On 5 May your 1300 ZT DR position is LAT 25°16.0'S, LONG 12°30.0'W. You are on course 012°T at a speed of 14 knots. What will be the zone time of sunset at your vessel?

Correct Answer: Option D — 1719

Determine the DR position at the approximate time of sunset. Use the Nautical Almanac to find the tabular sunset time for the latitude and date. Apply the longitude correction to adjust the tabular time to the vessel's zone time, resulting in 1719.