The World's First Underwater Habitat Just Started Operating — 56 Feet Down, 4 People at a Time

Fri, 10 Jul 2026 00:00:00 +0800

There’s a strange kind of silence 56 feet below the surface of the Florida Keys National Marine Sanctuary. Fish drift past portholes. Sunlight filters through in shifting blue-green shafts. And inside a steel tube bolted to the seafloor, four people are trying to figure out if humans can live underwater — not temporarily, not in a submarine, but as residents.

Vanguard, the world’s first operational underwater living module, just went live at Tennessee Reef. It’s a pilot project built by DEEP, a British company founded in 2021, and it’s designed to test something ambitious: year-round human habitation on the seabed.

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The World's First Underwater Habitat Just Started Operating — 56 Feet Down, 4 People at a Time