/sci/ - Science & Math

>>3473311

>>How effective is this? Like, how much air can they hold? Are they safe?

They're safe, concrete submarines have been around for years (pic related). They're ugly but they do the job. This is just building a structure from a kind of concrete that is comprise of free floating oceanic mineral particles.

It would hold air just fine and be plenty strong, even as a 1atm structure down to at least 500-600 feet. My concern would be anchoring it securely to the ocean floor.