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- Q159 - Navigation Problems: Oceans
158. On 8 May in DR position LAT 30° 26.0' N, LONG 46° 55.1' W, you take an ex-meridian observation of Dubhe. The chronometer time of the sight is 11h 10m 54s, and the chronometer error is 01m 18s slow. The sextant altitude (hs) is 58° 35.0'. The index error is 1.5' on the arc, and your height of eye is 44 feet. What is the latitude at meridian transit?
The latitude at meridian transit is 30 19.8' N, calculated by combining the corrected meridian altitude of Dubhe with its declination using the formula φ = Hm + δ - 90.
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