they spend 25 hours searching for a plane and cost half a million to $5 million. >> when you think about it it's not that much money. ship time is tens of thousands of dollars a day to hundreds of thousands of dollars a day depending on the type of ship so auvs make ship time more efficient. so you can recoup ship time by using vehicles. >> when the bluefin is in the water an operate o plans the search path. from there it's on its own. at up to 5,000 impeachmenters it uses sound sonar to record what it senses. when it surface, the operator can download the data and see images like these. how do i know if i'm looking at a rock or back boston red sox. >> you have to be a trained sonar analyst. one of the things that's amazing about this technology is the resolution some the systems has increased. quite a lot of detail so as you can see that's a field of rocks on the left. as the resolution improves and