Your vessel is on a course of 126°T at 17 knots. At 0251 a light bears 099.5°T, and at 0313 the light bears 081°T. At what time and at what distance off will your vessel be when abeam of the light?

Correct Answer: Option B — 0335, 6.2 miles

Utilize the 'doubling the angle on the bow' or 'relative bearing' method. The change in bearing over the elapsed time allows for the calculation of the distance run between bearings. Using the law of sines or right-triangle trigonometry, determine the distance off when the light is abeam at 0335.