You are underway on course 128°T at a speed of 17.6 knots. You sight a daymark bearing 126°T at a radar range of 4.3 miles at 1649. If you change course at 1654, what is the course to steer to leave the daymark abeam to starboard at 0.5 mile?

Correct Answer: Option B — 113°T

Calculate distance traveled between 1649 and 1654 (5 minutes at 17.6 knots = 1.47 miles). Plot the initial position and the target abeam position. Using the relative motion triangle, the course change required to pass the daymark at 0.5 miles to starboard is 113T.