Inside is a stack of memory chips designed to survive high temperatures , strong impact and tons of pressure . Maker of flight data recorder aboard aircraft has ` ` 100 % '' recovery rate . Top executive says finding flight data recorder could reveal cause of air crash . The wreckage believed to be on Atlantic seabed , around 4,500 meters deep . Japan 's underwater navigation beacon has limited battery life .
Maker of flight data recorder aboard aircraft has ` ` 100 % '' recovery rate . Top executive says finding flight data recorder could reveal cause of air crash . The wreckage believed to be on Atlantic seabed , around 4,500 meters deep . Japan 's underwater navigation beacon has limited battery life .