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Manipulators. >> it has jaws, open and close the jaws. >> reporter: they are essentially mechanical hands able to retrieve objects from the ocean floor and deeper than any human could withstand. >> the retract. >> reporter: a second manipulator can be equipped with tools for cutting through metal such as on the fusage of a plane. >> look for a black box, not a problem at all for me to pick it up and put it in a basket and recover it back to the vessel. >> reporter: experts say top priority for i...