they are going to learn something new about the terrain and will make adjustments to the hardware, software, the vehicle and operations plan. it may happen once or twice more. in the air france 447 we had a lot of aborted runs from our robots but you learn. the team is capable so they will learn. >> why not have more than one bluefin. air france had three vehicles. >> i think their approach is different. they are going, captain matthews talked about the tactical approach. they have a solid pinger location and will throw the dart at the bull's eye. our idea was to pick an area that's much larger than the search area and do the entire area, coffer it with multiple vehicles. a different mapping program. >> david, do you think that indicates perhaps they have more information than they are letting on? >> that's the way i'm seeing it. apparently they have a lot of confident dmens where it is or they would have more, like david