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- Q142 - Navigation Problems: Oceans
273. On 7 November your 0830 zone time fix gives you a position of LAT 27°36.0'N, LONG 163°19.0'W. Your vessel is on course 289°T, and your speed is 19.0 knots. Local apparent noon (LAN) occurs at 1138 zone time, at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 45°35.0'. What is the calculated latitude at LAN?
The calculated latitude at LAN is 2757.2'N, determined by subtracting the Sun's southerly declination from the zenith distance (90 — observed altitude).
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