Your vessel is steering 354°T at 14 knots. At 0317 a light bears 049°T, and at 0342 the same light bears 071°T. What will be your distance off abeam?

Correct Answer: Option B — 12.4 miles

The run distance is 5.83 miles over 25 minutes. Relative bearings are 55 degrees and 77 degrees. Calculating the distance off at the second bearing and projecting it to the beam position using the sine of the relative angle results in 12.4 miles, a standard navigational practice.