What initial action should be taken when assisting an unconscious diver?

When assisting an unconscious diver, the immediate priority is to ensure the safety and well-being of both the unconscious diver and any other divers involved in the situation. Performing a risk assessment is crucial in this context, as it helps identify potential hazards in the environment that could put rescuers or the unconscious diver in danger. This step ensures that the rescuer can act without causing further harm, taking into account factors like depth, visibility, current conditions, and the presence of other divers.

Once a thorough risk assessment is completed, the rescuer can proceed with appropriate actions based on the findings. This may involve calling for help, retrieving the unconscious diver while ensuring safety, and administering any necessary first aid once the area is secure. The assessment phase is vital before engaging in direct rescue efforts, as diving scenarios can change rapidly, particularly in cavern or overhead environments.