Here is what I don't understand. The French had submarines looking for the wreckage, right? Submarines have all this high tech sonar systems designed to hunt for other subs. There is a black box, transmitting a ping out there, saying "find me", and they can't locate it?
Doesn't make any sense. They can find submarines that are trying not to be found, yet they can't locate a box that is begging to be found.