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- Q135 - Navigation Problems: Oceans
441. The great circle distance from LAT 25° 50' N, LONG 77° 00' W to LAT 35° 56' N, LONG 06° 15' W is 3616 miles, and the initial course is 061.7° T. The position of the vertex is LAT 37° 34.9' N, LONG 25° 59.0' W. Determine the latitude intersecting the great circle track 600 miles west of the vertex, along the great circle track.
The latitude of a point 600 nautical miles west of the vertex along the great circle track is calculated using the simplified formula sin L2 = sin L1 * cos d, resulting in a latitude of 36 54.9' N.
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