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

Discrete frequency

Aviation; Air traffic control

A separate radio frequency for use in direct communications that reduces frequency congestion by controlling the number of users on a particular frequency at one time.

Military terminal control unit (MTCU)

Aviation; Air traffic control

A system of control by surveillance and precision radar, consolidated into one specific military unit to provide radar traffic control service to IFR flights operating within a designated terminal ...

Emergency frequency

Aviation; Air traffic control

A frequency (for example 121.5 MHz) used for transmitting emergency information.

Mean wind

Aviation; Air traffic control

The wind direction and speed as determined from a sample reading taken every second over a two-minute period.

Guard

Aviation; Air traffic control

DND: An expression used in radiocommunications to indicate emergency frequency 243.0 MHz. Note: An example would be "Monitor guard."

Hover cheque

Aviation; Air traffic control

An expression used to describe the situation when a helicopter or vertical takeoff and landing aircraft (VTOL) requires a stabilised hover to conduct a performance or power cheque prior to hover ...

Mandatory frequency (MF)

Aviation; Air traffic control

A very high frequency (VHF) specified in the Canada Air Pilot (CAP) or the Canada Flight Supplement (CFS) for the use of radio-equipped aircraft operating within a mandatory frequency area.