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- Q127 - Navigation Problems: Oceans
62. On 12 February your 0542 zone time (ZT) fix gives you a position of LAT 26° 42.0' N, LONG 60° 18.0' W. Your vessel is on course 300° T, and your speed is 9.8 knots. Local apparent noon (LAN) occurs at 1220 ZT at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 49° 10.0'. What is the calculated latitude at LAN?
The latitude at LAN is calculated by subtracting the absolute value of the Sun's declination from the zenith distance. With opposite names (northern latitude and southern declination), the latitude is the zenith distance minus the declination, resulting in 27 16.3' N.
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