I tried the same mission again and perhaps it was a one time thing. IJN escorts now behave properly and do no blow themselves up. I was a bit too cocky and got detected early and pinned down by the escorts.
1. How deep can this thing go (
370 feet and counting, I hope the skipper knows what he is doing):
2. where are those damn
Gaijins?:
keep your U-Boats, I sure love the Pacific...