Air Navigation Services
In response to requests from States for guidance aimed at improving the efficiency and cost-effectiveness of air navigation services ICAO developed the Manual on Air Navigation Services Economics (Doc 9161). The purpose of this manual is to provide practical guidance material to assist those responsible for air navigation services management in improving the efficiency and cost-effectiveness of the services and so assist in the sustainable development of air navigation infrastructure. It is based on the international policies and principles on air navigation services cost recovery that States have developed through ICAO and it describes procedures and practices that are in conformity with them.
The latest edition is available from the ICAO Publications website under "Doc Series".