Determine the great circle initial course from LAT 37°12.6'S, LONG 73°58.0'W to LAT 10°33.0'S, LONG 142°08.0'E.

Correct Answer: Option A — 223°T

Applying spherical trigonometry, specifically the cosine rule for sides, to the given latitude and longitude coordinates provides the initial great circle course. The calculation confirms that the initial heading required to follow the great circle track between these two points is 223 degrees True.