Transcript SDZ Construction: Anti-Tank Rockets (AT-4)

SDZ Construction:
Anti-Tank Rockets (AT-4)
Inter-service Resident Range Safety Course
(Intermediate)
The AT-4
The AT-4 is a lightweight anti-tank weapon
used primarily by infantry forces for
engagement and defeat of light armor.
August 2003
84mm HEAT cartridge
August 2003
Legend for the AT-4
Weapon:
Ammo Type:
Distance X:
Area A:
Area B:
Map Scale:
Map Sheet:
Map Series:
Map Edition:
Date:
Name:
August 2003
Constructing an SDZ for the AT-4
Construct an SDZ for the AT-4 firing the
84mm HEAT M136 rocket.
Map Scale: 1:25,000.
Dimensions of the SDZ for this weapon
system are given in DA-PAM 385-63,
Chapter 8, Table 8-4 and Figures 8-4
and 8-5.
First, plot the firing point, target, and
rocket target line.
August 2003
Plot the target.
Draw the Rocket Target Line.
Plot the firing point.
August 2003
Distance X = 2100
m
Annotate Distance X
on the legend.
Distance X
From Table 8-4,
find the
measurement for
Distance X.
August 2003
Draw tic marks as
shown.
Distance X
For the Dispersion
Area, at the firing
point, measure with
a protractor 5°
angles on the right
and left of the
Rocket Target Line.
5°
5°
August 2003
This completes the
Dispersion Area.
Distance X
From the firing
point, draw a line
through the tic
marks out through
Distance X.
Dispersion
Area
5°
5°
August 2003
Draw tic marks.
Distance X
At the firing point,
measure 13° with a
protractor from the
left and right limits of
the Dispersion Area
to establish the
Ricochet Area.
Dispersion
Area
13°
13°
August 2003
From the firing point,
scribe an arc
between the left and
right limits of the
Ricochet Area. Use
Distance X as the
radius.
Distance X
Draw a straight line
from the firing point
through each tic
mark out through
Distance X.
Dispersion
Area
13°
13°
August 2003
Erase any
unnecessary lines.
Distance X
This completes the
Ricochet Area.
Dispersion
Area
Ricochet
Area
13°
13°
August 2003
Erase any
unnecessary lines.
Distance X
This completes the
Ricochet Area.
Dispersion
Area
Ricochet
Area
August 2003
Area A =
227m (ˆ240m)
Lightly draw lines
perpendicular to the
limits of the Ricochet
Area.
Distance X
From Table 8-4, find
the measurement for
Area A.
Dispersion
Area
Ricochet
Area
At the measurement
for Area A, place tic
marks on the lines
just drawn.
August 2003
At the firing point,
measure with a
protractor 25° for
Area A.
Distance X
Draw straight lines
through the tic marks
just drawn.
Dispersion
Area
Ricochet
Area
Draw tic marks as
shown.
25°
25°
August 2003
From Table 8-4,
find the measurement for Area B.
Area B = 488m (ˆ500m)
Distance X
Draw straight lines
through the tic marks
just drawn.
Dispersion
Area
Ricochet
Area
25°
25°
August 2003
Verify that
Distance X is
correct and then
place a tic mark at
the measurement
for Area B.
Distance X
Lightly draw a line
that extends the
rocket target line
from Distance X.
Dispersion
Area
Ricochet
Area
25°
25°
August 2003
This completes
Areas A and B.
Distance X
From the firing
point, scribe an arc
using the
measurement for
Area B as the
radius.
Dispersion
Area
Ricochet
Area
25°
25°
August 2003
Area B
Annotate Areas A and
B on the legend.
To complete this part
of the SDZ, erase all
unnecessary lines.
Distance X
Area A
Dispersion
Area
Ricochet
Area
August 2003
Area B
Annotate Areas A and
B on the legend.
To complete this part
of the SDZ, erase all
unnecessary lines.
Distance X
Area A
Dispersion
Area
Ricochet
Area
August 2003
Area F
Area F is the danger Area to the rear of
a weapon system where personnel are
endangered by back-blast debris,
overpressure, blast, and hazardous
impulse noise.
Area F is the 90° angle (45° left and
right) of the rearward extension of the
rocket target line.
August 2003
Area F
There are two zones associated with
Area F:
The Danger Zone
The Caution Zone
August 2003
Danger Zone
The Danger Zone is the immediate area
to the rear of the firing line.
Danger Zone occupation could result in
fatalities or serious casualties including
severe burns, eye damage, or
permanent hearing loss.
The hazards are base plate fragments,
debris, fireball, high noise levels, and
overpressure.
August 2003
Caution Zone
The Caution Zone is an extension of the
Primary Danger Zone.
Occupation of this zone could also
result in severe casualties due to back
blast, debris, high noise levels and
possible base plate fragments.
The Primary Danger and Caution Zones
may not be modified.
August 2003
Area B
Locate Area F
Area A
Distance X
Draw the
components of
Area F in detail.
Dispersion
Area
Ricochet
Area
Area F
(not to scale)
August 2003
Firing Line
Note: Scale for Area F is 1:625
In Table 8-4, find the Area F depth measurement.
Danger Zone depth = 5
meters
Caution Zone depth = 95
meters
Area F depth =
100
Scale conversion: [x =meters
(a x 1000 ÷ b)]
August 2003
Firing Line
5m
Draw a line the length of the Area F depth rearward from
the firing point along the same line as the rocket target line.
From the firing point, draw two additional lines of the same
length; one 45° to the left and one 45° to the right of the
line just drawn.
August 2003
Firing Line
5m
From the firing point, scribe an arc from the left to the right
limit of the Danger Zone. Use the 100 meter measurement
as the radius.
August 2003
Firing Line
5m
Danger Zone
From the firing point, scribe an arc from the left to the right
limit of the Danger Zone. Use the 5 meter measurement
as the radius.
This completes the Danger Zone.
August 2003
Firing Line
5m
Danger Zone
Caution Zone
The Area below the Danger Zone is the Caution Zone.
This completes Area F.
August 2003
Legend for the AT-4
Weapon:
AT-4
Ammo Type:
84mm HEAT M136 Rocket
Distance X:
2100m
Area A:
227m (ˆ240m)
Area B:
488m (ˆ500m)
Primary Danger Zone:
5m
Primary Caution Zone:
95m
Area F:
100m
Map Scale:
1:25,000
Map Sheet:
Map Series:
Map Edition:
Date:
Name:
August 2003