Chart Navigation & Plotting · Compass — Correcting to True
You steer a compass course of 130°. Compass error is 6°W. What is your true course?
- A142°T
- B136°T
- C118°T
- D124°T✓ Correct
Explanation
When correcting (compass to true), westerly error is subtracted: 130° − 6°W = 124°T. (Easterly error would be added — 'Correcting add east.')
Authority: Bowditch (Pub. No. 9), Compass Error
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