Your vessel is on a course of 052°T at 16 knots. At 0916 a light bears 078.5°T, and at 0927 the light bears 097°T. At what time and at what distance off will your vessel be when abeam of the light?

Correct Answer: Option D — 0938, 2.9 miles

Utilize the running fix method for a light abeam. The change in bearing (28.5°) and time interval (11 minutes) at 16 knots allows calculation of the distance off at the second bearing. Applying the 60D/t formula determines the distance off abeam is 2.9 miles at 0938.