Your vessel is underway on a course of 115°T at 18 knots. At 1850 a lighthouse bears 137.5°T. At 1920, the same lighthouse bears 160°T. What time will the lighthouse pass abeam to starboard?

Correct Answer: Option A — 1941

The time to reach the abeam position is calculated by determining the distance to the abeam point and dividing by the vessel's speed. Using the relative bearings and the elapsed time between observations, the vessel will pass the lighthouse abeam at 1941, following standard piloting techniques.