If a diver suffers from DCS in a remote location, what is the first priority?

In the scenario of a diver suffering from Decompression Sickness (DCS) in a remote location, the primary concern is the diver's immediate needs and safety. Providing oxygen first aid is crucial, as administering oxygen can significantly help reduce the symptoms and effects of DCS. The increase in partial pressure of oxygen aids in reducing the size of nitrogen bubbles that cause the condition.

Transporting the diver without delay is also a critical priority, as getting the diver to a medical facility that can provide hyperbaric treatment is essential for recovery. Quick transport can mean the difference between mild symptoms and more severe complications.

Ensuring hydration with water is important, though it is not as urgent as providing oxygen and transportation. It supports overall physiological function and can help with recovery, but it is secondary to the immediate medical interventions required.

Considering these factors, the choice encompassing all actions is correctly identified as a comprehensive response to the emergency situation. Each action plays an important role in a coordinated approach to treating DCS, demonstrating that prioritizing these responses together can optimize the diver’s chances of recovery.