Thus, today involves not just legacy cost accounting but also modern challenges like funding for satellite-based surveillance (ADS-B) and CNS/ATM (Communication, Navigation, Surveillance / Air Traffic Management) modernization.
Doc 9811 focuses on implementing specific security requirements during various phases of flight and ground operations. Common topics addressed in such guidance include: icao doc 9811 work
Each chapter translates into a distinct work package for an ANSP or State regulator. Failure to execute any of these work packages is often flagged during ICAO’s Universal Safety Oversight Audit Programme (USOAP) – specifically under economic oversight. Thus, today involves not just legacy cost accounting