that's the best that we can do. >> would you use those sort of headphones, little in-ear headphones? >> no, no, no. of course not. >> you heard them earlier saying they're looking at signals rather than hearing them. they're looking at waves. >> they may be able to convert a received signal to an audible signal. so what they're listening to is derived from a signal. but under any circumstances, you would want something with quality. and that would mask the ambient sounds of a moving ship. >> just to make the point though, to bill, what i'm not saying is that the chinese don't have extremely sophisticated technology. they do. >> we just don't know. >> i have no doubt they've got it up the wazoo. we just don't know what it is. >> they're not showing it. >> those are the pictures that we're seeing. but is that what they're using to pick up the pings?