Russians have done it, Japanese have done it.
The Monterey Bay has canyons so deep a sub could hide there for a year and go undetected. Julie Packard founder of the Monterey Bay Fish Prison and the underwriter of the Monterey Bay Sanctuary for Julie and off limits for everyone else, wouldn’t let any Navy vessels in capable of looking for submarines.
Nor is it ok to fly military planes over the stolen waters called ‘sanctuary’.
So you have no idea, because the government supports people like Julie Packard who don’t respect our national sovereignty.
I consider some older sub technology as a hobby, I have only vague conceptions of what is POSSIBLE but there is subs that go far beyond diesel electric, even the Germans had a primitive fuel cell sub at the end of WW2.And subs don’t have to have humans on board, they could be placed years ahead of time.
And the Japanese also had literally a submarine that launched aircraft with a watertight hanger, two of them as a matter of fact.
Now if a person was to really take off on a conspiracy theory what if this is a Captain Nemo situation? A rogue sub, possibly funded by Islam, built in North Korea, hidden under or inside a Chinese tanker and then “deployed” inside SOSUS waters?
Its been done by everyone, what better way for a sub to be inserted near a coastline than for it to be dropped from an underwater cradle?
I would love to write a book about this, maybe Patrick Robinson or Tom Clancy will.
If this was a rocket launch it was ours, why won’t the Pentagon say why? It could be better strategically to not say anything, let our enemies think we are weak, confused and disoriented from the highest level of the chain of command, which of course we are.
We are sending the best propaganda right now to the world by NOT saying what it was.