so the cvr was all clean. and we didn't have anything in the crash sequence. nothing because the cvr had stopped. >> but up until that point, you heard what happened, right, until the pilot pulled. >> exactly. >> it was a different aircraft, mary, correct? >> right. 37. it was a 37. >> you can actually shut it off. is mikey k. there? how are you doing, michael. i have a question from a viewer. mikey kay is a cnn aviation analyst with us. here is what dan wants to know. can a magnetometer be used to help find the fuselage of a missing plane? >> magnetometer, if that is a mag boom type of situation which is a magnetic anomaly detector, then that's exactly what the p-3 orion uses to detect submarines just under the surface of the ocean. i think these types of equipments and technologies are optimized for submarines. they're not optimized to find aircraft or debris that have crashed into the ocean. it all depends really on what the material is that you're looking for. if you're looking for a ferrous piece of metal, you might be able to pick something up. but if it

the cvr and the fdr? >> so we've heard similar frequencies, but different locations. so that we believe could have been an indication of two separate beacons. >> got it. we got you. thank you. how far apart? >> that i don't know. >> don't know. commander, thank you very much. breaking news. that's all i'll say. we have to take a break here. the most encouraging news we've had since this plane went missing. you do not want to tune away. we're going have more coming right after this short break. four-wheel steering is why i get up in the morning. [ matt ] the only thing better than the smell of fresh-cut grass is the smell of perfectly level, fresh-cut grass. that yellow seat's my favorite chair. [ kathleen ] you want to find a john deere dealer? just set your gps to tractor expert. [ jim ] when my grandson grows up, it's his. but it's all mine now. [ male announcer ] that's how we run, and nothing runs like a deere. now get $400 off all john deere four-wheel-steer lawn tractors at a dealer near you. but they have to use special care in keeping the denture clean. dentur

>> paul, is it important to know what box or what the cvr, the dvdr that has the pingers attached tohich one is which in order to locate this signal? >> well, they have to know what to be listening for. it's like trying to listen for extra terrestrial life. you have to know which direction to point your antenna. which frequency range to listen on. what the duration would be. whether or not what you're receiving is noise or is, in fact, what you're looking for. and the manufacturer as well as the installation and operation can no doubt tell you exactly how each of these was programmed. >> are they all 37.5? >> i believe it's programmable. >> okay. >> rob mccallum, you have a question for paul? or anything you want to add? >> i'd like him to comment, really, in that, you know, pingers are used widely in the deep water industry for relocating science packages that are left on the sea floor and need to be retrieved later or retrieving fishing gear. anything you really need to get back to that exact spot you put a pinger on it and come back later. do you have any comment, paul, on how far

noises that we would hear from two black boxes and that is obviously the cockpit voice recorder, the cvrnd the flight data recorder, the fdr, because this information and the signals are so unique to what it is that we are looking for under pinned by the unique analysis from the satellite and the intellectual horse power that went in to that, i think we are now in a very credible position to be able to start, you know, really zoning in on this, this location and hoping for the best. >> that was michael kay, speaking to myself and rosemary church earlier, as we have been reporting, it's been a agonizing month for the families and relatives of those that were on the flight mh-370. pauline, talk to me how the families are responding to the new development and what they have planned for what is now the one month anniversary of this plane going missing? >> sure, errol. well, as a general sent iment, they are approaching it with a lot of caution, they have been disappointed so many times with false leads. one woman whose husband is on the plane said she has no reaction until she sees physical

for me that leaves a lot of open questions that i'm actually not sure the fdr and the cvr might answers best case scenario but the wreckage could allude to a lot more, i think. that's going to be an impossible task to salvage that. >> mary, was a twa flight 800 and you mentioned another crash not in the too distant past that where they had to reassemble the aircraft to get the information from it. >> well, the big reassemble was twa 800 because the flight data recorder and the cockpit voice recorder combined, they just didn't contain the clues. all there was was a very loud noise at the end of the tape. that's because the explosion ripped all the wires, just ripped the plane apart. and there was no more transmission. so it was -- it was an investigation need-based reason to put that plane back together. it was largely put back together. it was quite a sight to see. it's a training tool now in virginia. >> les? >> i think mary would agree with me. it depends on what the flight data recorder shows us. it shows us enough evidence we have a definitive idea of the cause, great. otherwise we

having cvr data at that point when it initially diverted from its track to beijing, i think that willg that is -- >> now, the data recorders though would go back further than two hours. you would get a complete picture of data from those recorders. >> 25 hours. >> yes. it would encompass the entire flight. >> now, david, with air france, those data recorders and cockpit voice orders were in the water for two years. >> they were. >> in sea t water and depth. >> we looked every day waiting to get out there because we had no idea how long that they would be protected against the environment of the ocean. so we were very surprised that all of the information was still there. >> and was there any -- >> the others were fine. there was a little bit but the data was fine in both. >> that's encouraging. >> bobby, if you're still there listening to us from afar, when you hear about these developments and you've done a lot of time searching at great depths, what particular challenges come to mind for you? >> well, you know, i understand what you're talking about with the finding the cockpit data

. >> caller: i would like to know what you think of the stock cvr findings. >> it's kind of a not greatefiner frankly. i've been recommending holly frontier but them the day before they report because this may be a peak quarter. let's go to craig in pennsylvania. craig? >> caller: booyah, my man. how are you doing? i was calling about gwph. >> they had a bad reversal today and this has become -- we went -- we went anti-speculation at the opening. that's what happened. gw pharma ended up big after morgan stanley recommended it. let them come in a little bit. this is the only cannabis stock i have supported. mark in california. mark? >> caller: jim, thanks for taking the call. question about two bioteches, isis and tang gamo. >> isis has a very good product portfolio. we like it but seng guam mow we're not as crazy about. when celgene doesn't go up. when gilead doesn't go up these can't go up. these are hostage to the big invest and the big invest aren't going higher. and, that ladies and gentlemen, is the conclusion of the lightning round! ♪ [ bell ringing, applause ] five tech stocks wi

and that is the black box and fdr and cvr.understanding being drawn up right now as to who would handle the processing of that data. would it be the ntsb, the aaib or the australian. >> i have to go to david. pete meyer says a lot of questions on the show seem to assume the black boxes are sitting on the ocean floor or buried in the silt. wouldn't they still be inside the fuselage? >> absolutely. that's right. if we have given that impression or if i have it is incorrect. it should be and probably will be surrounded by and very difficult to extract from the wreckage itself. >> this is a question from john for arthur rosenberg. it seems very lucky that the first ping we heard was so quick. now no wreckage top or bottom. time to show all info? >> absolutely. it's time for the malaysians to come clean. it's time for us to have a little more detail on virtually every aspect of this investigation. it would only help the families. >> jeff, you will like this one. it's about the northern route. it's from amanda. amanda says, have any

the cvr records the last two hours. the flight data recorder records weeks.t has every input. whatever is done in the control room. 10,000 parameters are monitored from engines -- >> from that will you be able to tell if the aircraft was under human control? >> oh, absolutely, because you will see the measures that were taken and it will tell you which side did it. was it the left-hand seat or the right-hand seat. it will not tell you whose hand did it. but you will get such a vast amount of -- just listening to what they're talking about with wreckage, if i looked back at the incidents i have covered, concord, qantas, twa, in all of those incidents huge amounts of information was gleaned by looking at the wreckage and working out what bit failed in what order and to which consequences. >> but have you ever covered a crash in which there was no debris, in which a plane -- in terms of a plane in water, that it entered the water whole? >> you mean sort of like a movie? it goes down intact? >> yeah, or it had a relatively gentle entering into the water. >> well,

it was two years until the robots on the bottom managed to find the fdr and the cvr. >> flight data recordercockpit voice recorder. >> absolutely, yeah. like putting this jigsaw together. there's some really key phases of flight where you can really hone in on what the noises are. for example, reverse thrusters, when you land on the runway, you get the reverse thrusters kick in and they have deceleration or paul and his experts can tune in for that phase of flight. when you get airborne, we lear the undercarriage travel and the wheel travel, you get that specific noise. no one raises eyebrows to that because you hear the noises. there are various phase z of flight that these guys can tune into and put the jigsaw puzzle together. >> just from that sound. >> then anything that sounds a little bit unusual, that's what they'll hone in on. >> mike williamson, i'd like to bring you in in terms of you being an expert. they've refined the search area to ach smaller area several hundred square miles, much smaller than before but still large. it's been eight days now. they haven't heard anything yet.

it is easy to tell on the cvr. another reason to have streaming data from the airplane.lear that could be very clear. this is pretty straightforward. somebody at the airline, people ha work with these two pilots could tell who the voices are. it would be very straightforward. release the radar. there is no reason not to have that and give that to the families. then, we have to get on and talk about what this clue was about some sort of evidence from the airport. what do you mean about that? they told the families they weren't going to get three things, because they were sealed. one was these tapes. one was the radar data and one was some sort of security and surveillance data from the airport. maybe it is the pilots going through security. we have already seen that tape about three weeks ago, which would fall in line with things that are sealed and aren't sealed. that was left unexplained. >> in light of that, tom, is that why these sources are telling us that malaysian investigators think that this was a criminal act. >> i don't think that is why. the video would includ

that is quite different from the cvr cockpit voice recorder. presumptively still at the bottom of the ocean. we have the transcript of the atc, or air traffic control, recording. one would hope that it is accurate and complete, although they are frequently not. i see nothing unusual in that transcript. so at this point all looks normal from that transcript and those air traffic control recordings. the cockpit voice recorder, if it has anything on it, because, remember, records two hours, the aircraft could have flown for over seven, in which case there will be nothing on the cockpit voice order. >> if indeed they were incapacitated for the last two hours. >> right. right. so let me ask you this. because we do -- they have released transcripts. what would you learn from the audio as opposed to learning from the transcripts? >> well, it may well be possible once the proper team of experts is assembled to discern who is speaking at each turn. typically in the u.s. and many other countries the pilot flying the aircraft is not the one talking on the

and that's obviously the cockpit voice recorder, the cvr and the flight data recorder, the fdr.k because this information and the signals are so unique as to what it is we are looking for, underpinned by this very unique analysis from the inmarsat satellites and the intellectual horsepower that has gone into that, i think we're now in a very credible position to really start zoning in on this location and hoping for the best. >> i think you said it best there, saying that they had to first identify the haystack, this expression of finding a needle in a haystack. and they've actually gone around, if this is the wreckage and somehow, some way possibly found it without detecting the wreckage first. we've been listening to michael kay and les abin, aviation analysts joining us both from new york. thank you both. i'm here with rosemary church at cnn center. and we will continue to bring you the latest developments as they relate to the frantic search for mh 370. >> we'll have more news, more cnn newsroom on the other side of this short break. don't go anywhere. [ male announcer ] fir

accidents where the cvr, the flight data recorder and the cockpit voice record er have ben found milesthink in another case they were a mile apart. there's possible there's some distance between them, that they're picking up two different signals. but i think the australians are just reacting to the fact that sort of layer by layer they've been peeling the onion and it's panned out so far. gomez, the yankee player, said it's better to be lucky than good. let's hope for the australians they're both. >> david, is that your feeling, the facts are simply lining up? >> yeah, i think so. i think that's a great deal of it. i go do think there's other information available. from the time it left the harbor it went 15 knots, pretty in much maximum speed, straight to where the pinger was. had hit that two hours of pinging. so they had credible information. it wasn't just the arc that they had. there was other information that said it was probably in that location. the united states is protective about any technology sharing with any other country, even those that are allies. if there was somethi