5 Levels of MOPP
Reference FM 3-11.4 CHAPTER IV
ArmyStudyGuide.com would like to thank Jerry Freeman, Training Developer at Fort Knox and Mr. Dale Chapman of the Training Development Division at Fort Leonard Wood for pointing this site in the right direction by submitting the proper levels of MOPP..
IPE is issued to and inspected by
the individual and prepared for use.
Personnel carry their protective
masks with their LCE. The standard
issue overgarment and other IPE are
carried or are readily available. To
be considered readily available,
equipment must be carried by each
individual, stored within arm's
reach, or be available within 5
minutes; for example, within the
work area, vehicle, or fighting
position. Units in MOPP0 are highly
vulnerable to persistent agent
attacks and will automatically
upgrade to MOPP1 when they determine
or are notified that persistent NBC
weapons have been used or that the
threat exists for NBC weapons use.
The primary use for MOPP0 is during
periods of increased alert when an
enemy has a CB employment
capability, but there is no
indication of use in the immediate
future. MOPP0 is not applicable to
MOPP1. When directed to MOPP1, personnel immediately don the overgarment. In hot weather, the overgarment jacket can be left open and the overgarment can be worn directly over underwear and other IPE making up the individual MOPP gear (e.g., footwear covers, mask, and gloves are readily available or carried). M8 or M9 paper is attached to the overgarment, (carry the NAAK and decontamination kit or keep them at hand). MOPP1 provides a great deal of protection against persistent agents. The primary use for MOPP1 is when a CB attack in theater is possible. Personnel must remove contact lenses and wear protective mask optical inserts. Leaders also monitor hydration levels. For forces afloat, MOPP1 means IPE is available
MOPP2. Personnel wear and/or put on their footwear covers, overgarment, and the protective helmet cover. As with MOPP1, the overgarment jacket may be left open, but trousers remain closed. The mask with mask carrier and gloves are carried. The primary use for MOPP2 is when a CB attack in theater is possible. Personnel carry M8 and M9 paper, nerve agent antidotes, and decontamination kits or keep them at hand. Personnel wear the protective mask optical inserts and maintain hydration levels. For forces afloat, MOPP2 means that personnel begin carrying masks.
MOPP3. Personnel wear the overgarment, footwear covers, protective mask, and protective helmet cover. Again, flexibility is built into the system to allow for personnel relief at MOPP3, particularly in hot weather. Personnel can open the overgarment jacket and roll the protective mask hood for ventilation, but the trousers remain closed. The protective gloves are carried. The primary use of MOPP3 is for personnel operating inside areas where a chemical-agent contact hazard does not exist. MOPP3 is not appropriate if a contact hazard is present. At MOPP3, forces afloat don protective suits and boots and activate intermittent countermeasure washdown.
MOPP4. Personnel completely encapsulate themselves by closing their overgarments, adjusting all drawstrings to minimize the likelihood of any openings, and putting on their protective gloves. MOPP4 is used when the highest degree of protection is required, or if CB agents are present but the actual hazard is not determined. As with every other MOPP level, flexibility is built into the system to provide relief to the individual. Once the hazard is identified and risk assessment measures are employed, the overgarment may be left open.
Note: During coalition operations, US forces familiarize themselves with the protection levels used by personnel from other nations.