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Acronyms

Below is a list of acronyms related to air transport commonly found in documents and text featured on this site:

ACSA

Central American Agency for Aviation and Safety

ADS-BAutomatic Dependendent Surveillance - Broadcast
AFCACAfrican Civil Aviation Commission
AGLAbove Ground Level
AIRACAeronautical Information Regulation And Control
AISAeronautical Information Services

ATAG

Air Transport Action Group

ATC

Air Traffic Control

ATM

Air Traffic Management

ATSAir Traffic Services

AVSEC

Aviation Security

CAACivil Aviation Authority

CARs

Civil Aviation Regulations

CASA

Civil Aviation Safety Authority (Australia)

CATCategory (instrument approach category, country safety category, etc.)
CNSCommunications, Navigation, and Surveillance

COCESNA

Central American Corporation for Air Navigation Services

COMCommunications (e.g. communications radio)

COSCAP

Cooperative Development of Operational Safety and Continuing Airworthiness Programme

DMEDistance Measuring Equipment
DTGDate-Time Group
ELEVElevation

FAA

Federal Aviation Administration

FIRFlight Information Region
FISFlight Information Service
FISAAutomatic Flight Information Service
FLFlight Level (usually altitudes over 18,000 feet)
FSSFlight Service Station

GPS

Global Positioning System

HDFHigh Frequency Direction Finding Station

IASA

International Aviation Safety Assessment Program (FAA)

IATA

International Air Transport Association

ICAO

International Civil Aviation Organization

IFFAS

International Financial Facility for Aviation Safety (ICAO)

IFR

Instrument Flight Rules

ILSInstrument Landing System
IMCInstrument Meteorological Conditions

IOSA

Operational Safety Audit of IATA

ISAInternational Standard Atmosphere
KTKnots (nautical miles per hour, versus standard miles per hour)

LAAS

Local Area Augmented navigation System

LACAC

Latin American Civil Aviation Commission

MAK

Interstate Aviation Committee

MCARS

Model Civil Aviation Regulations

MDAMinimum Descend Altitude
MEAMinimum En-Route Altitude
METARAviation Routine Weather Report
MLSMicrowave Landing System

MOT

Ministry Of Transportation

MSA

Management Services Agreement

MTCAT

Ministry of Transportation, Civil Aviation, and Tourism

MWOMeteorological Watch Office

NAAT

North-American Aviation Trilateral

NAVNavigation (e.g. Navigation equipment)
NDBNon-Directional Radio Beacon (used for navigation)
NMNautical Mile(s) (one minute arc length of a great circle, internationally set at 1.1502 standard miles, or 1,852 meters)
OCAObstacle Clearance Altitude, OR Oceanic Control Area

PASO

Pacific Aviation Safety Office

RASOS

Regional Safety Oversight System

RNAVArea Navigation

RSCOCS

Regional Safety Oversight Cooperation System

RSOO

Regional Safety Oversight Organizations

RSREn-Route Surveillance Radar
RWYRunway
SARSearch And Rescue

SARPs

Standards And Recommended Practices (ICAO)

SMCSurface Movement Control
SMRSurface Movement Radar
SRASurveillance Radar Approach
STARStandard Instrument Arrival

TCB

Technical Cooperation Bureau (ICAO)

TMATerminal Control Area
TRATemporarily Reserved Airspace
TWRAerodrome Control Tower or simply Aerodrome Control if there is no tower
UACUpper Area Control Center
UARUpper Air Route
UDFUltra-high frequency Direction Finding station
UHFUltra High Frequency (300 - 3000 MHz)
UIRUpper flight Information Region
UTAUpper control Area
UTCUniversal Time Coordinated (formerly Greenwich Mean Time, or GMT)

USAP

Universal Security Audit Programme (ICAO)

USOAP

Universal Safety Oversight Audit Programme (ICAO)

VDFVery high frequency Direction Finding station

VFR

Visual Flight Rules

VHFVery High Frequency (30 - 300 MHz)
VLFVery Low Frequency (3 - 30 kHz)
VLRVery Long Range
VMCVisual Meteorological Conditions
VORVHF Omni-directional Radio range (used for navigation)
VTOLVertical Take-Off and Landing

WAAS

Wide Area Augmented navigation System

WMO

World Meteorological Organization




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