On 10 April, your 1630 ZT DR position is LAT 21°03.0'N, LONG 63°11.0'W. You are on course 324°T at a speed of 22 knots. What will be the zone time of sunset at your vessel?

Correct Answer: Option A — 1833

Calculate the DR position at the approximate time of sunset. Use the Nautical Almanac to extract 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 1833.