Which of the following is NOT listed as a key task for CBRN reconnaissance?

• A. Mark the hazard
• B. Decontaminate
• C. Survey the area
• D. Report the hazard

Answer: (B)

In CBRN reconnaissance, the priority is to quickly identify and convey information about a hazard so protective actions can be taken. This means locating the hazard, noting its location and characteristics, marking it so others can avoid exposure, surveying the area to understand the scope and potential spread, and reporting the hazard to command or responders so a plan can be formulated.

Decontamination, on the other hand, is an action aimed at removing contamination from people, equipment, or environments. It requires specialized procedures and teams and is a response/mitigation task rather than an information-gathering mission. Reconnaissance focuses on identifying and communicating what’s present and where it is, not on cleaning it up. That’s why the option describing decontamination is the one that is not listed as a key reconnaissance task.