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?
Official USCG Answer & Rule Citation
Correct Answer: Option D — 0605
Sunrise calculations utilize the Nautical Almanac tabulated values for LAN, semi-duration of daylight based on latitude and declination, and longitude corrections. Adjust for vessel movement along its course and speed vector from the initial DR time.
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