[Sailor Steve]

Realistically, in a crash dive the sub takes on a steep angle. Crew members would be hanging on to whatever structure was handy rather than working.

Likewise I keep the Automatic Reload for the torpedoes turned off. After firing the sub would necessarily be using steep diving angles to avoid depth charges, and it is impossible to reload torpedoes under those conditions. They would fire them all, go deep and make sure they were not being chased before they even considered starting to reload.

Also the same calm conditions required for bringing in external torps would keep them from reloading internals while surfaced if the sea was rough at all. The game lets us get away with a lot of things that were impossible (or at least impractical) in real life.