In the event of a non-breathing diver, what is the primary goal of rescue breathing?

The primary goal of rescue breathing in the event of a non-breathing diver is to maintain oxygen flow until professional medical help arrives. When a diver is unconscious and not breathing, immediate respiratory support is crucial to prevent brain damage and maintain vital organ function. Administering rescue breaths provides essential oxygen to the lungs, thereby facilitating oxygenation of the blood, which is vital for the survival of the diver.

While other options may touch upon important aspects of dive safety, the urgency in a non-breathing scenario is to sustain life through effective oxygen delivery. Bringing a diver back to the surface and preparing them for immediate ascent may be necessary steps, but they do not address the immediate need for oxygenation. Using the diver’s own equipment can be helpful but is secondary to the primary goal of ensuring that adequate oxygen supply is being delivered to the diver's system. By focusing on maintaining oxygen flow, rescuers can significantly increase the chances of recovery and survival until further medical assistance can be provided.