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- Q135 - Navigation Problems: Oceans
133. On 15 November your 0913 zone time fix gives you a position of LAT 22°30.0'N, LONG 68°28.0'W. Your vessel is on course 164°T, and your speed is 13.5 knots. Local apparent noon (LAN) occurs at 1118 zone time at which time meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 49°46.0'. What is the calculated latitude at LAN?
The calculated latitude at LAN is determined using the meridian altitude formula, considering the zenith distance and the Sun's declination. The correct latitude, derived from the observed altitude and declination, is 2139.3'N.
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