Navigation Problems USCG Question #89 (Set 3)

On 10 October your 0930 zone time position is LAT 25°00.0'S, LONG 164°38.6'W. Your vessel is on course 180°T at a speed to 10.0 knots. What is the zone time of local apparent noon (LAN)?

Official USCG Answer & Rule Citation

Correct Answer: Option A — 1145

Calculate the longitude of the vessel at the estimated time of LAN. Convert the longitude to time (1 degree = 4 minutes). Apply this to the reference meridian (150°W for this zone) to determine the ZT when the Sun crosses the observer's local meridian, resulting in 1145.

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