Your vessel is steering 074°T at 12 knots. At 0214 a light bears 115°T, and at 0223 the same light bears 135°T. What will be your distance off abeam?

Correct Answer: Option A — 3.0 miles

The run distance is 1.8 miles over 9 minutes. Relative bearings are 41 degrees and 61 degrees. Calculating the distance off at the second bearing and projecting to the beam position using the sine of the relative angle results in 3.0 miles, adhering to standard navigational geometry.