On 22 June your 0424 DR position is LAT 26°18.5' N, LONG 124°18.2' W. You observe an unidentified star bearing 154°T at an observed altitude (Ho) of 15°01.2'. The chronometer reads 12h 23m 24s, and is 01m 32s slow. What star did you observe?
Official USCG Answer & Rule Citation
Correct Answer: Option C — Ankaa
Determine GMT from chronometer time, extract GHA Aries from the Nautical Almanac, and calculate LHA for the DR position. Using celestial sight reduction methods from Bowditch, compare computed intercepts to verify the observed star as Ankaa.
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