What is the first step a rescuer should take upon identifying a situation where a diver is missing?

The first step a rescuer should take upon identifying a situation where a diver is missing is to alert the dive supervisor and implement a search plan. This approach is crucial because it ensures that the situation is managed systematically and safely.

Engaging the dive supervisor allows for a quick assessment of the situation, helping to gather essential information such as last known position, dive profiles, and any potential hazards in the area. This collective awareness is vital for orchestrating an effective search operation. Implementing a structured search plan facilitates coordinated efforts, maximizes resources, and ensures that safety protocols are adhered to, reducing the risk for both the rescuer and other divers.

Taking immediate action without proper coordination, searching alone, or waiting for additional help can create confusion, increase risk, and diminish the chances of a successful rescue. Therefore, the emphasis on communication and structured action through a designated supervisor is critical in emergency situations like this.