What action should be taken when a diver is trapped?

When a diver is trapped, the priority is to ensure their safety and well-being, which includes assessing their air supply. Checking if they have adequate air is crucial because a diver's air supply is their lifeline; without sufficient air, their situation becomes more critical. By confirming that they have enough air, rescuers can determine whether the trapped diver can remain calm and wait for help or if immediate action needs to be taken based on their air situation.

Addressing air supply first provides vital information that informs the subsequent steps in the rescue process. If they are low on air, then time becomes of the essence, and rescuers can act more decisively, whether that means signaling for assistance or planning an extraction method. This approach emphasizes a cautious and structured response to a potentially chaotic and life-threatening situation.