Your ship is proceeding on course 320°T at a speed of 25 knots. The apparent wind is from 30° off the starboard bow, speed 32 knots. What is the relative direction, true direction and speed of the true wind?

Correct Answer: Option B — Relative 80°, true 040°T, 16.2 knots

Solving the wind vector triangle using true ship velocity and apparent wind vector yields true wind parameters. Vector subtraction of ship course 320T at 25 knots from apparent wind (30 off starboard bow, 32 knots) calculates true wind direction at 040T and speed at 16.2 knots.