You are steaming on a course of 208°T at 21 knots. At 2019 you observe a lighthouse bearing 129°T. At 2030 the lighthouse bears 103°T. What is your distance off at the second bearing?

Question

You are steaming on a course of 208&deg;T at 21 knots. At 2019 you observe a lighthouse bearing 129&deg;T. At 2030 the lighthouse bears 103&deg;T. What is your distance off at the second bearing?

Accepted Answer

Option D: 8.6 miles. Applying the law of sines to the triangle formed by the two bearings and the distance run between them (3.85 miles at 21 knots for 11 minutes), the distance off at the second bearing is calculated as 8.6 miles, adhering to standard Bowditch principles for running fixes.

You are steaming on a course of 208&deg;T at 21 knots. At 2019 you observe a lighthouse bearing 129&deg;T. At 2030 the lighthouse bears 103&deg;T. What is your distance off at the second bearing?

You are steaming on a course of 208°T at 21 knots. At 2019 you observe a lighthouse bearing 129°T. At 2030 the lighthouse bears 103°T. What is your distance off at the second bearing?