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But overall we've had a very good success rate with water recovery. >> reporter: have you ever not got end data in a water recovery? >> i can't think of one. >> reporter: recorders found in saltwater are first bathed in fresh water and later carefully dried and taken apart to reveal this. the device's memory card. even a damaged card can be useful says recorder engineer aaron. >> the data jumps from chip to chip. even if you have one corrupt chip because it's cracked or some sort of corrosion on it we should be able to build the information back. >> reporter: information from the flight data r...

In a water recovery? >> i can't think of one. >> reporter: recorders found in salt water are first bathed in fresh water and later carefully dried and taken apart to reveal this. the device's memory card. even a damaged card can be useful, says recorder engineer erin gormley. >> it does jump from clhip to chip. even if you with have one cracked we should still be able to built the information back. >> reporter: information from the flight data recorder's memory card which keeps track of data like the plane's pitch, altitude and speed is downloaded on to a computer system where teams make sense...