TM 9-2350-247-10
OPERATE NBC AIR FILTER SYSTEM (M548A3) Continued
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2.
Turn NBC AIR FILTER switch ON.
NOTE
Hold your breath while you put on and seal protective mask.
Detailed information concerning the protective mask can be found in TM 3-4240-280-10.
3.
Put on M25A1 protective mask.
4.
Clear and seal M25A1 protective mask.
5.
Pull out boom microphone connector from receptacle on helmet. Plug in protective mask microphone connector to
receptacle on helmet.
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