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- Q127 - Navigation Problems: Oceans
254. On 30 August in DR position LAT 26°34.0'N, LONG 141°36.0'W, you take an ex-meridian observation of the Sun's lower limb. The chronometer time of the sight is 09h 15m 26s, and the chronometer error is 00m 00s. The sextant altitude (hs) is 71°41.7'. The index error is 3.2' off the arc, and your height of eye is 49.6 feet. What is the latitude at meridian transit?
The latitude at meridian transit is calculated by reducing the sextant altitude for index error, dip, and Sun corrections, then using ex-meridian tables to convert the observed altitude to an equivalent meridian altitude, and finally applying the meridian-altitude latitude formula with the Sun's declination.
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