I hope we had one of our subs shadowing it and getting it's signature, etc.
You never know what the future will bring.
Is it possible to install nukes into a sub that wasn't designed to carry them? And if it is,how difficult is it?
The USN probably did that & besides the ROK is a frontline pal & they wouldn't probably mind US subs getting too close.But these boats are extremely difficult to detect once submerged & running on their batteries or AIP.....