Fact #2: All black box recorders transmit locator signals for at least 30 days after falling into the ocean Yet the black box from this particular incident hasn’t been detected at all. That’s why investigators are having such trouble finding it. Normally, they only need to “home in” on the black box transmitter signal. But in this case, the absence of a signal means the black box itself has vanished.
Posted on: Wed, 12 Mar 2014 09:34:49 +0000