Once search crews zero in on Flight 370's location, the hope is sonar 'pings' will lead them to the plane's black boxes. But there are several factors that seriously complicate that effort. Safety analyst David Soucie demonstrates how a sonar 'pinger' works and what it sounds like.
You must be logged in to post a comment.
Anderson Cooper goes beyond the headlines to tell stories from many points of view, so you can make up your own mind about the news. Tune in weeknights at 8 and 10 ET on CNN.
Questions or comments? Send an email
Want to know more? Go behind the scenes with AC361°