[Chad]

We all know the scene in Das Boot when the Captain, the Chief, and the guest arrive in the U-boat pen and all of the crew is on deck waiting patiently, but I am curious, on the day of a U-boat setting sail what actually goes on prior to leaving for their mission?

I am sure it takes more than a morning to make sure the U-boat is sea-worthy, including loading the weapon stores, cramming as much food and water wherever there is space available. But what specifically (even if it is a check list) does the crew do the day of departure?