You are steering a magnetic compass course of 075°. The variation for the area is 10°W, and the compass deviation is 5°E. What is the true course you are steering?

Correct Answer: Option C — 070°T

Apply the rule 'Compass Best, Deviation West' (or 'Compass Least, Deviation East'). With a magnetic compass course of 075° and 5°E deviation, the magnetic heading is 080°M. Applying 10°W variation (subtracting 10° from 080°) results in a true course of 070°T.