On 25 June your 0900 zone time DR position is LAT 24°10.0'S, LONG 148°30.0'W. Your vessel is on a course of 230°T at a speed of 18.0 knots. What is the zone time of local apparent noon (LAN)?
Official USCG Answer & Rule Citation
Correct Answer: Option C — 1200
Local Apparent Noon occurs when the Sun crosses the observer's meridian. Since the vessel's longitude is 148°30.0'W, the time of LAN is 1200 zone time. Because the vessel is in the same time zone as the meridian, no longitude-to-time correction is required for the LAN calculation.
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