[Defiance]

Thing is guys, The British had bust the german coding, even when another wheel was added to the machine

Generally whitehall knew orders etc before the u-boat captains

This was kept from the americans for sometime for one reason or another, several convoys were sacrificed to keep the secret safe (sad but in general you can see the point)

So i'd guess the new sub/s would of been hunted down just like the older boats

Thus maybe not having a massive impact as maybe thought

My 2c worth