What should be done in the event of an unconscious diver underwater?

In the event of an unconscious diver underwater, the appropriate action is to perform a tow to the surface and provide rescue breaths. This response is grounded in the principle of immediate lifesaving measures. An unconscious diver is unable to maintain their airway, and the risk of drowning is significant.

By towing the diver to the surface, you ensure their safety while simultaneously starting emergency procedures to revitalize them. It is crucial to get the diver to safety quickly and perform rescue breaths to restore their breathing. This action reflects a fundamental response in diving emergencies: prioritizing the unconscious diver’s needs and applying basic rescue techniques until further assistance can be sought or the diver can be resuscitated.

Other choices suggest inaction or not assisting the diver, which would increase the risk of drowning or permanent injury. Therefore, the only responsible approach is to assist the unconscious diver immediately.