Origin Story: A Logbook for What You See

Watching life underwater is the most exhilarating thing nature has offered me. You meet critters that make sci-fi monsters look like déjà-vu. And you rethink your anthropocentrism the moment you enter the food chain — not at the top, where we usually picture ourselves, but somewhere in the middle of it.

That feeling is why I dive. It is not what dive logbooks are about.

The life-support problem

Let’s be honest about scuba: down there, you are on life support. Forget the gear and you die. So the gear gets respect — training, checks, redundancy — and the logbook inherited that mindset. Depth, minutes, bar in, bar out, weights, mix. Every page of a classic logbook is a record of what kept you alive.

Fair enough. But read an old page back and try to remember the dive. Forty-two minutes, eighteen meters, sixty bar left — and not one word about the eagle ray that flew over the reef like it had somewhere better to be.

The gear is how I dive. It was never why.

A logbook about encounters

So I built Tortuba, in 2012, as the logbook I wanted: one about what you see, not what keeps you alive. The parameters are all there when you want them — duration, depth, air, site, buddies, conditions — but the heart of the app is the other question: who did you meet down there?

You identify the species you encountered among 10,000, offline, because dive boats don’t have signal. You give nicknames to the fish you keep meeting. A toothy William Shakespeare coaches you through telling the story, because writer’s block is real even at sea level. Your buddies and instructors sign the pages. It’s a logbook you actually want to fill — and one that survives boat bags better than paper ever did.

Why it matters

The joy I get from knowing that this life exists — and that you get a chance to meet it — is immense. That joy is the most honest argument the ocean has. Someone who remembers the fish they met cares about the water those fish live in.

So don’t just keep your dive count growing. Keep the number of people you inspired growing too.

Tortuba is free on the App Store — and a major refresh is on its way.