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- Q135 - Navigation Problems: Oceans
228. On 22 August in DR position LAT 29° 41.8' N, LONG 33° 15.5' W, you take an ex-meridian observation of the Moon's upper limb at upper transit. The chronometer time of the sight is 08h 00m 02s, and the chronometer error is 02m 20s slow. The sextant altitude (hs) is 74° 32.4'. The index error is 1.5' off the arc, and your height of eye is 48 feet. What is the latitude at meridian transit?
To determine the latitude at meridian transit, convert the sextant altitude to a corrected meridian altitude, then apply the same-name meridian-altitude formula L = 90 — H0,M + Dec.
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