Air traffic control

Air traffic control

An in-airport service that facilitates the safe and orderly movement of aircrafts within and between airports, achieved by interpreting data from radar and weather devices, and by maintaining contact with pilots.

Industry: Aviation

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Air traffic control

Height above landing (HAL)

Aviation; Air traffic control

The height above a designated helicopter landing area used for helicopter instrument approach procedures (IAP).

Formation flight

Aviation; Air traffic control

A flight of a number of aircraft that, by prior arrangement among the pilots, normally operate as a single aircraft with regard to navigation and position reports.

Decision height

Aviation; Air traffic control

A specified height in the precision approach or approach with vertical guidance at which a missed approach must be initiated if the required visual reference to continue the approach to land has not ...

Danger area

Aviation; Air traffic control

An airspace of defined dimensions above international waters within which activities dangerous to the flight of non-participating aircraft could take place at specified times.

Eye-to-wheel height

Aviation; Air traffic control

The vertical distance from a pilot's eyes to the lowest portion of the aircraft in the landing attitude. This distance ranges from less than 4 ft up to 45 ft for some wide-bodied aircraft.

Final approach area

Aviation; Air traffic control

The area within which the final approach portion of an instrument approach procedure (IAP) is carried out.

Feathered propeller

Aviation; Air traffic control

A propeller the blades of which have been rotated so that the leading and trailing edges are nearly parallel with the aircraft flight path to stop or minimise drag and engine rotation.