Doc 9994, Manual on Airborne Surveillance Applications Second Edition, 2020.
Airborne surveillance is rapidly evolving with a number of new capabilities planned for introduction into the flight deck. The ICAO Global Air Navigation Plan (GANP) (Doc 9750) requires that these be interoperable in order to allow aircraft to achieve the same levels of safety and efficiency globally. Airborne surveillance represents a shift in surveillance functionality from traditional ground-based sensors to a comprehensive suite of avionics which will support a range of new, demanding surveillance capabilities and applications. Aircraft position and other airborne parameters are/will be provided by the basic airborne surveillance capability, known as ADS-B OUT. This information is/will be used directly by other aircraft equipped with an advanced capability, known as ADS-B IN, to support both existing applications, and some yet to be developed.
This manual describes several airborne surveillance capabilities such as Basic Airborne Situational Awareness (AIRB), visual separation on approach (VSA), Basic Surface Situational Awareness (SURF) and ADS-B traffic awareness system (ATAS). It also describes the in-trail procedure (ITP) application and the interval management (IM) application, which were introduced in the Aviation System Block Upgrades (ASBUs) supporting GANP.