87. At 1800 zone time, on 7 December, your DR position is LAT 22°48'S, LONG 91°26'W. You are steering 320°T at a speed of 14.0 knots. What is the zone time of sunset?

The correct sunset zone time is 1842. This is determined by adding a 6-minute longitude correction to the Local Mean Time (LMT) of sunset, which is obtained from the Nautical Almanac. The longitude correction accounts for being 126′ west of the zone meridian at 90W.