IF ONLY.......
Now that there are no more signals from the FDR/CVR, it seems that they won't be found for a very long time, if ever.
Surely there is a now a case to fit the FDRs and CVRs higher in the tail or rear bullet of ETOPS and LROPS over water flights that go outside radar coverage. They could be barostatically detached at a specified depth under water and fitted with a hi-vis, flotation device that has a solar-powered ELT. Regardless of cost this must surely be designable to avoid the anguish of the relatives after such an event.
The technology exists to also equip the kit with a simple gyro device which could show its postion of retrieval compared to that of release.
Or are we to assume that this was such a rare event that it is unlikely to ever happen again? Hmmmm.