What is the objective of investigators during rounds in a Toxic Gas casualty scenario?

In a Toxic Gas casualty scenario, the primary objective of investigators during their rounds is to ensure the "casualty" is secured. This means that they focus on confirming that the affected area is safe and that personnel are removed from harm's way. Securing the casualty is crucial because it not only protects the individuals who may be in immediate danger but also allows for a controlled environment in which further assessment and remediation can take place.

When investigators ensure that the casualty is secured, they are also indirectly laying the groundwork for subsequent actions, such as documenting gas levels or evaluating the damage caused. However, their first priority is to mitigate any ongoing risks associated with exposure to toxic gases, making the safety of personnel paramount.