If a passenger is unconscious but breathing, what should be administered?

When a passenger is unconscious but breathing, the administration of oxygen with a Portable Oxygen Bottle (POB) is the most appropriate action. This choice is correct because the primary concern in this scenario is to ensure that the passenger receives adequate oxygen to support their breathing, especially since they are unconscious and unable to maintain their own airway effectively.

Providing oxygen helps to increase the levels of oxygen in their bloodstream, which is critical for their vital functions. Additionally, monitoring their condition while oxygen is being administered can help stabilize them until further medical assistance can be obtained.

While CPR is essential in cases where there is no breathing or heartbeat, it is not necessary for someone who is breathing, even if they are unconscious. Water is not an appropriate or safe option in this situation, as it could risk choking or aspiration. Similarly, while medical assistance from nearby passengers might be helpful, the immediate priority is to ensure the passenger is receiving oxygen to support their breathing. Hence, administering oxygen with a Portable Oxygen Bottle is the correct response.