But, are our surveillance services continuously monitoring every cubic inch of our territorial waters? Dunno.
Do our foreign adversaries have stealth capabilities sufficient enough to creep that close to our shores unnoticed and undetected? Dunno.
Could our surveillance services have been fully apprised and aware of this sub, and not set off the alarm bells while they watched it, for strategic reasons? Dunno.
Could our military services be so degraded that this incursion into our territorial waters happened without us even knowing about it, until the big "Uh-Oh"? Dunno.
I really want to believe that there's nothing to this story, but there are just too many things about it that add up, and too many that don't. As I said before - Dunno.
They were in 1970 with pocket calculator technology.