On 1 December your 1600 ZT DR position is LAT 22°48.0'S, LONG 91°26.0'E. You are on course 327°T at a speed of 16 knots. What will be the zone time of sunset at your vessel?

Correct Answer: Option D — 1827

Calculate sunset using the Nautical Almanac for the given latitude and date. Adjust the tabular time for the vessel's longitude and the change in position due to the vessel's movement at 16 knots on course 327°T. Interpolation yields the correct zone time of 1827 for the vessel's position.