do they have the know how to pull off a recovery like this? there are still questions about the location of all the debris. >> seems like a small body of water. >> david gallow. >> usually you're extremely careful not to say that you found something until you ground truth it. >> he participated in the recovery effort in the crash of air france flight 447 off brazil's northeastern coast. the black boxes took almost two years to recover. footnoting what a painstaking process this can be. joe johns, cnn, washington. >> we have david gallo of the oceanographic institution us with now. david, you know, the poor visibility, strong currents and the java sea. weather is better today but not great. it is causing so much of a problem to find what is left of this plane. how much more difficult does it become as the days go on and on to find maybe the smaller pieces of this plane? >> sure. for the families involved, it's