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For a short flight from A to B the pilot extracts the following information from an aeronautical chart:

True course: 245°
Magnetic variation: 7°W

The magnetic course (MC) equals to...

  • A

    252°.

  • B

    245°.

  • C

    007°.

  • D

    238°.

Track or Course is the aircraft's path over the ground. If the course is measured with referenced to the True North, it is called True Course, whilst if measured with reference to the Magnetic North then it is called Magnetic Course.

Magnetic Variation is the difference between True North and Magnetic North.

Using this mnemonic, calculate the Magnetic Course:

  • Variation West, magnetic "Best" (or greater than true).
  • Variation East, magnetic "Least" (or less than true).
True Course (TC)

Magnetic

Variation

Magnetic Course (MC)

245°
(245° + 7°W)
Variation West, Magnetic Best		7°W252°

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