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- Q127 - Navigation Problems: Oceans
243. On 29 October in DR position LAT 41°12.0'N, LONG 50°18.9'W, you take an ex-meridian observation of the Sun's lower limb, near upper transit. The chronometer time of the sight is 03h 21m 12s, and the chronometer error is 01m 50s slow. The sextant altitude (hs) is 34°54.2'. The index error is 2.0' on the arc, and your height of eye is 45 feet. What is the latitude at meridian transit?
The latitude at meridian transit is determined by correcting the sextant altitude for index error, dip, refraction, and semi-diameter, then applying an ex-meridian correction based on the time difference from meridian passage and the Sun's declination, resulting in a latitude of 4116.0'N.
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