- Authorization issued by air traffic control to the pilot of an aircraft for landing under instrument flight rules. The type of instrument approach procedure (IAP), along with other pertinent information, is provided in the approach clearance when required.
Aviation dictionary. 2014.
Look at other dictionaries:
approach clearance — Authorization for a pilot conducting flight in accordance with instrument flight rules to commence an approach to an airport … Military dictionary
expected approach clearance — An expression used in radio communications to indicate the time at which arriving aircraft should be cleared to begin the approach for a landing. Also known as EAT, or expected approach time … Aviation dictionary
expect approach clearance at . . — An expression used in radio communications to indicate the time at which it is expected that an aircraft will be cleared to commence the approach for a landing … Aviation dictionary
expected approach clearance time — The time at which it is expected that an aircraft will be cleared to commence approach for a landing … Aviation dictionary
approach sequence — The order in which two or more aircraft are cleared to approach to land at the aerodrome (ICAO). The aircraft are accordingly positioned while on approach or while awaiting approach clearance … Aviation dictionary
Approach lighting system — The approach lighting system of Bremen Airport An approach lighting system, or ALS, is a lighting system installed on the approach end of an airport runway and consisting of a series of lightbars, strobe lights, or a combination of the two that… … Wikipedia
Instrument approach — Terminal procedures for an ILS approach in the United States. (The disclaimers shown in red in the illustration do not appear on the original approach plate.) For aircraft operating under instrument flight rules (IFR), an instrument approach or… … Wikipedia
expected approach time — The time at which it is expected that an arriving aircraft will be cleared to commence approach for a landing (ICAO). It is the time at which an aircraft, following a delay, will leave the holding point to complete its approach for a landing. The … Aviation dictionary
estimated approach time — The time at which ATC (air traffic control) expects that an arriving aircraft following a delay will leave the holding point to complete the approach for a landing. The actual time of leaving the holding point will depend upon the approach… … Aviation dictionary
obstacle-clearance altitude (OCA)/obstacle-clearance height — The lowest altitude or height above the elevation of the relevant runway threshold or the airport elevation as applicable, used in compliance with appropriate obstacle clearance criteria. Obstacle clearance altitude is referenced to mean sea… … Aviation dictionary