[Hey, most of the stuff Nira's giving away is random harmless food and clothing. She's definitely keeping her own weapons in her room!]

It seems designed to accommodate people to live in here rather long-term, at least. But I don't know why it'd be needed for random civilians, instead of something like a group of people who're actually interested in living under the ocean. Not to mention apparently we get fed better food than the people working in the same building as the Professor.