Aviation

Aviation

Dealing with vehicles or machines used in flight or propulsion through the air.

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Aviation > Airport

non-standard formation

Aviation; Air traffic control

A formation flight for which, through prior arrangement with ATC, the flight leader has received approval for formation dimensions other than standard ones.

severe turbulence

Aviation; Air traffic control

Turbulence that causes large, abrupt changes in altitude or attitude. It usually causes large variations in indicated airspeed (IAS). Aircraft may be momentarily out of control.

primary frequency

Aviation; Air traffic control

The radiotelephony frequency assigned to an aircraft as a first choice for air-ground communication in a radiotelephony network.

required navigation performance type

Aviation; Air traffic control

A containment value expressed as a distance in nautical miles from the intended position within which flights would be for at least 95 percent of the total flying time. For ...

super high frequency (SHF)

Aviation; Air traffic control

The frequency band between 3 and 30 GHz.

terminal control unit (TCU)

Aviation; Air traffic control

An ATC unit that provides ATC service to aircraft operating within or in the vicinity of a terminal control area (TCA).

track

Aviation; Air traffic control

The projection on the earth's surface of the path of an aircraft, the direction of which path at any point is usually expressed in degrees from true, magnetic or grid north.