How do underground bases in the ocean keep water from entering when someone enters or leaves?
In: Engineering
If you put the “door” in the floor, it would be possible to keep the water out with just air pressure. That way you could leave the door open all the time and enter or leave as you wish. Water will only enter such a base because of gravity or a higher pressure in the water vs the base. Having the door at the bottom fixes the gravity issue as things rarely fall up. If you keep the air pressure inside the station very high then that can stop the other reason water would find its way in.
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