Oxygen exposure
Make oxygen-exposure assumptions visible across simple dives
Estimate cumulative CNS exposure using NOAA-style limits and a 90-minute half-time reduction during surface intervals.
Planning aid
Multi-dive oxygen exposure estimate
Add up to three dives. Surface interval reduction uses a 90-minute half-time model.
Estimated cumulative CNS
10%
Highest ppO2
1.09 ATA
Status
Educational estimate only.
Planning boundary: This high-risk topic is educational only. It is not a dive computer, decompression planner, medical clearance, emergency instruction, or technical-diving training.
Formula and source notes
For oxygen and table context, review DAN oxygen toxicity guidance and NOAA Diving Program resources.