Your vessel is steering 049°T at 15 knots. At 1914 a light bears 078°T, and at 1951 the same light bears 116°T. What will be your distance off abeam?

Correct Answer: Option B — 6.7 miles

Applying Bowditch piloting principles for running fixes and bow-and-beam bearings, distance run between bearings divided by factors corresponding to relative angles determines the abeam distance. At 15 knots over a 37-minute run, mathematical resolution of the triangle yields 6.7 miles off abeam.