Abbreviations

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A

A/A — Air to Air

AAF — Army Air Field

AAIM — Aircraft Autonomous Integrity Monitoring

AAIS — Automated Aerodrome Information Service

AAL — Above Aerodrome Level

AAS — Airport Advisory Service

AAWU — Alaskan Aviation Weather Unit

AB — Air Base

ABM — Abeam

ABN — Aerodrome Beacon

AC — Air Carrier

AC — Advisory Circular

ACA — Arctic Control Area

ACA — Approach Control Area

ACAS — Airborne Collision Avoidance System

ACAR — Aircraft Communications Addressing and Reporting System

ACARS — Airborne Communications Addressing and Reporting System

ACC — Area Control Center

ACFT — Aircraft

ACN — Aircraft Classification Number

AD — Aerodrome

ADA — Advisory Area

ADCUS — Advise Customs

ADDS — Aviation Digital Data Service

ADF — Automatic Direction Finding

ADIZ — Air Defense Identification Zone

ADR — Advisory Route

ADS — Automatic Dependent Surveillance

ADV — Advisory Area

AEIS — Aeronautical Enroute Information Service

AER — Approach End of Runway

AERADIO — Air Radio AERO Aerodrome

AF Aux — Air Force Auxiliary Field

AFB — Air Force Base

AFCS — Automatic Flight Control System

A/FD — Airport / Facility Directory

AFIS — Aerodrome Flight Information Service

AFM — Aircraft Flight Manual

AFN — American Forces Network

AFRS — Armed Forces Radio Stations

AFRU — Aerodrome Frequency Response Unit

AFS — Air Force Station

AFSS — Automated Flight Service Station

A/G — Air-to-Ground

AGL — Above Ground Level

AGNIS — Azimuth Guidance Nose-in-Stand

AH — Alert Height

AHP — Army Heliport

AHRS — Attitude Heading Reference System

AIM — Aeronautical Information Manual

AIRAC — Aeronautical Information Regulation and Control

AIREP — Air-Report

AIRMET — Airmen's Meteorological Information

AIS — Aeronautical Information Services

ALA — Aircraft Landing Area

ALD — Available Landing Distance

ALF — Auxiliary Landing Field

ALS — Approach Light System

ALT — Altitude

ALTN — Alternate

AMA — Area Minimum Altitude

AMSL — Above Mean Sea Level

ANGB — Air National Guard Base

ANP — Actual Navigation Performance

AOCC — Airlines Operations Control Center

AOE — Airport/Aerodrome of Entry

AOR — Area of Responsibility

AP — Autopilot System

APAPI — Abbreviated Precision Approach Path Indicator

APC — Area Positive Control

APCH — Approach

APP — Approach Control

APT — Airport

APV — Approach Procedures with Vertical Guidance

ARENA — Areas Noted for Attention

ARFF IC — Aircraft Rescue and Fire Fighting Incident Commander

ARB — Air Reserve Base

ARINC — Aeronautical Radio Incorporated

ARO — Aerodrome Reporting Officer

ARP — Airport Reference Point

ARR — Arrival

ARSA — Airport Radar Service Area

ARSR — Air Route Surveillance Radar

ARTCC — Air Route Traffic Control Center

ARTS — Automated Radar Terminal System

ASDA — Accelerate Stop Distance Available

ASOS — Automated Surface Observing System

ASR — Airport Surveillance Radar

ATA — Actual Time of Arrival

ATC — Air Traffic Control

ATCAA — Air Traffic Control Assigned Airspace

ATCC — Air Traffic Control Center

ATCRBS — Air Traffic Control Radar Beacon System

ATCT — Air Traffic Control Tower

ATD — Actual Time of Departure

ATF — Aerodrome Traffic Frequency

ATFM — Air Traffic Flow Management

ATIS — Automatic Terminal Information Service

ATS — Air Traffic Service

ATT — Attitude Retention System

ATZ — Aerodrome Traffic Zone

AUTH — Authorized

AUW — All-up Weight

AUX — Auxiliary

AVBL — Available

AWC — Aviation Weather Center

AWIB — Aerodrome Weather Information Broadcast

AWIS — Aerodrome Weather Information Service

AWOS — Automated Weather Observing System

AWSS — Aviation Weather Sensor System

AWW — Severe Weather Forecast Alert

AWY — Airway

AZM — Azimuth

B

Baro — VNAV Barometric Vertical Navigation

BBS — Bulletin Board System

BC — Back Course

BCM — Back Course Marker

BCN — Beacon

BCOB — Broken Clouds or Better

BCST — Broadcast

BDRY — Boundary

BLDG — Building

BM — Back Marker

BRG — Bearing

B-RNAV — Basic RNAV

BS — Broadcast Station (Commercial)

C

C — ATC IFR Flight Plan Clearance Delivery Frequency

C/A — Course Acquisition

CADIZ — Canadian Air Defense Identification Zone

CAE — Control Area Extension

CA/GRS — Certified Air/Ground Radio Service

CANPA — Constant Angle Non-Precision Approach

CARS — Community Aerodrome Radio Station

CARTS — Common Automated Radar Terminal System

CAT — Category

CAT — Clear Air Turbulence

CBA — Cross Border Area

CD — Controller Display

CDFA — Continuous Descent Final Approach

CDI — Course Deviation Indicator

CDR — Conditional Route

CDT — Central Daylight Time

CEIL — Ceiling

CERAP — Combined Center/Radar Approach Control

CFA — Controlled Firing Area

CFIT — Controlled Flight Into Terrain

CFR — Code of Federal Regulations

CGAS — Coast Guard Air Station

CGL — Circling Guidance Lights

CH — Channel

CH — Critical Height

CL — Centerline Lights

CMNPS — Canadian Minimum Navigation Performance Specification

CNF — Computer Navigation Fix

CO — County

COMLO — Compass Locator

COMMS — Communications

CONT — Continuous

CONTD — Continued

COORDS — Coordinates

COP — Change Over Point

CORR — Corridor

CP — Command Post

CPDLC — Controller Pilot Data Link Communications

Cpt — Clearance (Pre-Taxi Procedure)

CRP — Compulsory Reporting Point

CRS — Course

CST — Central Standard Time

CTA — Control Area

CTAF — Common Traffic Advisory Frequency

CTL — Control

CTOT — Calculated Take-off Time

CTR — Control Zone

CVFP — Charted Visual Flight Procedure

CVFR — Controlled VFR

CVRS — Computerized Voice Reservation System

CWA — Center Weather Advisory

CWSU — Center Weather Service Unit

D

D — Day

DA — Decision Altitude

DA (H) — Decision Altitude (Height)

D-ATIS — Digital ATIS

DCL — Data Link Departure Clearance Service

DCT — Direct

DECMSND — Decommissioned

DEG — Degree

DEP — Departure Control

DEPARTURE.gif — Departure Procedure

DER — Departure End of Runway

DEWIZ — Distance Early Warning Identification Zone

DF — Direction Finder

DH — Decision Height

DISPL THRESH — Displaced Threshold

DIST — Distance

DME — Distance-Measuring Equipment

DME/N — Standard DME

DME/P — Precision DME

DOD — Department of Defense

DOM — Domestic

DP — Obstacle Departure Procedure

DP — Instrument Departure Procedure

DUATS — Direct Access User Terminal System

DVFR — Defense Visual Flight Rules

DVRSN — Diversion

E

E — East or Eastern

EAT — Expected Approach Time

ECOMS — Jeppesen Explanation of Common Minimum Specifications

EDCT — Expect Departure Clearance Time

EDT — Eastern Daylight Time

EET — Estimated Elapsed Time

EFAS — Enroute Flight Advisory Service

EFF — Effective

ELEV — Elevation

ELT — Emergency Locator Transmitter

EMAS — Engineered Materials Arresting System

EMERG — Emergency

ENG — Engine

EOBT — Estimated Off Block Time

EPE — Estimate of Position Error

EST — Eastern Standard Time

EST — Estimated

ETA — Estimated Time of Arrival

ETD — Estimated Time of Departure

ETE — Estimated Time Enroute

ETOPS — Extended Range Operation with two-engine airplanes

EVS — Enhanced Vision System

EWINS — Enhanced Weather Information System

F

FA — Area Forecast

FAA — Federal Aviation Administration

FACF — Final Approach Course Fix

FAF — Final Approach Fix

FAIL — Failure

FANS — Future Air Navigation System

FAP — Final Approach Point

FAR — Federal Aviation Regulation

FAT — Final Approach Track

FATO — Final Approach and Take-off Area

FAWP — Final Approach Waypoint

FB — Fly-by

FCP — Final Control Point

FDC — Flight Data Center

FIC — Flight Information Center

FIR — Flight Information Region

FIS — Flight Information Service

FL — Flight Level (Altitude)

FLD — Field

FLG — Flashing

FLT — Flight

FM — Fan Marker

FMC — Flight Management Computer

FMS — Flight Management System

FPM — Feet Per Minute

FPNM — Feet Per Nautical Mile

FPR — Flight Planning Requirements

FREQ — Frequency

FSS — Flight Service Station

FT — Feet

FTS — Flexible Track System

G

G — Guards only (radio frequencies)

GA — General Aviation

GBAS — Ground-Based Augmentation System

GCA — Ground Controlled Approach (radar)

GCO — Ground Communication Outlet

GEN — General

GLONASS — Global Orbiting Navigation Satellite System

GLS — Global Navigation Satellite System [GNSS] Landing System

GMT — Greenwich Mean Time

GND — Ground Control

GND — Surface of the Earth (either land or water)

GNSS — Global Navigation Satellite System

GP — Glidepath

GPS — Global Positioning System

GPWS — Ground Proximity Warning System

GS — Glide Slope

G/S — Ground Speed

GWT — Gross Weight

H

H — Non-Directional Radio Beacon or High Altitude

H24 — 24 Hour Service

HAA — Height Above Airport

HALS — High Approach Landing System

HAS — Height Above Site

HAT — Height Above Touchdown

HC — Critical Height

HDG — Heading

HDTA — High Density Traffic Airports

HF — High Frequency (3-30 MHz)

HGS — Head-up Guidance System

HI — High (altitude)

HI — High Intensity (lights)

HIALS — High Intensity Approach Light System

HIRL — High Intensity Runway Edge Lights

HIWAS — Hazardous Inflight Weather Advisory Service

HJ — Sunrise to Sunset

HN — Sunset to Sunrise

HO — By Operational Requirements

hPa — Hectopascal (one hectopascal = one millibar)

HR — Hours (period of time)

HS — During Hours of Scheduled Operations

HST — High Speed Taxiway Turn-off

HUDLS — Head-Up Display Landing System

HX — No Specific Working Hours

Hz — Hertz (cycles per second)

I

I — Island

IAC — Instrument Approach Chart

IAF — Initial Approach Fix

IAP — Instrument Approach Procedure

IAS — Indicated Airspeed

IATA — International Air Transport Association

IAWP — Initial Approach Waypoint

IBN — Identification Beacon

ICAO — International Civil Aviation Organization

IDENT — Identification

IF — Intermediate Fix

IFR — Instrument Flight Rules

IGS — Instrument Guidance System

ILS — Instrument Landing System

IM — Inner Marker

IMAL — Integrity Monitor Alarm

IMC — Instrument Meteorological Conditions

IMTA — Intensive Military Training Area

INDEFLY — Indefinitely

IN or INS — Inches

INFO — Information

INOP — Inoperative

INS — Inertial Navigation System

INT — Intersection

INTL — International

IORRA — Indian Ocean Random RNAV Area

IR — Instrument Restricted Controlled Airspace

IR — IFR Military Training Route

IS — Islands

ITWS — Integrated Terminal Weather System

I/V — Instrument/Visual Controlled Airspace

J

JAA — Joint Aviation Authority

K

KGS — Kilograms

kHz — Kilohertz

KIAS — Knots Indicated Airspeed

KM — Kilometers

KMH — Kilometer(s) per Hour

KT — Knots

KTAS — Knots True Airspeed

L

L — Locator (Compass)

LAA — Local Airport Advisory

LAAS — Local Area Augmentation System

LACFT — Large Aircraft

LAHSO — Land and Hold Short Operations

LAT — Latitude

LAWRS — Limited Aviation Weather Reporting Station

LBCM — Locator Back Course Marker

LBM — Locator Back Marker

LBS — Pounds (Weight)

LCG — Load Classification Group

LCN — Load Classification Number

Lctr — Locator (Compass)

LDA — Landing Distance Available

LDA — Localizer-type Directional Aid

LDI — Landing Direction Indicator

LDIN — Lead-in Light System

LGTH — Length

LIM — Locator Inner Marker

LIRL — Low Intensity Runway Lights

LLWAS — Low Level Wind Shear Alert System

LLWAS NE — Low Level Wind Shear Alert System Network Expansion

LLWAS RS — Low Level Wind Shear Relocation/Sustainment

LMM — Locator Middle Marker

LNAV — Lateral Navigation

LNDG — Landing

LO — Locator at Outer Marker Site

LOC — Localizer

LOM — Locator Outer Marker

LONG — Longitude

LPV — Localizer Performance with Vertical Guidance

LSALT — Lowest Safe Altitude

LT — Local Time

LTS — Lights

LVP — Low Visibility Procedures

LWIS — Limited Weather Information System

M

M — Meters

MAA — Maximum Authorized Altitude

MAG — Magnetic

MAHF — Missed Approach Holding Fix

MALS — Medium Intensity Approach Light System

MALSF — Medium Intensity Approach Light System with Sequenced Flashing Light

MALSR — Medium Intensity Approach Light System with Runway Alignment Indicator Lights

MAP — Missed Approach Point

MAX — Maximum

MB — Millibars

MBZ — Mandatory Broadcast Zone

MCA — Minimum Crossing Altitude

MCAF — Marine Corps Air Facility

MCAS — Marine Corps Air Station

MCTA — Military Controlled Airspace

MDA — Minimum Descent Altitude

MDA(H) — Minimum Descent Altitude (Height)

MDT — Mountain Daylight Time

MEA — Minimum Enroute Altitude

MEHT — Minimum Eye Height Over Threshold

MEML — Memorial

MET — Meteorological

MF — Mandatory Frequency

MFA — Minimum Flight Altitude

MHA — Minimum Holding Altitude

MHz — Megahertz

MI — Medium Intensity (lights)

MIALS — Medium Intensity Approach Light System

MIL — Military

MIM — Minimum

MIN — Minute

MIRL — Medium Intensity Runway Edge Lights

MKR — Marker Radio Beacon

MLS — Microwave Landing System

MM — Middle Marker

MNM — Minimum

MNPS — Minimum Navigation Performance Specifications

MOA — Military Operation Area

MOCA — Minimum Obstruction Clearance Altitude

MORA — Minimum Off-Route Altitude (Grid or Route)

MRA — Minimum Reception Altitude

MSA — Minimum Safe Altitude

MSL — Mean Sea Level

MST — Mountain Standard Time

MTA — Military Training Area

MTAF — Mandatory Traffic Advisory Frequency

MTCA — Minimum Terrain Clearance Altitude

MTMA — Military Terminal Control Area

MTOW — Maximum Take-off Weight

MUN — Municipal

MVA — Minimum Vectoring Altitude

N

N — Night, North or Northern

NA — Not Authorized

NAAS — Naval Auxiliary Air Station

NADC — Naval Air Development Center

NAEC — Naval Air Engineering Center

NAF — Naval Air Facility

NALF — Naval Auxiliary Landing Field

NAP — Noise Abatement Procedure

NAR — North American Routes

NAS — Naval Air Station

NAT — North Atlantic Traffic

NAT/OTS — North Atlantic Traffic/Organized Track System

NATL — National

NAVAID — Navigational Aid

NCA — Northern Control Area

NCRP — Non-Compulsory Reporting Point

NDB — Non-Directional Beacon/Radio Beacon

NE — Northeast

NM — Nautical Mile(s)

No — Number

NoPT — No Procedure Turn

NOTAM — Notices to Airmen (or Chart Change Notices)

NPA — Non-Precision Approach

NW — Northwest

NWC — Naval Weapons Center

O

O/A — On or About

OAC — Oceanic Area Control

OAS — Obstacle Assessment Surface

OCA — Oceanic Control Area

OCA (H) — Obstacle Clearance Altitude (Height)

OCL — Obstacle Clearance Limit

OCNL — Occasional

OCTA — Oceanic Control Area

ODALS — Omni-Directional Approach Light System

OM — Outer Marker

OPS — Operations or Operates

O/R — On Request

O/T — Other Times

OTR — Oceanic Transition Route

OTS — Out-of-Service

P

PA — Precision Approach

PAL — Pilot Activated Lighting

PANS-OPS — Procedures for Air Navigation Services - Aircraft Operations

PAPI — Precision Approach Path Indicator

PAR — Precision Approach Radar

PCL — Pilot Controlled Lighting

PCN — Pavement Classification Number

PCZ — Positive Control Zone

PDC — Pre-Departure Clearance

PDG — Procedure Design Gradient

PDT — Pacific Daylight Time

PERM — Permanent

PinS — Point In Space

PISTON — Piston Aircraft

PJE — Parachute Jumping Exercise

PLASI — Pulsating Visual Approach Slope Indicator

PPO — Prior Permission Only

PPR — Prior Permission Required

PRA — Precision Radar Approach

PRM — Precision Radar Monitor

P-RNAV — Precision RNAV

PROC — Procedure

PROP — Propeller Aircraft

PSP — Pierced Steel Planking

PST — Pacific Standard Time

PTO — Part Time Operation

PVT — Private Operator

Q

QDM — Magnetic bearing to facility

QDR — Magnetic bearing from facility

QFE — Height above airport elevation (or runway threshold elevation) based on local station pressure

QNE — Altimeter setting 29.92" Hg or 1013.2 Mb.

QNH — Altitude above sea level based on local station pressure R R-063 or 063R Magnetic Course (radial) measured as 063 from a VOR station. Flight can be inbound or outbound on this line.

R

RA — Radio Altimeter

RAI — Runway Alignment Indicator

RAIL — Runway Alignment Indicator Lights

RAIM — Receiver Autonomous Integrity Monitoring

RAPCON — Radar Approach Control

RASS — Remote Altimeter Source

RCAG — Remote Communications Air Ground

RCC — Rescue Coordination Center

RCL — Runway Centerline

RCLM — Runway Center Line Markings

RCO — Remote Communications Outlet

REF — Reference

REIL — Runway End Identifier Lights

REP — Reporting Point

RESA — Runway End Safety Area

REV — Reverse

REP — Ramp Entrance Point

RF — Radius to Fix

RL — Runway (edge) Lights

RNAV — Area Navigation

RNP — Required Navigation Performance

RNPC — Required Navigation Performance Capability

ROC — Rate of Climb

RPT — Regular Public Transport

RSA — Runway Safety Area

RTE — Route

RTF — Radiotelephony

RTS — Return to Service

RVR — Runway Visual Range

RVSM — Reduced Vertical Separation Minimum

RVV — Runway Visibility Values

RW — Runway

RWY — Runway

S

S — South or Southern

SAAAR — Special Aircrew and Aircraft Authorization Required

SALS — Short Approach Light System

SALSF — Short Approach Light System with Sequenced Flashing Lights

SAP — Stabilized Approach

SAR — Search and Rescue

SATCOM — Satellite voice air-ground calling

SAWRS — Supplementary Aviation Weather Reporting Station

SBAS — Satellite-Based Augmentation System

SCA — Southern Control Area

SCOB — Scattered Clouds or Better

SDF — Simplified Directional Facility

SE — Southeast

SEC — Seconds

SELCAL — Selective Call System

SFL — Sequenced Flashing Lights

SFL-V — Sequenced Flashing Lights - Variable Light Intensity

SFR — Special Flight Rules

SID.gif — Standard Instrument Departure

SIGMET — Significant Meteorological Information

SIWL — Single Isolated Wheel Load

SKD — Scheduled

SLP — Speed Limiting Point

SM — Statute Miles

SMA — Segment Minimum Altitude

SMGCS — Surface Movement Guidance and Control System

SMSA — Segment Minimum Safe Altitude

SOC — Start of Climb

SODALS — Simplified Omnidirectional Approach Lighting System

SPAR — French Light Precision Approach Radar

SRA — Special Rules Area

SRA — Surveillance Radar Approach

SRE — Surveillance Radar Element

SR-SS — Sunrise-Sunset

SSALF — Simplified Short Approach Light System with Sequenced Flashing Lights

SSALR — Simplified Short Approach Light System with Runway Alignment Indicator Lights

SSALS — Simplified Short Approach Light System

SSB — Single Sideband

SSR — Secondary Surveillance Radar (in U.S.A. ATCRBS)

STAR.gif — Standard Terminal Arrival Route (USA)

STAR.gif — Standard Instrument Arrival (ICAO)

STD — Indication of an altimeter set to 29.92" Hg or 1013.2 Mb without temperature correction

Std — Standard

ST-IN — Straight-in

STOL — Short Take-off and Landing

SW — Single Wheel Landing Gear

SW — Southwest

SYS — System

T

° T — True (degrees)

T — Terrain clearance altitude (MOCA)

T — Transmits only (radio frequencies)

T-VASI — Tee Visual Approach Slope Indicator

TA — Transition Altitude

TA — Traffic Advisory

TAA — Terminal Arrival Altitude

TAA — Terminal Arrival Area

TACAN — Tactical Air Navigation (bearing and distance station)

TAS — True Air Speed

TCA — Terminal Control Area

TCAS — Traffic Alert and Collision Avoidance System

TCH — Threshold Crossing Height

TCTA — Transcontinental Control Area

TD — Time Difference

TDWR — Terminal Doppler Weather Radar

TDZ — Touchdown Zone

TDZE — Touchdown Zone Elevation

TEMP — Temporary

TERPS — United States Standard for Terminal Instrument Procedure

THR — Threshold

TIBA — Traffic Information Broadcast by Aircraft

TIBS — Telephone Information Briefing Service

TL — Transition Level

TMA — Terminal Control Area

TML — Terminal

TMN — Terminates

TMZ — Transponder Mandatory Zone

TNA — Transition Area

TODA — Take-off Distance Available

TORA — Take-off Run Available

TP — Turning Point

TRACON — Terminal Radar Approach Control

TRANS — Transition(s)

TRANS ALT — Transition Altitude

TRANS LEVEL — Transition Level

TRCV Tri-Color — Visual Approach Slope Indicator

TRSA — Terminal Radar Service Area

TSA — Temporary Segregated Area

TVOR — Terminal VOR

TWEB — Transcribed Weather Broadcast

TWIP — Terminal Weather Information for Pilots

TWR Tower — (Aerodrome Control)

TWY — Taxiway

U

U — Unspecified

U — UNICOM

UFN — Until Further Notice

UHF — Ultra High Frequency (300-3000 MHz)

UIR — Upper Flight Information Region

UNCT’L — Uncontrolled

UNICOM — Aeronautical Advisory Service

UNICOM (A) — Automated UNICOM

UNL — Unlimited

U/S — Unserviceable

USAF — US Air Force

USB — Upper Sideband

USN — US Navy

UTA — Upper Control Area

UTC — Coordinated Universal Time

UWS — Urgent Weather SIGMET

V

VAR — Magnetic Variation

VAR — Volcanic Activity Reporting

VASI — Visual Approach Slope Indicator

VCOA — Visual Climb Over the Airport

VDA — Vertical Descent Angle

VDP — Visual Descent Point

VE — Visual Exempted

VFR — Visual Flight Rules

VGSI — Visual Glide Slope Indicator

VHA — Volcanic Hazard Area

VHF — Very High Frequency (30-300 MHz)

VIS — Visibility

VMC — Visual Meteorological Conditions

VNAP — Vertical Noise Abatement Procedures

VNAV — Vertical Navigation

VOLMET — Meteorological Information for Aircraft in Flight

VOR — Very High Frequency Omnidirectional Range

VORTAC — VHF Omnidirectional Range/Tactical Air Navigation

VOT — Radiated Test Signal VOR

VPA — Vertical Path Angle

VR — VFR Military Training Route

VV — Vertical Visibility

V/V — Vertical Velocity or speed

W

W — West or Western

WAAS — Wide Area Augmentation System

WA — AIRMET

WAC — World Aeronautical Chart

WFO — Weather Forecast Office

WGS-84 — World Geodetic System of 1984

W/O — Without

WP — Area Navigation (RNAV) Waypoint

WP — Waypoint

WS — SIGMET

WSP — Weather Systems Processor

WST — Convective Significant Meteorological Information

WW — Severe Weather Watch Bulletin

WX — Weather

X

X — On Request

Y

NO ENTRIES

Z

Z — Zulu Time

Z — Coordinated Universal Time (UTC)