A vessel at LAT 21°32'N, LONG 160°30'W, heads for a destination at LAT 30°00'N, LONG 150°00'E. Determine the true course and distance by Mercator sailing.
Official USCG Answer & Rule Citation
Correct Answer: Option A — 281°T, 2733 miles
Applying standard Mercator sailing algorithms from Bowditch involves calculating meridional parts for initial and final latitudes, establishing the departure triangle, and solving for rhumb line direction and voyage distance.
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