What is the correct method to assess a diver's responsiveness in an emergency?

The correct method to assess a diver's responsiveness involves gently shaking their shoulder and asking if they can hear you. This approach is effective because it combines physical stimulation with verbal communication, which helps determine both the level of consciousness and the responsiveness of the diver.

Gently shaking the shoulder provides a tactile stimulus, making it more likely to awaken the diver if they are in a state of unresponsiveness. Asking if they can hear you not only checks for responsiveness but also engages them in a way that can provide insight into their cognitive function. If the diver reacts positively, it’s an indication that they are at least somewhat conscious and aware of their surroundings, which is crucial for further assessments and potential assistance.

In contrast, simply shouting loudly at the diver can escalate the situation without providing any direct physical engagement, which might not be as effective in an emergency. Checking for breathing only ignores other aspects of responsiveness and misses the opportunity to communicate with the diver. Waving a hand in front of their face does not provide any physical contact or auditory stimulation and may not be sufficient to gauge their state of awareness. Therefore, the method of shaking the shoulder and asking for a response offers a comprehensive way to assess the diver's condition in a critical situation.