CNN New Day March 21, 2014 10:11:00
>> trying to determine where it is underneath the surface. you can't hear in the water when you're flying over. what you do you take it, you see the guy chucking it out of the plane. what that does, lands in the water. you've got hydrofoam in that tube which is listening. it can then radio up to the airplane circling overhead what it's hearing. again, this thing is on the surface because it needs to listen in the water and broadcast up. so if this thing is lets say three miles down and the pinger is only loud enough to be detected from two miles away, you're at a lock. >> something i've been a...