Who had the best submarines in wwII?

[Gargamel]

Originally Posted by VONHARRIS

IMO the XXI and her little sister XXIII were the best subs of WWII.

While the XXI did see a little service in the war, you really can't count it as a boat from the war. It was the next generation of sub design, and it (and it's progeny) redefined what submarine warfare is.

Just like the Me 242, it's biggest impact was on the future, not the present.

Had the XXI come out earlier, or the war lasted longer, I think it would have been, hands down, the best sub in the war, but it didn't see enough service to be really considered part of the war.