Salvage Phase News Today

Sediment is silt. >> reporter: the extreme conditions will test the limits of the u.s. navys blue fin 21 which is beginning the slow painstaking process of mapping the ocean floor. >> patience, people need to have patience. >> reporter: mark matthews says just one mission takes 24 hours, two hours down, 16 hour hs of scanning, two hours up, another four hours of downloading data from the side scan sonar which maps the oceans floor. >> you see the trace of the outlines of the objects. >> reporter...

>> reporter: the team also took the video of what this next step, the salvage phase would look like, underwater robots would pull small pieces of the plane up. a ship would have to hoist up any large pieces. >> bottom line, a very, very slow process. >> reporter: a process just beginning meaning mh370 families could wait months, even years for the answers and closure they so desperately need. carol, another interesting thing that the oceanographer told us is he would be very surprised if any deb...

Intense, it crushes a styrofoam cup to a fraction of its size. the missing plane is believed to be 4500 meters, nearly 15,000 feet down. >> its flat and the saidment is silt. >> reporter: this will test the limits of the bluefin 21. >> patience, people need to have patients. >> reporter: he says one mission takes 24 hours. four hours of scan is data from the ocean floor. >> you see the traces of the outlines of the objects. >> reporter: his team also took this video of what the next step, the sa...