Navigation Problems USCG Question #1113 (Set 33)

On 10 December your 1300 zone time (ZT) DR position is LAT 26°27.0'S, LONG 79°04.0'E. You are on course 068°T at a speed of 14 knots. What will be the zone time of sunset at your vessel?

Official USCG Answer & Rule Citation

Correct Answer: Option A — 1824

Determine sunset time by interpolating the Nautical Almanac values for the vessel's latitude. Apply the longitude correction factor to convert GMT to zone time. Given the vessel's speed and course, the calculated time of sunset at the vessel's position is 1824, consistent with standard celestial navigation procedures.

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