Patience has already run out long ago is the families of those on board the airliner. A group of families met again with airline and malaysian officials, the mother of a missing passenger is not happy. She says they keep telling her the same thing. Nothing useful. Its still an hour and a half until sunrise in perth, Western Australia, thats when search planes will take off once again on this the 37th day since flight 370 took off from malaysia and vanished. Well go straight to perth and cnns Michael Holmes. Hes there. What can we expect when the sun comes up . Were getting a sense and i think our viewers are probably getting a sense as well that were settling into a long, slow period in this search now. Reporter yeah. Youre absolutely right, jim. Yeah, those planes will be taking off in the next couple of hours. The first ones are normally the chinese planes. Theyre the ones that take off from Perth Airport and australian and new zealand planes will take off. Of course, the ships are still out there. Theyre out there 24 7 at the moment being resupplied by a u. S. Naval ship so they can stay out there and continue the search. You mentioned australias Prime Minister, tony abbott, yeah, repeating on saturday that he had a high degree of confidence, his words, that those acoustic sounds that they heard in the ocean are from at least one of the two black boxes from the missing plane. Did as you said predict also something that weve been saying for ages that even if those boxes are located, it just begins a massive, massive task of trying to get to them. He also mentioned those families as well and said that if they came to australia, they would be very welcomed. Have a listen. We would welcome whenever they wish families of the victims to come to australia, and they will find themselves in the arms of a welcoming friend. Reporter of course, thats the australian Prime Minister there. Ive been talking to some contacts of mine in the west Australian Government here, perth, and they were telling me, too, that they are already making plans for those families to come here at some point. When we dont know. Most likely when some sort of confirmation of wreckage or those black boxes is made, when the confirmation is made. They say that theyre going to have a Memorial Service here. Theyre going to provide for those families. Give them ose open arms. Theres even talk that there might be a permanent memorial placed here in Western Australia at some point in the future, jim . Michael, one question, now that there is concern that the pinger may have run out of batteries and they wont be able to hear the pings anymore, do they, then, switch to using the sonar where they are looking literally at the bottom of the ocean to try to find signs of wreckage . Reporter yeah, thats exactly what will happen. Theyve been waiting until the very last minute. Until they absolutely are sure that they wont get another ping, because, of course, the more pings they get, the more they can triangulate where they are coming from from the earlier pings and narrow down that search area as much as possible. The reason for that is the submersible, the blue fin, when it does go down and it has that side scan sonar and looks at the ocean floor, that thing is really slow. It moves literally at walking pace, so they want to make the search area as narrow as possible. When they have decided those batteries are gone now and that we wont get any more pings, thats when theyll put that down and theyll start what is a very slow, very tedious process of looking at the ocean bottom. Then if they find something theyve got to get other submersibles in that can do some sort of recovery work. They have different vehicles. So, tony abbotts right when he says this is a massive, massive operation that is very much far from over, jim. Yeah, no question, listening for those pings really just the first chapter and then you got to look for the wreckage and think about recovering the wreckage, thank you very much to Michael Holmes in perth, australia. I want to bring in our expert panel, miles obrien and aviation consultant and a commercial pilot Ken Christianson and a former ntsb chairman, and sonar expert arnold carr. I want to start with you, anthony, the pingers batteries are supposed to last 30 days, normally theres extra time built in, we may be reaching that point now. Do you think at this point really the last ping was heard i believe on tuesday, how much longer should search teams, is it worthwhile for search teams to keep on listening for those pings . I would continue to do so. The batteries dont die immediately. They die in a gradual sense. So, maybe they can triangulate a little further. Its really important to tighten up that area and make it as small as possible because as was previously just said, when you use the sonar, the sidescan sonar, which sweeps the bottom very effectively, its slow, its tedious. Yeah. Usually use the sonar first and we get the pings second. As you know. But were fortunate to have the pings at this point. As michael said, it goes at walking pace, madge walking an area the size of new mexico or arizona. I want to bring in miles in here if we can. Lets assume they have as many clues as theyre going to get as far as the pings are concerned. I guess you have four points separated by a dozen miles or so. We talk a lot about triangulation. Can you explain to our viewers how that process works and how much this information can really allow them to find i guess the crossing point where these various signals cross so that you can zero in as to where the black box is . My understanding the purest sense of the word is not triangulation, they are omnidirectional pings. You dont have a beacon you are homing in on. It goes in all directions. They go in all directions, what you are doing is tightening up the box, its just kind of a technical difference, but its tightening up the box. So as they go about that, that obviously eliminates the need for the autonomous underwater vehicle to map and look for the wreckage itself. When they get into that mode and decide no more pings, were talking about a long period of time to go through that process. Its six or seven times longer to cover any specific square foot of ocean bottom with the the uav as opposed to the device listens for the pingers. They want to use that potential of hearing things up as much as they can. Ken, i wonder if i can bring you in to describe it. Its onliny directional and it doesnt give you an exact point, but i imagine you particular leigh strength of the signal to guess which one is further away and can guess as to closer, zero in more on the area. But i also know that the signals are crumbed in effect by temperature in the water, current, depth, all this kind of stuff, so you also have to interpret you also have to correct for that as well. This is complicated business. Its complicated but the people who are doing it have the background. All the points you just made are very correct. Terrain just like a radar would bounce off a mountain, sonar acoustics will bounce off an underground mountain ranges under the water. And they allocate for the signal latency and the strength and they try to keep doing those routes over and over again and then they can get more of a pinpoint like miles was saying, reduce that area where they if they do have to put an underwater sonar in there, thats what theyll do. Its really comply kated. Mary, i wonder if i can bring you in. Mary, youve done a number of investigations for the ntsb. For the sake of our viewers, can you give just sort of an estimate what they should be prepared for, for how long this search goes now, right . You got some pings, right . Maybe your last pings. Then you got to go into a really slow sonar scanning and a slow recovery, assuming you find wreckage. What kind of time period are we talking about here . Well, ill give uf some examples based on previous accidents in the indian ocean and in the java sea over there, adam air went in the java sea and that was in january. They found the wreckage about three weeks later. But they didnt get the black boxes until august. Conversely, south African Airways went into the indian ocean, the black boxes were under 16,000 feet of water. They got one of them. They only found one, but they got it on the second day. So, the bottom line on those examples is it could be a very, very long time or they could get very fortunate. They could be literally use some algorithms on the pings to locate a spot and be right on top of it. But unfortunately theres a little bit of luck involved with a lot of algorithms and we wont know until they get down there looking how long it will take. It could take a long time. Credit where credit is due, its already been an incredible detective story where they found out where this plane went around. Thanks very much to the panel. There is no sign of the black box but Malaysian Police already say theyll need help opening it and decoding it if it is recovered. Well be live from kuala lumpur right after this. [ male announcer ] nearly 7 million clients. How did edward jones get so big . Let me just put this away. Could you teach our kids that trick . [ male announcer ] by not acting that way. Its how edward jones makes sense of investing. Without standard leather. You are feeling exhilarated with frontwheel drive. You are feeling powerful with a 4cylinder engine. [ male announcer ] open your eyes. To the 6cylinder, 8speed lexus gs. With more standard horsepower than any of its german competitors. This is a wakeup call. Welcome back. At this very moment ships are scouring the indian ocean for pings, if and its still a big if flight 370s black boxes are eventually recovered, it is still unclear who would control the delicate information inside. Malaysias government admits they dont have the knowhow to deal with the black boxes. Our joe johns has more from kuala lumpur. Reporter over two dozen countries have been involved in the search for the missing plane. Any hope of unraveling the mystery and the fate of its 239 passengers and crew is in two boxes, the flight and data recorders. We have very much narrowed down the search area and we are very confident that the signals that we are detecting are from the black box on mh370. Reporter if they find them, the question remains who gets the black boxes and who will lead the investigation to uncover what really happened to flight 370. Typically following a crash the country of origin for the airliner, in this case malaysia, is tasked with taking charge of the investigation. But malaysian authorities have already asked for help. We dont have the expert to open up the black box and to analyze what are the contents of the datas, the voice data and the flight data. We have to get experts to do it for us. Reporter the u. S. National Transportation Safety board and the British Air Accident Investigation Branch as well as Australian Authorities each have capabilities with sophisticated labs and technicians. But an International Working group of experts has also been suggested. If they are found, decoding the black boxes could be complicated. The boxes are built to withstand extreme conditions including fire and heat damage. But depending on the circumstances of the crash, memory chips extracted from the data recorders could still be damaged and might require cleaning until the raw data begins to paint a picture of what happened. We still dont know what condition theyre in. And theyve been sitting on the bottom of the ocean under extreme pressure for, you know, weeks, perhaps months by the time we get them up. The water could have caused some deterioration of the circuitry. You just need to be careful when you first download it, because if you screw it up, you may lose vital data. Reporter and time is now a vicious enemy. The batteries are starting to fade, and as a consequence, the signal is becoming weaker. I want to bring in joe johns, who is live in kuala lumpur, malaysia. Joe, as we know, weve reported on this a lot, malaysia is taking a lot of heat for its handling of the investigation across the board. Who would they trust with the black box data . You have a Real International coalition of countries joining the investigation there. Reporter jim, the truth is, from what i can tell, the malaysians have not expressed a preference among those countries i mentioned, the united states, the uk, and australia. We also know this has been a very collaborative effort throughout, with many nations involved in the search. The malaysians have also been very careful to try to include malaysia which is a country they want to maintain good relationships with, and as you know, jim, more than half of the passengers on the plane were from china. All right, well, its going to be the next step, lets just hope they find the black boxes if they get to that step. The malaysian government keeps contradicting some of its own information. Ten days ago the Police Inspector general said all 227 passengers had been cleared in the investigation, but now malaysian investigators appear pe backtracking, and said that everyone on board remains under suspicion. I want to bring the expert panel in, mary, if i can start with you first, is there any reason why the passengers should again be under suspicion or are they trying to cover their bases here, because they still dont know what happened to this plane . I think theyre just responding to the national or the International Criticism that they cleared 237 people in a week. And i think skeptics kind of worldwide said, well, thats just not possible. So, they now say, well, theyre not cleared and theyre under suspicion or suspects. I really think it was just a matter of covering their own, you know, poorly worded initial announcement. I dont think it really signals that they have additional suspects. Miles, as you look, youve been following the ins and outs of this investigation from the beginning, and we talked about, its a dual investigation so you dont want to beat up malaysian investigators too much. As youve watched this, have you seen them Getting Better at this . More transparent, more thorough . Not so much. What i see is a lot of inconsistencies, a lot of backtracking, a lot of flipflopping. At the time they cleared magically cleared 237 people, there was a lot of focus among the Investigative Team on the flight crew in particular the captain. It seemed as if they were rushing to impugn him. And, you know, its thats you know, the pilot, the flight crew is the proverbial butler in these cases, you know, its very simple to blame the flight crew and, you know, and then off you go and we can be done with this investigation. Well, you know, to imagine that 237 people could be completely cleared in that period of time, theres no way that could be possible. We know that. So, the real question is are they really investigating them or not . And we dont know because the investigation hack opaque from the beginning. There has to be an element they havent turned anything up, right . They have to go back over. I wonder, ken, youve been watching this, too and miles mentions the focus on the pilot, theres a reason for that because they in the cockpit. But do you think the investigation was their to the cockpit . Initially it wasnt. Now they are backtracking. I agree with miles. Now they are looking at them again. They didnt get anything substantive out of the Flight Simulator from his residence and thats very typical that some pilots would have that in their residence. Also not like u. S. Pilots but pilots overseas will get some currency training on that instead of going to a larger simulator. Thats a little bit different from how western pilots would fly. Some of the other pife lots that weve used as analysts here have mentioned to me they have simulators on their home computers, they showed me how easy it was, you buy a dvd and pop it in and you have a simulated. Although his was a little bit more complicated. Arnold, if we can bring you in, i know we talked about the pings. I know there would be great interest and value in finding another ping, but as you reach day 37 how much longer is it worthwhile for that search to continue as much as youd like that extra ping before you make a switch to a sonar search which as we made the point on the air is a much slower process . It appears that the signals are getting weaker, so i would expect maybe just a few days more from what i hear. I would like to comment a little bit on triangulation. If you remember the chinese working with some handheld devices in shallow water, those are unidirectional. They can really get into a point where the black boxes and the pingers are. When you get into this deep water, youre really looking at omnidirectional, meaning devices that listen for the ping but cant discriminate exactly which direction. So, in this case, what youre doing is youre really looking at the intensity of the ping to try to really relate it down to distance. Got you. Just another step in whats already been a difficult investigation. Thanks very much, arnold carr, miles obrien, Ken Christianson and mary schiavo. And the escalating crisis facing russia right after this. Growth is gratifying. Goal is to grow. Gotta get greater growth. Growth . Growth. I just talked to ups. Theyve got a lot of great ideas. Like smart pick ups. Theyll only show up when you print a label and its automatic. We save time and money. Time . Money . Time and money. Awesome. Awesome awesome awesome awesome awesome awesome awesome all awesome i love logistics. Oh no. Who are you . Daddy, this is blair, he booked this room with priceline express deals and saved a ton. I got everything i wanted. I always do. He seemed nice. [ banker ] sydney needed some Financial Guidance so she could take her dream to the next level. So we talked about her options. Her valuable assets were staying. And selling her car wouldnt fly. We helped sydney manage her debt and prioritize her goals, so she could really turn up the volume on her dreams today. And tomorrow. So lets see what we can do about that. Remodel. Motorcycle. [ female announcer ] some questions take more than a bank. They take a banker. Make a my financial priorities appointment today. Because when people talk, great things happen. Well get right back to our continuing coverage of the hunt for flight 370 in just a few minutes, first, though, heres a few other s