On 3 April your vessel's 1400 ZT DR position is LAT 20°08.0' N, LONG 147°45.0' W. You are steering course 023°T at 18.0 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 1900 running fix.

Correct Answer: Option D — LAT 21°40.0'N, LONG 147°03.2'W

Advancing the celestial lines of position across the 5-hour interval requires applying the calculated run (18 knots for 5 hours = 90 miles along course 023°T) to the initial lines, yielding the updated running fix coordinates LAT 21°40.0'N, LONG 147°03.2'W.