On 3 October your 2122 ZT position is LAT 26°32'N, LONG 84°26'W. You observe Polaris bearing 359.8°pgc. At the time of the observation the helmsman noted that he was heading 106°pgc and 107°psc. The variation is 0°. What is the deviation for that heading?

Correct Answer: Option D — 0°

Applying Bowditch celestial principles, true bearing is determined by correcting gyro bearing for gyro error. With variation at 0°, magnetic heading equals true heading. Comparing magnetic heading to standard compass heading confirms zero deviation, making 0° the correct solution per standard compass calibration methods.