What is a “dead air space” in wreck diving?

In the context of wreck diving, “dead air space” refers to areas within a wreck where air becomes stagnant, not circulating adequately. These spaces can form in confined sections, such as inside a sunken vessel or amidst debris, where air pockets exist but do not mix with fresher, moving air. This stagnant air can pose risks to divers, including the potential for lower oxygen levels and an increased concentration of carbon dioxide, which may lead to disorientation or other hazards.

Understanding the presence and implications of dead air spaces is critical for divers. It helps inform planning for dives, ensuring that divers are aware of the potential hazards and are equipped to address them. This awareness contributes to safer diving practices by encouraging divers to avoid prolonged exposure to such areas and to monitor their time spent in confined spaces.