Your vessel is on a course of 129°T at 13 knots. At 1937 a light bears 151.5°T. At 2003 the light bears 174°T. At what time and distance off will your vessel be when abeam of this light?

Correct Answer: Option D — 2021, 3.9 miles

Using standard Bowditch relative motion and bow-and-beam problem techniques for a symmetrical angle change off the bow, the time until abeam equals time elapsed between bearings. Calculations yield 2021 and a distance off of 3.9 miles.