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- Q135 - Navigation Problems: Oceans
258. On 23 August in DR position LAT 24° 22.0' S, LONG 64° 55.3' E, you take an ex-meridian observation of the Moon's upper limb at upper transit. The chronometer time of the sight is 02h 15m 04s, and the chronometer error is 01m 06s fast. The sextant altitude (hs) is 48° 03.6'. The index error is 2.0' on the arc, and your height of eye is 60 feet (21.0 meters). What is the latitude at meridian transit?
After reducing the Moon's sextant altitude and applying the ex-meridian correction, the resulting latitude is 24 20.5' S, slightly north of the DR latitude, as expected.
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