At 0900 zone time on 23 September your DR position is LAT 28°48.0'N, LONG 153°11.5'W. You are steering course 257°T at a speed of 18.0 knots. You observed 3 morning sun lines. Determine the latitude and longitude of your 1020 running fix?

Correct Answer: Option D — 28°49.1'N, 153°37.0'W

Advancing morning sun lines by 80 minutes at 18 knots along course 257°T shifts the intercept lines appropriately. The resulting graphical or algebraic intersection with the third line establishes the running fix at LAT 28°49.1'N, LONG 153°37.0'W following standard Bowditch sight reduction procedures.