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- Q157 - Navigation Problems: Oceans
178. Determine the great circle distance and initial course from LAT 25° 50.0' N, LONG 77° 00.0' W to LAT 35° 56.0' N, LONG 06° 15.0' W.
The great-circle distance between the two locations is 3616 nautical miles, and the initial course is 062T. This is determined by applying the spherical law of cosines to calculate the central angle, then converting that angle to distance, and finally using the great-circle course formula to find the initial true bearing.
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