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 D — 223°T

Per Bowditch navigational formulas, calculating the great circle initial course between southern Chile and the Torres Strait involves solving the navigational triangle using departure and arrival coordinates, yielding an initial departure heading of 223°T.