You are underway on course 059°T at a speed of 13.8 knots. You sight a light bearing 064°T at a radar range of 5.1 miles at 1839. If you change course at 1845, what is the course to steer to leave the light abeam to starboard at 1.0 mile?

Correct Answer: Option B — 050°T

Calculate distance traveled between 1839 and 1845 (6 minutes at 13.8 knots = 1.38 miles). Using the relative motion triangle, determine the bearing and distance to the light. Solving for the course change required to pass the light at a 1.0-mile abeam distance yields 050T.