On 16 February your 0300 ZT DR position is LAT 28°32.0'S, LONG 176°49.0'E. You are on course 082°T at a speed of 21 knots. What will be the zone time of sunrise at your vessel?

Correct Answer: Option C — 0552

Calculate the vessel's position at sunrise using the DR course and speed. Use the Nautical Almanac sunrise tables for the estimated latitude, interpolating for the date and longitude. Adjusting for the time zone, the calculated zone time of sunrise is 0552, following standard celestial navigation procedures.