A

/

and

A/C

approach control

AAM

Advanced Air Mobility

AAS

airport advisory service

ICAO:

AAP - approach control;
AC - altocumulus

ACFT

aircraft

ACR

air carrier

ADF

automatic direction finder

AER

approach end runway

AFIS

Automatic Flight Information Service

AFT

after

AGL

above ground level

AHRS

Attitude Heading Reference System

AIM

Aeronautical Information Manual

AIS

Aeronautical Information Services

ALS

approach light system

ALSF-1

standard 2400' high-intensity approach lighting system with sequenced flashers (Category I configuration)

ALSF-2

standard 2400' high-intensity approach lighting system with sequenced flashers (Category II configuration)

ALSTG

altimeter setting

ALT

altitude

ALTM

altimeter

ALTN

alternate

AMDT

amendment

ICAO:

AMD - amendment

APCH

approach

APCHG

approaching

APRX

approximate

APV

approve or approved or approval

ARAC

Army Radar Approach Control facility (US Army)

ARPT

airport

ATO

Air Traffic Organization

ICAO:

AD - aerodrome

ARR

arrive or arrival

ARSR

air route surveillance radar

ARTCC

air route traffic control center

ASDE

airport surface detection equipment

ASPH

asphalt

ASSC

Airport Surface Surveillance Capability

ATCT

air traffic control tower

ATD

along-track distance

ASR

airport surveillance radar

ATIS

automatic terminal information service

AVBL

available

AWY

airway

B

BC

back course

BCN

beacon

BCST

broadcast

BLDG

building

BRG

bearing

BTN

between

BVLOS

Beyond Visual Line of Sight

BYD

beyond

C

CAT

category

ICAO:

CAT - clear air turbulence

CBO

Community-Based Organization

CFR

Code of Federal Regulations

CFR

crash fire rescue

CLNC

clearance

ICAO:

CLR - clear/cleared to/clearance

CLSD

close or closed or closing

CMSND

commissioned

CNTR

center

CNTRLN

centerline

ICAO:

CL - centerline

COA

Certificate of Waiver or Authorization

COMLO

compass locator

CONST

construction

CPTY

capacity

CRS

course

CTC

contact

ICAO:

CTR - control zone

D

ICAO:

D - danger area

ICAO:

D - downward (tendency in RVR during previous 10 minutes)

DALGT

daylight

DCMSND

decommissioned

DDT

runway weight bearing capacity for aircraft with double dual-tandem type landing gear

DEGS

degrees

ICAO:

C - degrees Celsius (Centigrade)
F - degrees Fahrenheit

DEP

depart; departure

ICAO:

DEP - depart/departure/departure message

DF

direction finder

ICAO:

DF - I am connecting you to the station you request

DH

decision height

DME

UHF standard (TACAN compatible distance measuring equipment)

ICAO:

DME - distance meaning equipment

DSPLCD

displaced

DSTC

distance

ICAO:

DIST - distance

DT

runway weight bearing capacity for aircraft with dual-tandem type landing gear

DURG

during

ICAO:

DRG - during

DVFR

defense visual flight rule

DW

runway weight bearing capacity for aircraft with dual-wheel type landing gear

E

E

east

ICAO:

E - east/east longitude

EQUIP

equipment

ICAO:

EQPT - equipment

ETA

estimated time of arrival

ETE

estimated time en route

EXCP

except

ICAO:

EXC-except

EXTD

extend or extended

F

FAF

final approach fix

FAR

Federal Aviation Regulation

FDC

flight data center

Fl/P

flight information (permanent)

Fl/T

flight information (temporary)

FL

flight level

FM

fan marker

FM

from

ICAO:

FM - from; FM - from (followed by time weather change is forecast to begin)

FREQ

frequency

FRIA

FAA-Recognized Identification Area

FRQ

frequent

FSS

Flight Service Station

FT

feet

G

GOVT

government

GP

glide path

ICAO:

GP - glide path

GS

glide slope

ICAO:

GS - ground speed; GS - small hail and/or snow pellets

GWT

gross weight

H

HAA

height above airport

HAT

height above touchdown

HAZMAT

Hazardous Material

ICAO:

HGT - height/height above

HIRL

High intensity runway lights

HOL

holiday

HWY

highway

I

IAF

initial approach fix

IAP

instrument approach procedure

ICAO:

INA - initial approach

IDENT

identification

ICAO:

ID - identifier/identification/identify

IF

intermediate fix

ICAO:

IF - intermediate approach fix

IFR

instrument flight rules

IFSS

international flight service station

ILS

instrument landing system

INFO

information

INOP

inoperative

INS

Inertial Navigation System

INT

intersection

INTL

international

INTST

intensity

IRU

Inertial Reference Unit

J

J-bar

jet runway barrier

K

KHZ

kilohertz

L

L

left (used only to designate rwys; e.g., rwy 12L)

ICAO:

L - left/runway identification/locator

LAANC

Low Altitude Authorization and Notification Capability

LAT

latitude

LB

pounds (weight)

LCTD

located

LDA

localizer type directional aid

ICAO:

LDA - landing distance available LLZ - localizer

LGTD

lighted

LMM

compass locator at ILS middle marker

LNDG

landing

ICAO:

LDG - landing

LOC

localizer

ICAO:

LOC-localizer or locally or location or located

LOM

compass locator at ILS outer marker

LONG

longitude

LRCO

limited remote communications outlet

M

MAA

maximum authorized altitude

MAG

magnetic

MAINT

maintain, maintenance

ICAO:

MNTN - maintain;
MAINT - maintenance

MALS

medium intensity approach light system

MALSR

medium intensity approach light system with runway alignment indicator lights

MAP

missed approach point

ICAO:

MAP - aeronautical maps and charts

MAX

maximum

MCA

minimum crossing altitude

MDA

minimum descent altitude

MEA

minimum en route IFR altitude

MGOW

Maximum Gross Operating Weight

MHZ

megahertz

MIN

minimum or minute

MIRL

medium intensity runway edge lights

MM

middle marker ILS

MOCA

minimum obstruction clearance altitude

MRA

minimum reception altitude

MSA

minimum safe altitude

MSL

mean sea level

MUNI

municipal

N

N

north

NA

not authorized

NATL

national

NAVAID

navigational aid

NDB

nondirectional radio beacon

NM

nautical mile(s)

NOPT

no procedure turn required

NR

number

O

OBSTN

obstruction

OCA

Oceanic Control Area

ODALS

omnidirectional approach lighting system

OM

outer marker ILS

OOP

Operations Over People

OPER

operate

OPN

operation

ICAO:

OPR - operator/operate/operative/ operating/operational

ORIG

original

OTS

out of service

OVRN

overrun

P

PAO

Public Aircraft Operation

PAR

precision approach radar

PAT

pattern

PBCS

Performance-Based Communication and Surveillance

PCN

pavement classification number

PERMLY

permanently

PIC

Pilot-in-Command

POB

persons on board

PPR

prior permission required

PROC

procedure

Q

QUAD

quadrant

R

R

right (used only to designate rwys; e.g.,  rwy 19R)

ICAO:

R - received (acknowledgement of receipt)/red/restricted area (followed by identification)/right (runway identification)

RADAR

radio detection and ranging

RAPCON

Radar Approach Control facility (USAF, USN and USMC)

RATCF

Radar Air Traffic Control Facility (USN and USMC)

RC

Radio-Controlled

RCAG

remote communications air/ground

RCLS

runway centerline lights system

ICAO:

RCL - runway centerline

RCO

remote communications outlet

RCV

receive

RCVG

receiving

REIL

runway end identifier lights

REQ

request

RID

Remote Identification

RNAV

area navigation

RPIC

Remote Pilot-in-Command

RRP

runway reference point

REL

runway entrance lights

RLLS

Runway Lead-in Light System

RSTRD

restricted

RTS

returned to service

RVR

runway visual range

RVRM

runway visual range midpoint

RVRR

runway visual range rollout

RVRT

runway visual range touchdown

RWSL

runway status light

RWY

runway

ICAO:

RWY-runway

S

S

runway weight bearing capacity for aircraft with single-wheel type landing gear

S

south

ICAO:

S - south/south latitude

SAA

Sense and Avoid

SDF

simplified directional facility

SEC

second

SFC

surface

SFL

sequenced flashing lights

SGI

Special Government Interest

SI

straight-in approach

ICAO:

STA - straight-in approach

SM

statute mile(s)

SR

sunrise

SS

sunset

ICAO:

SS - sandstorm

SSALF

simplified short approach lighting system with sequenced flashers

SSALR

simplified short approach lighting system with runway alignment indicator lights

SSALS

simplified short approach lighting system

STOL

short take-off and landing runway

ICAO:

STOL - short takeoff and landing

sUAS

Small UAS

SVC

service

ICAO:

SVC - service message

T

T

true (after a bearing)

ICAO:

T - temperature

TAC

terminal area chart

TACAN

UHF navigational facility - omnidirectioal course and distance information

ICAO:

TACAN - VHF tactical navigational aid

TAS

true air speed

TCH

threshold crossing height

ICAO:

TEMPO - Temporary/temporarily

TFC

traffic

THL

takeoff hold lights

THR

threshold

THRU

through

ICAO:

THRU - through/I am connecting you to another switchboard

TKOF

take-off

TEMPRLY

temporarily

ICAO:

TMA - TERMINAL CONTROL AREA

TMPRY

temporary/temporarily

TPA

traffic pattern altitude

TRACON

terminal radar approach control

TRML

terminal

TRSA

terminal radar service area

TRUST

The Recreational UAS Safety Test

TSNT

transient

TWR

tower

TWY

taxiway

U

ICAO:

U/S - unserviceable

UAM

Urban Air Mobility

UAS

Unmanned Aircraft System

UASFM

UAS Facility Map

UAVBL

unavailable

UHF

ultra high frequency

UNLGTD

unlighted

UNMON

unmonitored

UNSKED

unscheduled

UNUSBL

unusable

UTM

UAS Traffic Management

V

VASI

visual approach slope indicator

VCNTY

vicinity

VDP

visual descent point

VFR

visual flight rules

VHF

very high frequency

VOR

VHF omni-directional radio range

VLOS

Visual Line of Sight

VO

Visual Observer

VORTAC

Combined VOR and TACAN system (collocated)

VOT

a VOR Receiver testing facility

VSBY

visibility

ICAO:

VIS - visibility

W

W

west

WEA

weather

ICAO:

WX - weather

WKDAY

weekday

WKEND

weekend

WPT

waypoint

WS

Weather Service

WT

weight

Z

Z

Coordinated Universal Time

ICAO:

UTC - Coordinated Universal Time