Your vessel is on a course of 079°T at 11 knots. At 0152 a light bears 105.5°T, and at 0209 the light bears 124°T. At what time and at what distance off will your vessel be when abeam of the light?

Correct Answer: Option D — 0226, 3.1 miles

Using Bowditch's bow-and-beam bearing or double-angle sailing principles, the time interval between bearings (17 minutes) and speed (11 knots) establish run distance. Solving the relative movement triangle determines abeam time at 0226 with a passing distance off of 3.1 miles.