Air traffic control clearance

Air Traffic Control Clearance
Tags: ICAO, International
Air Traffic Control Clearance is an Aviation Term defined as: Authorisation for an aircraft to proceed under conditions specified by an air traffic control unit (ICAO).

AIR TRAFFIC CONTROL CLEARANCE [ICAO]- Authorization for an aircraft to proceed under conditions specified by an air traffic control unit.

(3) Air traffic control clearances and procedures;
(4) Flight by reference to instruments;
(5) Navigation systems; ...

Pilots of aircraft need to obtain an air traffic control clearance before they enter airspace of classes A or B, while entering classes C or D only requires being in communication with ATC.

See also: Airport, ICAO, Air Traffic Control, Air traffic, Clearance