Update; 06/12/13 10: 39 hours this was just the title change.
Thursday, May 30, 2013
Post # 50, Conduct of Engagements, rule # 13
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
Preparations and Conduct of Patrols
Basic rule # 13
13) Sweep against moving targets:
This is making target cross
your stream of fire. Note with stationary target make note of possible cover
target may seek before opening fire. Automatic weapons pull up and to the
right. Lead for targets running to your right is tricky. It may be generally
safer for you to make longer dashes to foe’s right. Note consider moving to Rule number four zig zag.
If engaged invaders may hide behind non-bulletproof objects like trees, just
shoot through each tree. They will run if engaged in the open be ready to get
off as many shots as possible..
With aircraft;
if the battlefield is quit Jets can be hard 20-30 seconds away. In urban
terrain it is difficult to tell direction however. Lead jets by 600’
helicopters by 150’, using the known aircraft’s length as a guide. Best chance
of success is a head-on position, aiming above the aircraft. However if the
aircraft is diving on your position. Do not fire at them, you well only give
away your position. Wait till it has pulled up. One option is the Exact
Rendezvous method, selecting a reference point i.e. concentrate fire on
hilltop. Massing fire along flight path junctions. For ambushes weapons i.e.
guns and RPGs should be located in tunnels, as an anti smoke tactic. With
aircraft farther away, at ranges near 800 meters, try using self destruct
mechanism. Another tactic used against aircraft include, mining possible
landing zones. Shadows cased by low fling a/c can be more visible then a/c.
Do not look
up when aircraft fly overhead. (One of the most obvious features on aerial
photographs is the upturned faces of soldiers.)
Helo tactics
Try and overrun a LZ before the air assault forces had an opportunity to
get organized and oriented. They also learned to “hug” soviet forces so that
helicopter gunships could not fire at them.
Vary the take-off and landing directions from the helipads.
Sometimes fly in threes.
700-800 meters away and then fire, trying to catch the helicopter with
the explosion of the round's self-destruction at 920 meters distance.
Soviet helo pilots took to flying NOE do to fact FIM -92 could not track
targets below i.e. looking down. FIM -92 speed Mach two. Range 6 km. i.e. five
miles.
Soviet fixed wing pilots not only gaining altitude quickly after takeoff
but make very steep banking turns.
MOVING TARGETS
Certain situations, such as multiple targets at varying ranges and
rapidly changing winds, do not allow for proper elevation and windage
adjustments.
Leading; is establishing an aiming point ahead of the target's
movement and maintaining it as the weapon is fired. With a scope it is the
distance the cross hairs are placed in front of the target's movement. AKA Hold off, shifting the point of
aim to achieve a desired point of impact. This requires the weapon and body
position to be moved while following the target. A common error of the sniper
is a tendency to watch his target instead of his aiming point. He must force
himself to watch his lead point or chosen point on the mil scale, it becomes
the sniper's point of concentration just as the cross hairs are for stationary
targets. There are four factors in determining leads: Speed, as a target moves faster,
it will move a greater distance during the bullet's flight. Therefore, lead
increases as speed increases. Angle
of movement, a target moving perpendicular to the bullet's flight path moves
a greater lateral distance than a target moving at an angle away from or toward
the bullet's path. Therefore, a target moving at a 45-degree angle covers ½ the
distance as a target moving at a 90-degree angle. Range to the target, the farther away a target is, the longer it
takes for the bullet to reach it. Therefore, lead must be increased as range
increases. Wind effects, when using
lead, the sniper aims into the wind. If the wind is moving from the right to
left, his point of aim is to the right. A wind blowing opposite the target's
direction of movement requires more lead on target, than a wind blowing in the
same direction as the target's movement. Also with wind blowing in same
direction, if it has a much greater speed than target, lead would have to be
reduced accordingly. Note; I do not have
the math skills to confirm the fallowing examples, or formulas. The
following formulas are used to determine moving target leads: TIME OF FLIGHT x
TARGET SPEED = LEAD. Time of flight in seconds. Target speed in fps. Lead =
distance in feet. Average speed of a man crawling 1 fps/0.8 mph, walking = 2
fps/1.3 mph, double time = 4 fps/2.5 mph, jogging = 6 fps/3.7 mph. To convert
leads in feet to meters: LEAD IN FEET x 0.3048 = METERS. To convert leads in
meters to mils: Lead in meters x 1,000 over range to target equals mil lead.
THREE METHODS OF LEAD;
Exact Rendezvous; Preferred method of engaging moving targets. The
sniper must establish an aiming point i.e. stationary point, ahead of the
target and pull the trigger when the target reaches it. This method works best
on targets with less lateral movement i.e. less movement from left to right. It
allows the sniper's weapon and body position to remain motionless.
Determining/holding exact (sight picture) using the horizontal stadia lines in
the mil dots in the M3A.
Estimate Rendezvous; Used to engage an erratically moving target
(fleeting) i.e. one that only presents itself briefly and then resumes cover.
As the target moves, cross hairs are centered as much as possible with the
target. This involves establishing and maintaining an aiming point in
relationship to the target and maintaining that sight picture (moving with the
target), while squeezing the trigger. When the target stops, reappears or
inters the sights the sniper fires. This technique puts the firer in position
for a second shot if the first one misses.
M3A scope, when using the scope, the sniper uses the horizontal
mil dots. The mil scale can be mentally sectioned into 1/4-mil increments for
leads. For example, a target at 500 meters that requires a 10-inch lead, he
would place the target's center mass halfway between the cross hairs and the
first mil dot (1/2 mil).
Tracking method with single
lead?
Note; I do not have the math skills to confirm the fallowing examples, or
formulas.
On the method, the trailing
edge of the front sight post is centered on target mass. Note see figure 7-29. This causes lead to automatically increase as
range increases.
Image edited
The rule provides for many
speed-angle combinations that places the bullet within 2 inches of target
center at 100 meters, the rule begins to break down for targets moving at
slight and large angles. If applied on targets moving at a slight angle-for
example, 5 degrees at 100 meters-the bullet strikes forward of target center,
about 4 inches with standard sights and about 7 inches with LLLSS sights. In
fact with targets moving at an angle less than 30 degrees, the bullet strikes
somewhat in front of target center. With targets moving at an angle of more
than 30 degrees, the bullet strikes somewhat behind target center. In the worst
case (i.e. 90-degrees, moving 8 mph IMO we are assuming 100 m range) the
shot-group center is located 9.8 inches behind target center. If bullets were
evenly distributed in a 12-inch group (recall 5.56mm equipped with bipod is
capable of at least 6 inch group at 100m range) this (12 inch group) would
result in hitting the target 40 % of the time.
The angle of target movement
is the angle between the LOS and the target's direction of movement. Figure
7-31 reflects the differences in lateral speed for various angles of movement
for a target traveling at 8 mph at a distance of 150 meters. At 90 degrees an
8-mph target moves 24 inches during the bullet's time of flight. If it is
moving on a 15-degree angle, it moves 6 inches (the equivalent of 2 miles per
hour). Note list figures in figure 7-31.
Image edited
More Example information; 8 miles per hour at a 90-degree angle and range of
300 meters, target covers 4 1/2 feet during time of fight. 10 mph is 14.6
feet per second. Common muzzle velocities 2640-3k plus fps. The front sight
post covers about 1.6 or 1.5 inches at 15 meters and about 16/15
inches at 150 meters. Since the center of the front sight post is the actual
aiming point, placing the trailing edge of the front sight post at target
center provides a .8 or ¾ inch lead on a 15-meter target and an 8 or 7 ½ inch
lead on a target at 150 meters. This rule provides a dead-center hit at
15-meters with target moving 7 mph at a 25-degree angle because the target
travels .8 inches during time of fight. At 150-meters with target moving 7
miles per hour at a 25-degree angle moves 8 inches during time of fight.
A walking target at 250
meters is hit dead center when moving at 45 degrees. Hits can be obtained if
target is moving on any angle between 15 and 75 degrees. When target is
running, a center hit is obtained when the target is on an angle of 15 degrees;
misses occur when target exceeds an angle of 30 degrees.
Note so after all that, IMO i.e. SWAG, rule of thumb, I
say a 45 degree angle reduces lateral movement by one ½ to 1/3 and 60 or 75
degrees about 25% either which away, 15 or 30 degrees 75% either which away.
Then there is this; Marines must be taught to fire at targets as though they
are stationary until lateral movement exceeds (15 degrees). Marines
should be taught to increase their lead if they miss, which increases their
probability of hitting all targets. Furthermore, impact points and aiming
points generally coincide at 100 yards or less, weather target stationary,
walking or running. So IMO rough estimates are as fallows, at 300 yards range,
aiming point is the leading edge for walker, one body width for runner. At 400
yards range, one body width for walker two or three for runner. With vehicles
start at leading edge of body, add one body width for every 10 mph. Remember to
consider angle of vehicles movement. Adjust lead as you would for wind values.
90 degree angle equals max speed and there for max lead, less than 45 degrees
reduces both etc. This emphasizes the need for knowing bullet/muzzle velocities
i.e. time of flight and how it relates to the range, angle, and speed of the
target.
This concludes this
post on Conduct of Engagements, Basic rule # 13
“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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