second subcoming down for the first sub and do that and the same thing from the air with the sea 130s and the poe sidon aircraft and one searches and comes back and another comes back, and they have searched massive areas, and the possibility that the sub is bobbing on the surface, but they are hoping to get to it, because they are running out of time. joining us is oceanography marine captain don walsh. thank you for being here, and i know that there is some beacon, but why isn t there something like a black box or something on the vehicle to help find the subme submersible? normally what we carry aboard a man submersible would be an accoustic beacon that can be