What is the appropriate response if a diver is unconscious underwater?

When a diver is found unconscious underwater, the most critical action is to safely bring them to the surface as quickly as possible. Lifting the diver to the surface is essential because they cannot breathe or respond effectively while submerged. Once on the surface, providing rescue breaths is necessary to ensure oxygen is delivered to their lungs, which can help revive them.

This response prioritizes the immediate physical safety of the unconscious diver, addressing the urgent need for oxygen and preparing for potential further resuscitative measures. Additionally, rescuing the diver rather than leaving them or attempting revival at depth is essential because any delay in getting them to the surface increases the risk of hypoxia or drowning. Alerting nearby divers without intervening does not address the immediate need for rescue and can lead to further complications. Similarly, attempting to revive an unconscious diver at depth can be extremely dangerous for both the diver and the rescuer due to the additional risks associated with breathing compressed gas, possible rapid ascents, and the inability to provide effective rescue breaths in an underwater environment.