While on course 321°pgc with a 1°W gyro error, you pick up a buoy on radar bearing 001° relative at 5.2 miles. What will be the course to pass the buoy by 1 mile abeam to starboard, if you change course when the buoy is 4.5 miles away?

Correct Answer: Option B — 310°pgc

Using the relative bearing of 001° and distance of 5.2 miles, the buoy is nearly dead ahead. To pass 1 mile abeam, apply the principles of relative motion. Calculating the required course change to achieve a 1-mile CPA at 4.5 miles results in a compass heading of 310°pgc.