self-contained compressed-air-operated breathing apparatus
1
SCBA
a device enabling an individual to have air or oxygen independent of the atmosphere in which he is working; device which provides complete respiratory protection in any concentration of toxic gases and under any condition of oxygen deficiency; a face mask or helmet supplied with air for breathing from a cylinder of compressed air. The cylinder forms part of the apparatus and is carried by the user. Such apparatus is used for activities carried out in spaces filled with smoke or noxious gases or air deficient in oxygen