On 18 October your 1330 ZT DR position is LAT 27°32.0'N, LONG 154°47.0'W. You are on course 115°T at a speed of 20 knots. What will be the zone time of sunset at your vessel?

Correct Answer: Option A — 1742

Calculate the DR position at the estimated sunset time. Using the Nautical Almanac, extract the sunset time for the latitude and date. Apply the longitude correction factor to adjust the tabular time to the vessel's specific zone meridian, resulting in a calculated zone time of 1742.