On 27 September your 0345 ZT DR position is LAT 26°18.0'S, LONG 4°18.0'W. You are on course 271°T at a speed of 15 knots. What will be the zone time of sunrise at your vessel?

Correct Answer: Option D — 0605

Use the Nautical Almanac to find the time of sunrise at the DR latitude. Apply the longitude correction to convert LMT to ZT. Adjust for the vessel's movement toward the east, which advances the sunrise time. The final calculated zone time for sunrise is 0605.