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USCG Exam PracticePlotting with variation and deviation (T-V-M-D-C)

A vessel steers compass course 270°C. Deviation is 5°W and variation is 8°E. What is the true course?

  1. ✓ 273°TCorrect
  2. B. 257°T
  3. C. 283°T
  4. D. 267°T

Why A is correct

Correcting from compass to true, add easterly errors and subtract westerly errors. 270°C − 5°W deviation = 265° magnetic; 265° + 8°E variation = 273°T.

Cited:Bowditch Ch. 6 §602

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A vessel steers compass course 270°C. Deviation is 5°W and variatio… — USCG Exam Practice · CaptainsGround