Communications

ATC Clearance

Definition

An authorization by ATC for an aircraft to proceed under specified conditions. Clearances include IFR route clearances, takeoff and landing clearances, and altitude assignments. Pilots must read back clearances.

Related Terms

Air Traffic Control(ATC)

A service provided by ground-based controllers directing aircraft movement in co...

Readback

The pilot repetition of an ATC clearance or instruction to confirm correct recep...

Squawk Code

A four-digit octal code set on the aircraft transponder for ATC identification. ...

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