Tore-
THAT is exactly the kind of thing I was looking for! And I think your description about what could happen if something got loose in the area between the working deck casing and the pressure hull would be absolutely correct.
I have heard of cases where a tool like a hammer or spanner got loose between the casing during a crash dive. That would be disastrous!
That picture of the torp loading hatch for U-604 has a limbered bulkhead similar to the one for the cook's loading hatch - and could very well be what I need to put around the torp loading hatch on my boat.
I am surprised that there would not be a way for a crewman to get down inside that section of the boat while at sea. There are so many air lines that run over the outer surface of the pressure hull, I would think access to them would be important, but a thin sheet metal bulkhead that would limit "spillage" would make sense.
Thanks for continuing to think about my quandary.
I worked on a few more frames in the forward section, put in my deck stowage box and got my ancher chain and hawser tube in, and am finally laying in the lube lines for the torp gear inside the tauchzelle 5. I will post pics this afternoon.
Thanks again!
Christopher