[BennyB]

Either way you should start rescusitation immediately.

I was reading in an Australian newspaper that they are implementing a new rescue standard - instead of arriving at the scene, checking vital signs (pulse etc,) then administering 5 quick breaths, then starting CPR, they are arriving at the scene and immediately starting CPR but at a quicker speed (can't recall the exact ratio). The idea is to start to pump the blood around the body as this may be more important than the first few breaths.

I don't think this would work with freediving. Even many lifeguards have said it's dangerous and they would not be doing it. Imagine if someone was just unconscious and you ran up and started chest compressions on them...