A vessel at LAT 49°45'N, LONG 6°35'W, heads for a destination at LAT 25°50'N, LONG 77°00'W. Determine the true course and distance by Mercator sailing.
Official USCG Answer & Rule Citation
Correct Answer: Option D — 246.5°T, 3597 miles
Mercator sailing formulas integrate meridional differences to find the constant rhumb line course between two positions. Calculations based on Bowditch standards yield a course of 246.5°T and a rhumb line distance of 3597 miles.
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