Your vessel is on a course of 207°T at 13 knots. At 0539 a light bears 180.5°T, and at 0620 the light bears 162°T. At what time and at what distance off will your vessel be when abeam of the light?

Correct Answer: Option D — 0701, 8.9 miles

Applying Bowditch navigation procedures, the time elapsed between initial and final bearings combined with the 13-knot speed establishes the base run. Trigonometric resolution of the relative bearings yields an abeam distance of 8.9 miles at 0701.