Very choppy today and too much North-West to go down wind in the flater area (just behind the wave of Punta Elena-Rocky Point).

I´m checking if GT31 and GW52 give you the same avg. My theory is GW52 give you a bit better avg speed because is able to position you five times in one second and GT31 only give your position once every second; as our aceleration in windsurfing board is not constant the more accurate is the gps-machine the better is your avg speed, because is more near to the reality. It sounds logical but I would like to check if it is true and that case how much it represent for your outcome.

Will see...