Self contained breathing apparatus
Overview
 
A self contained breathing apparatus, or SCBA, sometimes referred to as a Compressed Air Breathing Apparatus (CABA), air pack, or simply Breathing Apparatus (BA) is a device worn by rescue
Rescue
Rescue refers to responsive operations that usually involve the saving of life, or prevention of injury during an incident or dangerous situation....

 workers, firefighter
Firefighter
Firefighters are rescuers extensively trained primarily to put out hazardous fires that threaten civilian populations and property, to rescue people from car incidents, collapsed and burning buildings and other such situations...

s, and others to provide breathable air in an IDLH (Immediate Danger to Life and Health) Atmosphere. When not used underwater, they are sometimes called industrial breathing sets.
 
x
OK