Breathing Apparatus. cont'd

TM 9-1300-275/1

1-3.2.4 In any operation involving chemical agents or

1-3.2.1 When entering a closed space that contains a

chemical munitions, have at least two persons perform

toxic agent, or an area suspected of having highly toxic

the necessary steps. In addition, a third person should

concentrations.

be used as a safety observer, if possible. The safety

observer should be dressed in the same protective

1-3.2.2. At any time the presence of cyanogen chloride

clothing as the others to enable him to render immediate

(CK) is suspected.

assistance.

1-3.2.3 Whenever the term leader suspects the

available oxygen content is too low to support human

life, as when there is dense smoke, or fuel or solvent

vapors.