Your vessel is proceeding up a channel, and you see a pair of range lights that are in line ahead. The chart indicates that the direction of this pair of lights is 352°T, and the variation is 4°W. If the heading of your vessel at the time of the sighting is 359° per standard magnetic compass, what is the correct deviation?

Correct Answer: Option C — 3°W

The range lights provide a true bearing of 352°. With a variation of 4°W, the magnetic bearing is 356°. The vessel's heading is 359° per standard magnetic compass. The difference between the magnetic bearing and the compass heading reveals the deviation, calculated as 3°W to align the compass with the magnetic meridian.