INFO Last updated  on  30 JUN 2022                                                               PDF Version - Printable

GEN 2.2  ABBREVIATIONS  USED  IN  AIS  PUBLICATIONS

A

A/A

Air-to-air

AAD

Assigned altitude deviation

AAIM

Aircraft autonomous integrity  monitoring 

AAL

Above aerodrome level

AASL*

Airport & Aviation Services  (Sri Lanka  ) (Private) Limited

ABI

Advance boundary information

ABM

Abeam

ABN

Aerodrome beacon

ABT

About

ABV

Above

AC

Altocumulus

ACARS

Aircraft communication addressing and reporting system

ACAS

Airborne collision avoidance system

ACC

Area control centre or area control

ACCID

Notification of an aircraft accident

ACFT

Aircraft

ACK

Acknowledge

ACL

Altimeter check location

ACN

Aircraft classification number

ACP

Acceptance (message type   designator)

ACPT

Accept or accepted

ACT

Active or activated or activity

AD

Aerodrome

ADA

Advisory area

ADC

Aerodrome Chart

ADDN

Addition or additional

ADF

Automatic direction-finding   equipment

ADS-B

Automatic Dependent Surveillance-B

ADS-C

Automatic Dependent Surveillance-C

ADVS

Advisory service

ADZ

Advise

AES

Aircraft earth station

AFIL

Flight plan filed in the air

AFIS

Aerodrome flight information service

AFS

Aeronautical fixed service

AFT

After...(time or place)

AFTN

Aeronautical fixed telecommunication network

A/G

Air-to-ground

AGA

Aerodromes, air routes and ground aids

AGL

Above ground level

AGN

Again

AIC

Aeronautical  information circular

AIDC

Air traffic services interfacility data communications

AIP

Aeronautical Information Publication

AIRAC

Aeronautical Information regulation and control

AIREP

Air report

AIRMET   

Information concerning en-route weather phenomena which may affect the safety low -level aircraft operations   

AIS

Aeronautical  information services

ALA

Alighting area

ALERFA

Alert phase

ALR

Alerting (message type designator)

ALRS

Alerting service

ALS

Approach lighting system

ALT

Altitude

ALTN

Alternate or alternating (light alternates in colour)

ALTN

Alternate (aerodrome)

AMA

Area minimum altitude

AMD

Amend or amended

AMDT

Amendment (AIP Amendment)

AMS

Aeronautical mobile service

AMSL

Above mean sea level

AMSS

Aeronautical mobile satellite service

ANC

Aeronautical chart-1:500 000 (followed by name /title)

ANCS

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

ANS

Answer

ANSP*

Air Navigation Service Provider

ANSD*

Air navigation  services division

AOC

Aerodrome obstacle chart (followed by type and name/title)

AP

Airport

APAPI

Abbreviated  precision approach path indicator

APCH

Approach

APDC

Aircraft parking/docking chart (followed by name/title)

APN

Apron

APP

Approach control officer or approach control or approach control service

APR

April

APRX

Approximate or approximately

APSG

After passing

APV

Approve or approved or approval

ARC

Area chart

ARNG

Arrange

ARO

Air traffic services reporting office

ARP

Aerodrome reference point

ARP

Air-report (message type designator)

ARQ

Automatic error correction

ARR

Arrive or arrival

ARR

Arrival (message type designator)

ARS

Special air-report (message type designator)

ARST

Arresting [ specify (part of) aircraft arresting  equipment]

AS

Altostratus

ASC

Ascend to or ascending to

ASDA

Accelerate-stop distance available

ASE

Altimetry system error

ASPEEDG

Airspeed gain

ASPEEDL

Airspeed loss

ASPH

Asphalt

ASTO*

Aeroshell turbine oil

ATA

Actual time of arrival

ATC

Air traffic control (in general)

ATD

Actual time of departure

ATFM

Air traffic flow management

ATFMU

Air traffic flow management unit

ATIS

Automatic terminal information service

ATM

 Air traffic management

ATN

Aeronautical telecommunication  Network

ATP

At...(time or place)

ATS

Air traffic services

ATTN

Attention

AT-VASIS

Abbreviated T visual approach slope indicator system

ATZ

Aerodrome traffic zone

AUG

August

AUTH

Authorized or authorization

AUW

All up weight

AUX

Auxiliary

AVBL

Available or Availability

AVG

Average

AVGAS

Aviation gasoline

AWOS*

Automated  weather observation system

AWTA

Advise at what time able

AWY

Airway

AZM

Azimuth

B

B

Blue

BA

Braking action

BARO-VNAV

Barometric vertical navigation

BASE

Cloud base

BCFG

Fog patches

BCN

Beacon

BCST

Broadcast

BDRY

Boundary

BECMG

Becoming

BFR

Before

BIAC*

Bandaranaike international airport Colombo

BKN

Broken

BLDG

Building

BLO

Below clouds

BLW

Below

BOMB

Bombing

BOBCAT

Bay of Bengal  cooperative ATFM system

BR

Mist

BRG

Bearing

BRKG

Braking

BTL

Between layers

BTN

Between

C

...C

Centre  (preceded by runway designation number to identify a parallel runway)    

C

Degrees Celsius (Centigrade)

CAT

Category  or Clear air turbulence

CAASL*

Civil Aviation Authority of Sri Lanka

CAVOK

Visibility, cloud and present weather better than prescribed values or conditions

CB

Cumulonimbus

CC

Cirrocumulus

CD

Candela

CDN

Coordination (message type designator)

CF

Change frequency to..

CFM

Confirm or I confirm

CGL

Circling guidance light(s)

CH

Channel

CHG

Modification (message type designator)

CI

Cirrus

*CIAR

Colombo Internationa Airport Ratmalana

CIDIN