Navigation Problems USCG Question #1702 (Set 51)

Determine the distance from LAT 19°54.0'N, LONG 166°36.0'E to LAT 19°54.0'N, LONG 157°54.0'W, by parallel sailing.

Official USCG Answer & Rule Citation

Correct Answer: Option C — 2002.8 miles

Parallel sailing distance is calculated using the formula: Distance = ΔLong × cos(Latitude). The difference in longitude between 166°36.0'E and 157°54.0'W is 35°30' (2130 minutes). Multiplying 2130 by the cosine of 19°54.0' yields 2002.8 miles, representing the distance along the constant latitude parallel.

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