Your vessel is on a course of 316°T at 12 knots. At 2326 a light bears 289.5°T, and at 2354 the light bears 271°T. At what time and at what distance off will your vessel be when abeam of the light?

Correct Answer: Option D — 0022, 5.6 miles

Standard Bowditch piloting formulas for two bearings of a fixed object require computing the run between sights. Applying trigonometric factors for the angles off the bow results in an abeam distance of 5.6 miles at 0022.