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 out there? air france you had three vehicles. >> we had three -- well, i think because their approach is different. they are going, as captain matthews talked about this 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. cover it with multiple vehicles. it was a totally 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 confidence in where it is or they would have more, like david gallo said, more to throw at the target instead of a mass screening of the area. so it does indicate that to me. >> the navy has said they do, david, have another underwater vehicle that can go deeper.