At 0600 zone time, on 16 March your DR position is LAT 20°10.0'N, LONG 81°30.0'W. You are steering course 300°T. The speed over the ground is 10 knots. You observed 3 morning sun lines. Determine the latitude and longitude of your 1130 running fix?

Correct Answer: Option A — LAT 20°39.0'N, LONG 82°22.9'W

Advancing morning sunlines along the vessel's run vector to the designated fix time establishes the running fix. Standard nautical astronomy practices govern the intercept and advancement methodology.