This British Standard specifies requirements for telemetry systems intended for use during fire fighting, 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).

This British Standard is only applicable to telemetry systems incorporated with type approved respiratory protective devices (RPD) of which breathing apparatus (BA) is a significant element used by emergency first responders.