Your vessel is on a course of 297°T at 11 knots. At 0019 a light bears 274.5°T and at 0048 the light bears 252°T. At what time and at what distance off will your vessel be when abeam of the light?

Correct Answer: Option B — 0108, 3.7 miles

Utilize the running fix principle and the 60-D-ST formula. The elapsed time between bearings is 29 minutes. By calculating the relative bearing change and applying the distance run between bearings, the vessel reaches the abeam position at 0108 with a calculated distance off of 3.7 miles.