Flight 370 may have taken a route into the indian ocean after it made the baffling turn. This flight path taken around indonesia and raises the possibility the aircraft was being piloted or programmed to avoid radar. Like Everything Else so far these latest leads are tantalizing. Reporter after weeks scouring the indian ocean, this is the best lead yet in the desperate search from malaysian flight 370. Its been detected signals consistent with those emitted by aircraft black box. Reporter this is the remote area nearly 1,000 miles off the western coast of australia where Officials Say two sets of electronic pings were detected by an australian ship. The pings were heard in waters that are nearly 15,000 feet deep. Or more than 4,000 meters down. The first pings lasted more than two hours, the second just 30 minutes. But could they be from the ship . To find out, rescuers have this robotic submarine with cameras attached on board. Which can be deployed in hopes it can get a visual. Essentially this is being done without finding any wreckage thus far, and i think its quite, quite extraordinary and while i would like to see now us find some wreckage because that will, that will basically help solve the mystery. Reporter but the pings picked up by the australians werent the only ones detected. A chinese ship said it too briefly detected electronic pulses. But those came from a different search area all together, 300 nautical miles from the australian find. Chinese television showed images of the crew using a basic sonar device on a small rubber boat to pick up sounds. Given the distance between the two locations could both be from flight 370, australian Officials Say its possible but unlikely. A new potential flight path only complicates the picture. A senior malaysian government source telling cnn the aircraft skirted indonesian airspace as it veered off course saying the plane may have taken a route designed to avoid radar detection. So, while objects are also spotted on saturday by Chinese Air Force search plane has there been any verify occasion whether the objects might have been the right ones . Reporter no there hasnt been. They havent given up any search for debris. But since the chinese issued those photographs and announced they found those white objects or spotted them from one of their aircraft, nothing else has been heard. Weve seen a lot of debris thats been spotted and ruled out. We saw ocean tankers, and things that end up in the indian ocean because of the currents. This may fall into that category. Certainly they dont seem to be a focus of the search at this point. Matthew, thanks very much. The process now centers on listening for trying to reacquire the source of those two hours and 13 minutes of pinging noises. Doing that before launching a much longer effort of taking sonar pictures mile by mile of the ocean bottom. We want to give you and explanation of whats going on. We go commander william marks. Commander correct me if im wrong its my understanding on sunday over the course of the two hours, the pings got stronger then weaker. Did that mean the ship was closer and then farther away. At that point those were very encouraging signs and now were being more optimistic. Then a couple of pings gave us some optimism. First, that the signals did get stronger and stronger and then we crossed where we thought was the line to it and then it got weaker and weaker. Thats consistent with how you would expect it to be when you get closer to the signal, then you pass it and then you get further away. When that happens thats encouraging. What you do is you do a very slow turn and you get on that course and do it again. Hopefully you get, still get a strong signal and you get another set of lines of bearings and where those cross that gives the location. So what was the good news is we had about two solid hours of coverage on the one course. Then we did a slow deliberate turn to get on the reciprocal course. We added almost another 15 minutes and thats when we lost the signal. So we were in the process of getting a good triangulation when we lost the signal. You dont want to make a mistake on this. Is there any other truly feasible explanation for two hours and 13 minutes worth of pings. It could be a whale, Something Like that . Is it feasible for that length of time . Were thinking the same thing. Why would you have two hours of coverage, turn the ship around on the reciprocal course and have another 15 minutes of coverage. Where does that go . The way i look at it, its not so much a surprise that we havent required it, its a surprise that we even acquired it at all. To give you a little bit of timeline perspective, if we dont have a good location from the black boxes, the search would be by sonar. Its not a matter of days. Were talking months. Could even be years potentially. Would you have a recommendation and if you would, are you comfortable saying what it would be in terms of a timeline . You know, i think were not in a rush to get the sonar going. You know, theres a potential that the battery can go on for another couple of days, really, can even go on for another week or so. You really dont know. And then once you take your locator out and once you stop using it and that black box is no longer pinging its pretty much done. So, the time to maximize the effectiveness of the cpl is right now. I dont think were in quite a rush to get that out of the water and get the sonar in the water. When we do search with the sonar, theres really no limit to how long that can keep going. It just takes pictures of the ocean floor. Appreciate talking to you. Thank you. Thank you. Lets bring in our panel, miles obrien, david gallow and aviation correspondent richard quest. Richard, is this the best lead that there has been in this entire four weeks . Absolutely. No question about it. Just lutzen to Angus Houston last night. Very promising. The best lead we got. Whichever way you cut it what they are dealing with now is the only lead that theyve got as it has been throughout youre zeroing in on this one search area. The northern part of the southern corridor. They know that from the inmarsat data, all the work thats been done by that International Working group on the hand shake. You got a series of hands have come together. Weve talked about this jigsaw so often. The problem is that piece keeps falling on the floor and you cant keep finding it and the real risk sof course, it might be too late and then youre in for this long hard sloth of searching the ocean. What i dont understand if they already have, you know, more than two hours of these pings that went up in volume and then reduced in volume which indicated they were getting closer then farther away they have a sense of the coordinates of this. If they dont find, hear any more pings dont they have good enough location that they can send in these under water vehicles . Already, anderson they cut down the size of the haystack to something manageable. What they would like to do is get it down even further. Like commander marks says they dont want to waste time while the battery is still operating. You just talked about this before how the ocean can play tricks on you with sounds. Realistically, is there any chance this is a whale . Any chance this is a natural phenomenon . I have some friends that say its possible, some biologic noise. Its not impossible that its biologic noise. Also underwater vulcanism in that area. Its a very volcanic area. Theres hot vent, underwater geisers. None fit exactly. The best possible fit is the pingers on the black boxes. Its incredible to me they might have found the black boxes but yet not a sled of debris has been found thats been confirmed to be from this plane. Do you know of any other cases where thats happened . No. This is the complete backward scenario that we would have expected. We would have expected to see a floating seat cushion and then we would have had oceanographers figure out where it came from. Its extraordinary they stumbled upon this pinging. This is a testament to the clever engineering that folks at inmarsat Satellite Company were able to do in creating tracking information from a satellite which is not designed to provide tracking information. It just so happens one of these arcs they drew, last reported communication with the satellite is right you can see it there, that red line is right over the spot where they are hearing the pinging. This is lucky but also, you know, luck that is based on an amazing piece of engineering. Richard, the pings heard reportedly by the chinese vessel over the weekend some more than 300 miles from where the navy is looking, is it possible that they are actually related . No. Well unlikely . The Angus Houston said it is unlikely. Hes being diplomatic. Every expert ive spoken to says, no. I guess we can create a scenario that has those pings relevant. But we could also create a scenario in the world of fantasy. And at the moment we have to sort of basically call it as it seems to be. What the experts are saying no. Unless any of my colleagues, miles or david want to put their neck out in the opposite direction i would say its not relevant. Miles, you agree with that . I think its a red herring, anderson. As much as anything that was a little handout after all they had the cameras there. That was a piece of photo opportunity to send some images back to china to let people know they are doing their best to do some searching. What they heard is a different matter. They had a pinger aboard that vessel which helped them test their vessel. But youre not supposed to put it on the boat when do you a real search because you could end up hearing yourself. Just looking at it sharing the iphone buds and the pole, given the relative sophistication we have to defer to the ocean shield. Well take a quick break. Well have more. How much longer can the pingers last . Well go straight to the source on that. As soon as it hits the water it starts pinging. Its designed that way. Also ahead i want to take you back into the simulator to explore this idea the 777 was on a course to deliberately avoid radar coverage. Does that automatically mean that there was a human at the controls of this plane . Well be right back. I dbefore i dosearch any projects on my home. I love my contractor, and i am so thankful to angies list for bringing us together. Find out why more than two million members count on angies list. Angies list reviews you can trust. Ameriprise asked people a simple question can you keep your lifestyle in retirement . I dont want to think about the alternative. I dont even know how to answer that. I mean, no one knows how long their money is going to last. I try not to worry, but you worry. What happens when your paychecks stop . Because everyone has retirement questions. Ameriprise created the exclusive confident retirement approach. To get the real answers you need. Start building your confident retirement today. Abe get in punch it [ male announcer ] let quicken loans help you save your money with a mortgage thats engineered to amaze. But add brand new belongings from nationwide insurance. And well replace destroyed or stolen items with brandnew versions. We take care of the heat, so you dont get burned. Just another way we put members first, because we dont have shareholders. Join the nation. Nationwide is on your side our breaking news. Todays search area is dramatically narrowing. Crews racing to hear what they heard over the weekend. What were talking about is a lot of the technology for picking up these pings, things like the toe pinger locator, hydro phones, passive sonar, all hitech ears for picking up certain noises underwater. Well take a look at the noise makers. Well find out how they work and what they sound like. Reporter if search teams in the indian ocean are hot on the trail of flight 370 black box this man would know it. Hes president of the largest manufacturer of black box pingers. Its activated by this water switch. On this side is the battery. Reporter he invited us to see where they turn out these black boxes. He believes it was one of thinks teams pingers on the flight. Authorities allowed him to listen to the pinger sounds just detected over the weekend. You actually heard the pinger sound that the ship picked up . They sent us some data. Reporter how did it sound is now like one of our pings. Reporter what does it sound like . Listen. So its stant. As soon as it hits the water it starts pinging. It doesnt take a lot of water to start pinging. Its designed that way. Reporter if this were in an airplane and hit the ocean this would start immediately this pinging sound. If it was not damaged in the incident you saw how quickly it began to ping. Reporter in perfect conditions the pingers pulse can travel 2 1 2 nautical miles. Cliffs and vegetation can get in the way limiting that distance. Before any beacon is shipped from here its sound output is measured in one of these huge 50,000 gallon tanks. Its lowered into the tank through the floor above. Surround by hydrophones, ultrasonic readings are recorded on this computer. This pinger is twa flight 800 which went off the coast of new york back in 1996. This company made the pinger. After it was recover they got it back. This one was found in Shallow Water but they are designed to function in water as deep as 20,000 feet. What about the frequency . Crews at sea picked up a slightly lower frequency than the pingers standard frequency of 37. 5 kilohertz. Water temperature can shift the frequency. Its so distinct, right . Theres nothing else that would sound like this with this frequency. 37. 5 kilohertz was selected because it is unique from the background noise in the ocean. Randy joins us now. Youve been working with these beacons all day. How much water does it need be in before it starts pinging . Reporter they can survive in depths of 20,000 feet. What we want to show you tonight is how sensitive they are. We have this tin cup here. It has a moist paper towel in it. No water in it. This is one of the pingers. We have the tester right here. Ill be quiet for a moment as we put this in and just with a moisture paper towel listen to it activate right away. [ pinging sounds ] you hear that right away. It starts to work. We also want to tell you tonight we talked to the people here who make these and said we talked a lot about the 30 day deadline for the battery to run out because it only lasts 30 days. They said theres a three to five day grace period so that was good news we may have a few extra days. They talked about the fact and they want to make this point just because they think they heard this sound from one of their pingers down toings it doesnt mean that the plane or pinger is right there. It radiates so widely. It could be far, far away. So they will have to narrow down the search area these search teams to try to fine it. I appreciate the demonstration. I want to bring back david gallow. And former Department Department of transportation inspector. You believe these pings are from black boxes. Is there too much evidence for it to be anything else . Absolutely. Without a question in my mind they are. Especially since weve gotten it from source we have. The china didnt seem very credible to me because of the equipment they were using and highly possible they were doing some testing on the pinger. I didnt give that a lot of credibility. Now we got it from this machine from that pinger locator im very confident. David, even though the frequency that they heard was slightly different than the normal frequency for these . Well, yeah. Remember that there are 37. 5, but even at manufactured they have a tolerance level of one frequency, one kilohertz. So, we got that to think about. In addition as the battery gets lower its potential, has potential for reducing the frequency sound as it relates to the decibels, 160 decibels but as they decrease, they can actually play with the frequency that comes off of it. Theres just nothing in that range especially something that would be clicking every Second Library that. Just nothing in the Natural Environment that would create anything even similar to that. David gallow, lets assume they dont hear any more pings. They just have the pings they got on sunday. Randy said these can be heard for two plus miles. To a layman that doesnt seem like a huge amount of area to cover with sonar under the water, with side scanning sonar and underwater vehicles. Is that naive to think that . No, its not naive to think that. Seems like a small amount. Under the sea theres no gps navigation. Its pitch black. Fairly hostile environment. Where they are working right now is on the north facing side of an underwater feature called the wallabe plateau. That place will be covered with land slides and steep cliffs. Working in that area even though its a limited haystack is less than easy. It will be fairly tricky. On air France Flight 447, david, you had a general idea where the plane went down. You found debris, the pingers on the black boxes never worked. Still took you months and months of searching over two years to find the wreckage, correct . Took two years with all the mobilization and things like that to get back out there but all together on the water about ten weeks. Actually two months of that, eight weeks was spent almost on a wild goose chase because of a bad model for retrodrifting. So drifting debris backwards took us to a bad place. You know, its definitely doable. The team out there, Phoenix International are superb at locating black box. So thats interesting, david. Youre saying really on the time on the actual water was ten weeks to actually find the wreckage from the time you found the debris, not including all the bureaucratic Time Spent Getting approvals, getting permission and the like. Took a year to get out there after the tragedy. We spent two months that first year in the wrong part of a haystack being led there by the retrodrift models that put us out there. Took us another year to get out there. Within it a days during that second phase we located the aircraft. Thats interesting. A lot of people focus on that two year search but a lot of that is bureaucratic delays. The fact that no debris has been found. Does it tell you something about the way the plane may have entered the water . Well it can. It also may say that its been so long that the debris was out there and storms have come through that the debris that did float has gone away. But, you know, in historic accidents there are cases where planes have gone down and remained largely intact. Usually they are like military planes, some world war ii planes that were found largely intact and light planes. Light planes go down, land on the water, dont break up and sink. But big aircraft like a 777, its very hard to bring them down and theres been cases where they intentionally tried to lan