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- Q127 - Navigation Problems: Oceans
69. On 12 September your 0600 zone time (ZT) fix gives you a position of LAT 22°51.9'N, LONG 133°40.1'W. Your vessel is on course 062°T, and your speed is 12.3 knots. Local apparent noon (LAN) occurs at 1142 ZT, at which time a meridian altitude of the Sun's upper limb is observed. The observed altitude (Ho) for this sight is 70°33.2'. What is the calculated latitude at LAN?
The correct latitude at LAN is 2324.8'N, determined by advancing the initial position along the vessel's course and speed, and by reducing the observed Sun's meridian altitude.
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