Determine the great circle distance and initial course from LAT 12°45.2'N, LONG 124°20.1'E to LAT 33°48.8'N, LONG 120°07.0'W.
Official USCG Answer & Rule Citation
Correct Answer: Option C — 6185.9 miles, 050.3°T
Spherical trigonometry and great circle sailing equations resolve the initial course angle and shortest distance between departure and arrival coordinates. Calculating vertex positions and side angles across the Pacific basin confirms a distance of 6185.9 miles and initial true course of 050.3°T.
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