This document provides a high level overview of the operational concept of the Aircraft Identification (ACID) Programme, a Pan European cooperative programme to implement the ANSB strategy concerning aircraft identification, and achieve an initial operational capability by February 2012.

This Operations Manual, which has been developed from previous guidance material, presents essential operational information for the operational introduction of Mode S Elementary Surveillance.

This document replaces the EUROCONTROL document "Guidance for the Operational Introduction of SSR Mode-S, Volume 1, Elementary Surveillance".

This document is aimed mainly at flight crews and aircraft operations staff and it outlines basic rules for the completion of flight plans and the operation of Mode S transponders.

Mode S CONOPS specifies the employment criteria for the operational use of Secondary Surveillance Radar (SSR) following the introduction of a Mode S surveillance capability. It provides detailed information concerning the operational elements involved; the requirements of the users, airborne equipment functionality and the measures needed to ensure continued safe and efficient Air Traffic Management (ATM) in a mixed Mode S and non-Mode S secondary radar environment.

This brochure describes transponder operating procedures from departure gate to runway line-up, and landing to gate.