tactical inspection. now as we move out of that sprint mode, we're going to get more into a marathon pace and things are going to be long, slower, and there may be much different equipment that is brought in. >> what is the maximum depth for bluefin-21? >> it's rated at 4500 meters but today the engineers -- we've gone through and looked at all of the components in bluefin and we're comfortable that we can exceed that 4500 meter limit at this point. >> do we know have deeper this water is? >> the chart told us it was at 4500. it may only be off by 100 meters. we're looking at, can we push it beyond 4500 and potentially as deep as 5,000. there is software and it's been tested now and we believe that with some confidence we could push bluefin to that depth. >> is the bluefin really the right device to be using here, if it goes down here, goes down into the water and it says, oh, this is deeper than i'm