diving-valves

Updated: August 8, 2026

I left the manhole of the turret. The cover was battened down, the engines stopped at the same moment. We felt a slight pressure in our ears for a moment. We were cut off from outside and silence reigned. But this silence was merely an illusion and was due to the change. "Open the diving-valves! Submerge!" The valves were flung open and the compressed air escaped hissing from the tanks.

Willis J. (Willis John) Abbot - Aircraft and Submarines: The Story of the Invention, Development, and Present-Day: Uses of War's Newest Weapons