The ICAO should not be confused with the International Air Transport Association ( IATA ), a trade organization for airlines also headquartered in Montreal, or with the Civil Air Navigation Services Organisation ( CANSO ), an organization for Air Navigation Service Providers ( ANSPs ) with its headquarters at Amsterdam Airport Schiphol in the Netherlands.

The ICAO also standardizes certain functions for use in the airline industry, such as the Aeronautical Message Handling System ( AMHS ), making it a standards organization.

The ICAO defines an International Standard Atmosphere ( also known as ICAO Standard Atmosphere ), a model of the standard variation of pressure, temperature, density, and viscosity with altitude in the Earth's atmosphere.

ICAO also provides telephony designators to aircraft operators worldwide, a one-or two-word designator used on the radio, usually, but not always, similar to the aircraft operator name.

ICAO is also responsible for issuing alphanumeric aircraft type codes containing two to four characters.

The NATO phonetic alphabet, more accurately known as the International Radiotelephony Spelling Alphabet and also called the ICAO phonetic or ICAO spelling alphabet, as well as the ITU phonetic alphabet, is the most widely used spelling alphabet.

San Luis Obispo County Regional Airport ( IATA: SBP, ICAO: KSBP, FAA LID: SBP ), also known as McChesney Field, is an airport located in San Luis Obispo, California serving San Luis Obispo County.

* Carbon County Airport, also known as PUC ( IATA code ) and KPUC ( ICAO code )

; LS: ICAO airport code or nationality letters for location indicator ( see also: List of airport codes: LS )

It will also use the letters EDDB, the current code for Berlin Schönefeld Airport, as its ICAO code.

Because of their isolation and difficulty of access, there are no human settlements on these islands, but a detachment of the Chilean Navy is stationed on Isla San Félix, which also hosts a runway ( ICAO code for the airfield: SCFX ).

ICAO codes are also used to identify other aviation facilities such as weather stations, International Flight Service Stations or Area Control Centers, whether or not they are located at airports.

Lalibela is also home to an airport ( ICAO code HALL, IATA LLI ), a large market, two schools and a hospital.

* China Southern Airlines, China, CSN is also their ICAO airline designator

Sibulan Airport ( IATA: DGT, ICAO: RPVD ) also known as Dumaguete Airport.

The airport facilities are also known as Istres-Le Tubé ( ICAO airport code: LFMI ).

* LEAP is also the ICAO code for Empuriabrava Airfield at Girona province in Spain.

The town is also home to an airport ( ICAO code HAGN, IATA GDQ ), and Gondar University which includes Ethiopia's main faculty of medicine.

The airport also attempts to adhere to the air transport standards established by the International Civil Aviation Organization ( ICAO ).

The Convention on International Civil Aviation, also known as the Chicago Convention, established the International Civil Aviation Organization ( ICAO ), a specialized agency of the United Nations charged with coordinating and regulating international air travel.

As more advanced communications methods, such as teleprinter and satellite, took over, the number of such stations diminished, but another type appeared that transmitted spoken and also seemingly random number and letter groups, the latter usually using words from a radio alphabet such as ICAO / NATO alphabet.

Northeim also provides a small grass airfield ( ICAO locator code: EDVN ) due east of the town.

ICAO uses 4-letter airport codes ( vs. IATA's 3-letter codes ).

However, because Alaska, Hawaii and United States territories have their own 2-letter ICAO prefix, the situation there is similar to other smaller countries and the ICAO code of their airports is typically different from its corresponding 3-letter FAA / IATA identifier.

The call sign " Waterski " and the ICAO 3-letter identifier " LOF ," which stands for ' Lodge of the Four Seasons ', are from the early days when the company was operated as Resort Air and took visitors to the Lake of the Ozarks in Missouri.

* Continental Oil, via its ICAO airline designator

* CPD is the ICAO airline designator for Capital Airlines Limited ( Kenya )

* EuroLOT, an airline which has ICAO airline designator ELO

Both ICAO and IATA have their own airport and airline code systems.

* CBE, ICAO code for Aerocaribe, airline based in Cancun, Mexico.

* Condor Flugdienst, ICAO airline designator of airline based in Germany

* CTW, the ICAO airline designator for Cargo Three, Panama

* Tunisair ( ICAO: TAR ), the flag carrier of Tunisia, an airline

* ABR, the ICAO airline designator for Air Contractors, a European freight airline

Show Low Regional Airport ( IATA: SOW, ICAO: KSOW ) provides passenger airline service through Great Lakes Airlines to Phoenix and to Denver through Farmington, New Mexico ; the airport maintains a single passenger terminal for this purpose.

The merged airline uses America West's " CACTUS " callsign and ICAO code " AWE ", but retained the US Airways name because a study found the US Airways name to be more popular than America West Airlines.

* ICAO airline code ACA: Air Canada

* the ICAO airline code for Finnish Commuter Airlines

* Lufthansa Cargo ( ICAO airline code )

Henry Tift Myers Airport ( IATA: TMA, ICAO: KTMA, FAA LID: TMA ) is a public airport located two miles ( 3 km ) southeast of Tifton, serving the general aviation community, with no scheduled commercial airline service.

* FlyLAL Charters, ICAO airline designator of the charter airline

* CSA, the ICAO airline designator for Czech Airlines ( ČSA )

* AAA, ICAO airline code of Ansett Australia, an Australian airline