On 5 May your 1800 ZT DR position is LAT 26°11.5'N, LONG 65°35.0'W. You are on course 270°T at a speed of 12 knots. What will be the ZT of sunset at your vessel?

Correct Answer: Option D — 1857

Calculate the LMT of sunset using the Nautical Almanac's 'Sun' tables for the given latitude and date. Convert LMT to ZT by applying the longitude correction (Time = Longitude / 15°). Adjust for the vessel's movement during the interval to arrive at the final ZT of 1857.