The Common ICAO Data Interchange Network (CIDIN) is a network, run by the

International Civil Aviation Organization The International Civil Aviation Organization (ICAO, ) is a specialized agency of the United Nations that coordinates the principles and techniques of international air navigation, and fosters the planning and development of international ...

(ICAO), which makes up part of the

aeronautical fixed service The aeronautical fixed service (AFS) is a telecommunication service between specified fixed points provided primarily for the safety of air navigation and for the regular, efficient and economical operation of air services. ("Air service" means any ...

. It is used to transmit text or binary messages for the purposes of

air traffic control Air traffic control (ATC) is a service provided by ground-based air traffic controllers who direct aircraft on the ground and through a given section of controlled airspace, and can provide advisory services to aircraft in non-controlled airsp ...

.Agenda of the ICAO Aeronautical Telecommunications Panel meeting in Montreal, 7-18 February 2000
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References

Aviation communications {{Compu-network-stub