CNN CNN Newsroom April 8, 2014 14:05:00
Pinging. and just pick up the signal is very complex. as you look at the water, you could be very close to where the pinger is and see no acoustic response and you could be further response and see a response. so the needle in the hay stack problem is really true. >> even though the search area has shrunk so much. rob, i wanted to ask you about that. they won't send a submarine down until the search area is narrowed further. right now eithit's the size of houston. you how small must it be? >> well, sonar, you know, the so he mar ussonar used to acquire f the sea floor can be deployed by an auv...
Source: archive.org