This British Standard specifies requirements for dual-mode apparatus, combining two of the types of apparatus specified in BS 8468‑1, BS 8468‑2, BS 8468‑4, BS 8468‑6.1, or BS 8468‑6.2, intended to be

used during rescue, evacuation, escape, hazard containment and decontamination, and similar activities by emergency first responders (e.g. fire, ambulance, police, and associated civilian agencies and workers) in areas containing and contaminated by chemical, biological, radiological and nuclear (CBRN) agents.