Compass deviation is caused by what, and corrected using what?

Choices

• ✓ Magnetic fields within the airplane, corrected with the compass correction cardcorrect

  Deviation arises from the aircraft’s own magnetic fields and is corrected via the correction card.

• The earth’s magnetic field, corrected with isogonic lines

  That describes variation, not deviation.

• Crosswind, corrected with a wind correction angle

  Crosswind is a wind issue, not a compass deviation.

• Turning error, corrected by leveling the wings

  Turning error is a separate compass error, not deviation.