What will be the time the buoy is abeam if you are sailing at a course of 035 degrees T at a speed of 18.3 knots and see it bearing 036 degrees T at a range of 4.1 nm at 0719?

To determine the time when the buoy will be abeam (at a right angle to the course), you need to calculate how long it will take to reach that position based on your current speed and direction.

You are currently sailing at a course of 035 degrees true with a bearing to the buoy of 036 degrees true. This means that the buoy is almost directly off the bow of your vessel. The range to the buoy is 4.1 nautical miles (nm).

Since you are sailing at 18.3 knots, you can calculate the time it will take to reach the point directly abeam. When the buoy is abeam, your bearing to it will be 90 degrees from your course. To find the angle to travel to reach this position, subtract your current bearing (036 degrees) from the course angle (035 degrees):

1. As you are traveling on a course of 035 degrees and the buoy is at a bearing of 036 degrees, you are essentially on a parallel course, only slightly ahead of the buoy. At this moment, you need to adjust your direction slightly to the left to have the buoy directly abeam.

Next, you can determine the time it will take to reach the point where the buoy will be