When using enriched air, what is a major consideration for divers regarding atmospheric conditions?

The major consideration regarding atmospheric conditions when using enriched air is the high oxygen content. Enriched air typically contains a higher percentage of oxygen than normal air, which is composed of about 21% oxygen. In enriched air diving, oxygen concentrations may range from 32% to 40% or more, depending on the specific mixes used.

The increased oxygen levels in enriched air have implications for both safety and dive planning. Higher oxygen content can lead to oxygen toxicity, particularly at greater depths. This is a serious concern, as oxygen toxicity can affect the central nervous system and pose substantial risks to divers. Therefore, divers must be vigilant about their depth limits based on the specific blend of enriched air they are using.

Divers need to monitor their exposure to oxygen and consider choosing dive depths that minimize the risk of toxicity, which is directly linked to the partial pressure of oxygen experienced at depth. Understanding and applying this knowledge helps ensure a safe diving experience with enriched air.