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- Q135 - Navigation Problems: Oceans
322. On 29 July your 1930 zone time DR position is LONG 164°26.0'E. At that time you observe Polaris with a sextant altitude (hs) of 23°46.8'. The chronometer time of the sight is 08h 32m 18s, and the chronometer error is 02m 26s fast. The index error is 2.7' on the arc, and the height of eye is 56.0 feet. What is your latitude by Polaris?
The correct latitude is determined by reducing the sextant altitude of Polaris, accounting for index error, height of eye, refraction, and applying corrections from the Nautical Almanac using the computed GMT and LHA Aries, resulting in 2419.5'N.
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