Did some airplanes have battery backup before that?
It's my recollection of several crashes, where the plane is not immediately recoverable that there is always a concern that the black boxes will overwrite themselves.
It's my recollection of several crashes, where the plane is not immediately recoverable that there is always a concern that the black boxes will overwrite themselves.
The time period they record tends to be very short, but that does raise an interesting question, when do they stop recording?