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'.
100% Free & Open Access — No daily limits, paywalls, or gated answers on BrightMariner.