Thanks for all of the great info. I also volunteer and do a lot of adaptive ski clinics for those who might be amputees, para/quadriplegic, autism and many other adversities. and while skiing with these people were being "drug" through water at sometimes 12 to 15 mph (on two skis of course. and we do have the old wooden show skis to help float a little better) on either side of an specially designed ski for the participant. and at those speeds fatigue really takes part after multiple pulls! Sooo again thanks for all of the great advice!!
Happy Skiing!
Ted