A specially prepared or selected part of an aerodrome within which aircraft may be parked.

A defined path on a land aerodrome established for the taxiing of aircraft and intended to provide a link between one part of the aerodrome and another.

A location on the maneuvering area of an aerodrome at which an aircraft carries out an engine run-up or is held before entering a runway for take-off.

The beginning of that portion of the runway usable for landing.

A volume of air space in the immediate vicinity of a precision approach runways defined by the inner approach, inner transitional and balked landing surfaces, which must be kept free from fixed objects.

A specified portion of a horizontal plane beyond the limit of the conical surface that defines the volume of upwards air space that should be kept free from obstacles to facilitate instrument approach procedures.

A surface sloping up outwards from the periphery of the inner horizontal surface that defines the volume of upwards air space that should be kept free from obstacles to protect aircraft for visual circling prior to landing.

A horizontal surface around a runway strip above an aerodrome and its vicinity that defines the volume of upwards air space that should be kept free from obstacles to protect aircraft for visual circling prior to landing.

A surface around a runway strip sloping up outwards to the inner horizontal surface that defines the volume of upwards air space that should be kept free from obstacles to protect aircraft in their final phase of approach.

A surface sloping up outwards located beyond the end of the TORA or clearway that defines the volume of upwards airspace that should be kept free from obstacles to protect aircraft on take-off.