Your vessel is on a course of 253°T at 18 knots. At 2027 a light bears 275.5°T, and at 2055 the light bears 298°T. At what time and at what distance off will your vessel be when abeam of the light?

Correct Answer: Option D — 2115, 5.9 miles

Running fix calculations using time intervals and vessel speed determine distance off abeam. Applying the ratio of the sine of relative bearings to run distance solves for exact abeam time and range.