How do underground bases in the ocean keep water from entering when someone enters or leaves?
In: Engineering
From Wikipedia:
“An airlock may also be used underwater to allow passage between an air environment in a pressure vessel and the water environment outside, in which case the airlock can contain air or water. This is called a floodable airlock or an underwater airlock, and is used to prevent water from entering a submersible vessel or an underwater habitat.”
Source: https://en.m.wikipedia.org/wiki/Airlock
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