What should be done if a diver experiences loss of consciousness due to hypoxia?

Administering basic first aid and 100% oxygen is essential in the event of a diver losing consciousness due to hypoxia. Hypoxia occurs when the body or brain is deprived of adequate oxygen supply. In such a critical situation, immediate action is required to revive the diver and prevent further complications.

Providing 100% oxygen can help restore adequate oxygen levels in the body more quickly than regular atmospheric air, as it displaces nitrogen and allows for quicker recovery from hypoxic conditions. Additionally, basic first aid measures, including ensuring the diver's airway is clear and monitoring vital signs, are necessary to stabilize the individual and provide optimal support until advanced medical help can be obtained.

Other options are less appropriate or potentially dangerous. Continuing the dive is not viable since the diver is unconscious and could sustain further harm. Waiting for recovery lacks active intervention that could save the diver's life, and simply calling for a medic without providing immediate assistance may lead to preventable adverse outcomes. Therefore, taking immediate, proactive measures like administering oxygen and performing first aid is crucial in this scenario.