What is the role of oxygen make-up in diving?

The role of oxygen make-up in diving is crucial because it directly affects the gas mix that divers breathe, which in turn influences both narcosis and toxicity. High concentrations of oxygen can lead to increased risks of oxygen toxicity, especially when diving at greater depths. As the depth increases, the partial pressure of oxygen also increases, heightening the risk of adverse effects, such as convulsions or other serious health issues.

Additionally, oxygen levels play a significant role in narcosis, which is a condition that can impair judgment and cognitive function under pressure. Different gas mixtures, including varying levels of oxygen, need to be carefully managed to ensure the safety and efficiency of dives.

Therefore, understanding how the makeup of oxygen in a gas mix affects these factors is essential for divers to minimize risks and enhance their overall diving experience. This aspect is critical in dive planning and is a significant focus for dive supervisors and those involved in managing dive operations.