I think we can downsize them somewhat,... to me Navy isn't pursuing drone strike quickly enough. Very disappointed they turned good prototype into just a tanker. Could save some money by buying some D/E subs too instead of all nuke.
Ever ridden a D/E boat on the surface while recharging batteries?
Of course you haven't!
I have. Noisy as hell. But turn off those diesels and submerge and you are the quietest boat in the water.
You have? When and where? I am throwing the bullshit flag on that comment!
You can submerge and crawl along at speeds that most surface ships will easily outrun you, and then you will eventually have to recharge again, making you vulnerable near the surface. You know that aircraft can easily see you even when snorkeling, right?
In 1980 as part of ASW training missions before the USS Blueback was sent across the Pacific. My boat was in Newport News shipyards for refit and they were desperate for an SK (shortage of them in submarines in the early 1980s). The temporary duty gave me a leg up on my quals. And yes, they have to surface and turn on the diesels to recharge the batteries. But they can run 24 to 30 hours submerged (might be longer, its been a long time since I had to know that)
As for speed, the best way to hide is not going fast. In fact, higher speeds increase the chance of cavitation. My boat, the USS James Madison, was virtually undetectable when cruising low & slow. In fact, when we came out of the shipyards and went to sea trials, we were included in ASW training with the a surface fleet group. Ever participated in that? The sub has 3 colors of flares. Red for a hit on us. Green for a hit on the skimmers. And yellow when our position was requested. The training was cut short when we ran out of yellow flares. If you can find out who was the CO of the USS America in the mid 1980s, ask him about a polaroid pic he received in the mail. It was taken through the USS James Madison's periscope. We came to periscope depth directly behind the America and the Old Man took the pic, wrote "Gotcha" on it and mailed it to the CO of the America.