Determine the distance from LAT 59°12'N, LONG 14°00'W to LAT 59°12'N, LONG 03°20'W, by parallel sailing.
Official USCG Answer & Rule Citation
Correct Answer: Option C — 327.7 miles
Parallel sailing formula: Departure = DLo × cos(Lat). The difference in longitude is 10°40' (640'). At 59°12'N, the cosine of the latitude is 0.5120. Multiplying 640 by 0.5120 equals 327.7 miles. This calculation provides the precise distance along the parallel of latitude.
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