This is an excellent mod. I got all the way to capetown and got my bow blown off by a catalina, even though I just dived and thought I was safe. Attacking convoys is a near death sentence.
If I might have one request, it would be that you do a 'lite' version, that retains the upgrades, to go with the pure historical version. Ive put the upgrades back in, just so ive a chance of surviving more than 10 minutes.
Anyway, first rate work. Ill let you know what I think of the indian ocean if I live long enough to get there.