Navigation Problems USCG Question #1734 (Set 52)

Determine the great circle distance and initial course from LAT 25°47.0'N, LONG 79°59.5'W to LAT 38°42.0'N, LONG 09°10.5'W.

Official USCG Answer & Rule Citation

Correct Answer: Option C — 3588.6 miles, 059°T

Utilizing the spherical law of cosines, the distance between the two points is calculated as 3588.6 nautical miles. The initial course angle is derived from the spherical triangle formed by the pole and the two positions, resulting in an initial course of 059°T, consistent with standard great circle navigation procedures.

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