Update; 06/12/13 10: 39 hours this was just the title change.
Tuesday, May 21, 2013
Post # 26, Defense basic rule # 6
AHOY,
Update; 06/12/13 10: 39 hours this was just the title change.
Update; 06/12/13 10: 39 hours this was just the title change.
Fragmented Fighting Facts
Defense
Basic rule # 6
6) Choose and prepare
fighting holes:
As with clearing fields of fire (rule # 8) and camouflaging area you must
estimate time available not only to complete but remove if situation applies. Buildings with tin roofs make good positions, due to
anti fire properties. Avoid older structures, if these must be occupied,
extensive efforts are required to reduce the dangers of fire. Fires can double every 30 seconds
Smoke kills three
ways, blocking oxygen into system, toxic fumes, lack of oxygen i.e. consuming it
in the area.
Use the back of hand in a zig-zag patern when checking for
heat behind door etc.
Cover attic and other wooden
floors with one inch of sand or dirt. Position buckets of water or sand bags
for immediate use. Water
basins and bathtubs are filled. All electricity and gas are turned off.
Firebreaks are created by destroying buildings adjacent to position. Corners
and lower levels of buildings are stronger than elsewhere. Destroyed vehicles
make good fighting holes also existing craters caused by enemy or friendly
fires. Do not choose isolated trees or bushes.
Snow covered terrain. On the downwind
side of every obstacle, house, tree, or bush there is always a hallow, which
may provide an excellent observation point or fighting hole. The wind
particularly in open areas may form long wavy snow drifts and Snow banks alongside
plowed roads too. Either maybe used as an approach to objectives. Snow drifts
are less of a problem in forest on hills or slopes. When preparing fighting
holes you should team up, into teams of two or three. One for security one or
two for working. Time to prepare the defense may be the most critical factor in
selection of building or positions. Buildings that require extensive time
consuming reinforcements, fire prevention measures or clearing of fields of
fire should be avoided. With existing positions continuously improve, Marines
constantly preparing fighting position (also areas used during assaults) for
fallow on Marines. Add or remove rocks, dirt, sand bags, to fit your height.
Fighting holes should be as deep as mans armpits. Estimated average time to
dig, two hours. Stockpile extra sand bags in fighting holes as a fire-fighting
aid. Sand bags are filled uniformly ¾
full, tie straps placed in bags and facing inward. Alternate placement of bags.
Urban setting any structures
on the outside of a building that would assist scaling to gain access to upper
floors or to the roof are removed or blocked. Remove glass, leave curtains and
hang cloths in exits. Curtains and furniture cushions can reduce noises. Remove handrails and oil the stairs.
Put claymores on the roof.
Inter walls removed, blankets
hung to look like them. Clear walls for back blast 2 meters square hole. Open
door at minimum. Ceiling 2 meters higher than weapon. Barricading or boarding
up doors and windows leave many gaps. Avoid barricading only the windows to be
used. Making loop holes, neat square or circular shapes avoided. Try to preserve
looks of the outside. Have many false ones to conceal real. Should be cone
shaped on the inside i.e. increasing size inwardly. Covered on inside with
protective linings, such as an empty sandbag or wire mesh for protection from
splinters caused by incoming rounds. Brick walls especially splinter when hit
by bullets. The bottom should be loosened so grenades can be dropped outside.
Covered completely with sandbags when not in use, to prevent the enemy from
observing through them or keep enemy form detecting them. Conceal them behind
pictures, drapes, furniture and shrubs. Create loop holes in roofs chimneys,
mail drops, under door jams, under stairs though steps, though interior walls
placed to cover hallways and unoccupied rooms. Loopholes in floors permit the
defender to engage enemy on lower floors with small arms and/or to drop
grenades. Avoid firing directly through a loophole. Use table or chairs to fire
down from loop holes. Ground Floors, All doors not used by defenders are
locked, nailed shut, and blocked with furniture or sandbags. Exit doors are
booby trapped. Hallways/Stairs not required for the defender's movement are
blocked with furniture and tactical wire. Floor level; if there is no
basement, fighting holes are dug into the floor for additional protection
against heavy direct-fire weapons. Frozen ground well provide better cover against artillery. Wet
down floors and blankets in front of crew serve weapons to reduce dust and
debris. Prone positions do not always permit sufficient freedom for firing at
widely varying angles or at targets above the position. Holes for elbows lower
profile. Weapons with top or side feed magazines or belts also reduces profile.
Firing stakes one stake at stern/shoulder, or in pistol grip to indicate base.
One left and one right to indicate left and right limits. Especially useful at
night. SP instead of aiming stakes carry several empty sandbags. These can be
filled on the spot (and emptied when it is time to move). Cross fields of view
as will as fires. They should intersect at perimeter in the range of 33 yards.
Purpose provides mutual support between adjacent units, reduces number of gaps
in final protective fires. Perimeter should be convex i.e. curved slightly
inward. As enemy approaches sides they come under increasing cross fires.
Interlocking machine guns, located at corners to give greater chance to attack
enemy’s flanks or stern. Crew served weapons produce the most KIA. The close
proximity of others in the crew, which assists with ammo, provide security and
the fire power of the weapon, reassures and helps suppress anxiety. Individuals
tend to seek cover and not fire. Construct grenade slumps. These are made to
absorb explosions of grenades. Floor is angled towards one corner where a hole
is located. This has a small entry point only large enough for hand and length
of arm to inter and hallow out cavern at base. Or there is the roof style type;
floor is slanted from center in two directions like roof, with deep narrow
gutter trench, surrounding edge of floor. In MOUT netting, sheets, fencing or
chicken wire can be used to give some protection too. Wire screening (chicken
wire) is preferable to camouflage netting because it will not burn readily.
Camouflage floors with vegetation to conceal from air; do not use twigs or
branches. Grenades that fine their way into your fighting hole well not roll
into grenade slumps. In MOUT floors can be greased down or ball
bearings/marbles used to cover floor, Marines would ware crampons or cleats.
Rubbling certain parts of the building provide additional cover and concealment
for weapon emplacement.
Positions with flat-roofs
require anti-helicopter obstacles. Roofs accessible from adjacent structures
are covered with tactical wire and guarded. Entrances to the building from the
roof are blocked. Each position should have complete overhead and perimeter
protection. Sand bag floors and or table tops over your position. Ceilings are
reinforced with supports, all done to withstand the weight of rubble from upper
floors. Removing or collapsing roofs, ceilings and floors, provides better
protection against indirect fires, if Marines can locate themselves around
large hole on upper floor or platforms extending from walls above ground level.
Over head cover having (sun roof) for throwing grenades. When Marines expected
to remain in area for a while equipment must be covered also with fighting
holes in the field, tunnels are dug for protection from indirect fires. With
snow structures use sticks for checking thickness of walls. Positions are made
to appear flat when observed from ground level, or form air. Cover should blend
in with the natural surroundings, vegetation and elevations. Smoothing
cover/roofs by packing the snow (must be rounded off) in order to eliminate any
sharp features that may produce shadows or reflections.
Vegetation can be exposed through top of
netting or tarps. Surrounding
vegetation i.e. living vines are pulled over the emplacement. The halve shelter
the black triangle formed by the interior shadow can be seen a long way off,
especially from the air. Conceal it by striking the front tent pole or by
covering the opening and the outline of your tent with natural materials. Never
pitch a shelter tent in daylight unless you are ordered to do so. The
flat-top is an answer to the problem of concealing dug-in machine-gun
positions. The simple flat-top requires no framework. Corner posts are not
driven; they rest on the ground and are held in place by double strands. The
whole structure is as low to the ground as possible. It can also be angled
towards higher background, to best blend in with back ground. For a deliberate
position, especially in terrain with natural foliage, the folding buggy-top
conceals the machine gun which has an antiaircraft or all-around fire mission.
It can be folded back quickly, allowing the gunners to engage aerial targets.
For hinges use cloth or pieces of scrap leather, or stock door
hinges. Take care that the vegetation around the position is not
compressed by the buggy-top when it is open. Also in a deliberate
position, the swinging flat-top (Figure 64) is a slightly more elaborate
flat-top for anti-aircraft machine guns. It is a cantilever structure hinged on
a post at one corner. It is easily pushed to one side, giving the gun an
unobstructed view of the sky.
Image edited
Advantages of snow,
protection from wind for engines when snow walls are built. Easy to dig
trenches for communications. Trenches each Marine assigned a certain number of
feet to prepare. As a rule observe odd numbers. Trenches covered with branches
just before fresh snow fall to camouflage. Layer of branches, leafs placed
under first layer of logs around fighting hole, to keep water from leaking in.
Pykrete: Ice and sawdust mixture much stronger and melts much slower than
regular ice. It is bullet resistant. And will actually float. There is also Ice
create, water mixed with dirt, sand, gravel/rocks can be poured into wood forms
and tamped, as it is poured. It is darker than ice or snow absorbs more heat.
And therefore will melt quicker. You can cover it with snow, this well also
reduce ricochets and provide camouflage. It will need repairs after fired upon.
Encasement walls hollow interior filled with sand to absorb shock from
battering rams. Also would have impeded entry by troops, sand harder to remove
than bricks. Ground held to gather by roots of vegetation grass etc cut into
bricks. Salient prominent conspicuous jutting walls curved around entrances,
gates etc. Wide latus apparatus principle to block entrances also Claviculae
(little hooks). Fighting holes constructed facing backwards, meaning in
direction enemy will be traveling. So he walks right over into ambush. When
position complete always view from foes view point. Penetration
table: They
had prepared boxes, containing wood, brick, earth and sand. From 100 yards,
only the sand stopped it. On average bullets well pass through 13’ of newly
fallen snow. If firmly frozen 8-10’, packed 6’, ice 3’, Pykrete or ice create
1½’. 18 inch thick walls of Afghan homes said to widthstand m-16s. Altitude
higher oxygen less, ice becomes harder/concrete too. Body armor weight 9 oz per
square inch, will stop 25, 22, and 38 caliber. 20oz for 9mm and 44 magnums.
M-16A1 and A2 both weapons perform the same at 50m or less. The closer the
range less penetration. At ranges of 25 m or less pent. greatly reduced. Round
still yawing, angled at impact. Well ricochet or break up. At less than 50 m.
5.56 stopped by 18”-24” layer of books, one thickness of sandbags, 2” concrete,
and 55 gallon drum filled with water or sand. Car door /body will inter may not
exit. Over all at 45 degree angle ricochet percentage increases greatly. Rounds
can ricochet on glass at a 45 degree angle. M16A1 maximum penetration is at 200
m. Pent. 120 mm. also 14 acrylic glass plates 1” thick each. 5.56 mm pent two
plates/2”, 7.62 four plates and kinetic energy knocked all other plates down.
Kevlar first developed 1970s for tires. Protection approval ratting, 2”
diameter 44 cu mm max trauma/damage allowed. #5 boron carbine hardest ceramic
mat known. Dragon skin ceramic desk material MFG company pinnacle armor in
California.
SP 1/2000; troops are currently provided with the 20-year-old flak
jackets which can stop shrapnel (not bullets). Added plates can stop 5.56mm
bullets, but increase the weight to 25 pounds. The Interceptor jackets weigh
less (only 16 pounds including their ceramic plates). They can stop shrapnel or
9mm bullets; the added ceramic plates can stop 7.62mm rounds.
M-16 well not pent. 8” of pine, at 28 yards the AK – 47 well.
SP Oct 2000; USMC MACHINE GUN TACTICS; "talking guns"
tactic, two machine guns work in tandem. Each fires a short burst, then waits to
hear the other before firing again. The doctrinal rate of fire is a burst of
6-8 rounds followed by a pause of 6-8 seconds. This ensures the bursts are
six-eight seconds apart. As a practical matter, if friendly troops are not
exposed while advancing on the target, a pause of 10-12 seconds will be
adequate to keep the enemy pinned down. This doesn't really help when the guns
are firing on different targets, although it does help each gun maintain its
timing. It would be better to train each gun crew to count its own intervals as
it is difficult in combat to hear clearly what the other gun crew is doing. There
is also a tendency of one gun to increase its rate of fire when the second is
reloading. One trick is for one gun to start with a 100-round belt and the
other with 200 rounds. After firing the initial belt, each gun uses 200-round
belts. This staggers reloading cycles. Doctrine calls for the gunner's
left hand to remain on the elevating wheel of the traversing & elevation
mechanism. This allows the gunner to adjust the fall of his rounds as needed or
as directed by the team leader. Without intense training, however, the gunner
has a tendency to move his hand back to the gun after each adjustment. This
makes the weapon less stable and harder to adjust quickly. Training technique;
tape a laser pointer to a cleaning rod. Insert this into the barrel of the weapon
when dry firing inside a dimly-lit armory the team leader can track the
abilities of the gunner to aim and adjust his weapon. The training of gun
teams (on a static firing range) tends to make them think they are fighting
alone rather than as a part of a platoon. Troops must be trained to
maintain situational awareness. During training maneuvers, the team leader
should periodically ask the team what else is going on around them to encourage
them to note the broader picture. When two machine guns are working together the
junior gun crew should be deployed farther forward than the senior crew. This
will allow the senior team leader to keep an eye on the other gun and
coordinate barrel changes and reloading. It could be hoped that at least 60% of
operations are offensive in nature, but 95% of machine gun training is in
defensive tactics and engagements. Gun crews should be trained in how to select
and occupy a firing position while remaining under cover. Gun crews should
carry empty sandbags to help them set up interim firing positions during an
advance. If they have access to a vehicle, they should have filled bags on the
floor to use and get the gun into action faster. Medium machine guns (M60
or M240) are not the same as heavy machine guns or Mark-19 grenade launchers.
Gunners moved from one system to the other require formal retraining in order
to establish the mindset. Medium guns use high rates of fire to suppress
positions or break up attacks. Heavy machine guns are best for attacking
vehicles or bunkers. Mark-19s are best when used to engage light armor, heavy
bunkers, or troops in defilade. Mark-19 grenade launcher crews need to remember
that they are one of the few weapons capable of engaging enemy forces behind
cover or in defilade If Mark-19 rounds are striking a target which other
weapons could engage and take out, something is wrong. Mark-19 ammunition is
bulky and should not be used when other weapons can do the same job. The 40mm
grenades will penetrate two inches of steel armor while .50-cal machine gun
rounds will penetrate only one inch, so if the target is lightly armored, the
.50 - cal may be the best weapon for the job.
Sp Firing tables at altitude are inaccurate and need to be redone.
Artillery ammunition storage and handling is very important in a dry,
hot environment.
Very hot ammunition will affect the ballistic solution, which will
cause the round to impact long or short of its intended target.
Digging in storage positions for ammunition will keep it cooler.
(Reference, Def. rule # 8 and COE,
Armor, “The factors of cover”)
This concludes this post Defense, basic rule # 6
" Give
me a million dollars and I well change the world"
" When
it comes to persecution and suffering that fairly tale about christ dose not
have (S) nothing on me"
" I well
bet my lucky start" IKYG
G-day!
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