[CB..]

even in the stock campaign it is pretty murderous once you get into 1943--
re charging your batterys without a snorkel sooner or later involves you fighting it out on the surface -if your any where near the coast any way---

i just lost half a crew because i had no batterys left and had to surface--did manage to recharge the batterys tho--17 dead as a result ouch--

not enough crew in the barrcks at port to replace them all so nect patrol is with less than a full stack--and this time i'm going the long way round to the patrol zone--oh yes sirree--

i've allso knocked the settings down a little in airstrike.cfg to strike a gameplay balance --
so it's pretty bad as stock in some areas--