Hi
I was reading the old report by BEA on the accident of Pan Am 816 back in 1977.
http://www.bea.aero/docspa/1973/n-pa...n-pa730722.pdf The second recommendation of the two given by BEA is that CVR:s and FDR:s should in the future be designed to eject from the aircraft and float in an accident. That was very many years ago, but nobody seems to have followed their safety recommendation. In my own field such behavior is regarded as almost criminal.
Regards