MIL-STD-1805A, MILITARY STANDARD: BREATHING APPARATUS, SELF-CONTAINED, 30-MINUTES (08-APR-1991) [NO S/S DOCUMENT]

MIL-STD-1805A, MILITARY STANDARD: BREATHING APPARATUS, SELF-CONTAINED, 30-MINUTES (08-APR-1991) [NO S/S DOCUMENT]., This specification covers 30 minute self-contained breathing apparatus for respiratory protection in oxygen-deficient, toxic, or smoked filled atmospheres containing hazardous vapors or gases.