You are enroute to assist vessel A. Vessel A is underway at 6 knots on course 133°T, and bears 042°T, 105 miles from you. What is the time to intercept if you make 10 knots?

Correct Answer: Option C — 12h 58m

Intercept time calculation requires determining the closing speed along the relative movement line. Using standard vector triangle solutions for vessel A at 6 knots on 133°T and own ship at 10 knots, the calculated time to intercept is 12h 58m.