Yes, they make many personal EPIRBs or emergency radio beacons (short range though) http://www.bing.com/search?q=personal+epirb&src=IE-SearchBox&FORM=IENTSR ht

Yes, they make many personal EPIRBs or emergency radio beacons (short range though) http://www.bing.com/search?q=personal+epirb&src=IE-SearchBox&FORM=IENTSR http://www.bing.com/search?q=personal+epirb&src=IE-SearchBox... They also make EPIRBS that activate automatically when submerged in water.