Thank you Gents, I appreciate you assistance.
I wasn't expecting such a prompt response!
Next question, does anyone know roughly what true wind strength would be required to get the boat going 5 knots (5.75 mph)?
Cheers
Anthony

Dear All, I'm doing some research on the speed and performance of the S15 and I wondered whether in this technological age, anyone had GPS speed over ground data, preferably with known true wind and rough current data for the S15 in Unirig or Sprint modes? Alternatively, can the average and max spee...