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- Q127 - Navigation Problems: Oceans
118. On 17 December your 0600 ZT fix gives you a position of LAT 27°16.7'N, LONG 138°39.2'W. Your vessel is on course 137°T, and your speed is 14.8 knots. Local apparent noon (LAN) occurs at 1207 ZT, at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 40°22.1'. What is the calculated latitude at LAN?
The calculated latitude at LAN is 2615.4'N, determined by applying the meridian altitude relationship using the observed altitude, zenith distance, and the Sun's declination for December 17.
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