On 30 July your 1030 ZT DR position is LAT 17°46'N, LONG 139°30'W. You are on course 129°T, speed 24 knots. Determine your 1200 position using the following observations of the Sun.

Correct Answer: Option A — LAT 17°15.1'N, LONG 139°00.0'W

Running fix calculations involve advancing the 1030 LOP by the course and distance run (36 miles at 129°T) to the 1200 time of the second observation. The intersection of the advanced LOP and the 1200 meridian altitude provides the final position of LAT 17°15.1'N, LONG 139°00.0'W.