General Navigation USCG Question #2267 (Set 69)

You are on course 061°T. To check the longitude of your vessel you should observe a celestial body on which bearing?

Official USCG Answer & Rule Citation

Correct Answer: Option A — 090°

According to Bowditch, longitude determinations rely primarily on time sights taken when a celestial body bears east or west (090° or 270° true), where hour angle errors directly translate to longitudinal position errors.

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