Chart Navigation & Plotting · Compass — Uncorrecting to Compass
Your true course is 100°. Variation is 12°E and deviation is 4°W. What compass course do you steer?
- A084°
- B108°
- C116°
- D092°✓ Correct
Explanation
Uncorrecting (true to compass): subtract easterly, add westerly. Magnetic = 100° − 12°E (var) = 088°. Compass = 088° + 4°W (dev) = 092°.
Authority: Bowditch (Pub. No. 9), Compass Error
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