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Given the following information,determine the crosswind components (XWC), according to Mental Dead Reckoning (MDR)...

Magnetic track: 315°
Wind (magnetic): 015°/20 kt

  • A

    5 kt

  • B

    10 kt

  • C

    15 kt

  • D
    20 kt

Mental Dead Reckoning (MDR) crosswind component:

The XWC can be calculated using a “clock code rule”, where each 15° of wind angle is represented by ¼ of an hour – meaning ¼ the wind strength

Wind angle

15°

30°

45°

60°

% of wind speed

25

50

75

100

(wind angle is the angle between the wind vector and the track/runway direction to the nearest 10°)

  • In this case, the angle between the wind vectpr and the track equals 60°. Therefore, based on the table above, we can conclude that the crosswind component equals 100% of the wind speed ⇒ 20 kt.

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