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down into the indian ocean. they can receive and send signals and today one of these buoys sent a signal back up that may have originated from flight 370s black boxes. we have signals from saturday, signals from yesterday and another possible signal today. the search could be getting warmer. so welcome. we are all learning here, new terminology talking about the locator, and that's how they detected some of the other possible pings. >> the navy has been using these for a really long time. i think they are a product of the cold war. they are a real efficient way to get a large area coverage.
SignalSignalsBuoysIndian-oceanFlight-370s-black-boxesOne370SearchLearningPingsLocatorTerminology