and analyze and cover every lead, as you said. >> i know when we're covering oil spills, usually, unless it's a huge pouring of the liquid, it goes down pretty fast. but i guess they have to test it, right? >> they do have to test it. remember, this is a synthetic oil. it's not something you find in a diesel engine so they'll know right away. >> is the synthetic a different buoyancy? >> it's much lighter than the seawater. >> but it doesn't float longer than ordinary crude oil? >> not necessarily. it may be less sat rateable. >> the new term, the bluefin 21, i've heard. the alvin, the remora, what are these, mary? >> well, they're more advanced vehicles. and the alvin has the ability to go down to greater depths. you know, with each passing day with the bluefin if they don't find anything, or if they find something that's at a greater