The initial great circle course angle between LAT 23°00'S, LONG 42°00'W and LAT 34°00'S, LONG 18°00'E is 063.8°. What is the true course?

Correct Answer: Option D — 116.2°T

Converting a quadrant-style great circle course angle (S 63.8°E) to true course involves measuring clockwise from North. For a southeast heading in the southern hemisphere, subtract the angle from 180°, yielding 116.2°T, in accordance with Bowditch navigational reduction procedures.