You are underway on course 315°T at 14 knots. The current is 135°T at 1.9 knots. What is the course being made good?

Correct Answer: Option A — 315°T

The current (135°T) is exactly reciprocal to the ship's course (315°T). Because the current is acting directly against the vessel's heading, the course made good remains identical to the course steered, 315°T. This is a standard application of vector analysis in Bowditch.