When should first aid for an unconscious diver be initiated?

First aid for an unconscious diver should be initiated immediately upon recognition of unconsciousness. This is essential because the condition of an unconscious diver can rapidly deteriorate, leading to more severe complications, including the risk of drowning or further injury. Administering first aid promptly increases the chances of a positive outcome and ensures that any potential airway obstructions are addressed quickly.

In the context of diving, unconsciousness can stem from various causes, including but not limited to a lack of oxygen, decompression sickness, or even trauma. Recognizing this critical state immediately allows for necessary interventions, such as placing the diver in a recovery position, administering rescue breaths if required, and alerting emergency medical services without delay.

Waiting for symptoms to present or performing first aid at a later time, such as after ascending or before entering the water, could jeopardize the diver's safety and the effectiveness of the first aid response. It's critical to act swiftly to provide the best chance of recovery and to mitigate any further harm to the unconscious diver.