Re: Calculating true wind
Although there is not complete agreement is regarding usage, I believe that "true wind" is the wind that you would feel if drifting with the current. "Ground referenced wind' is the wind that you would feel if at anchor. Therefore, if you set aside leeway, the instruments can compute "true wind " velocity and direction with merely with velocity of the boat through the water, apparent wind speed, and apparent wind direction. Of course, the apparent wind and true wind are relative to the boat.