You are on course 251°pgc and 241° per magnetic compass, when you observe a range in line bearing 192°pgc. The chart indicates that the range is in line on a bearing of 194°T. The variation is 16°E. What is the deviation of the magnetic compass?

Correct Answer: Option B — 4°W

Determining compass deviation requires reconciling gyro, true, magnetic, and compass headings using standard TVMDC principles. The charted range true bearing of 194°T and 16°E variation establish magnetic, which compared against the 241° magnetic heading yields a 4°W deviation.