Navigation General · TVMDC Conversion
Variation: 10° E, Deviation: 5° W. A compass course of 085° converts to what true course?
- A070°
- B080°
- C090°✓ Correct
- D100°
Explanation
Converting compass to true (correcting): add East errors, subtract West errors. Apply deviation first: 085° − 5°W = 080° Magnetic. Then apply variation: 080° + 10°E = 090° True. Answer: 090°T.
Authority: Bowditch (Pub. 9)
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