At 1000 ZT 21 October your DR position is LAT 29°00'N, LONG 134°40'E. Determine the computed altitude (Hc) of the Sun for the assumed position nearest to the above given latitude and longitude, given a chronometer time of 01h 00m 00s.

Correct Answer: Option C — Hc 42°35.7'

Compute the altitude (Hc) using the intercept method. Determine the GHA and declination of the Sun for the exact GMT. Calculate the LHA and use the law of cosines or the sight reduction tables (Pub. 229) to solve for the altitude, which yields the correct value of 42°35.7'.