Navigation Problems USCG Question #719 (Set 21)

Determine the great circle distance and initial course from LAT 35°08.0'S, LONG 19°26.0'E to LAT 33°16.0'S, LONG 115°36.0'E.

Official USCG Answer & Rule Citation

Correct Answer: Option B — 4559 miles, 121°T

Utilize great circle sailing formulas from Bowditch, specifically solving the spherical triangle formed by the pole and the two waypoints. Applying spherical trigonometry yields the shortest surface distance of 4559 miles and an initial great circle course angle corresponding to 121°T.

100% Free & Open Access — No daily limits, paywalls, or gated answers on BrightMariner.