Scuba Rebreather CCR SIM

 “The ocean does not forgive mistakes”

A browser-based CCR (Closed Circuit Rebreather) dive training simulator.

Practice managing PPO₂ on a Closed Circuit Rebreather with:

• Real-time solenoid auto-firing and manual O₂/DIL MAVs

• 3-cell oxygen sensor voting with suspect cell fault events

• Side-mount bailout gas planning (1 or 2 cylinders, AL40/AL80)

• Decompression stop countdowns (15m and 5m safety stop)

• Distraction tasks simulating real dive cognitive load

• Ascent rate control with TTS (Time To Surface) estimate

• Panic scenario trigger for low-gas near-surface emergencies

Designed for CCR divers wanting to build muscle memory for gas 

management, cell fault recognition, and bailout decision-making 

in a zero-risk environment.

Controls: drag the diver panel to change depth. Hold O₂ MAV, 

DIL MAV or FLUSH buttons to manage loop gas. Press SM BAIL 

to initiate a side-mount bailout ascent.

Best played on desktop or tablet in landscape mode.

G2G Simulations — General Use Disclaimer

Everything published under G2G Simulations is built for education, visualization, and planning reference. None of it is certified software, and none of it replaces professional judgment, licensed engineering, or formal instruction.

Diving tools do not replace certified scuba training, dive planning with a qualified instructor or divemaster, or the judgment calls that come from actual open-water experience. Gas calculations, NDL estimates, ascent profiles, and decompression outputs shown in any simulator are approximations based on standard models. Conditions underwater vary. Tables and algorithms have limits. People die ignoring both. Get certified. Dive with experience. Use these tools to study, not to plan dives you aren’t qualified to make.

Construction and structural tools do not produce engineered drawings. Member lengths, geometry outputs, lumber estimates, and load path visualizations are starting points for conversation with a licensed professional, not substitutes for one. Nothing here is stamped, permitted, or code-compliant by default.

Navigation, weather, and planning tools are reference aids. Verify everything against current official sources before acting on it.

Any simulation, trainer, or calculator on this platform may contain approximations, simplifications, or errors. Real-world outcomes depend on conditions, equipment, training, and variables no browser tool can model completely.

Use these tools to learn, explore, and prepare. Then go get the real training, the real engineering, or the real professional that the situation actually requires.

G2G Simulations makes no warranty of any kind regarding accuracy, completeness, or fitness for any particular purpose. All use is at your own risk.