You are steering 231°T, and a light is picked up dead ahead at a distance of 12.3 miles at 0338. You change course to pass the light 4 miles off abeam to starboard. If you are making 16.5 knots, what is your ETA at the position 4 miles off the light?

Question

You are steering 231&deg;T, and a light is picked up dead ahead at a distance of 12.3 miles at 0338. You change course to pass the light 4 miles off abeam to starboard. If you are making 16.5 knots, what is your ETA at the position 4 miles off the light?

Accepted Answer

Option B: 0420. Calculate the distance to the abeam point using the Pythagorean theorem: square root of (12.3 squared minus 4 squared) equals 11.63 miles. At 16.5 knots, the time required is 11.63/16.5 multiplied by 60, which is 42 minutes. Adding 42 minutes to 0338 results in an ETA of 0420.

You are steering 231&deg;T, and a light is picked up dead ahead at a distance of 12.3 miles at 0338. You change course to pass the light 4 miles off abeam to starboard. If you are making 16.5 knots, what is your ETA at the position 4 miles off the light?

You are steering 231°T, and a light is picked up dead ahead at a distance of 12.3 miles at 0338. You change course to pass the light 4 miles off abeam to starboard. If you are making 16.5 knots, what is your ETA at the position 4 miles off the light?