Your vessel is on a course of 307°T at 20 knots. At 0914 a light bears 284.5°T, and at 0937 the light bears 262°T. At what time and at what distance off will your vessel be when abeam of the light?

Correct Answer: Option B — 0953, 5.4 miles

Apply standard double-angle or special angle running fix formulas for a light bearing change at 20-knot speed. Calculating the time elapsed between bearings (0914 to 0937) yields an abeam time of 0953 and an abeam distance off of 5.4 miles.