You swung ship and compared the magnetic compass against the gyro compass to find deviation. Gyro error is 2°E. The variation is 8°W. Find the deviation on a magnetic compass heading of 104°.

Correct Answer: Option C — 2.2°W

Apply the standard compass error formula: Compass + Deviation = Magnetic; Magnetic + Variation = True. Given the gyro error of 2°E and variation of 8°W, the deviation is calculated by reconciling the magnetic compass heading against the known true reference, yielding a value of 2.2°W.