Acronym

Definition

Topic

…T

Bearing (true)

Navigation

A

Amber

Aerodrome

A/A

Air to air

Air traffic control

A/G

Air-to-ground

Air traffic control

AAA

Amended meteorological message

Meteorology

AAAA

Aerial Application Association of Australia

Organisation

AAC

Airworthiness Advisory Circular

Publications and charts

AACC

Area approach control centre

Air traffic control

AAD

Assigned altitude deviation

Navigation

AAIM

Aircraft Autonomous Integrity Monitor

Navigation

AAIS

Automatic aerodrome information service

Communication and Navigation

AAL

Above aerodrome level

Flight planning

AAM

Advanced air mobility

Administrative

AAR

Authorised Airworthiness Representative

Airworthiness and Publications and charts

AAR

Actual Arrival Report

Reporting

AAT

Administrative Appeals Tribunal

Organisation

ABAA

Amateur Built Aircraft Acceptance

Certification

ABAS

Aircraft Based Augmentation System

Navigation

ABF

Australian Ballooning Federation

Organisation

ABI

Airspace boundary information

Airspace

ABI

Advance boundary information

Airspace

ABM

Abeam

Navigation

ABN

Aerodrome beacon

Aerodrome

ABT

About

Miscellaneous

AC

Advisory Circular

Publications and charts

ACA

Australian Commonwealth Authority

Organisation

ACARS

Aircraft communication addressing and reporting system (pronounced ‘AY-CARS’)

Reporting

ACAS

Airborne Collision Avoidance System

Safety

ACC

Area control centre

Navigation

ACCID

Accident

Reporting

ACD

Airways clearance delivery

Air traffic control

ACFT

Aircraft

Aircraft

ACJ-XXX

Advisory Circular Joint (issued by the JAA, can be followed by a country code)

Publications and charts

ACK

Acknowledge

Communication

ACL

Altimeter check location

Navigation

ACMA

Australian Communications and Media Authority

ACN

Aircraft classification number

Aerodrome

ACPT

Accept, accepted

Communication

ACROB

Acrobatics

Flight operations

AD

Airworthiness Directive

Publications and charts

AD

Aerodrome

Aerodrome

ADA

Advisory area

Flight planning

ADAO

Authorised Design Approval Organisation                                                                     

Organisation

ADC

Aerodrome chart

Aerodrome

ADDGM

Aerodrome diagrams

Aerodrome

ADDN

Addition, additional

Measurement

ADF

Automatic Direction Finding (equipment)

Navigation

ADF

Australian Defence Force

Organisation

ADIZ

Air Defence Identification Zone

Airspace

ADJ

Adjacent

Flight planning

ADO

Aerodrome office

Aerodrome

ADQ

Adequate aerodrome

Aerodrome

ADR

Advisory route

Flight planning

ADS

Automatic Dependent Surveillance

Navigation and Surveillance

ADS-B

Automatic Dependent Surveillance – Broadcast

Navigation and Surveillance

ADS-C

Automatic Dependent Surveillance – Contract

Navigation and Surveillance

ADSU

Automatic Dependent Surveillance Unit

Navigation and Surveillance

ADZ

Advise

Flight operations

AEP

Aerodrome emergency plan

Aerodrome

AER

Authorised Engineering Representative

Organisation

AERIS

Automatic en route information service

Communication

AFAF

Australian Future Airspace Framework

AFAP

Australian Federation of Air Pilots

Organisation

AFCS

Automatic flight control system

Airworthiness

AFIL

Air-Filed Flight Plan

Flight planning

AFIS

Aerodrome flight information service

Communication

AFM

Aircraft Flight Manual

Manuals and handbooks

AFRU

Aerodrome Frequency Response Unit (also known as a “beepback” unit)

Aerodrome

AFS

Aeronautical fixed service

Navigation

AFT

After

Miscellaneous

AFTN

Aeronautical fixed telecommunication network

Navigation

AFZ

Australian fishing zone(s)

Navigation

Ag

Agriculture

Organisation

AGA

Again

Miscellaneous

AGD

Attorney-General’s Department

Organisation

AGL

Above Ground Level

Flight planning

AH

Artificial Horizon

Instrumentation

AI

Artificial intelligence

AIC

Aeronautical Information Circular

Publications and charts

AIDC

Air traffic services inter-facility data communications

Air traffic control

AIP

Aeronautical Information Publication

Publications and charts

AIP ENR

Aeronautical Information Publication En-route

Publications and charts

AIP ERSA

Aeronautical Information Publication En-route Supplement Australia

Publications and charts

AIP Gen

Aeronautical Information Package (AIP) – General

Cabin Safety

AIP Gen

Aeronautical Information Package (AIP) – General

Publications and charts

AIRAC

Aeronautical Information Regulation and Control

Publications and charts

AIRC

Aeronautical Information and Control

Navigation

AIREP

Air-Report

Navigation

AIRMET

Airman’s Meteorological Information

Meteorology

AIS

Aeronautical Information Service

Navigation

AL

Approach Lights

Aerodrome

ALA

Aircraft Landing Area

Ground Operations

ALA

Alighting area

Ground Operations

ALA

Aircraft Landing Area

Aerodrome

ALAEA

Australian Licensed Aircraft Engineers Association

Organisation

ALARP

As Low as Reasonably Practical

Flight planning

ALERFA

Alert phase

Safety

ALI

Airworthiness Limitation Item

Airworthiness

ALM

Aircraft Landing Minima

Flight planning

ALR

Alerting Message

Safety

ALRS or ALS

Approach lighting system

Aerodrome

ALT

Altitude

Flight planning

ALTN

Alternate

Flight planning

ALTN

Alternating (light alternates in colour)

Aerodrome

AMA

Area minimum altitude

Flight planning

AMC/GM

Acceptable Means of Compliance/Guidance Material

Regulations

AMD

Amend, Amended

Communication

AMDT

Amendment (AIP amendment)

Regulations

AME

Aircraft Maintenance Engineer

Aircraft maintenance

AMO

Approved Maintenance Organisation

Organisation

AMP

Aircraft Maintenance Program

Training

AMPA

Authorised Maintenance Personnel Assessor

Aircraft maintenance

AMRD

Australian Maintenance Requirements Document

Regulations

AMS

Aircraft Maintenance Specialist

Aircraft maintenance

AMSA

Australian Maritime Safety Authority

Organisation

AMSL

Above Mean Sea Level

Measurement

AMSS

Aeronautical mobile satellite service

Navigation

AMT

Aircraft Maintenance Technician

Aircraft maintenance

ANA

Air Navigation Act. Administered by Department of Infrastructure, Transport, Regional Development and Communications.

Cabin Safety

ANC

Aeronautical Chart 1:50,000 (followed by name/title)

Navigation

ANCS

Aeronautical navigation chart – small scale (followed by name/title and scale)

Navigation

ANO

Air Navigation Order

Regulations

ANR

Air Navigation Regulations. Administered by Department of Infrastructure, Transport, Regional Development and Communications.

Cabin Safety

ANS

Answer

Communication

ANTA

Australian National Training Authority

Organisation

ANVIS

Aviator Night Vision Imaging Systems

Night operations

AO

Air Operator

Organisation

AOC

Air Operator’s Certificate (AOC)

Certification

AOC

Aerodrome Obstacle Chart (followed by name/title)

Navigation

AOCM

Air Operators Certification Manual

Manuals and handbooks

AOD

Alcohol and Other Drugs

Regulations

AOPA

Aircraft Owners and Pilots Association

Organisation

AP

Airport

Organisation

APAPI

Abbreviated Precision Approach Path Indicator (pronounced ‘AY-PAPI’)

Navigation

APCH

Approach

Navigation

APDC

Aircraft Parking/Docking Chart (followed by name/title)

Navigation

APF

Australian Parachute Federation

Organisation

APMA

Australian Parts Manufacturer Approval

Regulations

APN

Apron

Aerodrome

APP

Approach Control

Navigation

APRX

Approximate, Approximately

Navigation

APSG

After Passing

Communication

APU

Auxillary power unit

Ground Operations

APV

Approach with Vertical Guidance

Flight planning

AQZ

Area QNH Zone

Flight planning

ARC

Area Chart

Flight planning

ARFFS

Aerodrome Rescue and Fire Fighting Service (sometimes referred to as RFFS)

Search and rescue

ARFL

Aeroplane Reference Field Length

Ground Operations

ARFO

Area Forecast (now called Graphical area forecasts (GAF))

Meteorology

ARH

Aircraft Registration Holder

Organisation

ARM

Airspace Risk Model

Certification

ARN

Aviation Reference Number – the number given to a pilot or engineer by CASA which appears on their licence.

Licensing

ARNG

Arrange

Ground Operations

ARO

Air traffic services reporting office

Organisation

AROC

Aircraft radio operator certificate

Certification

AROCOP

Aircraft Radiotelephone Operator Certificate of Proficiencyv

Certification

ARP

Aerodrome reference point

Aerodrome

ARP

Air-Report (message type designator)

Reporting

ARQ

Automatic error correction

Safety

ARR

Arrive, Arrival

Flight planning

ARS

Special Air-Report (message type designator)

Reporting

ARST

Arresting (specify (part of) aircraft arresting equipment)

Flight operations

AS

Australian Standard

Manuals and handbooks

ASA

Australian Skydiving Association

Organisation

ASAC

Australian Sports Aviation Confederation

Organisation

ASAP

As Soon as Possible

Miscellaneous

ASC

Ascend to or ascending

Communication

ASDA

Accelerate-stop distance available

Aerodrome

ASE

Altimetry System Error

Systems

ASEPTA

Approved Single-engine Turbine Aeroplane

Aircraft

ASF

Aviation Safety Forum

Safety

ASH

Aviation Services Handbook

Publications and charts

ASI

Aviation Safety Index

Safety

ASI

Air Speed Indicator

Instrumentation

ASIR

Aviation Safety Incident Report

Reporting

ASPH

Asphalt

Ground Operations

ASR

Area Surveillance Radar

Navigation

ASRA

Australian Sport Rotorcraft Association

Organisation

ASSI

Air Safety Support International- a wholly-owned subsidiary of the UK Civil Aviation Authority

Organisation

ASTM

American Society for Testing Materials

Organisation

ASTRA

Australian Strategic Air Traffic Management Group

Organisation

AT…

At (followed by time at which weather change is forecast to occur)

Meteorology

ATA

Actual Time of Arrival

Flight planning

ATA

Air Transport Association

Organisation

ATA CSDD

Air Transport Association Common Support Data Dictionary

Publications and charts

ATC

Air Traffic Control (in general)

Air traffic control

ATD

Actual Time of Departure

Flight planning

ATEL/ANAV

Aeronautical Telecommunication and Radio Navigation Services

Communication

ATFM

Air Traffic Flow Management

Air traffic control

ATIS

Automatic terminal information service

Communication

ATM

Air traffic management

Air traffic control

ATN

Aeronautical Telecommunication network

Communication

ATP

At time or place

Communication

ATPL

Air Transport Pilot Licence

Licensing

ATS

Air Traffic Service(s)

Air traffic control

ATSB

Australian Transport Safety Bureau

Organisation

ATSO

Australian Technical Standard Order

Regulations

ATSOA

Australian Technical Standard Order Authorisation

Regulations

ATTN

Attention

Communication

ATZ

Aerodrome traffic zone

Aerodrome

AUF

Australian Ultralight Federation (now Recreational Aviation Australia)

Organisation

AUTH

Authorised, Authorisation

Regulations

AUW

All Up Weight

Measurement

AUX

Auxiliary

Instrumentation

AVBL

Available

Flight planning

AVG

Average

Flight planning

AVGAS

Aviation Gasoline

Ground Operations

AVM

Abrupt Vertical Manoeuvres (by the MIL) (NOTAM or charts)

Communication

AWB

Airworthiness Bulletin

Publications and charts

AWIB

Aerodrome Weather Information Broadcast

Communication

AWK

Aerial Work (Air work – general aviation)

Flight operations

AWO

Aerial work operation

Flight operations

AWS

Automatic Weather Station

Meteorology

AWTA

Advise as to what time is available

Flight planning

AWY

Airway

Aircraft

AZM

Azimuth

Measurement

B

Blue

Miscellaneous

BA

Braking action

Safety

BAK

Basic aeronautical knowledge

Training

BASA

Bilateral Aviation Safety Agreement

Regulations

BASE

Cloud Base (met)

Meteorology

BCFG

Fog Patches (met)

Meteorology

BCN

Beacon (aeronautical ground light)

Navigation

BCST

Broadcast

Communication

BDRY

Boundary

Ground Operations

BECMG

Becoming

Meteorology

BFR

Before

Miscellaneous

BIP-M

Basic Instruction Package for Meteorologists

Meteorology

BIPMT

Basic Instruction Package for Meteorological Technicians

Meteorology

BKN

Broken (cloud descriptor) (met)

Meteorology

BL…

Blowing (followed by DU=dust, SA=sand or SN=snow)

Meteorology

BLDG

Building

Organisation

BLO

Below Clouds

Meteorology

BLW

Below

Meteorology

BOM

Bureau of Meteorology

Organisation

BOMB

Bombing

Navigation

BR

Mist

Meteorology

BRG

Bearing

Communication

BRKG

Braking

Aerodrome

BRW

Brakes release weight

Aerodrome

BS

Broadcasting Station (Commercial)

Communication

BTL

Between Layers

Navigation

BTN

Between

Meteorology

BVLOS

Beyond visual line of sight

RPAS

C

Centre (Runway)

Aerodrome

CA

Course Acquisition

Ground Operations

CA Act

Civil Aviation Act (1988)

Cabin Safety

CA/GRO

Certified Air/Ground Radio Operator

Certification

CA/GRS

Certified Air/Ground Radio Service

Communication

CAA

The Civil Aviation Act 1988

Regulations

CAA NZ

Civil Aviation Authority New Zealand

Organisation

CAAP

Civil Aviation Advisory Publications

Cabin Safety

CAAP

Civil Aviation Advisory Publications

Regulations

CAGRO

Certified Air Ground Radio Operation

Communication

CAMO

Continuing Airworthiness Management Organisation

Organisation

CAMP

Continuous Airworthiness Maintenance Program

Regulations

CAO

Civil Aviation Orders

Cabin Safety

CAO

Civil Aviation Orders

Regulations

CAR

Civil Aviation Regulations (1988)

Cabin Safety

CAR

Civil Aviation Regulations (1988)

Regulations

CAS

Calibrated air speed

Flight operations

CASA

Civil Aviation Safety Authority

Organisation

CASR

Civil Aviation Safety Regulations (1998)

Cabin Safety

CASR

Civil Aviation Safety Regulations (1998)

Regulations

CAT

Clear Air Turbulence

Meteorology

CAVOK

Cloud and Visibility OK

Meteorology

CB

Cumulonimbus (met)

Meteorology

CBT

Competency-based Training

Training

CC

Cirrocumulus (met)

Meteorology

CCA

Corrected meteorological message (or CCB, CCC..etc. in sequence) (message type designator)

Meteorology

CCF

Capability Check Flight

Safety

CCTS

Circuits

Aerodrome

CD

Candela

Aerodrome

CDCCL

Critical Design Configuration Control Limit

Safety

CDI

Course Direction Indicator

Instrumentation

CDL

Configuration Deviation List

Airworthiness

CDN

Coordination (message type designator)

Flight operations

CEN

En Route and Area ATC unit

Communication

CEO

Chief Executive Officer

Organisation

CET

Clearance Expiry Time

Search and rescue

CF

Change Frequency to

Communication

CFI

Chief Flying Instructor (replaced by Head of Operations)

Training

CFIT

Controlled Flight into Terrain

Flight operations

CFL

Cleared Flight Level

Communication

CFM

Confirm, I confirm

Communication

CFP

Current flight plan

Flight planning

CG

Centre of gravity

Airworthiness

CGL

Circling guidance light(s)

Aerodrome

CH

Channel continuity check

Navigation

CHG

Modification (message type designator)

Systems

CHTR

Charter

Flight operations

CI

Cirrus (met)

Meteorology

CIDIN

Common ICAO data interchange network

Systems

CIR

Command Instrument Rating

Licensing

CIT

Near, Over Large Town(s)

Air traffic control

CIV

Civil

Instrumentation

CK

Check

Safety

CL

Centre Line

Aerodrome

CLA

Clear type of ice formation

Meteorology

CLBR

Calibration

Measurement

CLD

Cloud (met)

Meteorology

CLG

Calling

Communication

CLIAS

Climbing Indicated Airspeed

Flight operations

CLMAX

Maximum Co-efficient of Lift

Measurement

CLR

Clear, Cleared to… Clearance

Communication

CLSD

Closed, Close, Closing

Measurement

CM (cm)

Centimetre

Measurement

CMB

Climb to or Climbing to

Communication

CMPL

Configuration, Maintenance and Procedures

Systems

CMR

Certification Maintenance Requirements

Certification

CMSD

Commissioned

Systems

CNL

Flight plan cancellation message

Communication

CNS

Communication, Navigation and Surveillance

Communication

COA

Certificates of Approval (issued to maintenance organisations)

Certification

CofA

Certificate of Airworthiness

Certification

COM

Communication

Communication

CONC

Concrete

Measurement

COND

Condition

Meteorology

CONS

Continuous

Measurement

CONST

Construction, Constructed

Navigation

CONT

Continue(s), Continued

Navigation

COOR

Coordinate, Coordinated

Navigation

COORD

Coordinates

Navigation

COP

Change over point

Safety

CoR

Certificate of Registration

Certification

COS

Conical Surface

Measurement

COT

At the Coast, Coastal

Navigation

COV

Cover, Covered, Covering

Safety

CP

Chief pilot

Flight crew

CPDLC

Controller-Pilot Data Link Communication

Communication

CPL

Commercial Pilot Licence. Commercial pilots may fly for hire or reward (with some restrictions)

Licensing

CRC

Cyclic redundancy check

Safety

CRIS

Cost Recovery Impact Statement

Regulations

CRM

Crew Resource Management

Cabin Safety

CRZ

Cruise

Navigation

CS

Call sign

Communication

CSDD

Common Support Data Dictionary

Publications and charts

CSU

Constant Speed Unit

Instrumentation

CTA

Control Area

Navigation

CTAF

Common Traffic Advisory Frequency

Communication

CTAF(R)

Common Traffic Advisory Frequency – (Radio)

Communication

CTAM

Climb to and maintain

Navigation

CTC

Category Technical Competency

Certification

CTC

Contact

Communication

CTL

Control

Air traffic control

CTN

Caution

Air traffic control

CTR

Control Zone

Air traffic control

CU

Cumulus (met)

Meteorology

CUF

Cumuliform (met)

Meteorology

CUST

Customs

Regulations

CVR

Cockpit voice recorder

Instrumentation

CW

Carrier Wave

Communication

CWY

Clearway

Aerodrome

D

Downward (tendency in RVR (Runway visual range) during previous 10 minutes)

Communication

D-ATIS

Data Link Automatic Terminal Information Service (pronounced’DEE-ATIS’)

Systems

D-VOLMET

Data Link VOLMET

Systems

D…

Danger Area (followed by identification)

Flight planning

DA

Decision Altitude

Flight operations

DA/H

Decision Altitude/Height

Flight operations

DAA

Detect and avoid

Instrumentation

DALR

Dry Adiabatic Lapse Rate

Meteorology

DAME

Designated Aviation Medical Examiner

Aviation health and medicine

DAO

Designated Aviation Ophthamologist

Aviation health and medicine

DAP

Departure and Approach Procedures

Manuals and handbooks

DASA

Defence Aviation Safety Authority

DCD

Double channel duplex

Communication

DCKG

Docking

Aerodrome

DCMSD

Decommissioned

Systems

DCPC

Direct Controller-Pilot Communication

Communication

DCS

Double channel simplex

Communication

DCT

Direct (in relation to flight plan clearances and type of approach)

Navigation

DE

Form (used to precede the call sign of the calling station) (to be used in AFS as a procedure signal)

Communication

DEC

December

Meteorology

DEG

Degrees (Compass)

Flight planning

DEP

Depart, Departure, Departed, Departing, Departure Message

Communication

DER

Departure End of Runway

Air traffic control

DER

Designated Engineering Representative

Licensing

DES

Descend to, Descending to

Communication

DEST

Destination

Flight planning

DETRESFA

Distress Phase

Safety

DEV

Deviation, Deviating

Communication

DF

Direction Finder/ Finding

Air traffic control

DFDR

Digital Flight Data Recorder

Instrumentation

DFTI

Distance from touchdown indicator

Navigation

DGA

Distance Measuring Equipment or Global Positioning Satellite System Arrival

Navigation

DH

Decision Height

Safety

DIF

Diffuse

Navigation

DISP

Displaced

Aerodrome

DIST

Distance

Measurement

DITRDC

Department of Infrastructure, Transport, Regional Development and Communications

DIV

Diversion, Divert, Diverting

Navigation

DLA

Delay (message type designator)

Measurement

DLIC

Data Link Initiation Capability

Communication

DLY

Daily

Flight planning

DME

Distance Measuring Equipment

Navigation

DMEN

DME (International)

Navigation

DMEP

DME (International Precision used in conjunction with Microwave Landing System)

Navigation

DNG

Danger, Dangerous

Safety

DoD

Department of Defence

Organisation

DOM

Domestic

Flight planning

DP

Dew Point Temperature

Meteorology

DPT

Depth

Measurement

DR

Dead Reckoning (navigation)

Navigation

DR…

Low drifting (followed by DU=dust, SA=sand or SN=snow)

Meteorology

DRG

During

Navigation

DRMS

Drone rule management system

DS

Dust storm

Meteorology

DSB

Double sideband

Navigation

DTAM

Descend to And Maintain

Communication

DTG

Date-Time Group

Communication

DTHR

Displaced Runway Threshold

Aerodrome

DTRT

Deteriorate, Deteriorating

Meteorology

DTW

Dual tandem wheels

Aircraft

DU

Dust

Meteorology

DUC

Dense Upper Cloud (met)

Meteorology

DUPE

This is a duplicate message (to be used in Aeronautical Fixed Service as a procedure signal)

Communication

DUR

Duration

Measurement

DVOR

Doppler VOR

Navigation

DW

Dual wheels

Aircraft

DZ

Drizzle

Meteorology

E

East, East Longitude

Navigation

E E E

Error (to be used in AFS as a procedure signal)

Communication

EASA

European Aviation Safety Agency

Organisation

EAT

Expected Approach Time

Navigation

EB

Eastbound

Navigation

ECAR

European Civil Aviation Requirement (formerly JAR)

Regulations

EDTO

Extended Diversion Time Operations

Navigation

EET

Estimated Elapsed Time

Flight planning

EFB

Electronic Flight Bag

Systems

EFC

Expect further clearance

Air traffic control

EGNOS

European Geostationary Navigation Overlay System

Navigation

EGPWS

Enhanced Ground Proximity Warning System

Systems

EHF

Extremely high frequency (30,000 to 300,000 MHz)

Communication

EHR

Encumbrance Holder Register

Airworthiness

ELBA

Emergency locator beacon-aircraft

Safety

ELEV

Elevation

Measurement

ELR

Extra Long Range

Measurement

ELT(S)

Emergency Locator Transmitter (Survival)

Safety

EM

Explanatory Memorandum (submitted to EXCO with regulation amendment)

Regulations

EM

Emission

Meteorology

EMBD

Embedded in a Layer (to indicate cumulonimbus embedded in layers of other clouds)

Meteorology

EMERG

Emergency

Safety

EMS

Emergency Medical Service

Safety

EMS

Environment Management System

Systems

END

Stop-end (related to RVR)

Meteorology

ENDCE

Endurance

Flight planning

ENE

East North-East

Navigation

ENG

Engine

Flight operations

ENR

En Route

Navigation

ENRC

En Route Chart (followed by name/title)

Publications and charts

EOBT

Estimated off Blocks Time

Flight planning

EPA

Environment Protection Agency

Organisation

EPIRB

Electronic Position Indicating Radio Beacon (marine term.)

Safety

EQPT

Equipment

Ground Operations

ER

Here..or herewith

Navigation

ERC

En-route Chart

Publications and charts

ERP

Emergency Response Plan

Safety

ERSA

En-route Supplement Australia

Publications and charts

ES

Explanatory Statement (tabled with regulations in Parliament)

Regulations

ESD

Electrostatic sensitive discharge

Communication

ESDE

ESD equipment

Systems

ESE

East Southeast

Navigation

ESIR

Electronic safety incident report

Reporting

EST

Estimate or estimated or estimate (message type designator)

Communication

ETA

Estimated Time of Arrival, Estimating Arrival

Flight planning

ETCM

Engine trend and condition monitoring

Systems

ETD

Estimated Time of Departure, Estimating Departure

Flight planning

ETO

Estimated Time Over significant point

Flight planning

ETOPS

Extended range operations by turbine-engined aeroplanes

Flight planning

ETP

Equi Time Interval

Measurement

ETT

Estimated Time Interval

Flight planning

EV

Every

Miscellaneous

EVLOS

Extended visual line of sight

RPAS

EVTOL

Electric vertical take-off and landing

EVU

Enforceable Voluntary Undertaking

Regulations

EXC

Except

Instrument flight rules

EXCO

Executive Council

Organisation

EXER

Exercises, Exercising, to exercise

Training

EXP

Expect, Expected, Expecting

Communication

EXTD

Extend, Extending, Extended

Communication

F

Fixed (chart symbol)

Publications and charts

FAA

Federal Aviation Administration

Cabin Safety

FAA

Federal Aviation Administration of the USA

Organisation

FAA TSO

Federal Aviation Administration (US) – Technical Standard Order

Cabin Safety

FAA TSO

Federal Aviation Administration (US) – Technical Standard Order

Regulations

FAAOC

Foreign Aircraft Air Operator’s Certificate

Certification

FAC

Facility, Facilities

Ground Operations

FADEC

Full Authority Digital Engine Control

Systems

FAF

Final Approach Fix

Navigation

FAL

Facilitation of International Air

Flight planning

FAP

Final Approach Point

Navigation

FARs

Federal Aviation Regulations (Federal Aviation Administration of the USA)

Organisation

FATO

Final approach and take-off area

Aerodrome

FAWP

Final Approach Waypoint

Navigation

FAX

Facsimile Transmission

Systems

FBL

Light

Meteorology

FC

Funnel Cloud (tornado or water spout)

Meteorology

FCL

Flight Crew Licence/Licensing

Licensing

FCST

Forecast

Meteorology

FCT

Friction coefficient

Measurement

FD

Fault Detection

Safety

FDE

Fault detection and exclusion (in relation to GPS equipment)

Safety

FDL

Fixed Distance Lighting

Aerodrome

FDPS

Flight Data Processing system

Systems

FDS

Flight Director System

Systems

FEL

Flight Engineer Licence

Licensing

FEW

Few (cloud descriptor)

Meteorology

FFR

Flood, Fire Relief

Search and rescue

FG

Fog

Meteorology

FIA

Flight Information Area

Communication

FIC

Flight Information Centre

Communication

FIMS

Flight information management system

FIO

Flight Information Office

Organisation

FIR

Flight Information Region

Navigation

FISA

Flight information service (automated)

Communication

FISS

Flight Information Service Station

Air traffic control

FL

Flight Level

Flight planning

FLD

Field

Navigation

FLG

Flashing

Aerodrome

FLIR

Forward Looking Infra Red

Systems

FLR

Flares

Safety

FLT

Flight

Ground Operations

FLTCK

Flight check

Licensing

FLUC

Fluctuating, Fluctuation, Fluctuated

Measurement

FLW

Follow(s), Following

Navigation

FLY

Fly, Flying

Flight planning

FM

From

Meteorology

FM…

From (followed by time weather change is forecast to begin)

Meteorology

FMS

Flight Management System

Systems

FMU

Flow Management Unit

Instrumentation

FNA

Final Approach

Navigation

FNPT

Flight and Navigation Procedures Trainer

Training

FOI

Flying Operations Inspector

Flight operations

FPD

Flight Plan Designator

Flight planning

FPL

Filed Flight Plan Message

Flight planning

FPM

Feet per Minute

Measurement

FPR

Flight Plan Route

Flight planning

FPV

First person view

Administrative

FR

Fuel Remaining

Flight planning

FREQ

Frequency

Communication

FRMS

Fatigue Risk Management System

Systems

FRNG

Firing (NOTAM)

Communication

FRONT

Front (relating to weather)

Meteorology

FRQ

Frequent

Measurement

FS

Flight Service (in general)

Flight operations

FSA

Flight Safety Australia

Safety

FSL

Full Stop Landing

Flight operations

FSP

Fish Spotting

Certification

FSS

Flight service station

Air traffic control

FST

First

Navigation

FT

Feet

Measurement

FTD

Flight training device

Training

FTE

Full time equivalent

Measurement

FTO

Flight Training Organisation

Organisation

FU

Smoke

Meteorology

FXD

Fixed

Measurement

FZ

Freezing

Meteorology

FZDZ

Freezing Drizzle

Meteorology

FZFG

Freezing Fog

Meteorology

FZL

Freezing Level

Meteorology

FZRA

Freezing Rain

Meteorology

G

Gravity

Measurement

G/A

Ground-to-air

Communication

G/A/G

Ground-to-air and air-to-ground

Communication

GA

General Aviation

Flight operations

GA

Go ahead, resume sending (to be used in AFS as a procedure signal)

Navigation

GAAP

General Aviation Aerodrome Procedures

Flight planning

GAMET

Area forecast for low-level flights

Meteorology

GAPAN

Honourable Company of Air Pilots, Australia, Inc.

Organisation

GBAS

Ground Based Augmentation System

Systems

GCA

Ground Controlled Approach

Ground Operations

GCN

General Computing Network (operated by Airservices Australia)

Systems

GDOP

Geometric Dilution of Precision

Navigation

GEN

General

Miscellaneous

GEO

Geographic, true

Navigation

GES

Ground Earth Station

Communication

GFA

The Gliding Federation of Australia

Organisation

GFY

Glider Flying

Flight operations

GHA

Ground handling agents

Ground Operations

GIVD

Gravity Induced Vestibular Dysfunction

Measurement

GLD

Glider

Flight operations

GLOC

Gravity Induced Loss of Consciousness

Aviation medicine

GLONASS

Global Orbiting Navigation Satellite System (pronounced ‘GLO-NAS’)

Navigation

GM

Guidance Material

Publications and charts

GMC

Ground Movement Chart (followed by name/title)

Publications and charts

GND

Ground

Ground Operations

GNDCK

Ground Check

Ground Operations

GNS

Global Navigation System

Navigation

GNSS

Global navigation satellite system

Navigation

GP

Guiding principles

Regulations

GP

Glide Path

Navigation

GP

FLG Group Flashing (number) (used in conjunction with aerodrome lighting)

Aerodrome

GPI

Glide Path Intercept

Navigation

GPS

Global positioning system (see GNSS)

Navigation

GPWS

Ground proximity warning system

Safety

GR

Hail

Meteorology

GRAD

Minimum Required Climb Gradient

Flight planning

GRAS

Ground Based Regional Augmentation System

Systems

GRASS

Grass Landing Area

Aerodrome

GRIB

Grid point values in binary form

Meteorology

GRVL

Gravel (NOTAM)

Communication

GS

Groundspeed

Flight planning

GS

Graupel (Small Hail and/or Snow Pellets – met)

Meteorology

GUND

Geoid Undulation

Measurement

H24

Continuous day and night service

Communication

HAA

Helicopter Association of Australia

Organisation

HAA

Height Above Aerodrome

Measurement

HAAMC

Head of Aircraft Airworthiness and Maintenance Control

Airworthiness

HALE

High-altitude long endurance

HAM

Head of Aircraft Maintenance

Aircraft maintenance

HAMC

Head of Aircraft Maintenance Control

Aircraft maintenance

HAPI

Helicopter approach path indicator

Instrumentation

HAPs

High-altitude pseudo-satellites

HAT

Height Above Threshold

Measurement

HBN

Hazard Beacon

Safety

HDF

High frequency direction-finding station

Communication

HDG

Heading

Navigation

HDS

Hours of Daylight Saving (NOTAM)

Communication

HEL

Helicopter

Aircraft

HF

Human Factors

Safety

HF

High Frequency (3000 to 30,000 KHZ)

Communication

HFEM

Human Factor and Error Management System

Safety

HGFA

Hang Gliding Federation of Australia Inc

Organisation

HGS

Heads-up Guidance System

Systems

HGT

Height, Height Above

Measurement

HIAL

High Intensity Approach Lighting

Aerodrome

HIOL

High Intensity Obstacle Lights

Aerodrome

HIRL

High Intensity Runway Lighting

Aerodrome

HJ

Sunrise to Sunset (NOTAM or ERSA)

Communication

HLDG

Holding

Flight planning

HLS

Helicopter Landing Site

Aerodrome

HMI

Human-machine Interface

Systems

HN

Sunset to Sunrise (NOTAM or ERSA)

Communication

HO

Service available to meet operational requirements

Aerodrome

HOFO

Head of Flying Operations

Flight operations

HOO

Head of Operations

Ground Operations

HOSP

Hospital Aircraft

Aircraft

HOTAS

Head of Training and Standards

Training

HOTC

Head of Training and Checking

Training

HP

Horse Power

Measurement

HPA

HectoPascal

Measurement

HR

Hours

Measurement

HS

Service available during hours of scheduled operations

Communication

HSL

Hold Short Lights

Aerodrome

HUD

Head Up Display

Systems

HURCN

Hurricane

Meteorology

HVDF

High and very high frequency direction finding stations (at the same location)

Communication

HVY

Heavy (used to indicate the intensity of WX phenomena, eg HVY RA = heavy rain)

Meteorology

HX

No specific working hours (NOTAM or ERSA)

Communication

HYR

Higher

Measurement

HZ

Haze

Meteorology

HZ (hz)

Hertz

Measurement

HZS

Horizontal Surface

Measurement

IA

Inspection authorisation

Airworthiness

IAC

Instrument approach chart (followed by name/title)

Publications and charts

IAF

Initial Approach Fix

Navigation

IAL

Instrument Approach and Landing Chart

Publications and charts

IAO

In and out of clouds

Meteorology

IAP

Instrument Approach Plate

Instrument flight rules

IAR

Intersection of air routes

Instrument flight rules

IAS

Indicated air speed

Measurement

IATA

International Air Transport Association

Organisation

IAW

In Accordance With

Regulations

IAWP

Initial Approach Way-point

Navigation

IBN

Identification Beacon

Systems

IC

Ice Crystals (MET code)

Meteorology

ICA

Instructions for continuing airworthiness (issued by manufacturer or designer)

Airworthiness

ICAO

International Civil Aviation Organization

Organisation

ICE

Icing, Ice

Meteorology

ICUS

In-command Under Supervision

Licensing

ID

Identifier, identify

Flight planning

IDENT

Identification

Licensing

IF

Instrument Flight

Instrument flight rules

IF

Intermediate Approach Fix

Navigation

IFF

Identification Friend/Foe

Communication

IFR

Instrument Flight Rules

Instrument flight rules

IFSD

In-flight Shutdown

Safety

IG

Implementation Group

Organisation

IGA

International general aviation

Organisation

ILS

Instrument Landing System

Instrument flight rules

IM

Inner Marker

Navigation

IMC

Instrument meteorological conditions (other than VMC)

Meteorology

IMC

Indirect Maintenance Cost

Airworthiness

IMI

Interrogation sign

Communication

IMPR

Improve, Improving, Improvement

Safety

IMT

Immediate, Immediately

Measurement

INA

Initial approach

Navigation

INBD

Inbound

Flight planning

INC

In Cloud

Meteorology

INCERFA

Uncertainty Phase

Safety

INFO

Information

Communication

INOP

Inoperative

Safety

INP

If not possible

Communication

INPR

In progress

Communication

INS

Inertial Navigation System

Navigation

INSTL

Install, Installed, Installation

Safety

INSTR

Instrument

Instrumentation

INT

Intersection

Aerodrome

INTER

Intermittent, Intermittently (meteorological)

Meteorology

INTL

International

Administrative

INTRG

Interrogator

Systems

INTRP

Interrupt, Interruption, Interrupted

Navigation

INTSF

Intensify, Intensifying

Navigation

INTST

Intensity

Aerodrome

IoA

Instrument of appointment

Certification

IOC

Indirect Operating Cost

Systems

IPC

Illustrated Parts Catalogue

Publications and charts

IREX

Instrument Training Examination

Training

IRM

Immediately Reportable Matters

Reporting

IRS

Internal Reporting System

Reporting

ISA

International Standard Atmosphere

Meteorology

ISB

Independent Sideband

Communication

ISIM

Integrated Safety Investigation Methodology

Safety

ISO

International Organization for Standardization (e.g. ISO9000)

Organisation

ISOL

Isolated

Meteorology

ITT

Interstage Turbine Temperature

Measurement

IWI

Illuminated Wind Indicator

Aerodrome

IWP

Intermediate Way-point

Flight planning

J-BAR

Jet Barrier

Aerodrome

JAA

Joint Aviation Authorities (of Europe)

Organisation

JAR

Joint Aviation Requirements (of the European JAA)

Organisation

JAR-OPS

JAR Operations

Regulations

JARUS

Joint Authorities for Rulemaking on Unmanned Systems

JTSO

Joint Technical Standard Order

Regulations

JTST

Jet Stream

Meteorology

KDR

Knowledge Deficiency Report

Manuals and handbooks

KG (kg)

Kilograms

Measurement

KHZ (kHz)

Kilohertz

Measurement

KM (km)

Kilometers

Measurement

KMH (km/h)

Kilometers per hour

Measurement

KPA (kPa)

Kilopascals

Measurement

KT (kt)

Knots

Measurement

KW (kw)

Kilowatts

Measurement

L

Left (runway identification)

Aerodrome

L

Locator (see LM, LO)

Navigation

LAAS

Local Area Augmentation System

Systems

LAHSO

Land and Hold Short Operations

Air traffic control

LAME

Licensed Aircraft Maintenance Engineer

Aircraft maintenance

LAN

Inland

Regulations

LAT

Latitude

Measurement

LDA

Landing distance available

Aerodrome

LDG

Landing

Flight operations

LDI

Landing Direction Indicator

Aerodrome

LDP

Landing decision point

Flight planning

LEN

Length

Measurement

LF

Low Frequency (30 to 300 KHZ)

Communication

LGT

Light, Lighting

Aerodrome

LGTD

Lighted

Aerodrome

LIH

Light Intensity High

Aerodrome

LIL

Light Intensity Low

Aerodrome

LIM

Light Intensity Medium

Aerodrome

LIOL

Low Intensity Obstacle Lights

Aerodrome

LIRL

Low Intensity Runway Lights

Aerodrome

LJR

Low Jet Route

Flight planning

LL

Lower Limit

Flight planning

LLN

Low-level Navigation (by the MIL)

Flight planning

LLO

Low Level Operations (by the MIL)

Flight planning

LLZ

Localizer

Instrumentation

LM

Locator (middle) see L and LO

Navigation

LMT

Local mean time

Meteorology

LO

Locator (outer) see L and LM

Navigation

LOC

Locally, Location, Located, Local

Navigation

LOE

Lane of Entry

Flight planning

LONG

Longitude

Measurement

LOSA

Line Operations Safety Audit

Safety

LPT

Liquid Penetrant Test

Airworthiness

LRCS

Long-range communication system

Systems

LRG

Long Range

Navigation

LRI

Line Replaceable Item

Airworthiness

LRNS

Long-range navigation system

Navigation

LSA

Light Sport Aircraft

Aircraft

LSd

CASA’s Legal Services Division

Organisation

LTD

Limited

Measurement

LUL

Lowest Usable Level

Flight planning

LV

Light and Variable (relating to wind)

Meteorology

LVE

Leave, Leaving

Navigation

LVL

Level

Navigation

LYR

Layer, Layered

Meteorology

M

Mach number (followed by figures ie .02 = Mach .02)

Measurement

M (m)

Metres (preceded by figures)

Measurement

M/E

Multi-engine

Aircraft

MAAT

Manual Authoring and Assessment Tool

Publications and charts

MAE

Men and Equipment

Ground Operations

MAG

Magnetic

Navigation

MAHWP

Missed Approach Holding Way-point

Flight operations

MAINT

Maintenance

Airworthiness

MAN

Manual

Manuals and handbooks

MAP

Aeronautical Maps and Charts

Publications and charts

MAP

Manifold Air Pressure

Measurement

MAPT

Missed Approach Point

Navigation

MAR

At Sea

Meteorology

MAUW

Maximum All Up Weight

Flight planning

MAWP

Missed Approach Waypoint

Navigation

MAX

Maximum

Measurement

MBST

Microburst

Meteorology

MBZ

Mandatory Broadcast Zone

Communication

MCC

Multi-crew Co-ordination

Licensing

MCM

Maintenance control manual

Manuals and handbooks

MCQFS

Manual of criteria for the qualification of flight simulators ICAO Doc 9625-AN/938

Manuals and handbooks

MCUR

Mean Cycles Between Unscheduled Removals

Airworthiness

MCW

Modulated Continuous Wave

Communication

MDF

Medium Frequency Direction Finding Station

Instrumentation

MDR

Major Defect Report

Reporting

MEA

Minimum En-route Altitude

Navigation

MED

Medical

Aviation medicine

MEL

Minimum equipment list

Flight operations

MERSITAB

Manufacturing, Engineering and Related Services Industry Training Advisory Body

Organisation

MET

Meteorological, Meteorology

Meteorology

MET

REPORT Aviation routine weather report

Meteorology

METAR

Aviation routine weather report (in aeronautical meteorological code)

Meteorology

METRAD

MET Radar

Meteorology

MF

Medium Frequency (300 to 3000 KHZ)

Communication

MHZ (mhz)

Megahertz

Communication

MIFG

Shallow Fog

Meteorology

MIL

Military

Organisation

MIL-STD

Military Standard

Regulations

MIN

Minutes

Measurement

MIOL

Medium Intensity Obstacle Lights

Flight planning

MIRL

Medium Intensity Runway Lights

Aerodrome

MISC

Miscellaneous

Miscellaneous

MKR

Marker Radio Beacon

Navigation

MLJ

Military Low Jet

Flight planning

MLJR

Military Low Jet Route

Flight planning

MLS

Microwave Landing System

Systems

MLW

Maximum Landing Weight

Measurement

MM

Middle Marker

Navigation

MMEL

Master minimum equipment list

Flight operations

MNM

Minimum

Measurement

MNT

Monitor, Monitoring,

Systems

MNTN

Maintain, Maintained, Maintaining

Safety

MOA

Military Operating Area

Flight planning

MOC

Minimum obstacle clearance (required)

Flight planning

MOD

Moderate

Meteorology

MON

Above Mountains

Meteorology

MOPS

Minimum Operational Performance Standards

Regulations

MOS

Manual of Standards

Regulations

MOU

Memorandum of understanding

Regulations

MOV

Move, Moved, Moving, Movement

Measurement

MOWP

Method of Working Plan

Aerodrome

MPD

Maintenance Planning Data

Airworthiness

MPI

Magnetic Particle Inspection

Airworthiness

MPL

Multi-crew Pilot Licence

Licensing

MPS

Metres per Second

Measurement

MPT

Magnetic Particle Inspection Technician

Airworthiness

MRB

Maintenance Review Board

Organisation

MRBR

Maintenance Review Board Report

Reporting

MRG

Medium Range

Measurement

MRO

Maintenance, repair and overhaul

Airworthiness

MRP

ATS/MET Reporting Point

Reporting

MS

Minus

Measurement

MSA

Minimum sector altitude

Flight planning

MSAS

Multi-function Transport Satellite (MTSAT) Satellite-based Augmentation System

Systems

MSDS

Material Safety Data Sheets

Airworthiness

MSG

Maintenance Steering Group

Organisation

MSG-3

Maintenance Steering Group Logic Process

Publications and charts

MSI

Maintenance Significant Item

Airworthiness

MSL

Mean Sea Level

Measurement

MSSR

Monopulse Secondary Surveillance Radar

Navigation

MT

Mountain

Meteorology

MTBF

Mean Time Between Failure

Airworthiness

MTBR

Mean Time Between Removals

Airworthiness

MTP

Maximum Tyre Pressure

Airworthiness

MTSAT

Multi-function Transport Satellite

Systems

MTTF

Mean Time To Failure

Airworthiness

MTTR

Mean Time To Repair

Airworthiness

MWO

Meteorological Watch Office

Meteorology

MX

Mixed type of ice formation (white and clear)

Meteorology

N

North, North Latitude

Measurement

N1 or NG

Gas Generator Speed

Flight operations

N2

Second Stage Turbine Speed

Flight operations

NAA

National Airworthiness Authority (for a country other than Australia)

Organisation

NAD

Non-acqueous Developer

Airworthiness

NAIPS

National aeronautical information processing system

Systems

NANDTB

National Aerospace Non-destructive Testing Board

Organisation

NANU

Notice Advisory to NavStar Users

Communication

NAP

Noise Abatement Procedures

Safety

NAS

National Airspace System

Systems

NASC

National AIS System Centre

Systems

NAT

NAVAID Training

Training

NAV

Navigation

Navigation

NAVAID

Navigation Aid

Navigation

NAWD

Non-acqueous Wet Developer

Airworthiness

NB

Northbound

Navigation

NBFR

Not Before

Measurement

NC

No Change

Measurement

NDB

Non-directional Radio Beacon

Navigation

NDDN

National Drone Detection Network

NDI

Non-destructive inspection

Airworthiness

NDT

Non-destructive testing

Airworthiness

NE

Northeast

Measurement

NEAT

National Emerging Aviation Technologies

NEG

Negative, No. Permission not granted or, That is not correct

Communication

NFRM

Notice of Final Rule Making

Navigation

NGT

Night

Night operations

NIL

None

Meteorology

NM

Nautical Miles

Measurement

NML

Normal

Miscellaneous

NNE

North North-East

Navigation

NNW

North North-West

Navigation

NOF

International NOTAM Office

Flight planning

NOSIG

No Significant Change

Meteorology

NOTAM

Notice To Airmen

Communication

NOZ

Normal Operating Zone

Navigation

NP

Propeller Speed

Flight operations

NPA

Non-precision approach (procedures at aerodromes)

Navigation

NPC

Notice of proposed change (consultation for amendment to a MOS)

Regulations

NPRM

Notice of proposed rule making

Regulations

NSC

Nil Significant Cloud

Meteorology

NTA

No TAF Amendment

Meteorology

NTL

National

Organisation

NTS

Negative Torque Sensing System

Systems

NTSB

National Transportation Safety Board (of the USA)

Organisation

NTZ

No-transgression zone

Air traffic control

NVD

Night Vision Device

Night operations

NVED

Night Vision Enhancement Devices

Night operations

NVET

National vocational education and training

Systems

NVFR

Night Visual Flight Rules

Regulations

NVG

Night Vision Goggles (by the MIL)

Night operations

NVIS

Night Vision Imaging Systems

Night operations

NW

North-West

Navigation

NXT

Next

Communication

NZ CAA

New Zealand Civil Aviation Authority

Organisation

NZS

New Zealand Standard

Regulations

O/R

On Request

Communication

OAR

Office of Airspace Regulation

Organisation

OAT

Outside Air Temperature

Meteorology

OBPR

Office of Best Practice Regulation

Organisation

OBS

Omni Bearing Selector

Navigation

OBS

Observe, Observed, Observation

Meteorology

OBSC

Obscure, Obscured, Obscuring

Safety

OBST

Obstacle

Safety

OBSTR

Obstruction

Safety

OC

Operating Certificate

Certification

OCA

Oceanic Control Area

Meteorology

OCA

Obstacle Clearing Altitude

Flight planning

OCC

Occulting (light)

Meteorology

OCH

Obstacle Clearance Height

Measurement

OCNL

Occasional, Occasionally

Meteorology

OCTA

Outside Control Area

Navigation

OCTR

Outside Control Zone

Navigation

OEI

One Engine Inoperative

Measurement

OEM

Original Equipment Manufacturer

Airworthiness

OFZ

Obstacle Free Zone

Flight planning

OHD

Overhead

Cabin Safety

OHS

Occupation Health and Safety

Safety

OHSMS

Occupational Health and Safety Management Systems

Safety

OIS

Obstacle Identification Surface

Aerodrome

OLC

Office of Legal Counsel

Organisation

OLDI

On-line Data Interchange

Systems

OLS

Obstacle Limitation Surface

Aerodrome

OM

Operations Manual

Manuals and handbooks

OM

Outer Marker

Navigation

OPA

Opaque, white type of ice formation

Meteorology

OPC

Office of Parliamentary Counsel

Organisation

OPMET

Operational Meteorological

Meteorology

OPN

Operational Notification Message (message type designator)

Communication

OPR

Operator, Operate, Operative, Operating, Operational

Flight operations

OPS

Operations

Ground Operations

OSIP

Overhaul and Special Inspections Periods

Airworthiness

OT

Other Times

Flight planning

OTAC

Overseas Territories Aviation Circulars

Regulations

OTAR

Overseas Territories Aviation Requirements

Regulations

OTLK

Outlook (used in Sigmet messages for volcanic ash and tropical cyclones)

Meteorology

OTP

On Top

Navigation

OUBD

Outboard

Aircraft

OVC

Overcast

Meteorology

OW

Over Water

Flight planning

P..

Prohibited Area (followed by identification)

Flight planning

PA

Precision Approach

Instrumentation

PAL

Pilot Activated Lighting

Aerodrome

PANS

Procedures for Air Navigation Services

Publications and charts

PANS-OPS

Procedures for Air Navigation Services – Aircraft Operations ICAO Doc 8168 Vol I and II

Publications and charts

PAPI

Precision Approach Path Indicator

Instrumentation

PAR

Precision Approach Radar

Systems

PARL

Parallel

Measurement

PATC

Precision Approach Terrain Chart (followed by name/title)

Navigation

PAX

Passengers

Cabin Safety

PBM

Power Plant Build-Up Manual

Manuals and handbooks

PC

Personal Computer

Systems

PCD

Proceed, Proceeding

Flight planning

PCL

Pilot Controlled Lighting

Systems

PCN

Pavement classification number

Aerodrome

PCT

Practical consolidation training

Training

PDC

Pre-Departure Clearance

Air traffic control

PDO

Product distribution organisation

Organisation

PDOP

Positional Dilution of Precision

Navigation

PDSE

Pre-departure Service Check

Airworthiness

PEC

Pressure Error Correction

Measurement

PERM

Permanent

Flight planning

PFC

Porous Friction Course

Airworthiness

PFR

Preferred Route

Communication

PIB

Pre-flight information bulletin

Communication

PIC

Pilot-in-command

Flight crew

PICUS

Pilot-in-Command Under Supervision

Licensing

PIFR

Private IFR rating

Licensing

PILS

Practice ILS

Training

PIREP

Pilot Reports

Reporting

PJE

Parachute Jumping Exercise

Training

PLN

Flight Plan

Flight planning

PLVL