |
course line |
ATC |
|
CLA |
clear type of ice formation |
ICAO |
|
CLB |
climb |
ATC |
|
CLBI |
climb immediately |
ATC |
|
CLBN |
crash locator beacon |
GEN |
|
CLBR |
calibration |
ICAO |
|
CLD |
cloud |
NWS |
|
CLG |
calling |
ICAO |
|
CLKOB |
clockwise orbit |
ATC |
|
CLKWS |
clockwise |
GEN |
|
CLN |
colon |
GEN |
|
CLNC |
clearance |
GEN |
|
CLODA |
closing date |
GEN |
|
CLOTO |
close this office |
GEN |
|
CLR |
clears, or cleared to, or clearance |
ICAO |
|
CLRAP |
cleared as planned |
ATC |
|
CLRS |
clear and smooth |
NWS |
|
CLSD |
closed |
ICAO |
|
CLST |
celestial |
ATC |
|
CLU |
circuit line up |
GEN |
|
CM |
centimeter |
ICAO |
|
CMA |
comma |
GEN |
|
CMB |
climb to or climbing to |
ICAO |
|
CMNC |
commence |
GEN |
|
CMPCT |
compact |
GEN |
|
CMPL |
complete or completed or completion |
ICAO |
|
CMPLT |
complete |
GEN |
|
CMPLX |
complex |
GEN |
|
CMPSN |
composition |
GEN |
|
CMPT |
component |
GEN |
|
CMS |
construction maintenance supervisor |
GEN |
|
CMSN |
commission |
GEN |
|
CNCL |
cancel |
NWS |
|
CNCNT |
concurrently |
GEN |
|
CNCT |
connect |
GEN |
|
CNDN |
Canadian |
NWS |
|
CNL |
cancel |
GEN |
|
CNLFP |
cancel flight plan |
ATC |
|
CNS |
communications, navigation and surveillance |
ICAO |
|
CNS |
Consolidated NOTAM System |
ATC |
|
CNSTNT |
consistent |
GEN |
|
CNTR |
center |
GEN |
|
CNTRL |
central |
GEN |
|
CNTRLN |
centerline |
GEN |
|
CNVG |
converge |
GEN |
|
CNVRT |
convert |
GEN |
|
CNVSN |
conversion |
GEN |
|
CNVTV |
convective |
NWS |
|
CO |
company |
GEN |
|
CO |
county |
GEN |
|
COB |
close of business |
GEN |
|
COC |
climb on course |
ATC |
|
COLL |
collect |
GEN |
|
COM |
communication |
ICAO |
|
COMB |
combine |
GEN |
|
COML |
commercial |
GEN |
|
COMLO |
compass locator |
GEN |
|
COMPR |
compare |
GEN |
|
COMPRT |
compartment |
GEN |
|
CONC |
concrete |
ICAO |
|
CONCA |
continue calling until |
ATC |
|
COND |
condition |
ICAO |
|
CONF |
confidential |
GEN |
|
CONFDC |
confidence |
NWS |
|
CONFIG |
configuration |
ATC |
|
CONFIGN |
configuration |
GEN |
|
CONR |
Continental NORAD Region |
GEN |
|
CONS |
continuous |
ICAO |
|
CONSO |
CONSOLAN Facility |
GEN |
|
CONSOL |
consol beacon |
GEN |
|
CONSOLAN |
low or medium frequency long range navigational aid |
GEN |
|
CONST |
construction |
ICAO |
|
CONT |
continue(s) or continued |
ICAO |
|
CONTDVD |
Continental Divide |
NWS |
|
CONTH |
continue to hold |
ATC |
|
CONTR |
contract |
GEN |
|
CONTRAILS |
condensation trails |
NWS |
|
COORD |
coordinate |
GEN |
|
COORD |
Coordinates |
ICAO |
|
COP |
changeover point |
GEN |
|
COPCOM |
Controllers Operations and Procedures Committee |
GEN |
|
COPT |
completed procedure turn |
ATC |
|
COR |
correct or corrected or correction |
GEN |
|
CORAS |
corridor assignment |
ATC |
|
COREQ |
confirming requisition follows |
GEN |
|
COT |
at the coast |
ICAO |
|
COV |
cover |
ICAO |
|
CP |
circular polarization |
GEN |
|
CPA |
crash phone activated |
GEN |
|
CPBL |
capable |
GEN |
|
CPD |
coupled |
GEN |
|
CPDLC |
Controller-pilot data link communications |
ICAO |
|
CPF |
complete power failure |
GEN |
|
CPL |
current flight plan |
ICAO |
|
CPME |
Calibration performance monitoring equipment |
GEN |
|
CPN |
air transport pulse radar navigation aid |
GEN |
|
CPS |
air transport pulse radar search |
GEN |
|
CPTY |
capacity |
GEN |
|
CRAD |
composite radar data processing |
GEN |
|
CRAF |
civil reserve air fleet |
GEN |
|
CRC |
circle |
GEN |
|
CRC |
Cyclic redundancy check |
ICAO |
|
CRCHF |
crew chief |
GEN |
|
CRLC |
circulate |
GEN |
|
CRS |
course |
GEN |
|
CRT |
cathode ray tube |
GEN |
|
CRTFY |
certify |
GEN |
|
CRYPTO |
cryptographic |
GEN |
|
CRZ |
cruise |
ICAO |
|
CRZAM |
cruise and maintain |
ATC |
|
CRZWTR |
cruise well to right |
ATC |
|
CS |
Call sign |
ICAO |
|
CS |
cirrostratus |
NWS |
|
CS/C |
combined station/center |
GEN |
|
CS/T |
combined station/tower |
GEN |
|
CSATR |
climb so as to reach |
ATC |
|
CSATX |
climb so as to cross |
ATC |
|
CSDR |
consider |
GEN |
|
CSDRBL |
considerable |
GEN |
|
CSLDT |
consolidate |
GEN |
|
CST |
coast |
NWS |
|
CTA |
control area |
ICAO |
|
CTAF |
common traffic advisory frequency |
ATC |
|
CTAM |
climb to and maintain |
ATC |
|
CTAS |
controlled airspace |
ATC |
|
CTAX |
climb to and cross |
ATC |
|
CTC |
contact |
ICAO |
|
CTCC |
change to center control or changing to center control |
ATC |
|
CTCC |
contact center control |
ATC |
|
CTCEN |
contact center |
ATC |
|
CTGY |
category |
NWS |
|
CTL |
control |
ICAO |
|
CTLA |
control area |
GEN |
|
CTLB |
control boundary |
GEN |
|
CTLR |
controller |
GEN |
|
CTLZ |
control zone |
GEN |
|
CTN |
caution |
GEN |
|
CTR |
control zone |
ICAO |
|
CTRAC |
common terminal radar approach control |
GEN |
|
CTSKLS |
Catskills |
NWS |
|
CU |
cumulus |
NWS |
|
CUF |
cumuliform |
ICAO |
|
CUFRA |
cumulus fractus |
NWS |
|
CUSNO |
customs has been notified |
GEN |
|
CUST |
customs |
ICAO |
|
CVFP |
cancel VFR flight plan |
ATC |
|
CVINO |
clearance void if not off |
ATC |
|
CVN |
convene |
GEN |
|
CVR |
Cockpit voice recorder |
ICAO |
|
CVR |
cover |
GEN |
|
CVRS |
computerized voice reservation system |
ATC |
|
CW |
continuous wave |
ICAO |
|
CWM |
change weight manifest |
GEN |
|
CWRC |
climb well to right of course |
ATC |
|
CWSU |
central weather service unit |
GEN |
|
CWTR |
climb well to right |
ATC |
|
CWY |
clearway |
ICAO |
|
CXA |
cancel approved arrival |
ATC |
|
CXD |
cancel approved departure |
ATC |
|
CYC |
cyclonic |
NWS |
|
CYCLGN |
cyclogenesis |
NWS |
|
CYL |
cylinder |
GEN |
|
CZM |
coastal zone management |
GEN |
,
D
|
Contraction |
Definition |
Usage |
|---|---|---|
|
D |
danger area |
ICAO |
|
DA |
decision altitude |
ICAO |
|
DA |
departure approved |
ATC |
|
DAAR |
deviation approved as requested |
ATC |
|
DABRK |
daybreak |
NWS |
|
DAE |
district airport engineer |
GEN |
|
DAIRE |
direct altitude and identification readout equipment |
GEN |
|
DALGT |
daylight |
GEN |
|
DAP |
do all possible |
GEN |
|
DAPD |
descend at pilot s discretion |
ATC |
|
DASI |
digital altimeter setting indicator |
GEN |
|
D-ATIS |
Data link Automatic Terminal Information Service |
ICAO |
| D-ATIS | Digital-Automatic Terminal Information Service | ATC |
|
DB |
decibel |
GEN |
|
DB |
describe |
GEN |
|
DBA |
doing business as |
GEN |
|
DBASI |
digital barometer altimeter setting indicator |
GEN |
|
DBL |
double |
GEN |
|
DBTF |
doubtful |
GEN |
|
DC |
direct current |
GEN |
|
DCA |
Defense Communications Agency |
GEN |
|
DCAVU |
clear or scattered clouds and visibility greater than ten, remainder of report missing (weather reports only) |
NWS |
|
DCD |
double channel duplex |
ICAO |
|
DCF |
deputy chief |
GEN |
|
DCKG |
docking |
ICAO |
|
DCLRT |
decelerate |
ATC |
|
DCM |
defense combat maneuvers |
ATC |
|
DCMSN |
decommission |
GEN |
|
DCMT |
document |
GEN |
|
DCPC |
Direct controller-pilot communications |
ICAO |
|
DCR |
decrease |
GEN |
|
DCRZ |
descend to and cruise |
ATC |
|
DCS |
defense communications system |
GEN |
|
DCS |
double channel simplex |
GEN |
|
DCT |
direct |
ICAO |
|
DDM |
difference in depth of modulation |
GEN |
|
DE |
From (used to precede the call sign of the calling station) |
ICAO |
|
DECCO |
Defense Commercial Communications Office |
GEN |
|
DEF |
defense |
GEN |
|
DEFCON |
Defense Readiness Conditions |
GEN |
|
DEG |
degree |
ICAO |
|
DELPHO |
deliver by telephone |
GEN |
|
DEMOL |
demolition |
GEN |
|
DENEB |
fog dispersal operations |
ICAO |
|
DEP |
depart |
ATC |
|
DEP |
departure |
ICAO |
|
DEPT |
department |
GEN |
| DER | departure end of runway | ICAO |
|
DES |
descend to or descending to |
ICAO |
|
DESTN |
destination |
GEN |
|
DETRESFA |
Distress Phase Code (Alerting Service) |
ATC |
|
DEV |
deviation |
ATC |
|
DEW |
distant early warning |
GEN |
|
DEWIZ |
distant early warning identification zone |
GEN |
|
DFCLT |
difficult |
GEN |
|
DFDR |
Digital flight data recorder |
ICAO |
|
DFL |
daily flight log |
GEN |
|
DFNT |
definite |
GEN |
|
DFRS |
differs |
GEN |
|
DFTI |
distance from touchdown indicator |
GEN |
|
DFUS |
diffuse |
GEN |
|
DGCGO |
dangerous cargo |
GEN |
|
DGNL |
diagonal |
GEN |
|
DGR |
danger |
GEN |
|
DH |
decision height |
ICAO |
|
DI |
delay indefinite |
ATC |
|
DI |
departure approval request for IFR flight |
ATC |
|
DIAM |
diameter |
GEN |
|
DIF |
diffuse |
ICAO |
|
DIR |
director |
GEN |
|
DISABLD |
disabled |
GEN |
|
DISC |
discontinue |
GEN |
|
DISEM |
disseminate |
GEN |
|
DIST |
distance |
ICAO |
|
DIST |
district |
GEN |
|
DISTR |
distribute |
GEN |
|
DIV |
divert |
ICAO |
|
DIV |
division |
GEN |
|
DKTS |
Dakotas |
NWS |
|
DLA |
delay or delayed |
ICAO |
|
DLAC |
delay account of |
ATC |
|
DLAT |
delay time |
ATC |
|
DLC |
delay clearance or delayed clearance |
ATC |
|
DLIC |
Data link initiation capability |
ICAO |
|
DLT |
delete |
GEN |
|
DLVR |
deliver |
GEN |
|
DLVY |
delivery |
GEN |
|
DLY |
daily |
GEN |
|
DLY |
Daily |
ICAO |
|
DMAAC |
Defense Mapping Agency Aerospace Center |
GEN |
|
DMAHC |
Defense Mapping Agency Hydrographic Center |
GEN |
|
DME |
distance measuring equipment |
ICAO |
|
DMEG |
DME-collocated with glide slope |
GEN |
|
DMEL |
DME-collocated with localizer |
GEN |
|
DMER |
DME-tactical air navigation with DME only commissioned |
GEN |
|
DMEV |
DME-collocated with VOR |
GEN |
|
DMG |
damage |
GEN |
|
DMNT |
dominant |
GEN |
|
DMO |
Directives Management Officer, FAA |
GEN |
|
DMSH |
diminish |
NWS |
|
DMSTN |
demonstration |
GEN |
|
DNA |
Defense Nuclear Agency |
GEN |
|
DNG |
danger |
ICAO |
|
DNS |
dense |
NWS |
|
DNSLP |
downslope |
NWS |
|
DNSTRM |
downstream |
NWS |
|
DNWND |
downwind |
ATC |
|
DO |
Deputy Commander for Operations |
GEN |
|
DO |
ditto |
GEN |
|
DOB |
date of birth |
GEN |
|
DOC |
Department of Commerce |
GEN |
|
DOD |
Department of Defense |
GEN |
|
DOE |
Department of Energy |
GEN |
|
DOLLY |
data link |
GEN |
|
DOM |
domestic |
ICAO |
|
DOT |
Department of Transportation |
GEN |
|
DOT-1 |
Transport One-Secretary of Transportation |
ATC |
|
DOT-2 |
Transport Two-Deputy Secretary of Transportation |
ATC |
|
DP |
deep |
NWS |
|
DP |
dew point temperature |
ICAO |
|
DPCR |
departure procedure |
ATC |
|
DPNG |
deepening |
NWS |
|
DPT |
depth |
ICAO |
|
DPTH |
depth |
NWS |
|
DR |
dead reckoning |
ATC |
|
DR |
direct route |
GEN |
|
DR |
low drifting |
METAR |
|
DRCT |
direct |
GEN |
|
DRCTN |
direction |
GEN |
|
DRDU |
low drifting dust |
METAR |
|
DRFT |
drift |
NWS |
|
DRG |
during |
ICAO |
|
DRIR |
direct readout infrared |
GEN |
|
DRMS |
Distance Root Mean Square |
ATC |
|
DRR |
Deployment Readiness Review |
ATC |
|
DRSA |
low drifting sand |
METAR |
|
DRSN |
low drifting snow |
METAR |
|
DRZL |
drizzle |
NWS |
|
DS |
domestic services (island operations) |
GEN |
|
DS |
dust storm |
METAR |
|
DSATR |
descend so as to reach |
ATC |
|
DSATX |
descend so as to cross |
ATC |
|
DSB |
double sideband |
ICAO |
|
DSCNT |
descent |
ATC |
|
DSGND |
designated |
GEN |
|
DSIPT |
dissipate |
NWS |
|
DSN |
Defense Switching Network |
GEN |
|
DSND |
descend |
ATC |
|
DSNDI |
descend immediately |
ATC |
|
DSNT |
distant |
GEN |
|
DSPL |
display |
GEN |
|
DSPLC |
displace |
GEN |
|
DSPN |
disposition |
GEN |
|
DSPRL |
dispersal |
GEN |
|
DSR |
desire |
GEN |
|
DSRGD |
disregard |
GEN |
|
DST |
distort |
GEN |
|
DSTC |
distance |
GEN |
|
DSTND |
destined |
ATC |
|
DTAM |
descend to and maintain |
ATC |
|
DTAX |
descend to and cross |
ATC |
|
DTE |
data terminal equipment |
GEN |
|
DTF |
data transmission feature |
GEN |
|
DTG |
date time group |
GEN |
|
DTHR |
Displaced runway threshold |
ICAO |
|
DTL |
detail |
GEN |
|
DTLN |
international dateline |
NWS |
|
DTR |
data transmission request |
GEN |
|
DTRM |
determine |
GEN |
|
DTRT |
deteriorate |
NWS |
|
DTS |
Diplomatic Telecommunications Service |
GEN |
|
DTW |
dual tandem wheels |
ICAO |
|
DU |
widespread dust |
METAR |
|
DUATS |
direct user access terminal system |
GEN |
|
DUC |
dense upper cloud |
ICAO |
|
DUPE |
duplicate |
GEN |
|
DUPE |
This is a duplicate message (to be used in AFS as a procedure signal) |
ICAO |
|
DUR |
duration |
ICAO |
|
DURC |
during climb |
ATC |
|
DURD |
during descent |
ATC |
|
DURG |
during |
GEN |
|
DURN |
duration |
GEN |
|
DV |
distinguished visitors |
GEN |
|
DVFR |
defense VFR |
GEN |
|
DVLP |
develop |
GEN |
|
D-VOLMET |
Data link VOLMET |
ICAO |
|
DVOR |
doppler VHF omni-directional radio range |
ICAO |
|
DVRG |
diverge |
GEN |
|
DVRSN |
diversion |
GEN |
|
DVV |
downward vertical velocity |
NWS |
|
DW |
dual wheels |
ICAO |
|
DWG |
drawing |
GEN |
|
DWNDFTS |
downdrafts |
NWS |
|
DWPNT |
dew point |
NWS |
|
DWRC |
descend well to right of course |
ATC |
|
DWTR |
descend well to right |
ATC |
|
DX |
duplex |
GEN |
|
DZ |
drizzle |
ICAO |
,
E
|
Contraction |
Definition |
Usage |
|---|---|---|
|
E |
east or eastern longitude |
ICAO |
|
E |
Eastern Standard Time (time groups only) |
NWS |
|
E |
ending of precipitation (time in minutes) (weather reports only) |
NWS |
|
E |
equatorial (air mass) |
NWS |
|
E/G |
engine-generator |
GEN |
|
E/R |
exchange and repair |
GEN |
|
EACLN |
expect approach clearance |
ATC |
|
EACNL |
expect approach clearance not later than |
ATC |
|
EADIZ |
entering air defense identification zone |
ATC |
|
EARTS |
en route automated radar tracking system |
GEN |
|
EAS |
equivalent airspeed |
ATC |
|
EAT |
expected approach time |
ATC |
|
EB |
eastbound |
ICAO |
|
EBND |
eastbound |
GEN |
|
ECA |
enter control area |
ATC |
|
ECAS |
enter controlled airspace |
ATC |
|
ECD |
except change departure to read |
ATC |
|
ECM |
electronic counter measures |
GEN |
|
ECMSN |
electronic counter measure mission |
ATC |
|
ECOM |
en route communications |
GEN |
|
ECR |
except change route to read |
ATC |
|
ECSP |
electronic specialist |
GEN |
|
EDA |
early departure authorized |
GEN |
|
EDC |
expect departure clearance at |
ATC |
|
EDCT |
estimated departure clearance (time) |
ATC |
|
EDR |
expect departure release at |
ATC |
|
EEE |
Error (to be used in AFS as a procedure signal) |
ICAO |
|
EEM |
electronic equipment modification |
GEN |
|
EENGR |
electrical engineer |
GEN |
|
EEP |
end exercise point |
GEN |
|
EET |
estimated elapsed time |
ICAO |
|
EFA |
entire field available |
GEN |
|
EFC |
expect further clearance at |
ATC |
|
EFCT |
effect |
GEN |
|
EFF |
effective |
GEN |
|
EFR |
expect further routing |
ATC |
|
EFTO |
encrypt for transmission only |
GEN |
|
EG |
emergency gear |
GEN |
|
EGECON |
electronic geographic coordinator navigation system |
GEN |
|
EHA |
expect higher altitude |
ATC |
|
EHF |
extremely high frequency (30000 to 300000 MHz) |
ICAO |
|
EIT |
electronic installation technician |
GEN |
|
ELAT |
estimated latitude |
GEN |
|
ELBA |
emergency location beacon - aircraft |
ICAO |
|
ELEC |
electric |
GEN |
|
ELECN |
electrician |
GEN |
|
ELEV |
elevate or elevation |
ICAO |
|
ELIP |
elliptical |
GEN |
|
ELMT |
electronic mechanic technician |
GEN |
|
ELNGT |
elongate |
NWS |
|
ELONG |
estimated longitude |
GEN |
|
ELR |
extra long range |
ICAO |
|
ELSW |
elsewhere |
GEN |
|
ELT |
emergency locator transmitter |
GEN |
|
EM |
emission |
ICAO |
|
EMBD |
embedded (in cloud layer) |
ICAO |
|
EMBDD |
embedded |
NWS |
|
EMDO |
Engineering and Manufacturing District Office |
GEN |
|
EMERG |
emergency |
ICAO |
|
EMI |
electronic maintenance inspector |
GEN |
|
EMSU |
environment meteorological support unit |
NWS |
|
EMT |
electronic maintenance technician |
GEN |
|
ENCTR |
encounter |
GEN |
|
END |
stop-end (related to RVR) |
ICAO |
|
ENDCE |
endurance |
GEN |
|
ENDG |
ending |
GEN |
|
ENE |
east-north east |
ICAO |
|
ENERN |
east-northeastern (weather reports only) |
NWS |
|
ENEWD |
east-northeastward (weather reports only) |
NWS |
|
ENG |
engine |
ICAO |
|
ENGR |
engineer |
GEN |
|
ENHNCD |
enhanced |
GEN |
|
ENHNCMNT |
enhancement |
GEN |
|
ENR |
en-route |
ICAO |
|
ENRC |
En-route chart (followed by name/title) |
ICAO |
|
ENRT |
en route |
GEN |
|
ENTR |
entire |
GEN |
|
EOBT |
estimated off-block time |
ICAO |
|
EOD |
entered on duty |
GEN |
|
EOF |
expected operations forecast |
NWS |
|
EP |
en route penetration |
ATC |
|
EPI |
expanded position indicator |
ATC |
|
EQCRT |
equipment certified |
GEN |
|
EQPT |
equipment |
ICAO |
|
EQUIP |
equipment |
GEN |
|
ER |
here |
ICAO |
|
ERAD |
en route radar (broadband) |
GEN |
|
ERMG |
en route metering |
ATC |
|
ERSP |
en route spacing program |
ATC |
|
ERY |
early |
GEN |
|
ESCAT |
emergency security control of air traffic |
GEN |
|
ESE |
east-south east |
ICAO |
|
ESEC |
en route secondary radar beacon (broadband) |
GEN |
|
ESERN |
east-southeastern (weather reports only) |
NWS |
|
ESEWD |
east-southeastward (weather reports only) |
NWS |
|
ESNTL |
essential |
GEN |
|
ESP |
en route sequencing program |
ATC |
|
EST |
estimate or estimation |
ICAO |
|
ESTAB |
establish |
GEN |
|
ESV |
expanded service volume |
GEN |
|
ET |
electronic technician |
GEN |
|
ETA |
estimated time of arrival |
GEN |
|
ETARS |
en route tracking automatic radar service |
ATC |
|
ETC |
et cetera |
GEN |
|
ETD |
estimated time of departure |
GEN |
|
ETE |
estimated time en route |
GEN |
|
ETFL |
each thousand foot level |
ATC |
|
ETI |
estimated information |
ATC |
|
ETIM |
elapsed time |
ATC |
|
ETO |
estimated time over significant point |
ICAO |
|
ETOV |
estimated time over |
ATC |
|
ETP |
estimated time of penetration |
ATC |
|
ETR |
eastern test range |
ATC |
|
EU |
electronic unit |
GEN |
|
EUO |
emergency use only |
GEN |
|
EV |
every |
ICAO |
|
EVAC |
evacuation |
GEN |
|
EVAL |
evaluate or evaluation |
GEN |
|
EVE |
evening |
GEN |
|
EVS |
electronic voice switching system |
GEN |
|
EVT |
expect vector to |
ATC |
|
EXAM |
examination |
GEN |
|
EXC |
except |
ICAO |
|
EXCH |
exchange |
GEN |
|
EXCLD |
exclude |
GEN |
|
EXCLV |
exclusive |
GEN |
|
EXCP |
except |
GEN |
|
EXCT |
execute |
GEN |
|
EXDLVY |
expedite delivery |
GEN |
|
EXEC |
executive |
GEN |
|
EXEC-1 |
President on board civil aircraft |
GEN |
|
EXEC-1F |
President s family is aboard aircraft |
GEN |
|
EXEC-2 |
Vice President is aboard civil aircraft |
GEN |
|
EXEC-2F |
Vice President s family is aboard aircraft |
GEN |
|
EXER |
exercise |
ICAO |
|
EXP |
expect |
ICAO |
|
EXPC |
expect |
GEN |
|
EXPED |
expedite |
GEN |
|
EXPHO |
expedite delivery by telephone |
GEN |
|
EXPS |
express |
GEN |
|
EXQF |
expanded quota flow |
ATC |
|
EXREP |
expedite mail reply |
GEN |
|
EXSEC |
extra section |
GEN |
|
EXSHI |
expedite shipment |
GEN |
|
EXTD |
extend |
GEN |
|
EXTN |
extension |
GEN |
|
EXTRAP |
extrapolate |
NWS |
|
EXTRM |
extreme |
NWS |
|
EXTSV |
extensive |
GEN |
,
F
|
Contraction |
Definition |
Usage |
|---|---|---|
|
F |
Cleared to fix |
ATC |
|
F |
fahrenheit |
GEN |
|
F |
flight inspection |
GEN |
|
FA |
area forecast |
NWS |
|
FA |
fuel advisory |
ATC |
|
FA |
final approach |
ATC |
|
FA CENTER |
Aviation Area Forecast Center |
GEN |
|
FAA |
Federal Aviation Administration |
GEN |
|
FAA |
for an approach to |
ATC |
|
FAA-1 |
SafeAir One-Federal Aviation Administration Administrator |
ATC |
|
FAA-2 |
SafeAir Two-Federal Aviation Administration Deputy Administrator |
ATC |
|
FAAP |
federal aid to airports program |
GEN |
|
FAAR |
FAA requirements |
GEN |
|
FAC |
facilities |
ICAO |
|
FAC |
facility |
GEN |
|
FACF |
facility chief |
GEN |
|
FACSFAC |
Fleet Area Controlled and Surveillance Facility |
ATC |
|
FAD |
fuel advisory departure |
GEN |
|
FAF |
final approach fix |
ICAO |
|
FAFAB |
FSS assumes flight-plan area and Service B |
GEN |
|
FAH |
fahrenheit |
NWS |
|
FAL |
facilitation of international air transport |
ICAO |
|
FAM |
familiar or familiarization |
GEN |
|
FAMAE |
following amendment authorized effective |
GEN |
|
FAP |
final approach point |
ICAO |
|
FAR |
Federal Aviation Regulations |
GEN |
|
FATFL |
FSS assumes control of tower frequencies and lights |
GEN |
|
FAX |
facsimile |
GEN |
|
FBO |
fixed-base operator |
GEN |
|
FC |
funnel cloud |
METAR |
|
FCA |
frequency change approved |
ATC |
|
FCC |
Federal Communications Commission |
GEN |
|
FCFSS |
FAA Contract Flight Service Station |
GEN |
|
FCO |
facility coordination officer |
GEN |
|
FCRP |
field condition report |
ATC |
|
FCST |
forecast |
GEN |
|
FCTA |
flow control time of arrival |
ATC |
|
FCWOS |
FAA Contract Weather Observing Station |
GEN |
|
FDAT |
flight data |
GEN |
|
FDC |
Flight Data Center |
GEN |
|
FDDL |
frequency division data link |
GEN |
|
FDEP |
flight data entry and printout |
ATC |
|
FDI |
Fault Detection and Isolation |
ATC |
|
FDIO |
flight data input/output |
ATC |
|
FDIOR |
flight data input/output repeater |
ATC |
|
FDPS |
Flight data processing system |
ICAO |
|
FE |
flight engineer |
GEN |
|
FENKN |
fuel supply unknown |
ATC |
|
FENTL |
fuel supply until |
ATC |
|
FEW |
1 or 2 octas (eighths) cloud coverage |
METAR |
|
FEXHA |
fuel supply exhausted |
ATC |
|
FFC |
for further clearance |
ATC |
|
FFLT |
familiarization flight |
GEN |
|
FFMN |
fixed federal monitoring network |
GEN |
|
FG |
fog |
METAR |
|
FGSB |
FSS guarding Service B |
GEN |
|
FI/P |
flight information (permanent) |
GEN |
|
FI/T |
flight information (temporary) |
GEN |
|
FIBI |
filed but impracticable to transmit |
NWS |
|
FIC |
Flight Information Center |
GEN |
|
FICON |
field condition |
GEN |
|
FIDO |
Flight Inspection District Office |
GEN |
|
FIFO |
Flight Inspection Field Office |
GEN |
|
FIFO-H |
Flight Inspection Field Office - High Altitude |
GEN |
|
FIFP |
filed IFR flight plan |
ATC |
|
FIG |
figure |
GEN |
|
FIG |
flight inspection group |
GEN |
|
FIL |
filament |
GEN |
|
FILG |
filling |
NWS |
|
FILS |
florescan instrument landing system |
GEN |
|
FINO |
weather report will not be filed for transmission |
NWS |
|
FIR |
Flight Information Region |
GEN |
|
FIRAV |
first available |
GEN |
|
FIRB |
Flight Information Region Boundary |
GEN |
|
FIRG |
firing |
GEN |
|
FIRIV |
arrival report will be filed with |
ATC |
|
FIS |
flight information service |
GEN |
|
FISA |
automated flight information service |
ICAO |
|
FL |
flash advisory |
NWS |
|
FL |
flight level |
GEN |
|
FLCTN |
fluctuation |
GEN |
|
FLD |
field |
ICAO |
|
FLDST |
flood stage |
NWS |
|
FLG |
falling |
NWS |
|
FLG |
flashing |
ICAO |
|
FLIDAP |
flight data position |
GEN |
|
FLIP |
flight information publication |
GEN |
|
FLORL |
fluorescent runway lighting (floodlight system) |
GEN |
|
FLR |
flares |
ICAO |
|
FLRY |
flurry |
NWS |
|
FLT |
flight |
ICAO |
|
FLTCK |
flight check |
ICAO |
|
FLTO |
flight orders |
GEN |
|
FLTWO |
flight watch outlet |
GEN |
|
FLUC |
fluctuating |
ICAO |
|
FLW |
follow |
GEN |
|
FLWIS |
flood warning issued |
NWS |
|
FM |
fan marker |
GEN |
|
FM |
from |
ICAO |
|
FMAP |
fan marker approach |
ATC |
|
FMH |
fan marker located with radio beacon |
GEN |
|
FMO |
frequency management officer |
GEN |
|
FMS |
Flight management system |
ICAO |
|
FMT |
format |
GEN |
|
FMU |
flow management unit |
ICAO |
|
FNA |
final approach |
ICAO |
|
FNCTN |
function |
GEN |
|
FNT |
Front |
NWS |
|
FNTGNS |
frontogenesis |
NWS |
|
FNTLYS |
frontolysis |
NWS |
|
FOB |
fuel on board |
GEN |
|
FOD |
foreign object debris |
GEN |
|
FONE |
telephone |
GEN |
|
FORNN |
forenoon |
NWS |
|
FP |
flight plan |
GEN |
|
FPA |
flight plan area |
ATC |
|
FPB |
flight progress board |
ATC |
|
FPDI |
flight path deviation indicator |
GEN |
|
FPL |
filed flight plan |
ICAO |
|
FPL |
full performance level |
ATC |
|
FPM |
feet per minute |
GEN |
|
FPN |
fixed pulse radar navigation aid |
GEN |
|
FPNO |
flight plan not received |
GEN |
|
FPP |
from present position |
ATC |
|
FPR |
flight plan route |
GEN |
|
FPRC |
for possible reclearance |
ATC |
|
FPWA |
further particulars when available |
ATC |
|
FQT |
frequent |
GEN |
|
FR |
fuel remaining |
GEN |
|
FRC |
full route clearance |
GEN |
|
FRD |
fix-radial-distance |
ATC |
|
FREQ |
frequency |
ICAO |
|
FRFAB |
FSS returns flight-plan area and Service B |
GEN |
|
FRH |
fly runway heading |
ATC |
|
FRI |
Friday |
ICAO |
|
FRM |
form |
GEN |
|
FRMG |
forming |
NWS |
|
FRMN |
formation |
GEN |
|
FRNG |
firing |
ICAO |
|
FROPA |
frontal passage |
NWS |
|
FROSFC |
frontal surface |
NWS |
|
FRQ |
frequent |
ICAO |
|
FRSB |
FSS returns Service B |
GEN |
|
FRST |
frost |
NWS |
|
FRTFL |
FSS returns control of tower frequencies and lights |
GEN |
|
FRWF |
forecast wind factor |
NWS |
|
FRZ |
freeze |
NWS |
|
FRZLVL |
freezing level |
NWS |
|
FRZN |
frozen |
NWS |
|
FSDO |
Flight Standards District Office |
GEN |
|
FSL |
full stop landing |
ICAO |
|
FSM |
flight schedule monitor |
ATC |
|
FSNFO |
Flight Standards National Field Office |
GEN |
|
FSP |
flight strip printer |
GEN |
|
FSS |
Flight Service Station |
ICAO |
|
FST |
first |
ICAO |
|
FT |
feet |
ICAO |
|
FT |
filing time |
GEN |
|
FT |
foot |
GEN |
|
FTAR |
following transmitted as received (message handling) |
GEN |
|
FTHR |
farther or further |
GEN |
|
FTHRD |
feathered |
ATC |
|
FTS |
Federal Telecommunications System |
GEN |
|
FU |
smoke |
METAR |
|
FURN |
furnish |
GEN |
|
FV |
forward visibility (miles) |
ATC |
|
FVFP |
filed VFR flight plan |
ATC |
|
FW/SIFR |
fixed wing special IFR |
GEN |
|
FW/SVFR |
fixed wing special VFR |
GEN |
|
FWA |
flight watch area |
GEN |
|
FWC |
Fleet Weather Central |
NWS |
|
FWCS |
flight watch control station |
GEN |
|
FWD |
forward |
GEN |
|
FWDC |
forward collect |
GEN |
|
FWP |
flight watch point |
GEN |
|
FWRNG |
fire warning |
GEN |
|
FWS |
flight watch specialist |
GEN |
|
FWU |
flight watch unit |
GEN |
|
FYI |
for your information |
GEN |
|
FZ |
supercooled/freezing |
METAR |
|
FZDZ |
freezing drizzle |
METAR |
|
FZFG |
freezing fog |
METAR |
|
FZRA |
freezing rain |
METAR |
|
FZRANO |
freezing rain sensor not available |
METAR |
,
G
|
Contraction |
Definition |
Usage |
|---|---|---|
|
G |
Green |
ICAO |
|
G |
gusts reaching (knots) (weather reports only) |
NWS |
|
G/A |
ground to air |
ICAO |
|
G/A/G |
ground to air and air to ground |
ICAO |
|
GA |
general aviation |
ICAO |
|
GA |
glide angle |
GEN |
|
GA |
Go ahead, resume sending (to be used in AFS as a procedure signal) |
ICAO |
|
GADO |
General Aviation District Office |
GEN |
|
GALS |
gallons |
ATC |
|
GBA |
give better address |
GEN |
|
GBAS |
ground-based augmentation system |
ICAO |
|
GBL |
government bill of lading |
GEN |
|
GBR |
give better reference |
GEN |
|
GC |
ground control |
GEN |
|
GCA |
ground control approach |
ICAO |
|
GCI |
ground control intercept |
GEN |
|
GCO |
ground communication outlet |
ATC |
|
GDP |
ground delay program |
ATC |
|
GDPGM |
Ground Delay Program |
ATC |
|
GEN |
general |
GEN |
|
GENOT |
general notice |
GEN |
|
GEO |
geographic |
GEN |
|
GEOREF |
geographical reference |
GEN |
|
GES |
ground earth station |
ICAO |
|
GHZ |
gigahertz |
GEN |
|
GIC |
GPS Integrity Channel |
ATC |
|
GICG |
glaze icing |
NWS |
|
GLD |
glider |
ICAO |
|
GLDR |
glider |
GEN |
|
GLFALSK |
Gulf of Alaska |
NWS |
|
GLFCAL |
Gulf of California |
NWS |
|
GLFMEX |
Gulf of Mexico |
NWS |
|
GLFSTLAWR |
Gulf of St. Lawrence |
NWS |
|
GLONASS |
global navigation satellite system |
ICAO |
|
GLONASS |
Global orbiting navigation satellite system |
ICAO |
|
GLS |
GBAS Landing System |
ICAO |
|
GMC |
Ground movement chart (followed by name/title) |
ICAO |
|
GMT |
Greenwich Mean Time |
GEN |
|
GND |
ground |
ICAO |
|
GNDCK |
ground check |
ICAO |
|
GNDFG |
ground fog |
NWS |
|
GNSS |
global navigation satellite system (in general) |
ICAO |
|
GNTR |
generator |
GEN |
|
GOV |
Governor |
GEN |
|
GOVT |
government |
GEN |
|
GP |
glide path |
ICAO |
| GPA | glide path angle | ICAO |
|
GPI |
ground point of intercept |
ATC |
|
GPS |
global positioning system |
ICAO |
|
GQA |
get quick answer |
GEN |
|
GR |
hail (greater than 3/4 ) |
METAR |
|
GRAD |
gradient |
NWS |
|
GRADU |
gradual |
ICAO |
|
GRASS |
grass landing area |
ICAO |
|
GRBL |
garble |
GEN |
|
GRBNKS |
Grand Banks |
NWS |
|
GRDL |
gradual |
NWS |
|
GRID |
grid point values of processed meteorological data |
ICAO |
|
GRTLKS |
Great Lakes |
NWS |
|
GRVL |
gravel |
ICAO |
|
GS |
glide slope |
GEN |
|
GS |
Ground stop |
ATC |
|
GS |
Ground speed |
ATC |
|
GS |
snow pellets/small hail (less than 1/4 ) |
METAR |
|
GSA |
General Services Administration |
GEN |
|
GSDO |
General Safety District Office |
GEN |
|
GSI |
General safety inspector |
GEN |
|
GSTS |
Gusts |
NWS |
|
GSTY |
gusty |
NWS |
|
GTC |
gain time control |
ATC |
|
GTCL |
Great Circle |
GEN |
|
GTR |
greater |
GEN |
|
GUND |
Geoid undulation |
ICAO |
|
GV |
ground visibility |
NWS |
|
GVG |
giving |
GEN |
|
GVH |
government vehicle |
GEN |
|
GWT |
gross weight |
GEN |
,
H
|
Contraction |
Definition |
Usage |
|---|---|---|
|
H24 |
continuous 24-hour service |
ICAO |
|
HAA |
height above airport |
GEN |
|
HADA |
Hawaiian Defense Area |
GEN |
|
HADD |
Hawaiian Air Defense Division |
GEN |
|
HADIZ |
Hawaiian Air Defense Identification Zone |
GEN |
|
HAL |
height above landing |
GEN |
|
HANG |
Hawaiian Air National Guard |
GEN |
|
HAPI |
holding as previously instructed |
ATC |
|
HARS |
hazardous area reporting service |
ATC |
|
HAT |
height above touchdown |
GEN |
|
HAZ |
hazard |
GEN |
|
HAZMAT |
hazardous material |
ICAO |
|
HB |
homing beacon |
ATC |
|
HBN |
hazard beacon |
ICAO |
|
HCVIS |
high clouds visible |
NWS |
|
HDATZ |
high density traffic zones |
ATC |
|
HDF |
high frequency direction finding station |
ICAO |
|
HDFRZ |
hard freeze |
NWS |
|
HDG |
heading |
ICAO |
|
HDOP |
Horizontal Dilution of Precision |
ATC |
|
HDSVLY |
Hudson Valley |
NWS |
|
HDTA |
high density traffic airport |
GEN |
|
HDWND |
headwind |
ATC |
|
HEAD |
Head of State status |
ICAO |
|
HEL |
helicopter |
ICAO |
|
HELI |
heliport |
GEN |
|
HF |
high frequency |
GEN |
|
HFR |
hold for release |
ATC |
|
HGT |
height |
ICAO |
|
HHE |
household effects |
GEN |
|
HI |
high |
NWS |
|
HIALS |
high intensity approach light system |
GEN |
|
HIBAL |
high altitude balloon |
GEN |
|
HIEAT |
highest temperature equaled for all time |
NWS |
|
HIEFM |
highest temperature equaled for the month |
NWS |
|
HIESE |
highest temperature equaled so early |
NWS |
|
HIESL |
highest temperature equaled so late |
NWS |
|
HIFOR |
high level forecast |
NWS |
|
HIRIV |
how will arrival report be filed concerning |
ATC |
|
HIRL |
high intensity runway lights |
GEN |
|
HITMP |
highest temperature |
NWS |
|
HIWAS |
hazardous inflight weather advisory service |
GEN |
|
HIXAT |
highest temperature exceeded for all time |
NWS |
|
HIXFM |
highest temperature exceeded for the month |
NWS |
|
HIXSE |
highest temperature exceeded so early |
NWS |
|
HIXSL |
highest temperature exceeded so late |
NWS |
|
HJ |
sunrise to sunset |
ICAO |
|
HLDG |
holding |
ICAO |
|
HLF |
half |
GEN |
| HLP | heliport | ICAO |
|
HLSTO |
hailstones |
NWS |
|
HLTP |
hilltop |
NWS |
|
HN |
sunset to sunrise |
ICAO |
|
HND |
hundred |
GEN |
|
HNGR |
hangar |
GEN |
|
HO |
service available to meet operational requirements |
ICAO |
|
HOL |
holiday |
GEN |
|
HOP |
handoff point |
ATC |
|
HOP |
helicopter operations |
GEN |
|
HOSP |
hospital aircraft |
ICAO |
|
HOW |
handover word |
ATC |
|
HP |
holding pattern |
GEN |
|
HPA |
hectopascal |
ICAO |
|
HQ |
headquarters |
GEN |
|
HR |
here |
GEN |
|
HR |
hour |
ICAO |
|
HRZN |
horizon |
GEN |
|
HS |
service available during scheduled operations |
ICAO |
|
HTN |
heterodyne |
GEN |
|
HTR |
heater |
GEN |
|
HUM |
humanitarian mission |
ICAO |
|
HURCN |
hurricane |
ICAO |
|
HUREP |
hurricane report |
NWS |
|
HV |
high voltage |
GEN |
|
HVDF |
high and very high frequency direction finding stations |
ICAO |
|
HVY |
heavy |
ICAO |
|
HWVR |
however |
GEN |
|
HWY |
highway |
GEN |
|
HX |
high index |
NWS |
|
HX |
no specific working hours |
ICAO |
|
HYD |
hydraulic |
GEN |
|
HYDRO |
hydrographic |
GEN |
|
HYR |
higher |
ICAO |
|
HZ |
haze |
METAR |
|
Hz |
hertz |
GEN |
,
I
|
Contraction |
Definition |
Usage |
|---|---|---|
|
I/IFR |
intermittent instruments |
ATC |
|
IAARC |
International Administrative Aeronautical Radio Conference |
GEN |
|
IAATCD |
if authorized by ATC, DME may be used |
ATC |
|
IAC |
instrument approach chart (followed by name/title) |
ICAO |
|
IAF |
initial approach fix |
ICAO |
|
IAO |
in and out of clouds |
ICAO |
|
IAP |
instrument approach procedure |
ICAO |
|
IAR |
intersection of air routes |
ICAO |
|
IAS |
indicated air speed |
ATC |
|
IATA |
International Air Transport Association |
GEN |
|
IATSC |
International Aeronautical Telecommunications Switching Center |
GEN |
|
IAW |
in accordance with |
GEN |
|
IBASF |
intervals between aircraft in stream type formation |
ATC |
|
IBN |
identification beacon |
ICAO |
|
IBND |
inbound |
ATC |
|
IC |
ice crystals (weather reports only) |
METAR |
|
IC |
icing (PIREP only) |
ATC |
|
ICAO |
International Civil Aviation Organization |
GEN |
|
ICD |
Interface Control Document |
ATC |
|
ICG |
icing |
NWS |
|
ICGIC |
icing in clouds |
NWS |
|
ICGICIP |
icing in clouds and precipitation |
NWS |
|
ICGIP |
icing in precipitation |
NWS |
|
ID |
identify or identifier |
ICAO |
|
IDAT |
interfacility data |
GEN |
|
IDENT |
identification |
ICAO |
|
IDP |
individual development plan |
GEN |
|
IF |
intermediate approach fix |
ICAO |
|
IF |
intermediate fix |
GEN |
|
IFAMP |
if approach missed proceed |
ATC |
|
IFF |
identification friend/foe |
ICAO |
|
IFHOL |
if holding |
ATC |
|
IFIM |
International Flight Information Manual |
GEN |
|
IFINS |
if instrument conditions encountered |
ATC |
|
IFO |
International Field Office |
GEN |
|
IFO |
interphone |
GEN |
|
IFONO |
interphone (service F) not operative |
GEN |
|
IFORO |
interphone (service F) resumed operation |
GEN |
|
IFPFP |
individual flight plans from this point |
ATC |
|
IFR |
instrument flight rules |
ICAO |
|
IFSS |
International Flight Service Station |
GEN |
|
IFUN |
if unable |
GEN |
|
IFVLS |
if flight visibility becomes less than |
ATC |
|
IFVR |
if visibility remains |
ATC |
|
IGA |
international general aviation |
ICAO |
|
IGIA |
Interagency Group on International Aviation |
GEN |
|
IIA |
if incorrect advise |
GEN |
|
IISD |
if incorrect service direct |
GEN |
|
ILAS |
instrument low approach |
ATC |
|
ILS |
instrument landing system |
ICAO |
|
ILSP |
ILS-partial |
GEN |
|
IM |
inner marker |
ICAO |
|
IMAP |
immediately after passing |
ATC |
|
IMC |
instrument meteorological conditions |
GEN |
|
IMDT |
immediate |
NWS |
|
IMF |
interrogation sign |
GEN |
|
IMG |
immigration |
ICAO |
|
IMI |
Intensity unknown (weather reports only) |
ICAO |
|
IMP |
impracticable |
GEN |
|
IMPL |
impulse |
GEN |
|
IMPR |
improve |
ICAO |
|
IMPT |
important |
GEN |
|
IMT |
immediate or immediately |
GEN |
|
IN |
inch |
ICAO |
|
INA |
initial approach |
ICAO |
|
INADQT |
inadequate |
GEN |
|
INATS |
interruption of air traffic services |
GEN |
|
INBD |
inbound |
ICAO |
|
INC |
in clouds |
ICAO |
|
INC |
incorporated |
GEN |
|
INCERFA |
uncertainty phase code (alerting service) |
ATC |
|
INCL |
include |
GEN |
|
INCLV |
inclusive |
GEN |
|
INCOMP |
incomplete |
GEN |
|
INCOR |
incorrect |
GEN |
|
INCR |
increase |
GEN |
|
INDC |
indicate |
GEN |
|
INDEF |
indefinite |
GEN |
|
INDUS |
industrial |
GEN |
|
INF |
inland navigation facility |
GEN |
|
INFO |
information |
ICAO |
|
INIT |
initial training |
GEN |
|
INLD |
inland |
NWS |
|
INOF |
if not off |
GEN |
|
INOP |
inoperative |
ICAO |
|
INP |
if not possible |
GEN |
|
INPR |
in progress |
ICAO |
|
INREQ |
information request |
GEN |
|
INS |
inertial navigation system |
ICAO |
|
INSP |
inspect |
GEN |
|
INST |
instrument |
GEN |
|
INSTA |
instruments authorized |
ATC |
|
INSTA |
interstate |
GEN |
|
INSTBY |
instability |
NWS |
|
INSTL |
install |
GEN |
|
INSTR |
instruct |
GEN |
|
INSTR |
instrument |
ICAO |
|
INSUF |
insufficient scheduled time available |
GEN |
|
INSUF |
unable to finish |
GEN |
|
INT |
intersection |
ICAO |
|
INTCNTL |
intercontinental |
GEN |
|
INTCP |
intercept |
GEN |
|
INTD |
intend |
GEN |
|
INTER |
intermittent |
ICAO |
|
INTFC |
interference |
GEN |
|
INTL |
international |
ICAO |
|
INTMD |
intermediate |
GEN |
|
INTMT |
intermittent |
GEN |
|
INTNS |
intentions |
GEN |
|
INTR |
interior |
NWS |
|
INTRG |
interrogator |
ICAO |
|
INTRMTRGN |
Inter-Mountain Region |
NWS |
|
INTRP |
interrupt |
GEN |
|
INTS |
intense |
NWS |
|
INTSF |
intensify or intensifying |
ICAO |
|
INTSFY |
intensify |
NWS |
|
INTST |
intensity |
ICAO |
|
INTVL |
interval |
GEN |
|
INTXN |
intersection |
GEN |
|
INVES |
investigate |
GEN |
|
INVOF |
in the vicinity of |
ATC |
|
INVRN |
inversion |
NWS |
|
INVSTAR |
investigate and report |
GEN |
|
IOVC |
in overcast |
NWS |
|
IP |
initial point |
ATC |
|
IP |
instructor pilot |
GEN |
|
IP/HHCL |
initial point/H-hour control line |
ATC |
|
IPV |
improve |
GEN |
|
IR |
ice on runway |
NWS |
|
IR |
IFR military training route |
GEN |
|
IRAC |
Interdepartmental Radio Advisory Committee |
GEN |
|
IRAD |
inbound radial |
ATC |
|
IREG |
irregular |
GEN |
|
IRN |
Interface Revision Notices |
ATC |
|
IS |
island |
GEN |
|
ISA |
international standard atmosphere |
ICAO |
|
ISB |
independent sideband |
ICAO |
|
ISMGR |
Island Manager |
GEN |
|
ISMLS |
interim standard microwave landing system |
GEN |
|
ISOL |
isolate |
GEN |
|
ITCK |
issue time check |
ATC |
|
ITNRNT |
itinerant |
GEN |
|
ITRY |
itinerary |
GEN |
|
ITU |
International Telecommunications Union |
GEN |
|
IVFRC |
in VFR conditions |
ATC |
,
J
|
Contraction |
Definition |
Usage |
|---|---|---|
|
JAL |
jet approach landing charts |
GEN |
|
JATO |
jet assisted take-off |
ATC |
|
JAWYS |
join airways |
ATC |
|
J-BAR |
jet runway barrier |
ATC |
|
JCTN |
junction |
GEN |
|
JOUR |
journeyman |
GEN |
|
JP |
jet penetration |
ATC |
|
JPAP |
jet penetration approach |
ATC |
|
JTST |
jet stream |
ICAO |
|
JTSTR |
jet stream |
NWS |
,
K
|
Contraction |
Definition |
Usage |
|---|---|---|
|
K |
Cold (air mass) |
NWS |
|
KC |
kilocycles |
GEN |
|
KEPOA |
keep this office advised |
GEN |
|
KFRST |
killing frost |
NWS |
|
KG |
kilogram |
GEN |
|
KHZ |
kilohertz |
GEN |
|
KM |
kilometers |
GEN |
|
KMH |
kilometers per hour |
ICAO |
|
KPA |
kilopascal |
ICAO |
|
KT |
knots |
GEN |
|
KW |
kilowatt |
GEN |
,
L
|
Contraction |
Definition |
Usage |
|---|---|---|
|
L |
Left |
ICAO |
|
L |
Locator |
ICAO |
|
L |
Logistics |
GEN |
|
L/MF |
low/medium frequency |
GEN |
|
LA |
low approach |
ATC |
|
LAA |
local airport advisory |
GEN |
|
LAADR |
low altitude arrival/departure routing |
ATC |
|
LAAS |
Local Area Augmentation System |
ATC |
|
LAB |
laboratory |
GEN |
|
LABRDR |
labrador |
NWS |
|
LABS |
leased Service A/B system |
ATC |
|
LABS |
low altitude bombing system |
GEN |
|
LADP |
local airport deicing plan |
ATC |
|
LAM |
logical acknowledgement |
ICAO |
|
LAN |
inland |
ICAO |
|
LARCT |
last radio contact |
ATC |
|
LAT |
latitude |
ICAO |
|
LAWRS |
Limited Aviation Weather Reporting Station |
GEN |
|
LB |
left base |
ATC |
|
LB |
pounds (weight) |
GEN |
|
LC |
local control |
GEN |
|
LCA |
locally |
ICAO |
|
LCL |
local or locally |
GEN |
|
LCT |
locate |
GEN |
|
LCTMP |
little change in temperature |
NWS |
|
LD |
long distance |
GEN |
|
LDA |
landing distance available |
ICAO |
|
LDA |
localizer type directional aid |
ATC |
|
LDG |
landing |
ICAO |
|
LDI |
landing direction indicator |
ICAO |
|
LDIN |
lead in lighting system |
GEN |
|
LEN |
length |
ICAO |
|
LETFO |
letter follows |
GEN |
|
LF |
low frequency |
GEN |
|
LFC |
laminar flow control |
GEN |
|
LFNT |
low frequency intersection |
GEN |
|
LFR |
low frequency radio range |
GEN |
|
LFT |
lift |
NWS |
|
LGRNG |
long range |
NWS |
|
LGT |
light or lighting |
ICAO |
|
LGTD |
lighted |
ICAO |
|
LGWV |
long wave |
GEN |
|
LICOF |
land lines communications facilities |
GEN |
|
LIFR |
low IFR (weather reports only) |
NWS |
|
LIH |
light intensity high |
ICAO |
|
LIL |
light intensity low |
ICAO |
|
LIM |
light intensity medium |
ICAO |
|
LIN |
linearity |
GEN |
|
LIRL |
low intensity runway edge lights |
GEN |
|
LK |
lake |
NWS |
|
LKLY |
likely |
GEN |
|
LKTYP |
like type |
ATC |
|
LL |
landline |
GEN |
|
LLWAS |
low level wind shear alert system |
GEN |
|
LLWS |
low level wind shear |
GEN |
|
LLZ |
localizer (not associated with ILS) |
ICAO |
|
LM |
locator middle |
ICAO |
|
LMM |
compass locator at ILS middle marker |
GEN |
|
LMT |
limit |
GEN |
|
LMT |
Local Mean Time |
ICAO |
|
LN |
line |
GEN |
|
LNAV |
lateral navigation (from TERPS-A1) |
GEN |
|
LND |
Land |
GEN |
|
LNDG |
landing |
GEN |
|
LO |
liaison officer |
GEN |
|
LO |
outer locator |
ICAO |
|
LOA |
letter of agreement |
GEN |
|
LOC |
localizer |
ICAO |
|
LOCOR |
local coordinator |
GEN |
|
LODISNAV |
long distance navigation |
GEN |
|
LOEAT |
lowest temperature equaled for all time |
NWS |
|
LOEFM |
lowest temperature equaled for the month |
NWS |
|
LOESE |
lowest temperature equaled so early |
NWS |
|
LOESL |
lowest temperature equaled so late |
NWS |
|
LOM |
compass locator at ILS outer marker |
GEN |
|
LONG |
longitude |
ICAO |
|
LONGL |
longitudinal |
GEN |
|
LOP |
line of position |
GEN |
|
LORAC |
long range accuracy |
GEN |
|
LORAN |
long range air navigation system |
GEN |
|
LOTMP |
lowest temperature |
NWS |
|
LOXAT |
lowest temperature exceeded for all time |
NWS |
|
LOXFM |
lowest temperature exceeded for the month |
NWS |
|
LOXSE |
lowest temperature exceeded so early |
NWS |
|
LOXSL |
lowest temperature exceeded so late |
NWS |
|
LP |
left traffic pattern |
ATC |
|
LP |
linear polarization |
ATC |
|
LP |
liquid propane |
GEN |
|
LP |
localizer performance without vertical guidance |
GEN |
|
LPV |
localizer performance with vertical guidance |
ICAO |
|
LR |
The last message received by me was . |
ICAO |
|
LRA |
landing rights airport |
GEN |
|
LRCOM |
long range VHF/UHF communications |
GEN |
|
LRG |
large |
GEN |
|
LRG |
long range |
GEN |
|
LRS |
lake reporting service |
GEN |
|
LS |
left side |
ATC |
|
LS |
The last message sent by me was or last message was |
ICAO |
|
LSQ |
line squall |
ICAO |
|
LSR |
loose snow on runway |
NWS |
|
LST |
Local Standard Time |
GEN |
|
LT |
turn left after take-off |
ATC |
|
LTAV |
light and variable |
GEN |
|
LTD |
limited |
ICAO |
|
LTF |
local training flight |
ATC |
|
LTFC |
landing traffic |
ATC |
|
LTGCA |
lightning cloud-to-air |
NWS |
|
LTGCC |
lightning cloud-to-cloud |
NWS |
|
LTGCCCG |
lightning cloud-to-cloud, cloud to ground |
NWS |
|
LTGCG |
lightning cloud-to-ground |
NWS |
|
LTGCW |
lightning cloud-to-water |
NWS |
|
LTGIC |
lightning in clouds |
NWS |
|
LTL |
little |
GEN |
|
LTLCG |
little change |
NWS |
|
LTNG |
lightning |
NWS |
|
LTR |
later |
GEN |
|
LTR |
letter |
GEN |
|
LTT |
landline teletypewriter |
ICAO |
|
LTTR |
latter |
GEN |
|
LV |
leaving |
GEN |
|
LV |
light and variable |
ICAO |
|
LVE |
leave or leaving |
ICAO |
|
LVG |
leaving |
ATC |
|
LVL |
level |
ATC |
| LVO | low visibility operations | GEN |
|
LVLOF |
level off |
ATC |
|
LWR |
lower |
GEN |
|
LX |
low index |
NWS |
|
LYR |
layer or layered or layers |
NWS |
,
M
|
Contraction |
Definition |
Usage |
|---|---|---|
|
M |
in RVR indicates visibility less than lowest reportable sensor value (e.g. M600) |
METAR |
|
M |
in temperature field means minus or below zero |
METAR |
|
M |
Mach number |
GEN |
|
M |
maritime (air mass) |
NWS |
|
M |
metres (preceded by figures) |
ICAO |
|
M |
missing (weather reports only) |
NWS |
|
M |
Mountain Standard Time (time groups only) |
NWS |
|
MA |
map analysis |
NWS |
|
MAA |
maximum authorized (IFR) altitude |
GEN |
|
MAC |
Military Airlift Command |
GEN |
|
MACH |
MACH Number (speed ratio to speed of sound) |
ATC |
|
MACKAY |
Mackay Radio and Telegraph Company |
GEN |
|
MACVFR |
make altitude changes VFR |
ATC |
|
MAFAP |
minimum altitude over facility on final approach course |
ATC |
|
MAG |
magnetic |
GEN |
|
MAGSI |
minimum altitude at glide slope intersection inbound |
GEN |
|
MAINT |
maintenance |
ICAO |
|
MAL |
maintain at least (altitude) |
ATC |
|
MALS |
medium intensity approach lighting system |
GEN |
|
MALSF |
medium intensity approach lighting system with sequenced flashers |
GEN |
|
MALSR |
medium intensity approach lighting system with runway alignment indicator lights |
GEN |
|
MAM |
maintenance assumes monitor |
GEN |
|
MAN |
Manitoba |
NWS |
|
MAN |
manual |
GEN |
|
MANAM |
manual amendment |
GEN |
|
MANOP |
manual of operations |
GEN |
|
MAP |
aeronautical maps and charts |
ICAO |
|
MAP |
missed approach point |
GEN |
|
MAPS |
Meteorological Aeronautical Presentation System |
GEN |
|
MAPT |
missed approach point |
ICAO |
|
MAR |
at sea |
ICAO |
|
MARPT |
municipal airport |
GEN |
|
MARSA |
military assumes responsibility for separation of aircraft |
GEN |
|
MAS |
manual A1 simplex |
ICAO |
|
MAS |
military alert system |
GEN |
|
MAX |
maximum |
GEN |
|
MB |
marker beacon |
GEN |
|
MB |
millibars |
GEN |
|
MBST |
microburst |
ICAO |
|
MCA |
minimum crossing altitude |
ICAO |
|
MCAS |
Marine Corps Air Station |
GEN |
|
MCAS(H) |
Marine Corps Air Station (Helicopter) |
GEN |
|
MCK |
maintenance check |
GEN |
|
MCS |
Master Control Station |
ATC |
|
MCW |
modulated continuous wave |
ICAO |
|
MCZNE |
minimum when control zone effective |
GEN |
|
MDA |
minimum descent altitude |
ICAO |
|
MDF |
medium frequency direction finding station |
ICAO |
|
MDFR |
make descent from |
ATC |
|
MDFY |
modify |
GEN |
|
MDH |
minimum descent height |
ICAO |
|
MDT |
moderate |
GEN |
|
MDZ |
modernize |
GEN |
|
MDZN |
modernization |
GEN |
|
MEA |
minimum en route altitude |
ICAO |
|
MECH |
mechanic |
GEN |
|
MED |
medical |
GEN |
|
MED |
medium |
GEN |
|
MEDEVAC |
medical emergency evacuation |
ICAO |
|
MEGG |
merging |
NWS |
|
MEHT |
minimum eye height over threshold |
ICAO |
|
MEML |
memorial |
GEN |
|
MET |
meteorological |
GEN |
|
METAR |
aviation routine weather report |
ICAO |
|
METOF |
meteorological officer |
GEN |
|
METRO |
metropolitan |
GEN |
|
MEX |
Mexico |
NWS |
|
MF |
medium frequency |
GEN |
|
MFL |
maintain flight level |
ATC |
|
MFOB |
minimum fuel on board |
ATC |
|
MFPOF |
master flight plan on file |
ATC |
|
MFS |
military flight service |
GEN |
|
MFV |
forward visibility more than (miles) |
ATC |
|
MFXT |
meter fix time |
ATC |
|
MGAT |
make good a track of (degrees) |
ATC |
|
MGMT |
make good a magnetic track of (degrees) |
ATC |
|
MGMT |
management |
GEN |
|
MGR |
manager |
GEN |
|
MHA |
minimum holding altitude |
GEN |
|
MHDF |
medium and high frequency direction-finding station (same location) |
ICAO |
|
MHDG |
magnetic heading |
GEN |
|
MHFR |
military height finder radar |
GEN |
|
MHKVLY |
Mohawk Valley |
NWS |
|
MHVDF |
medium high and very high frequency direction-finding station (same location) |
ICAO |
|
MHZ |
megahertz |
ICAO |
|
MI |
manufacturing inspector |
GEN |
|
MI |
mile |
GEN |
|
MI |
shallow |
METAR |
|
MID |
middle |
GEN |
|
MID |
mid-point (related to RVR) |
ICAO |
|
MID/ASIA |
ICAO Middle East/Asia Region |
ATC |
|
MIDIZ |
Mid-Canada Identification Zone |
GEN |
|
MIDN |
midnight |
NWS |
|
MIDPT |
midpoint |
GEN |
|
MIFG |
patches of shallow fog not deeper than two meters |
NWS |
|
MIFG |
shallow fog |
METAR |
|
MIJI |
meaconing, intrusion, jamming, interference |
ATC |
|
MIL |
military |
ICAO |
|
MIMNO |
mimeographic notice |
GEN |
|
MIN |
minute |
ICAO |
|
MINIT |
minutes in trail |
ATC |
|
MIREQ |
minimum requirements specified |
GEN |
|
MIRL |
medium intensity runway edge lights |
GEN |
|
MIS |
Missing (transmission identification) |
ICAO |
|
MISC |
miscellaneous |
GEN |
|
MISG |
missing |
GEN |
|
MISL |
missile |
GEN |
|
MIT |
miles in trail |
ATC |
|
MITO |
minimum interval take-off |
ATC |
|
MKCT |
make check turn |
ATC |
|
MKD |
marked |
GEN |
|
MKR |
marker |
GEN |
|
MKR |
marker radio beacon |
ICAO |
|
MLS |
microwave landing system |
GEN |
|
MLTLVL |
melting level |
NWS |
|
MM |
middle marker |
ICAO |
|
MM |
millimeter |
GEN |
|
MMACH |
maintain Mach |
ATC |
|
MMO |
main meteorological office |
NWS |
|
MNLD |
mainland |
NWS |
|
MNLY |
mainly |
GEN |
|
MNM |
minimum |
ICAO |
|
MNPS |
minimum navigation performance specification |
ATC |
|
MNPSA |
minimum navigation performance specification airspace |
ATC |
|
MNT |
monitor, monitored, or monitoring |
ICAO |
|
MNTN |
maintain |
ICAO |
|
MNVR |
maneuver |
GEN |
|
MOA |
memorandum of agreement |
GEN |
|
MOA |
military operations area |
ICAO |
|
MOC |
minimum obstacle clearance (required) |
ICAO |
|
MOCA |
minimum obstruction clearance altitude |
ICAO |
|
MOD |
moderate |
GEN |
|
MOD |
modulate or modulation or modulator |
GEN |
|
MOGR |
moderate or greater |
NWS |
|
MON |
above mountains |
ICAO |
|
MON |
Monday |
ICAO |
|
MONOK |
monitor resumed normal operation |
GEN |
|
MONOS |
monitor out of service |
GEN |
|
MONTR |
monitor |
NWS |
|
MOPS |
Minimum operational performance standards |
ICAO |
|
MOPTAR |
multi-object phase tracking and ranging |
GEN |
|
MOREPS |
monitor station reports |
GEN |
|
MOT |
Ministry of Transport (Canada) |
GEN |
|
MOTNE |
Meteorological Operational Telecommunications Network Europe |
ICAO |
|
MOV |
move, or moving, or movement |
ICAO |
|
MPH |
miles per hour |
GEN |
|
MPP |
Merit Promotion Program |
GEN |
|
MPS |
meters per second |
ICAO |
|
MPVA |
maintain a position VFR and advise |
ATC |
|
MRA |
minimum reception altitude |
GEN |
|
MRG |
medium range |
GEN |
|
MRGL |
marginal |
NWS |
MRKG |
marking |
GEN |
|
MRM |
maintenance returns monitor |
GEN |
|
MRNG |
morning |
NWS |
|
MRP |
ATS/MET reporting point |
ICAO |
|
MRR |
mechanical reliability report |
GEN |
|
MRTM |
maritime |
NWS |
|
MRU |
Military Radar Unit |
GEN |
|
MS |
minus |
NWS |
|
MSA |
minimum safe/sector altitude |
GEN |
|
MSAW |
minimum safe altitude warning |
GEN |
|
MSG |
message |
ICAO |
|
MSGCTR |
message center |
GEN |
|
MSL |
mean sea level |
ICAO |
|
MSR |
Message (transmission identification) has been misrouted |
ICAO |
|
MSSR |
Monopulse secondary surveillance radar |
ICAO |
|
MSTLY |
mostly |
NWS |
|
MSTR |
moisture |
NWS |
|
MT |
mountain |
ICAO |
|
MTCA |
minimum terrain clearance altitude |
GEN |
|
MTI |
moving target indicator |
ATC |
|
MTN |
mountain |
NWS |
|
MTR |
military training route |
GEN |
|
MTRL |
material |
GEN |
|
MTRY |
momentary |
GEN |
|
MTU |
metric units |
ICAO |
|
MTW |
mountain wave |
ICAO |
|
MU |
designate a friction value representing runway surface conditions (Greek letter) |
GEN |
|
MUA |
maximum usable altitude |
GEN |
|
MUF |
maximum usable frequency |
GEN |
|
MULT |
multiple |
GEN |
|
MUNI |
municipal |
GEN |
|
MV |
millivolt |
GEN |
|
MVA |
minimum vector altitude |
GEN |
|
MVDF |
medium and very high frequency direction-finding station (same location) |
ICAO |
|
MVFR |
maintain VFR |
ATC |
|
MVFR |
marginal VFR |
NWS |
|
MVSP |
maintain visual separation |
ATC |
|
MWO |
Meteorological Watch Office |
ICAO |
|
MWRC |
maintain well to right of course |
ATC |
|
MWTCS |
modernized weather teletypewriter communications system |
GEN |
|
MXD |
mixed |
NWS |
,
N
|
Contraction |
Definition |
Usage |
|---|---|---|
|
N |
north or northern latitude |
ICAO |
|
N/A |
not applicable |
GEN |
|
NA |
not authorized |
GEN |
|
NAAS |
Naval Auxiliary Air Station |
GEN |
|
NAATS |
National Association of Air Traffic Control Specialists |
GEN |
|
NAB |
not above |
GEN |
|
NACOS |
national communications schedule |
GEN |
|
NADIN |
National Airspace Data Interchange Network |
GEN |
|
NAF |
Naval Air Facility |
GEN |
|
NAFEC |
National Aviation Facilities Experimental Center |
GEN |
|
NANAC |
National Aircraft Noise Abatement Council |
GEN |
|
NAP |
not at present |
GEN |
|
NAPRS |
National Airspace Performance Reporting System |
ATC |
|
NAR |
North American Route |
GEN |
|
NAR |
not according to routine |
GEN |
|
NAS |
National Airspace System |
GEN |
|
NAS |
Naval Air Station |
GEN |
|
NASA |
National Aeronautics and Space Administration |
GEN |
|
NASC |
National AIS system centre |
ICAO |
|
NASEO |
National Airways System Engineering office |
GEN |
|
NASP |
National Airport System Plan |
GEN |
|
NAT |
North Atlantic |
GEN |
|
NAT |
not ARTS tracked |
ATC |
|
NATCA |
National Air Traffic Controllers Association |
ATC |
|
NATCAS |
Navigation, ATC, and Collision Avoidance System |
GEN |
|
NATCC |
National Air Transport Coordinating Committee |
GEN |
|
NATCOM |
National Communications Center |
GEN |
|
NATL |
national |
GEN |
|
NATR |
no additional traffic reported |
ATC |
|
NATS |
noise abatement test system |
GEN |
|
NAV |
navigation |
ICAO |
|
NAVAID |
navigational aid |
GEN |
|
NAVLO |
Navy Liaison Officer |
GEN |
|
NAVREP |
Navy Representative to the FAA |
GEN |
|
NB |
New Brunswick |
NWS |
|
NB |
northbound |
ICAO |
|
NBCAP |
national beacon code allocation plan |
GEN |
|
NBFR |
not before |
ICAO |
|
NBND |
northbound |
GEN |
|
NBRHD |
neighborhood |
GEN |
|
NC |
no change |
GEN |
|
NCDC |
National Climatic Data Center |
GEN |
|
NCE |
no change in estimates |
ATC |
|
NCS |
National Communications System |
GEN |
|
NCWX |
no change in weather |
NWS |
|
NDB |
nondirectional radio beacon |
ICAO |
|
NDB/DME |
NDB and DME (collocated) |
GEN |
|
NDBLO |
not to descend below |
ATC |
|
NE |
north-east |
ICAO |
|
NEB |
north-eastbound |
ICAO |
|
NEC |
necessary |
GEN |
|
NEF |
no further clearance required |
ATC |
|
NEG |
negative |
GEN |
|
NELY |
northeasterly (weather reports only) |
NWS |
|
NERN |
northeastern |
NWS |
|
NESS |
national environmental satellite service |
GEN |
|
NETR |
no essential traffic reported |
ATC |
|
NEW ENG |
New England |
NWS |
|
NFDD |
National Flight Data Digest |
GEN |
|
NFLD |
Newfoundland |
NWS |
|
NFQ |
night frequency |
GEN |
|
NFT |
no filing time |
GEN |
|
NFU |
not for us |
GEN |
|
NG |
National Guard |
GEN |
|
NGT |
night |
ICAO |
|
NHD |
not heard |
ATC |
|
NICS |
National Airspace System Interfacility Communications System |
GEN |
|
NIL |
none |
GEN |
|
NIL |
unable to transmit |
GEN |
|
NIS |
not in system |
GEN |
|
NL |
no layers |
NWS |
|
NLT |
not later than |
GEN |
|
NM |
nautical mile |
ICAO |
|
NMBR |
number |
NWS |
|
NMC |
National Meteorological Center |
GEN |
|
NML |
normal |
GEN |
|
NMN |
no middle name |
GEN |
|
NMR |
nautical mile radius |
GEN |
|
NMRS |
numerous |
GEN |
|
NNE |
north-north east |
ICAO |