Which surveillance configuration involves detectors spread within a geographic space to monitor for CBRN incidents?

• A. Periodic
• B. Continuous
• C. Critical Node
• D. Area Array

Answer: (D)

Detecting CBRN incidents effectively over a broad area relies on having sensors distributed across the geographic space. An area array is exactly this setup: many detectors spread throughout a region so surveillance covers the entire area, catching releases quickly and allowing localization by comparing signals from multiple sites. This spatial distribution provides broad coverage and redundancy, which is essential for timely detection of dispersed incidents.

Periodic surveillance means sensors collect data at set times rather than continuous, which limits real-time broad coverage. Continuous surveillance describes ongoing monitoring but doesn’t inherently specify a wide geographic spread. Critical Node focuses on guarding specific high-value points rather than surveying the whole area. Area array uniquely emphasizes detectors dispersed across the space to monitor for CBRN events.