AHOY,
Friday, May 17, 2013
Post # 17, Defense, rule # 4
AHOY,
FRAGMENTED FIGHTING FACTS
Defense
Basic rule # 4
Update; 06/06/13 08:36 hours, this was a web site I happen to
find a while back, it is tilted “a view from the back of the envelope”
I well prove a link below. I’m sure that anyone with the basic math skills I do
not have well benefit much more from this site than I did i.e.find your own
take a ways. And yes I deleted the green highlight for the older updated knowledge.
Note
here with any and all weapons data, I could have color coded all that data in “pink”. I would hope patriots
would consider all of it suspect i.e. don’t bet your life on it. I recall when
I was serving, during a class on the new mortars i.e. M224s. We were told that
you could basically double the range and other figures. This particular
improvement was due to the new powders being used i.e. charges. Not to mention
all the other design improvements.
4) Position main
weapons:
This is most effective weapon
located in most advantageous point or centrally located to allow access to
multiple points, to cover points of interest, avenues and passages. (NOTE on a
personal basis this could be placing weapon in a central hallway of a house, so
someone could get to it and make their way to any area or room). If more than
one weapon available do not bunch them up. Concentrate fire power not weapons.
Crew serve weapons covered/concealed to prevent detection i.e. keep enemy form
locating them or damage during preparation fires.
(Reference,
mortars/secondary observation posted below.)
The primary consideration
impacting on the employment of machineguns within built-up areas is the limited
availability of long-range fields of fire. Although machineguns should be
emplaced at the lowest level possible, grazing fire at ground level is frequently
obstructed by rubble. When mounted on a tripod, the .50 caliber machinegun can
be used as an accurate, long-range sniper weapon. BGM – 71 TOWs and DRAGONs;
within built-up areas, they are best employed from the upper stories of
buildings in order to attain long-range fields of fire. Elevated firing
positions also increase the first-round hit probability. Firing down at a tank
from an angle of 20 degrees increases the chance of a hit by 2/3 at 200 meters.
A 45-degree angle doubles the first-round probability of a hit when compared to
a ground level shot. Their minimum firing ranges of 65 meters (214 ft) may
limit firing opportunities in dense built-up areas (max range is 2 1/3 miles,
with muzzle velocity of 278m/s or 917 ft/s). The maximum depression and
elevation limits of the TOW mount well result in dead space and hinder close
engagements. When deciding whether to dismount TOWs, the commander must weigh
the advantage of more flexible firing envelopes against the disadvantage of
losing mobility. The portable TOW requires considerable time and effort to move
launcher and missiles from position to position. The best technique may be to
detach TOWs to units detailed to operate on the periphery of the built-up area,
rather than to those within it. Note rocket burn and maneuverability at close
range. The DRAGON is lightweight and easily moved. Dragons and LAWs; because of
their light weight and mobility, can attain effective short-range shots and
catch the tank in a situation where it cannot counter fire. Since the LAW
warhead is less lethal than those of the other antitank weapons, multiple hits
are necessary. LAWs should be used in volleys, pairs, or sequences. Back blast
is an important limiting factor when employing antitank weapons in MOUT.
Curtains and overstuffed furniture in the back blast area should be left in
place to help absorb sound. Combustible material must be removed from the back
blast area. All small loose objects and window/door glass must be removed. In
all cases there must be 20 square feet (2 square meters) of ventilation to the
stern of the weapons. An open door will normally provide adequate ventilation.
For ATGMs, the following vertical clearances between the bottom of the launch
tube and the firing aperture are required. The enclosure must be of sturdy
construction with a ceiling at least 7 feet (2.1 meters) high. Everyone in the
room must be forward of the exhaust pipe of the weapon and must wear helmets
and earplugs. Anti structure Role While they are designed and employed
primarily to defeat enemy armor, they may also be used when required to attack
structures or fortified targets. WWII Anti-tank guns posed something of a
problem. Their main role in an offensive action was to be ready to
respond to an enemy counterattack including armor. They were too
vulnerable and unwieldy in the towed version to accompany the assault troops,
largely necessitating their being held back along with the reserve. They
would be pushed forward following a successful action to help consolidate the
objective, but if they were used in the initial firefight they risked exposing
their position to enemy observers.
(Reference, Step #
2, Company Cmdr, Reserves i.e. post # 12 or this series)
The following table summarizes the penetration capability of antitank
weapons.
Depth of penetration for armor;
Figure in feet then meters.
WEAPON EARTH REINFORCED STEEL
CONCRETE
TOW
8/2.6 4/1.3 1.33/.4
Note TOW 24 inches or two feet to 40 inches or 3.3 feet of armor.
DRAGON
9/2.6 4/1.3 1/.3
LAW
6/1.9 2/.6 .67/.2
90mm HEAT
3.5/1.1 2.5/.8 .83/.3
NOTE: Penetration does not
necessarily mean destruction of the structure.
Against sandbagged
emplacements, antitank weapons should be aimed at the center of the porthole
i.e. aperture. Even if the round does not go through the aperture, the bunker's
walls are easier to penetrate at the apertures.
Against structures, AT
weapons should be aimed about 6 inches below or to the side of an aperture.
This will increase the fragmentation effect and enhance the probability of
killing soldiers behind the wall.
Mortars;
Mortars; Terrain
masking by buildings in MOUT is an important consideration. Mortars are the
least affected because of their high-angle trajectory. Mortars can also be
fired from between tall buildings. Not wanting to give away their location the
mujahedeen staggered there rockets. During Mountain or MOUT operations mortars
are placed on a layer of branches not directly on frozen ground, ice or
concrete. Because of radar mortars must be fired from bunkers. Position mortars
under the streets to fire through a manhole, muzzle close to opening. Test fire
the mortar, with dummy round. Can be dug in to depth of 10 feet for cover and
concealment with the right surface. In MOUT, on hard surfaces mortar aiming
stakes can be placed in cans filled with dirt or use knifes etc. Mortars are
the main indirect-fire support for forward units in MOUT. Fixed winged CAS and
Artillery is often precluded because of blast radius. Due to cover afforded
defending forces in MOUT and after enemy has broken though lines accurate
indirect fire is of greater importance. Target priorities are given to streets
especially intersections and other open areas. WP rounds should impact on or
behind building so enemy cannot escape in smoke. Proximity fuses used against
roof top targets. With MT. mortar rounds will penetrate snow blanket if
proximity fuses are not used. Spongy ground of north in summer has a smoothing
effect on all fire from all types of weapons hard frozen bare ground or ice
when not covered by snow frozen clogs of dirt increases fragmentation effects.
MT due to supplies of ammo targets and allotments are important one exception
would be units detailed to cover narrow passages. Other target examples, large
snow mass or rocks above enemy location.
WWII Fire support; at the
start of the war the light 51 mm type mortar was a popular support weapon,
versions equipping British, German and Russian Platoons. By 1942/43 only
the British retained their 2 inch model in the role. Such weapons were
intended to deliver explosive rounds, but these proved of minimal tactical
benefit, and the British increasingly used theirs to provide a smokescreen.
In WWII the Mortar Platoon
was invariably the single most powerful element of the Infantry Battalion.
Dependent upon the particular model and ammunition, it could project fire
anywhere between 2400 and 3000 meters, close to a maximum of two miles. (Note
modern US M252 81mm, min 83m or 273ft. max 5935m or 3.7 miles).
Fire control could be
exercised in one of two ways, through a fixed observation post or a mobile fire
controller, but ideally a combination of the two was used (note today add UAV
and other aerial sensors). Danger close for most Artillery is 50 meters.
And 600 feet for 500 lbers. Bracketing targets in your own city is stupid?
The WWII mobile fire controller (MFC) took the principle one stage further.
Again drawn from the Platoon, he would accompany the Headquarters of a Rifle
Company operating further forward of the established OP. He would be linked by
radio to the mortar position and undertook largely the same role as the
observer, correcting fall of shot. However, his presence with the Rifle Company
allowed him to call in fire missions to engage targets of opportunity or help
overcome stubborn points of resistance out of sight of the OP. Without Ops
the only solution to such shortcomings was either to push the weapons forward
so the crews could see their targets, ignoring a major strength of the mortar
i.e. shooting from defiles, or restrict support to rigid fire plans on
pre-determined positions, severely limiting the potential for engaging targets
of opportunity. Exploitation
phase; where an attack succeeded it would open the gap between the
mortar positions and the leading riflemen. To continue effective support fire,
the mortars had to close that gap by moving forward. This could not be done by
the whole Platoon at once, less the Battalion be entirely deprived of its fire
for the duration of the movement. Rather, the Platoon would relocate by
Sections, perhaps regrouping around the base of fire provided by an already
detached forward Section operating with a Rifle Company. In the
withdrawal, the Platoon would again relocate by stages. The advantage
was of course that the route and new positions would have been well prepared
beforehand. Supplies of ammunition could be located at both the current and
secondary sites, allowing the mortars to move quickly into action on arrival at
their new home.
Secondary observation posts would likewise be prepared. In static situations, the
Mortar Platoon would be loathed to fire from its main position prior to a major
assault, as this would inevitably reveal its location to enemy observers.
Detachments and Sections could however launch harassing strikes from temporary
sites before removing themselves quickly to avoid the inevitable retribution.
Such ‘shoot and scoot’ missions would have to be performed well away from the
dug in riflemen to spare them the retaliatory bombardment. These tactics could
also be used to support fighting patrols gathering information on enemy
dispositions, as well as outposts subjected to probing attacks. (Note all the
above would be the Taliban methods today).
The M224 can fire 120 rounds in four minutes - a three-man crew can
have 15 to 20 rounds in the air before the first round impacts. Minimum range
with zero charges 70 meters. Maximum range four charges 2400 meters. Minimum
elevation 1200 mils i.e. 67%. 2011“The new system is made out of what’s called
an inconel alloy metal on the cannon which is lighter weight and has better properties
at high heat,” the old system weighted about 40-45 lbs. the new alloy has
reduced that by about 9 lbs.
A
field-expedient means of measuring the river's width is with a compass. While
standing at the waterline, fix your sight on a point on the opposite side and
note the magnetic azimuth. Move upstream or downstream until the azimuth
reading to the fixed point on the opposite bank is 45 degrees different than
the original reading. The distance from the original point to the final point
of observation is equal to the river's width (see Figure 7-6). Note IMO this would also be useful for determining distance to
targets. Using a back azimuth to the original point would provide best accuracy
over all.
Not only are crew served weapons
heavy, each requires several times its own weight in ammunition.
(Reference, Step # 2 Leadership
guidelines, Squad leader, and especially Co. cmdr. “The Reserves”, And COE rule
# 3, including maneuvers and formations. That would be Post # 12 and #15 in
this series of posts.)
Update;
06/06/13, this knowledge would relate to the knowledge above starting with “A
field-expedient means of measuring…”
“Let
no Marines ghost say if my training had only done its job”
"
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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