[SabreHawk]

I can tell ya, the Uboat arm by may of 43' was simply done. After 43' the hunter became the hunted, and Germany's fate was written on the wall.

All the other designs saw little service at all in so few numbers, and made no impact. The Type VII was produced in the highest number(704 in total) and saw far more service than any other. That figure of 704 is of a grand total of 1152 subs built between 1935-1945.(disregaurding the small classes and Walter boats)
Seven futher designs were under consideration, of which only three types were ever built, and in so few numbers they had little effect cause by this time, the tide had turned and so essentially the Uboat's rein was really over in 43'. The Type VII's being the only ones to ever really see success.
The happy times it seems to me is what SH5 is all about, and the rein of the Type VII's in their hay day.

Playing out the rest of the war would be no fun at all, you've no hope to be anything but a hunted and killed animal.