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- Q127 - Navigation Problems: Oceans
233. On 28 July your 0800 zone time (ZT) fix gives you a position of LAT 25°16.0'N, LONG 71°19.0'W. Your vessel is on course 026°T, and your speed is 17.5 knots. Local apparent noon (LAN) occurs at 1150 ZT, at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 82°28.7'. What is the latitude at 1200 ZT?
The latitude at 1200 ZT is determined by calculating the latitude at local apparent noon (LAN) using the meridian altitude and Sun's declination, then advancing that position by the vessel's northward run over 10 minutes.
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