I've recommended, and been quite happy with, the Uniden MHS75 in the past. They're not crazy expensive and waterproof. They advertise as floating... I actually had one turn upside down on its clip without securing the lanyard, and it sank to the bottom out at San Clemente
![Smile](http://www.bigwatersedge.com/bwevb/images/smilies/smile.gif)
The company was actually cool enough to send me one for free just for asking.