Don't airliners have EPIRBs? I really don't know. But airliners, among others, are precisely what are supposed to pick up my beacon in case of disaster. So if this rig splashed, their EPIRB would go off, right?
*E mergency P ersonal I nternational R adio B eacon (or something real close). Little red thing, strobe on top'o'mine, too. Batteries supposed to last 72 hours.
They have the ELTs built into the cockpit of the aircraft that can be activated manually or by sudden deceleration.
There is another ELT built into each life raft that is activated when the raft is deployed.