Your vessel is on a course of 358°T at 19 knots. At 0316 a light bears 024.5°T, and at 0334 the light bears 043°T. At what time and at what distance off will your vessel be when abeam of the light?

Correct Answer: Option C — 0352, 5.7 miles

Utilizing the doubling of the angle on the bow or general running fix formulas, the distance off at the second bearing is calculated as (Run * sin(Relative Bearing 1)) / sin(Change in Bearing). At 19 knots, the vessel reaches the abeam position at 0352 at 5.7 miles.