Navigation Problems USCG Question #1094 (Set 32)

At 0800 ZT on 29 June your DR position is LAT 26°00.0'N, LONG 75°29.5'W. Given a chronometer time of 01h 00m 00s, determine the computed altitude (Hc) of the Sun for the assumed position nearest to the above given latitude and longitude.

Official USCG Answer & Rule Citation

Correct Answer: Option C — Hc 34°58.6'

Computed altitude (Hc) is determined via the cosine-haversine formula using assumed latitude, local hour angle, and declination from the Nautical Almanac. Applying these celestial sight reduction principles yields an Hc of 34°58.6'.

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