You are steaming on a course of 058°T at 11.5 knots. At 0209 you observe a lighthouse bearing 129°T. At 0252 the lighthouse bears 173°T. What is your distance off at the second bearing?

Correct Answer: Option D — 11.2 miles

Using standard Bowditch relative bearing formulas for a two-bearing running fix, time elapsed and vessel speed establish the run baseline, yielding a calculated distance off of 11.2 miles at the second observation.