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- Q135 - Navigation Problems: Oceans
229. On 22 February your 0612 zone time fix gives you a position of LAT 27°16.2'S, LONG 37°41.6'W. Your vessel is on course 298°T, and your speed is 14.2 knots. Local apparent noon (LAN) occurs at 1147 zone time, at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 73°33.3'. What is the calculated latitude at LAN?
The correct latitude at Local Apparent Noon (LAN) is 2631.4'S, calculated by adding the zenith distance (1626.7') and the Sun's declination (1004.7') for a same-name, observer-poleward scenario.
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