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- Q127 - Navigation Problems: Oceans
111. On 16 September your 0600 ZT fix gives you a position of LAT 29°47.2'N, LONG 65°28.4'W. Your vessel is on course 242°T and your speed is 13.5 knots. Local apparent noon (LAN) occurs at 1227 ZT, at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 63°25.3'. What is the calculated latitude at LAN?
Latitude at local apparent noon is calculated by adding the zenith distance and the Sun's declination when both are north and the Sun is south of the observer, resulting in a latitude of 2904.7'N.
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