Though you say the leeway is 4 degrees, it is much easier to identify the leeway as a vector (direction and speed). This vector can be expressed on the chart as a line showing how far the leeway would take you over an arbitrary lenth of time (say two hours); therefore, if the 22 knot wind and what ever associated current were to cause your vessel to move in a direction of 90 degrees at 1 knot, then you can plot a 2 nautical mile line from point A at 90 degrees to represent where you would end up by the "leeway". You can also plot a line for twelve nautical miles from A to B at 145 degrees to represent your intended path for the arbitrary 2 hours. If you were to determine the course direction from the end of the 2 mile line to the end of the 12 mile line; then, this would be the course to use that would correct for the leeway. I'm sure someone could explain this more clearly, Take care and joy, Aythya crew
