You are on a great circle track departing from position LAT 25°50'N, LONG 77°00'W. The position of the vertex is LAT 37°35.6'N, LONG 25°57.8'W. The distance along the great circle track from the vertex to a point (X) is 600 miles westward. Determine the position of point (X) on the great circle track.

Correct Answer: Option B — LAT 36°55.6'N, LONG 38°30.0'W

Intermediate points along a great circle track are computed using the Gavrilov or standard spherical triangle formulas outlined in Bowditch, using the vertex coordinates and the remaining distance along the arc to solve for latitude and longitude.