Nuclear, biological, and chemical (NBC) weapons can cause casualties, destroy
or disable equipment, restrict the use of terrain, and disrupt operations. You
must be prepared to fight and survive in an environment where NBC weapons have
been used.
This chapter prescribes active and passive protection measures that will
avoid or reduce the effects of NBC weapons.
This section describes the characteristics of nuclear explosions and their
effects on soldiers, equipment, and supplies, and gives hasty measures for
protection against nuclear attacks.
Blast produces an intense shock wave and high winds that create flying
debris. It may collapse shelters and some fighting positions.
Thermal radiation causes burns and starts fires. The bright flash at the
time of the explosion can cause a temporary loss of vision or permanent eye
damage if you look at the explosion, especially at night.
Nuclear radiation can cause casualties and delay movements. It may last
for days and cover large areas of terrain. It occurs in two stages: initial
and residual.
EMP is a massive surge of electrical power. It is created the instant a
nuclear detonation occurs and is transmitted at the speed of light in all
directions. It can damage solid-state components of electrical equipment
(radios, radars, computers, vehicles) and weapon systems (TOW and Dragon).
Equipment can be protected by disconnecting it from its power source and placing
it in or behind some type of shielding material (armored vehicle or dirt wall)
out of the line of sight to the burst. If no warning is received prior to a
detonation, there is no effective means of protecting operating equipment.
EFFECTS ON SOLDIERS
The exposure of the human body to nuclear radiation causes damage to the
cells in all parts of the body. This damage is the cause of "radiation
sickness." The severity of this sickness depends on the radiation dose received,
the length of exposure, and the condition of the body at the time. The early
symptoms of radiation sickness will usually appear 1 to 6 hours after exposure.
Those symptoms may include headache, nausea, vomiting, and diarrhea. Early
symptoms may then be followed by a latent period in which the symptoms
disappear. There is no first aid for you once you have been exposed to nuclear
radiation. The only help is to get as comfortable as possible while undergoing
the early symptoms.
If the radiation dose was small, the symptoms, if any, will probably go away
and not recur. If the symptoms recur after a latent period, you should go to an
aid station.
EFFECTS ON EQUIPMENT AND SUPPLIES
Blast can crush sealed or partly sealed objects like food cans, barrels,
fuel tanks, and helicopters. Rubble from buildings being knocked down can bury
supplies and equipment.
Heat can ignite dry wood, fuel, tarpaulins, and other flammable material.
Light can damage eyesight.
Nuclear radiation can contaminate food and water.
PROTECTION AGAINST NUCLEAR ATTACKS
The best hasty protection against a nuclear attack is to take cover behind a
hill or in a fighting position, culvert, or ditch. If caught in the open, drop
flat on the ground at once and close your eyes. Cover exposed skin and keep your
weapon under your body to avoid loss. If you know the direction of the burst,
drop with your head away from the burst. Stay down until the blast wave passes,
then check for injuries and equipment damage and prepare to continue the
mission. See chapter 2
for additional considerations in the building of your fighting positions.
Radiation is the only direct nuclear effect that lingers after the explosion.
As it cannot be detected by the senses, use radiac equipment to detect its
presence. Procedures for detection can be found in FM
3-12 and FM
21-40. When feasible, move out of the contaminated area.
If your unit must stay in the contaminated area, it is best to stay in a
dug-in position with overhead cover. When time does not permit constructing a
well-prepared overhead cover, use a poncho. Stay under cover. When the fallout
has finished falling, brush contamination off yourself and your equipment. Wash
yourself and your equipment as soon as the mission permits.
CHEMICAL AND BIOLOGICAL WEAPONS
Enemy forces have both chemical and biological weapons. These weapons may be
used separately or together, with or without nuclear weapons. Regardless of how
they are used, you must be able to survive their effects and continue your
mission.
CHARACTERISTICS OF CHEMICAL AND BIOLOGICAL
AGENTS AND TOXINS
Chemical agents are like poisonous pesticides, but are far more powerful.
They are meant to kill or injure you and are released to cover large areas. They
may be released as gases, liquids, or sprays. The enemy may use a mixture of
agents to cause confusion and casualties. Artillery, mortars, rockets, missiles,
aircraft, bombs, and land mines can deliver the agents.
Biological agents are disease-producing germs. They create a disease
hazard where none exists naturally. They may be dispersed as sprays by
generators, or delivered by explosives, bomblets, missiles, and aircraft. They
may also be spread by the release of germ-carrying flies, mosquitoes, fleas, and
ticks. The US Army does not employ these agents, but other armies may.
Toxins are poisonous substances produced by living things (such as snake
venom). Toxins are not living things and in this sense are chemicals. They would
be used in combat in the same way as chemical-warfare agents, and they may
disable or kill without warning.
EFFECTS ON EQUIPMENT
Chemical and biological agents have little direct effect on equipment. Liquid
chemical agents on your equipment can restrict its use until it is
decontaminated.
EFFECTS ON TERRAIN
Liquid chemical agents may restrict the use of terrain and buildings.
It is difficult to decontaminate terrain. When time permits, it is best to
wait for weather to decontaminate terrain naturally. Contaminated areas should
be either bypassed or, when protective equipment is worn, crossed. After
crossing a contaminated area, decontaminate yourself and your equipment as soon
as the situation permits.
EFFECTS ON SOLDIERS
Chemical and biological agents may enter your body through your eyes, nose,
mouth, or skin. They can disable or kill.
Liquid agents may be dispersed on you, your equipment, the terrain, and
foliage. The agents may linger for hours or days and endanger you when you are
unprotected.
Biological agents are hard to detect in early stages of use. If you find out
or suspect that the enemy is using biological agents, report it to your leader.
The M8 automatic chemical-agent alarm can detect the presence of chemical
agents in the air and produce an audible or visual signal. It will detect nerve,
blood, and choking agents. The M43A1 detects only nerve-agent vapor. The use and
maintenance of the M8 alarm is the responsibility of the unit NBC defense team.
DETECTION OF CHEMICAL AND BIOLOGICAL AGENTS
Your senses may not detect chemical agents, as most agents are odorless,
colorless, tasteless, and invisible in battlefield concentrations. However, you
can detect chemical agents by using the chemical-agent alarms and detection kits
found in each company (FM
21-40).
The ABC-M8 chemical-agent detector paper comes in a booklet of 25 sheets. It
is a part of the M256 chemical-agent detector kit. The paper sheets turn dark
green, yellow, or red on contact with liquid V-type nerve agents, G-type nerve
agents, or blister (mustard) agents, respectively they do not detect vapor, The
test is not always reliable on porous material such as wood or rubber. Many
substances (including some solvents and decontaminants) can cause a color change
in the paper, so such a change indicates only that a chemical agent may
be present. Positive detector-paper tests should be verified by testing with
chemical-agent detector kits.
The M256 chemical-agent detector kit is issued to squads. It is used to
detect dangerous vapor concentrations of nerve, blister, or blood agents. It
should be used when the platoon or company is under chemical attack, when a
chemical attack is reported to be likely, or when the presence of a chemical
agent is suspected.
ALARMS
If you recognize or suspect a chemical or biological attack, STOP BREATHING,
PUT YOUR MASK ON, CLEAR AND CHECK IT, AND GIVE THE ALARM set by your unit's SOP.
PROTECTION AGAINST CHEMICAL AND BIOLOGICAL ATTACKS
Protective Equipment. Your main protection against a CB attack is
your protective mask. It keeps you from inhaling chemical or biological agents.
Additionally, protective clothing will provide protection from liquid agents.
Protective clothing includes the mask with hood, the chemical protective suit
(overgarment), boots, and gloves.
Protection from Insects. The duty uniform and gloves protect you
against bites from insects such as mosquitoes and ticks that may carry
disease-causing germs. Keep your clothes buttoned and your trouser legs tucked
into your boots. Covering the skin reduces the chances of an agent entering the
body through cuts and scratches. It also keeps disease-carrying insects from
reaching the skin. Insect repellents and insecticides are effective against most
disease-carrying insects. High standards of sanitation also protect against some
insects.
Mission-Oriented Protective Posture. MOPP is a flexible system of
protection against chemical agents. Your leader will specify the level of MOPP
based on the chemical threat, workrate, and temperature prior to performing a
mission. Later, he may direct a change in MOPP according to the changing
situation.
The MOPP level determines what equipment you must wear and what you must
carry. The standard MOPP levels are shown in the following chart.
The best local defense against biological warfare is strict preventive
medical and sanitation measures and high standards of personal hygiene.
Chemical Attack. When an individual displays the symptoms of
chemical-agent poisoning, first aid must be given immediately to save his life.
Nerve agents. The symptoms of nerve-agent poisoning are difficult breathing,
drooling, nausea, vomiting, convulsions, and sometimes dim vision. The use of
atropine autoinjectors and artificial respiration are first-aid measures for
nerve-agent poisoning. If you have such symptoms, inject yourself with one
injector in the thigh. If symptoms persist, use another injector. The interval
between injections is 15 minutes. If you are unable to treat yourself, a buddy
must do it for you. He will inject three injectors at once and administer
artificial respiration, if necessary. No more than three atropine autoinjectors
will be given. Seek medical aid quickly.
Blister agents. The symptoms of blisteragent poisoning are burning sensations
in the skin, eyes, and nose. The symptoms may be immediate or delayed for
several hours or days, depending on the type of agent used. If blister agents
come in contact with the eyes or skin, decontaminate the areas at once.
Decontaminate the eyes by flushing them repeatedly with plain water. Remove
liquid blister agents from the skin by using the items of the M258A1 kit. If
burns or blisters develop on the skin, cover them with sterile gauze or a clean
cloth to prevent infection. Seek medical aid quickly.
Blood agents. The symptoms of bloodagent poisoning are nausea, dizziness,
throbbing headache, skin/lips red or pink, convulsions, and coma. If those
symptoms appear, hold two crushed ampules of amyl nitrite to the victim's nose.
If in a contaminated area and the victim is wearing the protective mask, insert
the crushed ampules inside the protective mask. If symptoms persist, repeat the
treatment, using two crushed ampules about every 4 or 5 minutes until normal
breathing returns or until eight ampules have been used. Breathing may become
difficult or stop. Seek medical aid quickly.
Choking agents. The symptoms of choking-agent poisoning are coughing,
choking, tight-ness of the chest, nausea, headache, and watering of the eyes. If
you have these symptoms, stay quiet and comfortable, but seek medical aid
quickly.
CHEMICAL-AGENT DECONTAMINATION OF SOLDIERS
AND INDIVIDUAL
EQUIPMENT
Use the M258A1 skin decontaminating kit to decontaminate your skim individual
weapons, and equipment. Instructions for the use of the kit are printed on its
container. This kit is especially made for skin decontamination however, you may
use it to decontaminate some personal equipment such as your rifle, mask, and
gloves.
The container for the M258A1 kit is a plastic waterproof case with a metal
strap hook for attaching to clothing or equipment. It contains three Decon 1
wipes and three Decon 2 wipes, sealed in tear-away envelopes. Each Decon 1 wipe
packet has a tab attached for night identification and to assist in removal from
the case.
CHEMICAL-AGENT DECONTAMINATION OF UNIT EQUIPMENT
Decontaminate key weapons with DS2 decontaminating solution, soapy water,
solvents, or slurry. After decontamination, disassemble weapons and wash, rinse,
and oil them to prevent corrosion. Decontaminate ammunition with DS2 solution,
wipe with gasoline-soaked rags, and then dry it. If DS2 is not available, wash
ammunition in cool, soapy water, then dry it thoroughly.
Decontaminate optical instruments by blotting them with rags, wiping with
lens cleaning solvent, and then letting them dry.
Decontaminate communication equipment by airing, weathering, or hot air (if
available).
BIOLOGICAL-AGENT DECONTAMINATION
Decontaminate your body by showering with soap and hot water. Use germicidal
soap if available. Clean your nails thoroughly and scrub the hairy parts of your
body. Wash contaminated clothing in hot, soapy water if it cannot be sent to a
field laundry for decontamination. Cotton items may be boiled.
Wash vehicles with soapy water (prefer ably hot). If possible, steam-clean
them using detergent.
Wash equipment in hot, soapy water and let it air dry.