Your vessel is on a course of 343°T at 14 knots. At 2156 a light bears 320.5°T, and at 2217 the light bears 298°T. At what time and distance off will your vessel be when abeam of the light?

Question

Your vessel is on a course of 343&deg;T at 14 knots. At 2156 a light bears 320.5&deg;T, and at 2217 the light bears 298&deg;T. At what time and distance off will your vessel be when abeam of the light?

Accepted Answer

Option B: 2232, 3.4 miles. Standard bow-and-beam calculations determine distance off by multiplying vessel speed by time run between bearings when angles double relative to the heading. Computations confirm abeam occurs at 2232 at a safe passing distance of 3.4 miles.

Your vessel is on a course of 343&deg;T at 14 knots. At 2156 a light bears 320.5&deg;T, and at 2217 the light bears 298&deg;T. At what time and distance off will your vessel be when abeam of the light?

Your vessel is on a course of 343°T at 14 knots. At 2156 a light bears 320.5°T, and at 2217 the light bears 298°T. At what time and distance off will your vessel be when abeam of the light?