CCR Diver Goes Hypoxic on Surface – What Causal Reasoning Taught Me About Learning from Events

An experienced CCR diver faced a dangerous situation when they became light-headed due to low oxygen levels. They realized their rebreather was off and recorded a dangerously low pO2 of 0.09. This incident highlights the importance of focusing on the conditions that led to the hypoxia rather than blaming the diver for not following checks. Key factors included environmental distractions, stress, and a sense of urgency that affected their performance. Understanding the context of these decisions can help improve safety for divers in the future.