You are on course 061°T, at a speed of 12.4 knots. At 0839 you see a rock bearing 059°T at a range of 4.4 miles. If you change course at 0845 to leave the rock abeam to starboard at 1.5 mile, at what time will the rock be abeam?

Correct Answer: Option A — 0859

In accordance with Bowditch chartwork standards, track the vessel's run from the initial observation at 0839 through the course alteration at 0845. Calculating the remaining vector to pass the rock 1.5 miles abeam to starboard results in an exact abeam time of 0859.