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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.

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2.   Cleared the mask.

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3.   Checked the mask.

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4.   Completed steps 1 through 3 within 9 seconds.

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5.   Resumed breathing.

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6.   Secured the mask hood.

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7.   Drank water while wearing the mask.

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8.   Removed and stored the mask.

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

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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