You are steering 143°T, and a light is picked up dead ahead at a distance of 18.2 miles at 2006. You change course to pass the light 5.5 miles off abeam to port. If you are making 14.5 knots, what is your ETA at a position 5.5 miles off the light?

Correct Answer: Option B — 2118

Using Bowditch chart work principles, the distance to run is derived from the Pythagorean theorem using initial distance (18.2 miles) and offset (5.5 miles). Dividing this hypotenuse by 14.5 knots gives the steaming time, resulting in an ETA of 2118.