Finally got to play with your mod, simply...a great mod....it really changes the game and makes it so much more realistic.
I attacked a convoy in Formosa, but took a beating from a TypeAB escort.
I love how you see no damage percentages, but I had 3 compartments showing they were going to flood out and another about 30% flooded. Now I had to guess how deep I could go. As the compartments flooded, my boat took a steep angle, but using my yo yo technique I was able to not head for the bottom. Luckily I escaped the attack..
Before, I would've waited for repairs and probably attacked again, not this time. It was night, but planes showed up. Luckily I made it to shallow water. Much of my boat was wrecked, stern batteries destroyed, lot's of other damage. I lay on the bottom in 200ft of water. I was scared to get in deep water as 3 compartments were destroyed and totally flooded now.
It took a good day to repair repairable damage, cept engines took two days....the flooded compartments stayed destroyed and flooded until I got home.
So, night came, I had to blow tanks to surface, even then my boat rode low in the water, best I could make was 12 kts after repairs.
Before I would've made other attacks, now damage is realistic, you goof, you pay for it and attacking is out of the question, you just want to get home alive.
Coming under attack,

Fighting out of control dive

Sitting on the bottom during the day and blowing tanks to get back up when needed.

Limping home, speeds varied as my engines repaired from 7 to 12 kts, stern riding low in the water

Compartments stayed flooded..Only strange issue was even with BS off, sometime the entire crew would
fall asleep, but if I hit BS again, they wake up, cut it right back off the crew on duty would then stay awake.
Best mod I've DL in a long time.....