What is the proper procedure for an unresponsive diver at the surface?

To address an unresponsive diver at the surface, the correct procedure involves approaching the diver, securing them to prevent any further risk, and administering rescue breaths if necessary. This approach is crucial because immediate assistance can greatly influence the outcome for an unresponsive diver. The first step is to ensure the diver is secured, which helps prevent them from slipping underwater or suffering additional injuries due to waves or other external factors.

Once secured, providing rescue breaths is essential as it can help restore oxygen levels in an unresponsive individual, potentially reviving them before professional help arrives. This step is critical and aligns with the principles of first aid and rescue designed to stabilize and support the diver until more advanced medical assistance can be obtained.

The other options do not adequately prioritize the immediate care that the diver requires. For instance, immediately calling for emergency services may delay the crucial first steps needed to support the diver. Starting to remove the diver's equipment can also pose risks and complicate the situation further, potentially leading to injury or delayed response to critical breathing needs. Leaving the diver to get help is not acceptable as it abandons the unresponsive individual when they are in dire need of immediate intervention.