CNN Anderson Cooper 360 March 26, 2014 00:23:00
Microphone. this is the type of device are going to be using either towed behind a boat in long tails or in order to listen for that underwater pinger. >> how far can it hear? how wide? >> only about five miles. >> so this is how you're trying to find the basic area of where any flat data recorder might be. >> exactly. you need to find the wreck site. >> so if we go from there, let's take a look at the sonar. because the sonar is what you're going to do if you get closer or if that battery dice on that flight data recorder. >> so this is an example of the sonar. the sonar is going to actively ...
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