Air Traffic Management

Airspace Management (ASM)

"Airspace Management" is a planning activity aimed at the most efficient use of the airspace. The activities of airspace management include design of:

  • the structure of the airspace (airports zones and areas, sectors and sector configurations for en-route services, proposals for airspace classification etc.);
  • take-off/landing procedures, arrival/departure to/from the airports procedures;
  • the air routes;
  • dynamic management of the airspace structures in the time and the allocation of the airspace between the different categories of users on the basis of their short term needs.

The Head of the Civil Aviation Authority, Ministry of Transport, Information Technology and Communications, determines the airspace structure, the procedures and the air routes’ structure at the suggestion of BULATSA and they are published in the Aeronautical  Information Publication (AIP) of the Republic of Bulgaria.

For the performance of activities that create risks for the civil aviation different airspace structures are defined in which aircraft flights are subject to restrictions. Such structures are prohibited, restricted, dangers, temporary segregated and temporary restricted areas. Considering the fact that large part of these structures is organised for the needs of the military forces, the dynamic airspace structures management is performed in close coordination between the designated by the State ANSP and the competent structures of the Ministry of Defence.

Air Traffic Flows Management

is an activity for the provision of safe, ordered and expedite flow while ensuring maximum use of the available capacity as far as possible and adequacy between the number of the admitted aircraft and the capacity of the sectors/units defined by the units providing air navigation services there. The air traffic flow management is provided centrally for EUROCONTROL Member States by the Operations Centre of the Network Manager and with the assistance of the ATS units. The local conditions in which each ATS unit operates are changing continually, information about the changes is collected centrally and different measures for ensuring continuousness of the flows and avoidance of congestions in certain sectors are implemented. Some of these measures are holding departure, determination of estimated take-off time, redirecting the flows to lightly loaded sectors, limitation of the flight altitude etc.   In addition, information about the expected air traffic load is provided which allows implementation of different sector configurations for efficiently usage of the available resources.