The only thing that perhaps needs to be reconsidered is the crush depth thing. Of course I am glad you made it possible to effectively dive below 210m without the instant death option. But now the boats dive a bit too deep for my taste. For example when I was sunk by an armed merchant once (
LOL), my VIIC reached over 360m before the hull was eventually destroyed.
As far as I can say, the criticial depth in SHIV and SHIII is too small, ca 200m. For VIIC boats, extending it to something like 250m with room towards 280m would be perfect. But I personally believe that almost every regular VIIC (not VIIC/41) would have been definitely crushed at ca 280 - 300m, and some even at 200m.
From
http://forum.axishistory.com/viewtop...f=110&t=191371 :
"In the book "So war der U-Boot-Krieg" by Harald Busch there are reports of U 331 under Freiherr Hans-Diedrich von Tiesenhausen reaching 260 meters (853 feet) in an uncontrolled dive."
"Greatest depth reached by a uboat was around 320 meters (1050 feet) by U-175 (type IXC) on April 17 1943 after a depth charge attack by USCGC Spencer. Survivors of U 175 claim to have reached 320 meters (1050 feet) before correcting, surfacing and being abandoned but I would consider that "not surviving" as such."
With over 1000 specimens, this could be seen as indirect proof that 280-320m was the absolute limit. Some boats will have gone deeper than that, but none could survive it.