Paris Cedex 15
50, Rue Henri Farman,
Tel +33 1 5809 43 79
Fax +33 1 5809 35 35www.dgac.fr
The DSNA brings together more than 6,000 people in the operational, technical and administrative bodies that contribute to the realization of air navigation services. The DSNA is composed of a central management level and two main directions:
Royalties paid by airlines cover the costs of air traffic control. The investment credits allocated to air navigation on the civil aviation subsidiary budget, make it possible to cope with the continuation of major equipment programs.
In terms of investment, the focus has been on computer systems and more specifically the development of a new generation of flight plan processing system (eFDP) in cooperation with the Italian Civil Aviation and the launch of a program to set up 17 Mode S secondary radars that will eventually enable data exchange between the on-board and ground systems.
The priority is maintaining the level of safety and increasing the capacity of the air navigation system, while devoting a significant budget to the research and development of new tools.
The objective of air navigation services is to get a maximum of airplanes while maintaining optimal safety conditions.
The airport control tower is the best-known link in the air traffic control chain that keeps every aircraft under surveillance, from installation in the cabin to landing passengers.
Indeed, if the sky is large, the safety of all requires that each aircraft follows a determined and marked route, the "air corridor", respecting the horizontal and vertical separations which serve to protect the aircraft from any risk of collision or aerodynamic disturbance. Invisible, the role of the "controllers of the sky" is none the less fundamental:
Civilian transport planes are not alone in the sky and, above all, they can not go wherever they want.
The controllers must have a set of reserved areas, including the so-called "Charlie" zones, for training military aircraft.
This situation requires a very precise sharing of airspace and permanent coordination in real time.
This explains the presence of military controllers in air navigation centers and, conversely, their civilian counterparts in military centers.
The consultation between civilians and soldiers led to the creation, in February 1999, of the "National Cell of Airspace Management" (CNGE). This unit manages the activity of all the temporary segregated military zones as well as the opening of the conditional air routes.
These routes allow civilian aircraft to cross unused military training areas to shorten routes. A program will culminate in 2004 in an automated coordination between civilian and military controllers.