In aviation, an Aeronautical Information Publication (or AIP) is defined by the International Civil Aviation Organization as a publication issued by or with the authority of a state and containing aeronautical information of a lasting character essential to air navigation.
[not verified in body] It is designed to be a manual containing thorough details of regulations, procedures and other information pertinent to flying aircraft in the particular country to which it relates.
AIPs normally have three parts – GEN (general), ENR (en route) and AD (aerodromes).
These changes are received well in advance so that users of the aeronautical data can update their flight management systems (FMS).
The external links section below lists AIPs which aim to follow the EUROCONTROL eAIP Specification.