Determine the great circle initial course from LAT 29°46.0'S, LONG 30°26.0'E to LAT 31°52.0'S, LONG 115°22.0'E.

Correct Answer: Option C — 117°T

Apply the spherical cosine rule for the initial course angle. Given the latitude and longitude of both points, the change in longitude and the difference in latitude are used to solve for the initial great circle bearing, which calculates to 117°T.