The upper vertex of a great circle track is in LONG 156°00'E. Sailing eastward, the great circle track will cross the equator in LONG __________.

Correct Answer: Option D — 114°00'W

A great circle vertex lies 90° in longitude from its equatorial crossings. Sailing eastward from 156°00'E, add 90° to reach 246°00'E; subtracting 360° leaves 114°00'W, matching the antipodal equatorial intersection rules outlined in Bowditch.