A great circle crosses the equator at 17°W. It will also cross the equator at what other longitude?
Official USCG Answer & Rule Citation
Correct Answer: Option B — 163°E
Great circle tracks intersect the equator at antipodal points located 180° apart in longitude. Subtracting 17°W from 180° yields 163° and flips the meridian designation from West to East, resulting in 163°E as referenced in Bowditch.
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