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031-503-1035 (SL1) - Protect Yourself from Chemical/Biological Contamination Using Your Assigned Protective Mask

Standards: Protect yourself from chemical or biological contamination using your assigned protective mask. Don, clear, and check your mask within 9 seconds. Drink water through your protective mask from your canteen without becoming a casualty.

Conditions:
You are given your assigned protective mask
with hood and carrier, a canteen with an M1
canteen cap, an M291 skin decontamination
kit, an M295 decontamination kit, M8
detector paper, and applicable technical
manuals (TMs). You find yourself in one of
the following situations:

  1.   You
    hear or see a chemical or biological
    (CB) attack.

  2.  
    You
    realize, through other means, that you
    are under a CB attack.

  3.  
    You
    are ordered to mask.

  4.  
    You
    must enter a contaminated area.

After
having donned your protective mask, you need
to drink from your canteen.

Standards:
Protect yourself from chemical or biological
contamination using your assigned protective
mask. Don, clear, and check your mask within
9 seconds. Drink water through your
protective mask from your canteen without
becoming a casualty.

Performance
Steps

1.   Don the mask as quickly as possible.

a.
Stop breathing and close
your eyes.

b.
Remove your helmet.

(1) 
If you have the M17-,
M24-, M25-, M40-, M43-, or
M45-series protective mask, put
your helmet between your legs
(above your knees) or hold your
rifle between your legs and place
your helmet on the muzzle. 
If you drop your helmet,
continue to mask.

(2) 
If you have the
M42-series protective mask, remove
your helmet and place it in a
convenient location. Avoid placing
it on a contaminated surface if
possible.

WARNING:
Do not wear contact lenses with the
protective mask. 
Remove contact lenses when the
use of chemical agents is imminent

c.
Take off your glasses if
applicable.

d.
Open the mask carrier
with one hand.

e.
Grasp the mask assembly
with your other hand, and remove it
from the carrier.

f. 
Put your chin in the chin
pocket, and press the facepiece
snugly against your face.

Note. The temple and forehead straps have already been
adjusted during fitting.

g.
Grasp the tab and pull
the head harness over your head. 
Ensure that your ears are
between the temple straps and the
cheek straps.  Ensure that the head harness is pulled far enough over so
the forehead straps are tight.

h.
Use one hand to tighten
the cheek straps, one at a time,
while holding the head pad centered
on the back of your head with the
other hand. Ensure that the straps
lay flat against your head.

2.   Clear the mask.

a.
Seal the outlet valve by
pushing in on the center of the
outlet valve cover with one hand.

b.
Blow out hard to ensure
that any contaminated air is forced
out around the edges of the
facepiece.

3.   Check the mask.

a.
Cover the inlet port of
the filter canister (M40- and
M45-series) or the inlet port of the
armor quick disconnect (M42-series)
with the palm of your hand, and
breathe in.

b.
Ensure that the facepiece
collapses against your face and
remains so while you hold your
breath (indicates that the mask is
airtight).

c.
Remove any hair,
clothing, or other matter between
your face and the mask if the
facepiece does not collapse to your
face.

d.
Notify your nuclear,
biological, and chemical (NBC)
noncommissioned officer (NCO) in
charge if it still does not
collapse.

4.   Complete steps 1 through 3 within 9 seconds.

5.   Resume breathing.

Note.  There are
no time standards for donning the
hood.

6.   Secure the mask hood.

CAUTION:
Be careful when pulling on the hood,
because it could snag on the buckles
of the head harness and tear.

a.
If you have the M17-,
M25-, M42-, or M43-series protective
mask, pull the hood over your head
and zip the front closed to cover
all bare skin.

b.
If you have the M24- or
M45-series protective mask, pull the
M7 hood over your helmet and head so
that it covers your shoulders.

c.
If you have the
M40-series protective mask, don the
hood so it lies smoothly on your
head.

(1) 
For masks equipped with
the regular hood–

(a)  
Grasp the back edge
of the hood skirt.

(b)  
Pull the hood
completely over your head so it
covers the back of your head,
neck, and shoulders.

(c)  
Zip the front of the
hood closed by pulling the
zipper slider downward.

(d)  
Tighten the drawcord.

(e)  
Secure the underarm
straps by fastening and
adjusting them.

(f)   
Put on your helmet.
If you have a combat vehicle
crewman (CVC) helmet-

1 
Disconnect the boom
microphone from the helmet.

2 
Connect the mask
microphone to the receptacle in
the helmet.

3 
Grasp the helmet next to
the ear cups, with your hand
spread as far as possible.

4 
Place the helmet over
your head, tilting the helmet
forward slightly so the first
contact when putting it on is
with the forehead surface of the
mask.

5 
Rotate the helmet back
and down over your head until it
is seated in position.

(g)  
Close your mask
carrier.

(h)  
Continue your
mission.

(2) 
For masks equipped with
the quick-doff hood-

(a)  
Place your hands
inside the hood, and expand the
elastic gathering around the
neck of the hood.

(b)  
Stretch and carefully
pull the hood over your head so
the hood covers your head, neck,
and shoulders.

(c)  
Fasten and adjust the
underarm straps.

(d)  
Put on the helmet. 
If you have the CVC
helmet-

1 
Disconnect the boom
microphone from the helmet.

2 
Connect the mask
microphone to the receptacle in
the helmet.

3 
Grasp the helmet next to
the ear cups, with your hand
spread as far as possible.

4 
Place the helmet over
your head, tilting the helmet
forward slightly so the first
contact when putting it on is
with the forehead surface of the
mask.

5 
Rotate the helmet back
and down over your head until it
is seated in position.

(e)  
Close your mask
carrier.

(f)   
Continue your
mission.

WARNING:
Do not connect the quick-disconnect
coupling half to your canteen until
all surfaces are free of
contamination. 
Chemical contamination could
enter your mouth, resulting in you
becoming a casualty.

Do
not break the mask seal while drinking
from the canteen.

7.   Drink water while wearing the mask. (Does not apply
to M17- or M24-series masks.)

a.
Press in on the top of
the outlet valve cover until the
internal drink tube can be grasped
between your teeth.

b.
Steady the mask assembly,
and pull the quick-disconnect
coupling out of the outlet valve
cover.

c.
Flip open the cover on
the M1 canteen cap.

d.
Push the quick-disconnect
coupling into the canteen cap so
that the pin enters the
quick-disconnect coupling.

WARNING:
If resistance is not felt, your
drinking system is leaking. 
Do not drink. 
Replace your canteen. 
If resistance is still not
felt, notify your NBC noncommissioned
officer (NCO).

e.
Blow to create positive
pressure. 
You should feel some
resistance.

Note.  Do not tilt
your head back while drinking.

f. 
Raise the canteen upside
down, and drink if the system does
not leak.

g.
Stop drinking after
several swallows, and lower the
canteen. 
Blow into the internal drink
tube to prevent the canteen from
collapsing. 
Repeat the drinking procedure
as required.

h.
Disconnect the drinking
system according to the appropriate
TM.

8.   Remove and store the mask according to the
appropriate TM.

9.   Perform all steps in sequence without becoming a
casualty.

Evaluation Preparation: 

Setup:  Evaluate this
task during a field exercise or a tactical
training session. 
Use a mask previously fitted to the
soldier’s face. 
The soldier will bring his flight or
CVC helmet. The soldier should be in MOPP4. 
Do not use a new decontamination kit
for every soldier; use the kit as long as
possible.  Ensure that the soldier has M8 detector paper in the mask
carrier before testing. 
If the soldier has not made adequate
progress towards drinking from the canteen
after 2 minutes, stop him and give him a NO
GO.  This
time standard is administrative.

Brief
Soldier: 
Tell the soldier to stand while
wearing his mask carrier containing his
assigned protective mask with hood attached. 
If applicable, tell him to remove his
eyeglasses and/or contact lenses before
starting the evaluation. 
Provide the soldier with one of the
scenarios described in the conditions
statement (cue to begin masking). 
Tell him to keep the mask on until
you issue the all-clear order. 
Tell the soldier that all time
standards are for administrative (noncombat)
evaluation purposes only. Tell him to drink
water while wearing his assigned mask. 
Tell him that there are no time
standards for this task; but for testing
purposes, he should be able to drink within
2 minutes.

Performance
Measures

GO

NO
GO

1.   Donned the mask as quickly as possible.

2.   Cleared the mask.

3.   Checked the mask.

4.   Completed steps 1 through 3 within 9 seconds.

5.   Resumed breathing.

6.   Secured the mask hood.

7.   Drank water while wearing the mask.

8.   Removed and stored the mask.

9.   Performed all steps in sequence without becoming a
casualty.

Evaluation
Guidance: 
Score the soldier GO if all
performance measures are passed. 
Score the soldier NO GO if any
performance measure is failed. 
If the soldier fails any performance
measure, show what was done wrong and how to
do it correctly.

References

 

Required

Related

 

FM
3-3

 

 

FM
3-4

 

 

TM
3-4240-279-10

 

 

TM
3-4240-280-10

 

 

TM
3-4240-346-10