shawn pernicke used to be a commercial pilot, and captain chuck nash is a fox news contributor. general, good to see you all. let me start with you, dr. deal, the thought of going two and a half to three miles under the ocean to try to find bits and pieces that may or may not be there seems overwhelming. how do they start? >> well, that -- you're right, megyn, we've done it before. in the west end ocean we found a 747 south african air ways lost one back in '87. took them two years and they knew roughly where the aircraft was, but still they didn't get to it while the pingers were still operational. took them two years, they got one of the black boxes up and it answered the riddle. >> they call this body of ocean the roaring 40s because the seas are just so overwhelming. they talk about the seas getting sometimes up over 32 feet high. how are they even supposed to search out there? >> well, you're exactly right, extremely challenging, very adverse conditions, right? so part of this is using gps technology which is something that is far more accessible now than in some of the pas