I didn't even know that submarines no longer use classical propellers. I was surprised when I read it on Wikipedia and then again when I noticed that this is no

I didn't even know that submarines no longer use classical propellers. I was surprised when I read it on Wikipedia and then again when I noticed that this is not unique to the Astate-class while trying to find images of hydrojet submarines. You can see this in the way I worded my comment, I guess it was pretty obvious to you.