At upper transit, if the zenith distance is 34°, the geographical distance from the observer to a body's GP is __________.
Official USCG Answer & Rule Citation
Correct Answer: Option C — 2040 miles
Zenith distance represents the angular distance from the observer to the celestial body's Geographical Position (GP). According to Bowditch, each degree of arc equals 60 nautical miles. Multiplying the 34° zenith distance by 60 miles per degree yields exactly 2,040 miles.
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