Somebody Built an Underwater Base in the Florida Keys (It Wasn't My Villain)

Every mystery writer keeps a mental list of perfect places for a crime. A lighthouse in a storm. A boat with only one way off. And right near the top of my list, there's a sealed room at the bottom of the sea.

So you can imagine how I felt when I read that a real one is now sitting on the seafloor in the Florida Keys. Did they steal my idea?

Nope. I'll probably steal theirs.

Meet Vanguard

A company called DEEP has installed an undersea habitat called Vanguard on Tennessee Reef, inside the Florida Keys National Marine Sanctuary. It's about 17 meters down. That's roughly 56 feet. Well within recreational diving depth, but deep enough that popping up for a snack isn't really an option.

Vanguard is built for crews of up to four on multi-day missions. Instead of diving down and coming back up, they'll live on the reef for days at a time.

Triton Submarines helped build it. (Personal sub fans will know the name. Fin Fleming certainly does, since they built hers.) Their engineers spent nine months working with DEEP's team on assembly, the electrical work, and pressure-testing the viewports. I'm very glad somebody tested those viewports. They're the only thing between you and the Atlantic.

The habitat is in place now. Next comes commissioning and testing, and then the first crews move in.

Why Did My Brain Go Straight to Trouble?

Let me be clear. This is serious science, and I hope it's a huge success. I'm cheering for every crew that goes down there.

But I write mysteries, and my brain doesn't take days off. About thirty seconds after reading the news, I had a list.

• The power goes out. Four people, one habitat, and a swim to the surface in the dark. Somehow, even all the flashlight batteries are dead. Oh, and the shark. Or a tentacled creature. Or something... shudder... unknown.
• A storm rolls in up top. The support boat has to leave. Nobody's coming for a while. Systems start to fail. People start to bicker. Tensions rise. Everybody's ready to snap. Somebody does snap.
• Someone knocks on the viewport. From the outside. Gulp.
• Four go down. Three come up. You know where I'm going with that one.

Fin would have opinions. Mostly about the lighting for her photos, right before things go very wrong. And also, the adequacy of the supply of chocolate chip cookies.

Fact Is Catching Up With Fiction

When I started writing about the underwater world, personal subs and undersea habitats felt like something out of a Bond movie. They're still not cheap. But they're real now. Companies like Triton build subs for private owners and scientists, and now there's a place to live on a Keys reef.

For a writer, that's a gift. The line between plausible and far-fetched keeps moving, and stories get to stay just one step ahead of the news. Keeps me on my toes, that's for sure.

Your Turn

Would you spend a week living on the bottom of the ocean? Or are you firmly in the "I'll read about it, thanks" camp? Tell me in the comments. I'm curious which way you lean.

If undersea trouble sounds like your kind of reading, Fin's adventures start with In Deep.

Source: Superyacht Guide, Oct. 12, 2026