I own a Foretrex 201 and I use it for cat sailing as well as windsurfing. It works great and has all the features I want. While windsurfing it gets submerged quite a bit. If you submerge it repeatedly it will stop working. I have gone most of a season before it quite but it will die eventually. <img src="http://www.catsailor.com/forums/images/graemlins/frown.gif" alt="" /> Now I am careful not to submerge it too much and I have no problems on the boat since I don't capsize very often. Getting it sprayed with water on the boat does not seem to hurt it.