Hover the chart to see values at a given time.
Each index is plotted as a % of a recommended limit.
- CNS% — % of the NOAA 1991 single-dive time limit; recovers with a ~90 min half-time. Hoyt 2025
- OTU (also UPTD) — the classic pulmonary dose; % of 300 OTU/day; no recovery model. REPEX (NOAA)
- ESOT — newer pulmonary dose that includes recovery; % of 450/day, the limit for 7 consecutive diving days. DMAC 35
- ROT — probability of detectable pulmonary toxicity, valid only near 1.3 ATA; not plotted as it has no recommended limit. ROT recovery starts 5 hours after the dive. Shykoff 2015