atc clearance
1Clearance — A clearance can refer to: in chess, A positional move, where a player moves a piece occupying a certain square away, replacing it with an allied piece that will strengthen the player s position. in engineering and safety, a physical distance or… …
2clearance void times — A pilot may receive a clearance when operating from an airport without a control tower that provides the clearance will be void if the aircraft is not airborne by a specific time. Pilots who do not depart prior to the clearance void time must… …
3“ATC clears” — An expression used to prefix an ATC (air traffic control) clearance when it is relayed to an aircraft by someone other than the air traffic controller who issued the clearance. The expression is also used in direct pilot/controller communications …
4“clearance cancelled...” — An expression used in radio communications to indicate a time specified by an ATC (air traffic control) unit at which a clearance ceases to be valid unless the aircraft concerned has already taken action to comply with it. This expression is used …
5air traffic control clearance — Authorization for an aircraft to proceed under conditions specified by an air traffic control unit (ICAO). This is to prevent collisions between known aircraft. The pilot in command of an aircraft must not deviate from the provisions of VFR… …
6request full-route clearance — A term used by pilots to request that the entire route of a flight be read verbatim in an ATC (air traffic control) clearance. Such requests should be made to preclude receiving an ATC clearance based on the original filed flight plan when a… …
7amended clearance — A clearance issued by air traffic control amending a previous ATC (air traffic control) clearance in response to a request from the pilot or initiated by air traffic control to avoid conflict with other aircraft or severe weather …
8IFR clearance VFR-on-top — An IFR (instrument flight rules) flight plan operating in VFR (visual flight rules) weather conditions may request VFR on top in lieu of an assigned altitude. This clearance permits the pilot to select an altitude or flight level of his or her… …
9short-range clearance — A clearance issued to a departing IFR (instrument flight rules) flight that authorizes an IFR flight to a specific fix short of the destination while ATC (air traffic control) facilities are coordinating and obtaining the complete clearance …
10expect further clearance via — A term used by ATC (air traffic control) to inform a pilot of the routing he or she can expect if any part of the route beyond a short range clearance limit differs from that filed …
