You are underway on course 137°T at a speed of 16.2 knots. You sight a rock bearing 134°T at a radar range of 4.6 miles at 1508. If you change course at 1514, what is the course to steer to leave the rock abeam to port at 1.5 miles?

Correct Answer: Option C — 162°T

Calculate distance traveled between 1508 and 1514 (6 minutes at 16.2 knots = 1.62 miles). Plot the initial position and the target abeam position. Using the relative motion triangle, the course change required to pass the rock at 1.5 miles to port is 162T.