On 17 May your 0300 ZT DR position is LAT 27°21.0'N, LONG 146°14.0'E. You are on course 107°T at a speed of 18 knots. What will be the zone time of sunrise at your vessel?

Correct Answer: Option D — 0522

To determine sunrise zone time, extract tabular sunrise data for the latitude and date, apply longitude corrections, and update the vessel position using course and speed vectors from the 0300 ZT DR reference point.