A great circle crosses the equator at 134°E. It will also cross the equator at what other longitude?
Official USCG Answer & Rule Citation
Correct Answer: Option A — 46°W
A great circle bisects the equator at antipodal points separated by precisely 180 degrees of longitude. Applying this rule to 134°E (180° minus 134° = 46°) and switching hemispheres gives 46°W, per standard navigational spherical trigonometry.
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