Your vessel is steering 218°T at 19 knots. At 2223 a light bears 261°T, and at 2234 the same light bears 289°T. What will be your distance off abeam?

Correct Answer: Option D — 4.9 miles

Utilizing standard Bowditch relative bearing formulas, distance run between observations at 19 knots over an 11-minute interval establishes the range triangle. Solving for the perpendicular side against the charted headings yields a precise distance off abeam of 4.9 miles.