CNN Anderson Cooper 360 April 17, 2014 00:29:00
. well, as you know search teams in the indian ocean are using side scan sonar technology to map the ocean floor and look for possible debris. there are a lot of challenges, and as david gallo said, there are amazing challenges at such a depth. cnn's stephanie elam as more off the coast of california, to tell us how it works. so take us through it, stephanie, how does it work? >> reporter: anderson, it is really interesting, it sounds difficult, but the sonars are being used in the search for the missing plane, temll us how it works. >> right, there are a number of varieties. this is a multi...
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