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- Q127 - Navigation Problems: Oceans
91. On 15 November your 0813 zone time (ZT) fix gives you a position of LAT 22°30.0'N, LONG 67°28.0'W. Your vessel is on course 164°T, and your speed is 13.5 knots. Local apparent noon (LAN) occurs at 1215 ZT, at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 49°46.0'. What is the latitude at 1200 ZT?
The latitude at 1200 ZT is determined by calculating the latitude at local apparent noon (LAN) and then adjusting for the vessel's southward movement during the 15 minutes preceding noon.
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