teenus, mille eesmärk on 1) kokkupõrgete vältimine õhusõidukite vahel ning õhusõidukite ja takistuste vahel ning 2) lennuliikluse kiirendamine ja selle korrapärase kulgemise tagamine, a service provided for the purpose of: a) preventing collisions: 1) between aircraft, and 2) on the manoeuvring area between aircraft and obstructions, and b) expediting and maintaining an orderly flo, an integrated system consisting of air traffic control facilities and equipment, communication services, landing and navigation aids, air traffic control standards, rules and regulations, whose object, a service operated by appropriate authority to promote the safe, orderly and expeditious flow of air traffic