I apologise if this has been discussed previously. It has been commented on that needing the retrieve 'black boxes' from burnout wrecks in inhospitable places, or from the bottom of oceans, in 21st century seems very old tech. This scenario seems a case in point. AF447 was sending ACARS data back to base, as was the QA A380 with its engine blow up. Is there enough satellite data storage for every a/c to send back FDR/CVR data in live time? The data could be overwritten every 60/90/120mins, what ever is decided by the authorities. There would, of course, be confidentiality protocols as per OFDM's. All modern jets have GPS nav systems. Why not install at manufacture a satellite data transmitter; mandatory to counter those cost cutters. I'm sure it would not be expensive with economy of scale. What has been the cost of searching for; Air India in the Atlantic, AF447, MH370, many others & now this Egypt air?