Read "Submarine!" by Ed. Beech and then read "Iron Coffins" for a comparison. Both started about the same time and had very similar experiences. A great comparison. Will also help with your tatics.
I also read a story about the American submariner who after WWII took command of the I400 for testing and sailed it to Hawaii. The american crews had to work next to the Japanese sailors to learn how operate the boat. How scarry would that be.
"You pull lever GI and boat dive, sure, you go ahead and try, Japanese boat dive fast, you see"
It was also very interesting when he was talking with the Japanese Sub commanders and they were swaping war stories. It was always in terms of "us" and "them". "Us" meant submarines and "Them" meant surface vessles regardless of nationality.
