On 28 October at 1754 ZT, your vessel's DR position is LAT 28°30' N, LONG 63°24' W. At this time, you obtain a sextant altitude (hs) of Polaris reading 28°42.6', with an index error of 2.4' on the arc. Your chronometer reads 09h 50m 00s, and is 4m 14s slow. What is your latitude by Polaris, given a height of eye of 28 feet (8.5 meters)?

Question

Accepted Answer

Option C: 28°34.9'N. Latitude by Polaris is found by correcting sextant altitude for index error, height of eye, and refraction to obtain Ho. Subtract 1° from Ho and apply tabular corrections based on Local Hour Angle of Aries from the Nautical Almanac.