On 25 October your 0430 ZT DR position is LAT 24°48' N, LONG 65°31' W. Your vessel is on course 030°T at a speed of 18 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0455 running fix.

Correct Answer: Option A — LAT 24°53'N, LONG 65°28'W

Celestial running fixes require advancing lines of position along the estimated dead reckoning track using course and speed vectors. For an 0430 ZT position running to an 0455 ZT fix on course 030°T at 18 knots, dead reckoning updates result in LAT 24°53'N, LONG 65°28'W.