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 C — 0522

Determine the vessel's position at sunrise by advancing the DR position along the course of 107°T. Use the Nautical Almanac's sunrise tables for the latitude, applying the longitude correction to convert LMT to Zone Time. Interpolation confirms the sunrise occurs at 0522 ZT.