Aeronautical Terms

AAF

Army Air Field

AAS

Airport Advisory Service

AC

Advisory Circular

ADF

Automatic Direction Finder

ADIZ

Air Defense Identification Zone

Automatic Dependent Surveillance

ADS-B

Automatic Dependent Surveillance-Broadcast

Advsry

Advisory

AFB

Air Force Base

AFIS

Automatic Flight Information Service

AFS

Air Force Station

AFSS

Automated Flight Service Station

AGL

Above Ground Level

AIM

Aeronautical Information Manual

AIRAC

Aeronautical Information Regulation And Control

AK

Alaska

AL

Approach and Landing

ANG

Air National Guard

APP

Approach

APP CON

Approach Control

APP CRS

Approach Course

Apt

Airport

APV

Approaches with Vertical Guidance

ARP

Airport Reference Point

ARTCC

Air Route Traffic Control Center

ASDA

Accelerate-Stop Distance Available

ASDE-X

Airport Surface Detection Equipment-Model X

ASOS

Automated Surface Observing Station

ASR

Airport Surveillance Radar

ATC

Air Traffic Control

ATIS

Automatic Terminal Information Service

ATS

Air Traffic Service

AUNICOM

Automated Aeronautical Advisory Station

AWOS

Automated Weather Observing Station

Baro-VNAV

Barometric Vertical Navigation

BS

Broadcast Station

CAT

CFA

Controlled Firing Areas

CFR

Code of Federal Regulations

CL

Runway Centerline Lights

CLNC DEL

Clearance Delivery

CNF

Computer Navigation Fix

COP

Changeover Point

CPDLC

Controller Pilot Data Link Communication

CRS

Course

CT

Control Tower

CTAF

Common Traffic Advisory Frequency

CVFP

Charted Visual Flight Procedure

D-ATIS

Digital Automatic Terminal Information Service

DA

Decision Altitude

DH

Decision Height

DME

Distance Measuring Equipment

DoD

Department of Defense

DOF

Digital Obstacle File

DP

Departure Procedure

DT

Daylight Savings Time

DVA

Diverse Vector Area

E

East

EFAS

Enroute Flight Advisory Service

EFB

Electronic Flight Bag

Elev

Elevation

EMAS

Engineered Materials Arresting System

FAA

Federal Aviation Administration

FAF

Final Approach Fix

FAP

Final Approach Point

FAR

Federal Aviation Regulation

FBO

Fixed-Based Operator

FIR

Flight Information Region

FL

Flight Level

FLIP

Flight Information Publication

FMS

Flight Management System

FREQ

Frequency

FRZ

Flight Restricted Zone

FSDO

Flight Standards District Office

FSS

Flight Service Station

GBAS

Ground-Based Augmentation System

GCO

Ground Communications Outlet

GLS

GBAS Landing System

GND

Ground

GND CON

Ground Control

GNSS

Global Navigation Satellite System

GP

Glide Path

GPS

Global Positioning System

GS

Glide Slope

HAA

Height Above Airport

HAR

High Altitude Redesign

HAT

Height Above Touchdown

HCH

Heliport Crossing Height

HF

High Frequency

HIRL

High Intensity Runway Lights

HS

Hot Spot

IAC

Interagency Air Committee

IACC

Interagency Air Cartographic Committee

IAF

Initial Approach Fix

IAP

Instrument Approach Procedure

ICAO

International Civil Aviation Authority

IDT

Identifier

IF

Intermediate Fix

IFR

Instrument Flight Rules

ILS

Instrument Landing System

IMC

Instrument Meteorological Conditions

INS

Inertial Navigation System

IR

Instrument Route (Military)

IRU

Inertial Reference Unit

JO

Joint Order

KIAS

Knots

LAA

Local Airport Advisory

LAAS

Local Area Augmentation System

LAHSO

Land and Hold Short

LDA

Landing Distance Available

Ldg

Landing

LF

Low Frequency

LIRL

Low Intensity Runway Lights

LNAV

Lateral Navigation

LOC

Localizer

LOM

Locator Outer Marker

LPV

Localizer Performance with Vertical Guidance

LRRS

Long Range Radar Station

LTP

Landing Threshold Point

MAA

Maximum Authorized Altitude

MAP

Missed Approach Point

MCA

Minimum Crossing Altitude

MCAS

Marine Corps Air Station

MDA

Minimum Descent Altitude

MDH

Minimum Descent Height

MEA

Minimum Enroute Altitude

MEF

Maximum Elevation Figure

MF

Medium Frequency

MIA

Minimum IFR Altitude

MIRL

Medium Intensity Runway Lights

MOA

Military Operations Areas

MOCA

Minimum Obstruction Clearance Altitude

MON

Minimum Operational Network

MORA

Minimum Off-Route Altitude

MRA

Minimum Reception Altitude

MSA

Minimum Safe Altitude

MSL

Mean Sea Level

MTA

Minimum Turning Altitude

MTR

Military Training Route

MVA

Minimum Vector Altitude

N

North

N/A

Not Applicable

NA

Not Authorized

NAAS

Naval Auxiliary Air Station

NAS

Naval Air Station

NAV

Naval Air Facility

NAVAID

Navigational Aid (Ground based)

NDB

Non-Directional Radiobeacon

NextGen

Next Generation Air Transportation System

NFDC

National Flight Data Center

NFPO

National Flight Procedures Office

NM

Nautical Mile

NO A/G

No Air-to-Ground Communication

NOAA

National Oceanic and Atmospheric Administration

NoPT

No Procedure Turn

NOTAM

Notice to Airmen

NPA

Non-Precision Approach

NWS

National Weather Service

OAT

Outside Air Temperature

OBS

Omni Bearing Selector

OCA

Ocean Control Area

OCS

Obstacle Clearance Surface

ODP

Obstacle Departure Procedure

OM

Outer Marker

OROCA

Off Route Obstruction Clearance Altitude

PA

Precision Approach

PAR

Precision Approach Radar

PBN

Performance-Based Navigation

PRM

Precision Runway Monitor

PT

Procedure Turn

PTP

Point-to-Point

Pvt

Private

R

Radial

RCO

Remote Communications Outlet

RF

Radius-to-Fix

RNAV

Area Navigation

RNP

Required Navigation Performance

RNP AR

Required Navigation Performance Authorization Required

ROC

Required Obstacle Clearance

RP

Right Pattern

RVR

Runway Visual Range

RVSM

Reduced Vertical Separation Minimum

Rwy

Runway

S

South

SAAAR

Special Aircraft and Aircrew Authorization Required

SAAR

Special Aircraft and Aircrew Requirements

SATNAV

Satellite Navigation

SDF

Simplified Directional Facility

SER

Start End of Runway

SFAR

Special Flight Rules Area

SFC

Surface

SFRA

Special Flight Rules Area

SIAPs

Standard Instrument Approach Procedures

SID

Standard Instrument Departure

SM

Statute Mile

SMAR

Special Military Activity Routes

SMGCS

Surface Movement Guidance and Control System

SOIA

Simultaneous Offset Instrument Approaches

SSV

Standard Service Volume

STAR

Standard Terminal Arrival Procedure

SUA

Special Use Airspace

SVFR

Special Visual Flight Rules

T

Transmit

TA

Travel Advisory

TAA

Terminal Arrival Area

TAC

Terminal Area Chart

TACAN

Tactical Air Navigation

TAS

True Air Speed

TCH

Threshold Crossing Height

TDZ

Touchdown Zone

TDZ/CL

Touchdown Zone/Centerline Lights

TDZE

Touchdown Zone Elevation

TDZL

Touchdown Zone Lights

TERPS

U.S. Standard for Terminal Instrument Procedures

TFR

Temporary Flight Restriction

TOD

Top of Descent

TODA

Takeoff Distance Available

TOGA

Takeoff/Go Around

TORA

Takeoff Runway Available

TPP

Terminal Procedures Publication

TRSA

Terminal Radar Service Area

TWR

Tower

U.S.

United States

UC

Under Construction

UHF

Ultra High Frequency

UIR

Upper Information Region

UNICOM

Universal Communications

USA

United States Army

USAF

United States Air Force

USCG

United State Coast Guard

UTA

Upper Control Area

VCOA

Visual Climb Over Airport / Airfield

VDA

Vertical Descent Angle

VDP

Visual Decent Point

VFR

Visual Flight Rules

VGSI

Visual Glide Slope Indicator

VHF

Very High Frequency

VMC

Visual Meteorological Conditions

VNAV

Vertical Navigation

VOR

VHF Omnidirectional Radio Range

VORTAC

VHF Omnidirectional Radio Range/Tactical Air Navigation

VPA

Vertical Path Angle

VR

Visual Route (Military)

W

Warning Area (Special Use Airspace)

WAAS

Wide-Area Augmentation System

WAC

World Aeronautical Chart

WP

Waypoint