On 30 July, your 0200 zone time (ZD +4) DR position is LAT 43°48'N, LONG 78°00 W. At that time, you observe Polaris bearing 008.7°psc. The chronometer time of the observation is 05h 58m 07s, and the chronometer is 0m 23s slow. The variation is 10.5°W. What is the deviation of the magnetic compass?

Correct Answer: Option B — 3.0°E

Polaris azimuth is determined using the Nautical Almanac. The True bearing of Polaris is compared to the compass bearing to find the Compass Error. With a variation of 10.5°W, the deviation is found by subtracting the variation from the Compass Error, resulting in 3.0°E.