Navigation Problems USCG Question #233 (Set 7)

On 26 November at 0535 ZT, while taking sights for a morning fix, you observe an unidentified planet bearing 074°T at an observed altitude (Ho) of 38°29.8'. Your DR position is LAT 27°18.9' S, LONG 30°18.4' E. The chronometer time of the sight is 03h 33m 16s, and the chronometer is 01m 48s slow. What planet did you observe?

Official USCG Answer & Rule Citation

Correct Answer: Option C — Saturn

Calculate GMT and determine the planet's GHA and Declination from the Nautical Almanac. Using the intercept method, compare the calculated altitude and azimuth to the observed data. The resulting values confirm Saturn, as the planet's position relative to the DR position matches the observed bearing and altitude.

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