Wildman & Russ

You guys might want to consider one of the new marine handhelds with DSC/GPS capability. They are compatable with the USCG's Rescue 21 system. A couple of years ago Sea Kayaker Magazine reviewed the two models that were then available with this capability. See http://seakayaker.us/a-review-of-two-dscgps-vhf-handhelds/

That review was from October 2010. Electronics changes fast, and there are now other models available with this capability.