Monitoring in CBRN operations refers to the act of:

Monitoring in CBRN (Chemical, Biological, Radiological, and Nuclear) operations is fundamentally about detecting and measuring the presence of hazards within the environment. This process involves using specialized detection equipment to identify the types and concentrations of hazardous substances, which is crucial for assessing risks to personnel and the surrounding population.

Accurate measurement helps inform decision-making regarding safety protocols, potential evacuations, and mitigating strategies that need to be implemented to address any threats posed by the detected hazards. By effectively measuring the presence of these substances, responders can ascertain the level of contamination and determine appropriate responses.

In contrast, the other choices involve different aspects of operational response. Eliminating hazards refers more to remediation efforts rather than monitoring. Reporting and analyzing situations focus on communication and understanding the context of the threat, while surveying and documenting findings pertain to record-keeping and subsequent evaluation rather than immediate detection and measurement.