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- Q135 - Navigation Problems: Oceans
186. On 18 November your 1750 zone time DR position is LONG 110°16.0' W. At that time you observe Polaris with a sextant altitude (hs) of 21°29.8'. The chronometer time of the sight is 00h 52m 43s, and the chronometer error is 02m 18s fast. The index error is 3.2' on the arc, and the height of eye is 49.5 feet. What is your latitude by Polaris?
After correcting the sextant altitude for index error, dip, and refraction, and applying Polaris table corrections based on the LHA Aries, the latitude is determined to be 2103.4′ N.
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