CNN Wolf March 25, 2014 17:41:00
>> reporter: and how deep down can these go? >> these are pressure rated to go to the bottom of the ocean. so you can put things on a remotely operated vehicle that mayfly to the bottom or an autonomous vehicle. they're both able to do that. >> reporter: this is a hydrophone. that's where you would start if you're looking for the ping. let's say it gets to the situation where the ping has stopped, the batteries have run out. then they just have s.o.n.a.r. how does s.o.n.a.r. work? >> this is much different than the hydrophone. the hydrophone is just listening, where this is s.o.n.a.r., where t...
Source: archive.org