Use this thread for any further communication and feedback regarding this mod;
http://subsim.com/radioroom/showthread.php?t=239358
Proof of concept mod.
This is only the VIIB as it's the only Sub I've fully tested so far.
All weights and displacement changed from Long Tons to US tons assuming that's what the game uses since it also seem to be using US miles for range.
I'll explain in further details exactly what the final tweaks are and I'd appreciate feedback on this one. During testing the boat never went below 6 meters in bad weather. It cuts through some waves while riding others, depending on whether she's rising or falling when she hits the wave. I managed to keep the stern lower than default and make the bow rise to keep the boat afloat rather than going for those infamous 10m dives with crew on deck. You'll rarely see the propellers out of the water.
It's worth noting that I've only tested the mod with MEPv6 installed, which I believe affects waves somewhat.
Warning: The mod only affects a tiny .sim file in the VIIB Submarine directory
DOWNLOAD v0.1