What is magnetic variation?

Choices

• ✓ The angular difference between true north and magnetic north at a locationcorrect

  Variation is the true-versus-magnetic angular difference, shown by isogonic lines.

• Compass error caused by metal in the airplane

  That describes deviation, not variation.

• The wind correction angle for a leg

  The wind correction angle is a wind, not magnetic, adjustment.

• The change in altimeter setting with distance

  That is unrelated to magnetic variation.