I read that the French are now saying that the data recorders may never be found.
With the availability of modern satellite and data transmittion technology, the possibility of continual tx of FDR information should be possible. Given how essential that data is in understanding the causes of an accident perhaps this should be considered by the powers that be for A/C crossing deep oceans.
I know it would be costly, but then again so is the recovery of sunken black boxes.