Very good, Gene.
You've learned how to upgrade your PCs, now only STOP using that antiquated underwater equipment and you'll be in even better shape
. Your man, submerged 40 or so feet is a dead duck.
Submarines no longer have bow and stern tubes. They also no longer have foward and aft torpedo rooms only one which is located amidships right over the "pop-fizz-pop-crackle" batteries, and below and aft of the sail.