No the USN does not have the acoustic signature for the Song class. But trust me the USN is working on that. Yuan I'm not sure of.they probably have a kilo's sig, but not a yuans or songs.
MIGleader I'm sure it could be done but are you aware that there many obstcales underwater that need to be navigated? I'm sure the technology exist to remote control a sub. But it won't be as easy as some may think.a remote control ming is not impossible, all you need to do is steer it, not fore it or submerge it or anything complicated.