Re: It is a salvage mission in international waters, China should take over the search
The Air France voice and data recorders were still readable. Those things are tough. And the physical positions of valves, guages and switches have often been vital in telling what happened. You can't assume there'll be no data. It's amazing how many crash results are worked out from partial data.
There's obviously a financial limit on what to spend. But it's worth spending a bit of time looking at drift patterns and seeing how they differ from our expectations, so we can refine our models an go back to a targetted search later.