At 1730 zone time, on 3 March, your DR position is LAT 16°00'S, LONG 80°00'W. You are steering 000°T at a speed of 7.5 knots. What is the zone time of sunset?

Correct Answer: Option D — 1843

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 1843.