At 0500 zone time on 21 August, your DR position is LAT 47°00'N, LONG 125°15'W. You are steering 000°T at a speed of 9.8 knots. What is the zone time of sunrise?

Correct Answer: Option A — 0525

Determine the sunrise time using the Nautical Almanac for the DR latitude. Adjust for the longitude difference from the zone meridian. Account for the vessel's movement on course 000°T at 9.8 knots, which shifts the observer's position relative to the sunrise line, resulting in a zone time of 0525.