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6.14 Principles and Terminology

6.14.2 Define:

(a) true and magnetic track required;

The path that an aircraft is intended to follow over the ground as represented by a line joining the departure point with the destination on a map relative to True North or Magnetic North.


(b) wind velocity (W/V);

The speed and direction of a wind.

Expressed as a four, five or six-figure group;

  • the first three figures are the direction from which the wind blows, and
  • the last one, two or three figures indicate the speed of the wind.

Depending on where it is written, the direction and speed figures are either all together or separated with a forward slash.


A wind of 30 kts blowing from the South would be a wind velocity of

  • 180/30KT, or
  • 18030KT.

A wind of 8 kts blowing from the West would be a wind velocity of

  • 270/08KT, or
  • 27008KT. or
  • 270/8KT.

A wind of 110 kts blowing from the North would be a wind velocity of

  • 360/110KT, or
  • 360110KT.


Wind direction in an ATIS or given by ATC is in degrees magnetic.

Wind direction in a METAR, TAF, or GRAFOR is in degrees True.


(c) head/tail wind;

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