3D

3 Dimensional

4D

4 Dimensional

5LNC

5 Letter Name Code

A-RNP

Advanced Required Navigation Performance

A340

Airbus 340 Series

AAIM

Aircraft Autonomous Integrity Monitoring

ABAS

Aircraft Based Augmentation System

AC

Advisory Circular

ADS-B

Automatic Dependent Surveillance - Broadcast

ADS-C

Automatic Dependent Surveillance – Contract

AFCS

Automatic Flight Control System

AFM

Aircraft Flight Manual

AGL

Above Ground Level

AHRS

Attitude and Heading Reference System

AIC

Aeronautical Information Circular

AIE

Average Individual Exposure

AIP

Aeronautical Information Publication

AIRAC

Aeronautical Information Regulation and Control

AIS

Aeronautical Information Service

AMC

Acceptable Means of Compliance

ANC

Air Navigation Commission

ANT

Airspace and Navigation Team (previous EUROCONTROL team responsible for Nav Applications))

AO

Aircraft Operator

AOC

Airline Operating Company

APCH

Approach

APV

Approach with Vertical Guidance

AR

Authorisation Required

ARINC

Aeronautical Radio Inc

ARNS

Aeronautical Radio Navigation Service

ATA

Actual Time of Arrival

ATS

Air Traffic Service

B-RNAV

Basic Area Navigation (now RNAV 5)

B737-700

Boeing 737 Series

B747-400

Boeing 747 Series

BA

British Airways

BDS

Beidou System (Chinese Satellite Constellation)

CA

Course to Altitude (Path Terminator)

CAA

Civil Aviation Authority

CASA

Civil Aviation Safety Authority of Australia

CAT

Category

CCO

Continuous Climb Operations

CD ROM

Compact Disk Read Only Memory

CDFA

Continuous Descent Final Approach

CDI

Course Deviation Indicator

CDO

Continuous Descent Operations

CF

Course to Fix (Path Terminator)

CFIT

Controlled Flight Into Terrain

CFR

Code of Federal Regulations

CNS

Communication, Navigation and Surveillance

COG

Coordinating Group

COM

Communication

CPDLC

Controller Pilot Datalink Communications

DA/H

Decision Altitude/Height

DB

Database

DF

Direct to Fix (Path Terminator)

DME

Distance Measuring Equipment

DO

Document

DOC

Designated Operational Coverage

DOP

Dilution of Precision

EASA

European Aviation Safety Agency

ED

EUROCAE Document

EGNOS

European Geostationary Navigation Overlay Service (European implementation of SBAS)

ENTR

En-Route Hold

ESA

European Space Agency

ETA

Estimated Time of Arrival

ETRF

European Terrestrial Reference Frame

EUR

European Region

EUROCAE

European Organization for Civil Aviation Equipment

EUROCONTROL

European Organisation Supporting European Aviation

FA

Fix to Altitude (Path Terminator)

FAA

Federal Aviation Administration

FAF

Final Approach Fix

FANS

Future Air Navigation Systems

FAP

Final Approach Point

FD

Flight Director or Fault Detection

FDE

Fault Detection and Exclusion

FGS

Flight Guidance System

FIR

Flight Information Region

FL

Flight Level

FM

Fix to Manual Termination (Path Terminator)

FMC

Flight Management Computer

FMS

Flight Management System

FOSA

Flight Operational Safety Assessment

FPL

Flight Plan

FRT

Fixed Radius Transition

FTE

Flight Technical Error

GBAS

Ground Based Augmentation System

GLONASS

Globalnaya Navigatsionnaya Sputnikovaya Sistema (Russian Satellite Constellation)

GNSS

Global Navigation Satellite System

GNSSP

Global Navigation Satellite Systems Panel (ICAO - superseded by the NSP)

GPS

NAVSTAR Global Positioning System (US Satellite Constellation)

HA

Racetrack Course Reversal (Altitude Termination) - (Path Terminator)

HF

Racetrack (Single Circuit - Fix Termination) - (Path Terminator)-- or -- High Frequency

HM

Racetrack (Manual Termination) - (Path Terminator)

HSI

Horizontal Situation Indicator

IAF

Initial Approach Fix

IANS

EUROCONTROL Institute of Air Navigation Services

IATA

International Air Transport Association

ICCAIA

International Coordinating Council of Aerospace Industries Associations

IF

Initial Fix or Intermediate Fix

IFALPA

International Federation of Air Line Pilots' Associations

IFPP

Instrument Flight Procedures Panel (ICAO)

IFR

Instrument Flight Rules

II/III

Category II / III (Precision Approach minima)

ILS

Instrument Landing System

INS

Inertial Navigation System

IRE

Instrument Runway End

IRS

Inertial Reference System

IRU

Inertial Reference Unit

ISA

International Standard Atmosphere

ITRF

International Terrestrial Reference Frame

ITRS

International Terrestrial Reference System

JAA

Joint Aviation Authorities (superseded by EASA starting in 2003)  

JARs/FAR

Joint Aviation Requirement

JTIDS

Joint Tactical Information Distribution System

LNAV

Lateral Navigation

LOA

Letter of Acceptance

LOC

Localiser

LORAN

LOng RAnge Navigation

LPV

Localizer Performance with Vertical Guidance

LRNS

Long-Range Navigation System

MAPt

Missed Approach Point

MASPS

Minimum Aviation System Performance Standards

MCC

Master Control Centre

MCDU

Multi-function Control and Display Unit

MDA

Minimum Descent Altitude

MDH

Minimum Descent Height

MEL

Minimum Equipment List

MLS

Microwave Landing System

MOPS

Minimum Operational Performance Standards

MSA

Minimum Safe Altitude

NAV

Navigation

NAVAID

Navigation Aid

ND

Navigation Display

NDB

Non Directional Beacon

NM

Nautical Mile

NOTAM

Notice to Airmen

NPA

Non-Precision Approach

NSE

Navigation Sensor Error

OCH

Obstacle Clearance Height

OCP

Obstacle Clearance Panel (superseded by IFPP)

OPS

Operations

PDOP

Position Dilution of Precision

P-RNAV

Precision Area Navigation (≈ RNAV 1)

PA

Precision Approach

PANS-ATM

Procedures for Air Navigation Services - Air Traffic Management

PBN

Performance Based Navigation

PC

Personal Computer

PDE

Path Definition Error

PDT

Procedure Design Tool

PEE

Position Estimation Error

PIRG

Planning and Implementation Regional Group (ICAO)

PSE

Path Steering Error

R/W

Runway

RAD

Route Adherence Document or Regulatory Approach Document

RAIM

Receiver Autonomous Integrity Monitoring

RF

Radius to Fix (ARINC 424 Path Terminator)

RNAV

Area Navigation

RNP

Required Navigation Performance

RNPC

Required Navigation Performance Capability

RNPSORSG

RNP Special Operational Requirements Study Group

RNSS

Radio Navigation Satellite Services

RSS

Root Sum Square

RTCA

Radio Technical Commission for Aeronautics

SARPs

Standards and Recommended Practices

SASP

Separation and Airspace Safety Panel (ICAO)

SATCOM

Satellite Communications

SBAS

Satellite Based Augmentation System

SG

Study Group

SID

Standard Instrument Departure

SIS

Signal in Space

SPS

Standard Positioning Service (GPS)

STAR

Standard Arrival Route

SUR

Surveillance

SV

Satellite

T/O

Take Off

TAWS

Terrain Alert Warning System

TCCA

Transport Canada

TDMA

Time Divisional Multiple Access

TF

Track to Fix (Path Terminator) or Task Force

TGL

Temporary Guidance Leaflet

TOAC

Time Of Arrival Control

TOGA

Take Off/Go Around

TSE

Total System Error

TSO

Technical Standard Order

UIR

Upper Information Region

VA

Heading to Altitude (Path Terminator)

VFR

Visual Flight Rules

VHF

Very High Frequency

VM

Heading to Manual Termination (Path Terminator)

VNAV

Vertical Navigation

VOR

Very High Frequency Omnidirectional Ranging

WAAS

Wide Area Augmentation System (US implementation of SBAS)

WGS-84

World Geodetic System 1984

WPT

Waypoint