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

Visibility (VIS)

Aviation; Air traffic control

The distance at which prominent unlighted objects may be identified by day and prominent lighted objects may be identified by night.

Whiteout

Aviation; Air traffic control

An atmospheric optical phenomenon of snow-covered regions in which the observer appears to be engulfed in a uniformly white glow. Shadows, the horizon, and clouds are not discernible; depth ...

Unable

Aviation; Air traffic control

An expression that indicates inability to comply with a specific instruction, request or clearance.

When ready

Aviation; Air traffic control

Canada: When used in conjunction with an altitude clearance, means that ATC has offered the pilot the option of commencing the altitude change whenever the pilot wishes. When the change is initiated, ...

Verify your altitude

Aviation; Air traffic control

An expression used by ATC to validate the altitude readouts from the aircraft's encoding transponder.

Uncontrolled aerodrome

Aviation; Air traffic control

An aerodrome at which a control tower has not been established. This designation also applies during the non-operational period when an established control tower is on reduced hours (part time).

Vertical takeoff and landing aircraft

Aviation; Air traffic control

An aircraft capable of vertical climbs and descents and of using very short runways or small areas for takeoff and landing. These aircraft include, but are not limited to, helicopters.