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AeroPlus Deco

A technical dive decompression planner for open-circuit and closed-circuit rebreather diving, built on the Bühlmann ZHL-16C algorithm with gradient factors. Runs in any modern browser, installs as a home-screen app, works offline.

Open the app Quick start

What's in here

  • Getting started

    Open the app, build your first plan, and read the output. Takes about five minutes.

  • Concepts

    Gradient factors, tissue saturation, deco stops, gas density, CNS — what the numbers mean and how to use them.

  • Planning a dive

    Cylinders, profile, contingencies, and reading the runtime schedule. Step-by-step.

  • CCR diving

    Setpoints, diluent, and bailout planning — what changes when you switch to rebreather mode.

  • Calculators

    Best mix, MOD/END, gas blending — the standalone planning tools.

  • FAQ

    Common questions and quick fixes.

About the app

AeroPlus Deco is developed by Magnolia Blossom BV (Doesburg, The Netherlands) for technical divers who want a clear, fast planner that runs anywhere without installation. The app calculates open-circuit and CCR profiles, tracks oxygen toxicity, supports gradient factor tuning (including the Andy Davis method for OC), and produces shareable plans you can send to a buddy via a single link.

The codebase is a single HTML file — no servers, no analytics, no telemetry. Your plans never leave your device unless you share them.

Planning calculator only

AeroPlus Deco is a planning calculator. It is not a dive computer and cannot be used during the dive itself — always use a certified dive computer in the water. Verify calculations against a second planning source before relying on them. See the full disclaimer.

Latest changes

For release notes and upcoming work, see the GitHub issues page.

For bug reports or feature requests, use the Help & feedback menu in the app, or email support@aeroplus-deco.com.