Navigation Problems USCG Question #75 (Set 3)

On 26 November your 0535 DR position is LAT 27°18.9' S, LONG 30°18.4' E. You observe an unidentified planet bearing 085°T at an observed altitude (Ho) of 32°15.2'. The chronometer reads 03h 33m 16s, and is 01m 48s slow. What planet did you observe?

Official USCG Answer & Rule Citation

Correct Answer: Option C — Jupiter

Determine GHA and Declination using the Nautical Almanac for the corrected GMT of 03h 35m 04s. Calculate the intercept and azimuth using the DR position. Comparing the calculated LHA and Declination against the Sight Reduction Tables for Air Navigation or Pub. 229 confirms the body is Jupiter.

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