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 D — Hc 34°58.6'
Determine GHA and declination of the Sun for the given GMT. Using an assumed position near the DR, calculate the LHA. Apply the law of cosines for spherical trigonometry or Pub. 229 to find the computed altitude (Hc), which yields 34°58.6' for the given coordinates.
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