Navigation Problems USCG Question #1139 (Set 34)

On 1 November your 1600 zone time DR position is LAT 27°48'S, LONG 91°26'E. Your vessel is on a course of 327° T at a speed of 16 knots. What will be the zone time of sunset at your vessel?

Official USCG Answer & Rule Citation

Correct Answer: Option A — 1813

Calculate the sunset time using the Nautical Almanac tables for the vessel's latitude. Apply the correction for longitude by converting the difference between the DR longitude and the standard meridian into time. Adjusting for the vessel's movement toward the sunset results in a zone time of 1813.

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