What is the geographic longitude of a body whose GHA is 232°27'?
Official USCG Answer & Rule Citation
Correct Answer: Option D — 127°33'E
Geographic longitude is derived from Greenwich Hour Angle by subtracting GHA from 360° when GHA exceeds 180°, designating the result as East longitude. Thus, 360°00' - 232°27' yields 127°33'E, matching standard celestial navigation reduction procedures outlined in Bowditch.
100% Free & Open Access — No daily limits, paywalls, or gated answers on BrightMariner.