Which of the following is a method of CBRN surveillance?

Which of the following is a method of CBRN surveillance?

• A. Remote
• B. Stand off
• C. Direct
• D. Indirect

Answer: (B)

Stand-off surveillance focuses on gathering CBRN information from a distance, so responders can detect threats and monitor spread without entering a contaminated area. This distance-based approach uses sensors on aircraft, drones, satellites, or fixed installations to identify signatures like chemical plumes, radiological fields, or thermal anomalies while keeping personnel safe. Direct methods require on-site sampling and exposure, making them higher risk, while stand-off provides rapid, broad-area coverage and early warning.

Stand-off surveillance focuses on gathering CBRN information from a distance, so responders can detect threats and monitor spread without entering a contaminated area. This distance-based approach uses sensors on aircraft, drones, satellites, or fixed installations to identify signatures like chemical plumes, radiological fields, or thermal anomalies while keeping personnel safe. Direct methods require on-site sampling and exposure, making them higher risk, while stand-off provides rapid, broad-area coverage and early warning.