Chemical, Biological, Radiological and Nuclear Defense

Nuclear, Biological, and Chemical 

Nuclear, Biological, and Chemical (NBC) Defense Systems

Awareness of a CBRN hazard results in warning, alerting, and reporting that provide hazard data which is key to decentralized operational decisions at all levels within the joint force. Awareness allows for the rapid warning and alerting of affected personnel who employ CBRN protective equipment and mitigation capabilities to negate the effects of the CBRN incident and help sustain operations. The JFC processes this awareness of a CBRN incident to gain an understanding of its implications to joint operations.

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The threatened or actual employment of chemical, biological, radiological, and nuclear (CBRN) material, including toxic industrial materials (TIMs), can seriously challenge US military operations. The deadly, destructive, and disruptive effects of these weapons and materials merit continuous consideration by the joint force commander (JFC) and supporting commanders.


CBRN-related protection includes measures that are taken to keep CBRN environments from having an adverse effect on personnel, equipment, or critical assets and facilities. Commanders implement protective measures appropriate to all anticipated threats, including terrorist threats and the use of WMD/CBRN or other sources of CBRN hazards. CBRN defense typically requires WMD active defense and CBRN passive defense and requires the planning, preparation, training, and execution of physical defenses to negate the effects of CBRN elements on personnel and materiel.


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