Decompression Dive Planner

Dive Planner — Key Features

• Bühlmann ZH-L16C decompression algorithm with 16 tissue compartments
• Open Circuit and CCR (Closed Circuit Rebreather) dive planning
• Multi-gas planning with automatic deco gas switching
• CCR setpoint management, diluent configuration, and equivalent gas modeling
• Bailout planning with stress factor and OC emergency gas analysis
• Configurable gradient factors (GF Low / GF High) with 6 presets and custom values
• Detailed ascent profile with runtime, gas consumption, and safety metrics
• CNS/OTU oxygen toxicity tracking and gas density warnings

Dive Planner — How It Works

Set your maximum depth, bottom time, and gas mix. Choose between Open Circuit or CCR mode — for CCR, configure your setpoints, diluent gas, and O₂/diluent tanks. The planner calculates your complete decompression schedule using the Bühlmann ZH-L16C algorithm with equivalent gas modeling for CCR. Add deco gases, enable bailout planning to verify emergency gas reserves, and adjust gradient factors to match your conservatism level. View detailed phase breakdowns, gas consumption analysis, and safety metrics — all updating in real time.

Why Use Our Dive Planner?

• Based on the Bühlmann ZH-L16C algorithm — the gold standard in decompression planning
• Full CCR rebreather support with setpoints, equivalent gas modeling, and bailout planning
• Supports air, nitrox, trimix, and heliox gas mixes
• Save and share dive plans with your buddy or instructor
• Works on any device — desktop, tablet, or mobile

Dive Planner — Frequently Asked Questions

What algorithm does the dive planner use?

The dive planner uses the Bühlmann ZH-L16C decompression algorithm, developed at the University of Zurich. It models 16 tissue compartments to calculate safe ascent profiles for any gas mix.

Can I plan multi-gas dives?

Yes. You can add multiple bottom gases and deco gases. The planner supports automatic gas switching based on MOD or at the first deco stop, and calculates gas consumption for each tank.

What are gradient factors?

Gradient factors (GF Low and GF High) let you adjust the conservatism of your decompression plan. Lower values are more conservative. Common settings range from 30/70 (very conservative) to 50/85 (less conservative).

How deep can I plan dives?

The dive planner supports depths up to 200 meters (656 feet). It handles recreational, technical, and extreme exposure profiles with full decompression calculations for any depth within this range.

Can I export or share my dive plan?

Yes. You can export your dive plan as a PDF document with a detailed profile chart, decompression schedule, and gas consumption summary. You can also generate a shareable link to send your plan to a dive buddy.

What safety stops does the planner include?

The planner automatically includes a 3-minute safety stop at 5 meters (16 feet) for recreational dives. For decompression dives, it calculates mandatory deco stops at each ceiling depth based on your gradient factor settings.

Does the dive planner support CCR (rebreather) diving?

Yes! The dive planner supports both Open Circuit and Closed Circuit (CCR) diving. Switch to the Closed Circuit tab to configure your setpoints, diluent gas, and O₂/diluent tanks. The CCR planner includes full decompression calculations with equivalent gas modeling, plus bailout planning to verify your OC bailout gas is sufficient in case of loop failure.