Approach clearance

An approach clearance is an ATC clearance that authorizes an aircraft to fly a specified approach procedure, such as an ILS, RNAV, VOR, or visual approach. It is normally issued when the aircraft is established for the approach or when ATC can fit it safely into traffic. The clearance may include runway, type of approach, altitude restrictions, or other conditions, and these must be read back exactly. After receiving it, the pilot flies the cleared approach and continues to comply with any remaining speed, altitude, or communication instructions.