with the ship on the surface one hour and 45 minutes into its descent on sunday. the other thing i heard was that p.h. had contacted the surface ship and said, there s a problem. we re dropping weights and surfacing immediately. i can t verify that. but that can mean something really happened very quickly. reporter: oceangate did not comment when asked about what gallo had heard. one senior navy official telling cnn it was on that same day, sunday, naval equipment detected an acoustic signature consistent with an implosion in the area where the titan went missing. but sound of the implosion was determined to be not definitive. if it wasn t definitive, they didn t report it because they were under scrutiny from different elements of the press. and they wanted to see if there were survivors underwater. reporter: so, the search continued, a massive international undertaking by sea
with no people inside, then you have some certainty that the vessel is going to be able to reach the pressures you intend to use it at because you ve already exceeded that. to be clear, though, in this case, the choice of carbon fiber for a life support system of this magnitude that was going to these kinds of depths is, in my opinion, always inappropriate, regardless of frequency of testing. we re hearing that more and more and from a lot of people. captain mclaren, i know you were good friends with p.h. nargeolet. what was he like? he s had an extraordinary career. oh, you know, he was he s the true explorer, undersea expert. you know, i had dinner with him in new york city just six weeks ago, and i asked him about he s still diving titanic. i thought he was using the
them. when the coast guard was asked earlier, they seemed to stop a lot of questions asked about themselves about what the nurses were. when it comes to the conditions and timeline that we re looking at, if you re operating off of what you heard from officials, less than a days worth of oxygen left in the summer supple, what other measures that the crew that your front ph, that this could take, that can stretch out what little supply that they do have left. p. h. is extremely experienced as a diver and scuba and summer institute. understand the importance of conservative era as much as possible, and he will try to get everyone to stay incredibly calm. i think working with that is the hypothermia. as we set, it s incredibly cold, so that might slow things down, as well. in my case, i would not think about the except to note that it is a race against yourself. we need to go full speed, regardless of what that time is and find that summer in. and, frankly, mathematically, it s going to
want and would be able to handle any kind of scenario you threw at them. so that s perhaps why we re optimistic and happy to keep hearing something banging down there, whether it is something else or them, this is something really experienced type of people like p.h., stockton, hamish, they would keep the search going and get as much evidence and clues as possible. risk and mitigation of risk are just important things for explorers. what s the mitigation of risk that takes place in a case like this, if this submersible has lost contact with its surface boat, but there is a letter that indicates that s happened in the past. what s the risk mitigation that would normally occur? what would the company be saying, hey, if we lose contact with this thing, what s supposed to happen? yeah, i mean typically if you
something else, but it is sounding manmade that they are trying to zero in on and that sliver of hope is where they are focusing on, and that submersible into a dive is taking eight hours to get down to the depth and it is going there now. and behind me is the atlantic king fisher and another ship that will take, we believe it is going to take a deepwater salvage gear sitting at the airport on the c-17 now, and big u.s. military cargo plane to get it down here to go down to the search area as well, and it is going to take a good 20 hours or so down there, and with regard to the oxygen, and yes, concerns about the carbon dioxide, and they have scrubbers on board, and if they can operate it, they can keep enough oxygen going, if they have the oxygen. and p.h. nargeolet is on board, and they say his first instinct