Your vessel is steering 283°T at 10 knots. At 0538 a light bears 350°T, and at 0552 the same light bears 002°T. What will be your distance off abeam?

Correct Answer: Option A — 10.3 miles

Solving coastal navigation triangles per Bowditch techniques involves calculating distance run at 10 knots over a 14-minute interval. Trigonometric reduction of the bearings relative to course 283°T accurately resolves the perpendicular distance off abeam to 10.3 miles.