CNN Chicagoland April 11, 2014 05:36:00
These are called sona buoys. >> a sensor package that's parachuted out of the aircraft, floats on the surface of the ocean, and will deploy a hiredphone. >> once it hits the water's surface, it has saltwater switches that activate different deployments. everything in this canister starts to unwind. there's gear packed in nicely. some of it floats to the surface so there's a radio antenna that talks to the aircrafts or the buoy in the aircraft, they're constantly in communication. then the microphones, hydrophones are looking for the ping. this came from american manufacturers, sent a cargo pla...