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CNN CNN Special Report April 15, 2014 02:03:00

Meters down and it triggered a safety mechanism which said i m too deep below my operating maximum. it went back up to the surface after only six hours of going along the bottom and mapping that surface with the side-scan s sonar. they will be analyzing the data and sending it back down soon. it is a very laborious process. but this one is cut short. one interesting observation, the ships searching for debris on the surface, 200 to 300 miles to the west of where the bluefin is operating they turned and headed south in the last 24 hours or so. they are looking for debris on the surface. ....

Safety Mechanism , Operating Maximum , Laborious Process , Bluefin 21 ,

CNN The Situation Room April 15, 2014 21:21:00

An autonomous underwater vehicle capable of going 6,000 meters below the surface. about a mile deeper than the bluefin can go. the u.s. navy has some of those. so why aren t they deployed in this search? the remus vehicles have tasksing. their schedule is pretty tight as to how they operate those vehicles. we asked the navy official for more details and only said that they are used for mapping but could not say where or give any other information. the navy also has a vehicle similar to the bluefin called orion which is towed by a ship. it can go deeper than the bluefin but officials say they have not been asked to send that. options that can be used. brian, thanks very much. let s get some more on this right now. joining us, oceanographer ellen ....

Aren T , Us Navy , Autonomous Underwater Vehicle , Remus Vehicles Have Tasksing , United States , Brian Todd , Oceanographer Ellen Prager ,

CNN The Situation Room April 15, 2014 21:23:00

Do the task at hand. the bluefin, if the depth stays less than 4500 meters, it should be fine. and again, it s just a matter of mapping that sea floor and looking for something that looks manmade. it sounds like this is an operation that could last not just weeks but months, maybe even years until even though it s a relatively small area they are looking for. what s your assessment? i think it easily could be weeks into months. not only do you have the technical difficulty, but as we ve heard, the weather is bad and is expected to get worse and this is always an issue when you re working on the ocean. typically you might schedule a week or two weeks but weather delays and technical problems and just the magnitude of what they are trying to do, yes, it s probably weeks to months. hopefully no longer than that. the fact that they heard four pings, including one that went on for two hours, does that tell ....

Sea Floor , The Ocean , All In One ,

CNN At This Hour With Berman and Michaela April 15, 2014 15:25:00

We will see more mapping of the ocean there are. are these deep towed sonar devices, are they widely available or is that a massive investment? it depends on the depth rating. you know, for this kind of depth, down to perhaps 6,000 meters or 20,000 feet, there are around eight of these vehicles in the world. they are in industrial use most days. and they are capable of swath widths of, you know, two or even three miles. so, very, very powerful machines, but of course, they are only of use to people who have the specific need in mind to go and find a single target on the sea floor or to map undersea infrastructure, like oil and gas installations. or, say, perhaps a missing jetliner in day 39. rob mccallum, you think that we will see this kind of device being used there in the near ....

The Ocean , Depth Rating , Swath Widths , Rob Mccallum , Sea Floor , Under Sea ,

CNN At This Hour With Berman and Michaela April 15, 2014 15:16:00

Down here and in complete blackness. one advantage, quite calm at this level, very few currents or anything to affect anything down here, but controlling something down here from way up here, getting it back and forth, this is more experimental than the way we have been talking about we talk about like it s a simple thing to do. it s not simple at all. even though they have done it before, hasn t been done so many times this this is routine, michaela. i imagine though, like anything, when you go in to learn one thing, end up learning all sorts of other things, that this is unchartered area we have been talking about before. they probably are getting some data and research that they can use for other things. yeah, once they finish this mapping of the ocean floor out there, by the time they have been able to go with ships like the hms echo and side-scan sonar and pictures of the ocean floor here, yes, we will have a body of knowledge that we absolutely do not have right now about t ....

Michaela Pereira , Hasn T , Broad Scale Search Area , Ocean Floor , Side Scan Sonar , Hms Echo ,