>> well, it would probably be cable. the best way to do this would be with man submersibles, but the depth is prohibitive for most submersibles. when you're working that deep with an rov, seeing what you want to see is kind of tricky. it's like looking through the roll of a toilet paper tube, but you can do it, but it's better if you have people down there, the human eyeball, man submersible, but they probably won't have that capability at these depths. >> so, mary, if it's founded at those depths, what's the best way of pulling it up? cables, robotics, submersibles? what? >> it depends on what they're going after. what they will do if it's really down at that level is they will use a submersible to get the key parts they're going to need.