General Navigation USCG Question #510 (Set 17)

The values of the Greenwich hour angle and declination, tabulated in all almanacs, are for the __________.

Official USCG Answer & Rule Citation

Correct Answer: Option C — centers of the various celestial bodies

Bowditch and navigational almanac standards specify that tabulated Greenwich Hour Angle (GHA) and declination values for stars and planets represent their true geometric centers, whereas Sun and Moon tables account for their semi-diameters.

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