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Potential risk in this case is constantly circling its wagons to avoid liability and there by trying to pocket millions, ma e maybe, billions of dallass, british airlines and boeing are in business to make money. >> gentlemen, few very much. when we come back, the blue fin 21 is the only auv currently searching the indian ocean. this is actually what found the air france wreckage. if you have moderate to severe rheumatoid arthritis, like me,

Retreat. but, you know, that is just one piece here, brooke. and at depth it will take you a long time to start clearing a lot of debris. so moving just one piece is only just one small event. we're talking about hours you could be down here doing this. long term you could be 15 hours or more. >> we were talking about the auv. what are the advantages and disadvantages of using an auc, rov versus controlled by man? >> that's a very good question. the differences between an auv,

Literally found debris within 6 1/2 nautical miles of the last known position. sometimes it does take time to search these areas. the period of time where they actually found the debris, it was actually the 18th mission of the auv that found it. we are in the fourth and fifth mission. we are early in the search process. >> richard quest, i asked him and i said, what could a new search, a new mission look like. maybe it should be what should this one look like because you have been looking at what the malaysians should be and are doing. are they doing everything correctly? >> they're doing ever...

Widespread in their abilities. >> you are an expert in so many days bringing up precisely that. the towed -- tell me what it is again? >> sonar -- side scan sonar is deployed one of two ways. you can put the unit on to an auv. or you can toe it on an underwater sled behind the ship. because you're running power down the cable you have a lot more strength in your signal. so blue fin is covering 15 square miles a day. we could find a deep towed unit that would do ten times that amount a day. when you bring up plans a, b, and s. my ears perked when you said plan s. what does plan c look like?

Are tethered to the ship up above? there is a different auv that is tethered to the ship that would send the data back in real-time? >> those are called rovs, remotely operated vehicles. but those move very slowly and cover ground very slowly. the sown arrest in don't operate as well from those. the autonomous vehicles can cover more ground quickly than those rovs. >> how long are they going to go on this, richard? the prime minister, tony abbott of australia told "the wall street journal," quote, we believe the search will be complete within a week or so. if we don't find wreckage, we stop. w...