Your vessel is steering 194°T at 13 knots. At 0116 a light bears 243°T, and at 0147 the same light bears 267°T. What will be your distance off abeam?

Correct Answer: Option B — 12.0 miles

The run distance is 6.71 miles over 31 minutes. Relative bearings are 49 degrees and 73 degrees. Calculating the distance off at the second bearing and projecting to the beam position using the sine of the relative angle results in 12.0 miles, a standard procedure for coastal navigation.