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?

Question

On 29 July your 1930 zone time DR position is LONG 164&deg;26.0'E. At that time you observe Polaris with a sextant altitude (hs) of 23&deg;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?

Accepted Answer

Option B: 24&deg;19.5'N. Determine latitude using the Polaris observation method. Correct the sextant altitude for index error, dip, and refraction to obtain the observed altitude. Apply the corrections from the Nautical Almanac based on the LHA of Aries to derive the latitude of 24 degrees 19.5 minutes North.