On 6 April your 1830 ZT DR position is LAT 26°33.0' N, LONG 64°31.0' W. You are on course 082°T at a speed of 16 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 1900 running fix.

Correct Answer: Option C — LAT 26°32.5'N, LONG 64°27.1'W

Advancing a celestial line of position requires applying the course and speed vector from the initial DR across the time interval. For a 30-minute run at 16 knots on course 082°T, the computed set-forward yields the precise running fix matching LAT 26°32.5'N, LONG 64°27.1'W.