You are underway on course 017°T at a speed of 14.2 knots. You sight a buoy bearing 025°T at a radar range of 3.7 miles at 1947. If you change course at 1953, what is the course to steer to leave the buoy abeam to starboard at 0.1 mile?

Correct Answer: Option C — 027°T

Calculate the vessel's position at the time of the turn (1953). The vessel travels 1.42 miles in 6 minutes. Using relative motion and trigonometry, determine the new course required to achieve a 0.1-mile CPA. Solving the triangle of velocities confirms 027°T is the necessary heading to clear the buoy.