The Controlled and Harmonised Aeronautical Information Network (abbreviated: ''CHAIN'') is a concept developed by

EUROCONTROL The European Organisation for the Safety of Air Navigation, commonly known as Eurocontrol (stylised ''EUROCONTROL''), is an international organisation working to achieve safe and seamless air traffic management across Europe. Founded in 1960, Eu ...

to improve the quality, integrity, accuracy and

interoperability Interoperability is a characteristic of a product or system to work with other products or systems. While the term was initially defined for information technology or systems engineering services to allow for information exchange, a broader def ...

of aeronautical data in kind of a digital data chain avoiding changes in medium in the whole data process. Using CHAIN regulators of aeronautical information as well as service providers (ANSPs) can be supported implementing and maintaining traceable, controlled and auditable processes in compliance with

ICAO 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 ...

Annex 15 requirements for data quality with a focus on data integrity. The scope of CHAIN covers flight critical and essential navigational aeronautical data (e.g. a runway threshold coordinates and heights) as established in ICAO Annex 15, supplemented by the industry standards

EUROCAE The European Organisation for Civil Aviation Equipment (EUROCAE) deals exclusively with aviation standardisation, for both airborne and ground systems and equipment. It was created in 1963 in Lucerne, Switzerland by a decision of the European Ci ...

ED-76 and ED-77.

External links

CHAIN - Data Integrity
Air traffic control in Europe Aviation safety