A look at the complex valve system inside the German submarine UB-110 from 1918.
This photo from the Tyne & Wear Archives & Museums shows the insane valve system inside the control room of the German submarine UB-110. The photo was taken in November of 1918, during the salvaging process after the sub sunk.
From the photo description:
This image shows manhole to periscope wall, valve wheels for flooding and blowing. Hanwheels for periscope gear, air pressure gauges. The UB-110 sunk after attacking a merchant shipping convoy near Hartlepool in July 1918. It was then salvaged and transferred to Swan Hunter Wigham Richardson Ltd. Dry Docks (Wallsend), with an order to restore her to fighting state. The order cancelled following Armistice and she was scrapped thereafter.
More photos and the story of the UB-110 sinking right here.