Chart Navigation & Plotting · Compass & Course
True course 090°, variation 10°W, deviation 4°E. What is the compass course?
- A084°
- B090°
- C096°✓ Correct
- D104°
Explanation
Apply TVMDC adding west: True 090 + Var 10W = Magnetic 100; Magnetic 100 − Dev 4E (east is subtracted) = Compass 096°. The net of 10°W and 4°E is 6°W, added to 090 gives 096°.
Authority: Bowditch, Pub. No. 9 (TVMDC)
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