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Wind provided by ATC is measured as follows…

  • A

    Surface wind referenced to True North.

  • B

    Wind at 500 ft referenced to True North.

  • C

    Surface wind referenced to Magnetic North.

  • D

    Wind at 500 ft referenced to Magnetic North.

Learning Objectives 050.02.01.01.02: State the units of wind directions (degrees true in reports; degrees magnetic from tower) and speed (kt, m/s).

Aviation wind direction uses a scale from 001° to 360°, stated in degrees relative to a north datum to indicate the direction from which the wind blows. As a general rule assume that the wind direction is relative to True North, unless it is a wind report issue by an Aerodrome Air Traffic Control Unit or from the Automatic Terminal Information Service (ATIS) broadcast.

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