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?

Correct Answer: Option A — 1813

Determine the sunset time by interpolating the Nautical Almanac tables for the vessel's latitude. Account for the change in longitude as the vessel steams at 16 knots on course 327°T. The combined effect of latitude shift and longitudinal progression results in a calculated zone time of 1813.