CNN Chicagoland March 17, 2014 05:50:00
This is not going to show up on some random fish-finder, you know, from some bertram going across fishing in the area. who has a receiver to hear these pings? >> well, agencies such as the navy, coast guard, et cetera, typically, can pick up on the signal, can either be done on the surface or by a towed array at a certain depth. >> how many receivers do you think are out there listening for a ping right now? is there any way to put a number on that? >> oh, gosh. >> ten, a dozen, a hundred? >> i ...
Source: archive.org