Civil twilight occurs at 0558 zone time on 30 December. Your DR position at that time is LAT 15°02'N, LONG 46°02'W. Which statement concerning the planets available for morning sights is TRUE?
Official USCG Answer & Rule Citation
Correct Answer: Option C — At 0558, Mars can be used for an ex-meridian observation.
An ex-meridian observation measures a celestial body near the meridian to determine latitude; when a body is near the prime vertical, it provides optimal longitude determinations.
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