Air traffic control

Air traffic control is a set of services rendered by air traffic controllers to aircraft to assist in the safe, fast and efficient flight. The services are three, called "air navigation services, for the purposes of: prevent collisions between aircraft and ground vehicles or on the one hand, and midair collisions between aircraft on the other hand (formerly known as "collisions"). It is also to accelerate and direct air traffic; to provide advice and information necessary for safe and efficient performance of the flight: weather information, information on the status of ground facilities for navigation, traffic information (when the service will not be ensured in this area ); to provide a warning to prevent its appropriate when aircraft need the assistance of relief organizations and rescue and to lend to these bodies the necessary assistance.