In the eight CBRN reconnaissance tasks, which term comes after Survey?

• A. Validate
• B. Mark
• C. Report
• D. Quantify

Answer: (B)

In CBRN reconnaissance, you first gather the situational picture by surveying the area to determine where hazards are and how they affect the terrain and routes. The next step is to mark the area, which communicates to all teammates and supporting units exactly where the hazards are and where safe paths or exclusion zones exist. This marking is crucial because it translates the initial information from the survey into visible, actionable guidance that protects personnel and sets the boundaries for subsequent work. Once the area is marked, teams can proceed to quantify contamination, validate findings, and report results with confidence, knowing the zone boundaries and hazard locations are clearly established. Quantifying or reporting before marking would either risk exposure or rely on uncommunicated, ambiguous information, so marking right after surveying is the logical next move.