You are underway on course 254°T at a speed of 16.5 knots. You sight a rock bearing 255°T at a radar range of 6.1 miles at 0916. If you change course at 0922, what is the course to steer to leave the rock abeam to starboard at 1.5 miles?

Correct Answer: Option B — 236°T

Calculate the vessel's position at 0922 using dead reckoning from the 0916 fix. Utilizing the relative motion triangle, solve for the course that places the rock 1.5 miles abeam to starboard. The geometry of the triangle dictates a course of 236°T to satisfy the required CPA.