Transcript SDZ Construction: Single Firing Point, Single Target

SDZ Construction:
Single Firing Point, Single Target
Inter-service Resident Range Safety Course
(Intermediate)
SDZ Construction Fundamentals
All SDZs, regardless of complexity, are
drawn from a point or points of
reference.
To construct an accurate and precise
SDZ, you will need the following:
Compass for drawing circles and arcs
Protractor for measuring angles
Plotting scale for measuring distances
Fine-point pencil for drawing accuracy
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Mils Scale
Degrees
Scale
Index
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The M2 may be mounted on ground mounts
and most vehicles as an anti-personnel and
anti-aircraft weapon.
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Small Arms Legend (Cone)
Weapon:
Ammo:
Distance X:
Area A:
Map Scale:
Map Sheet:
Map Series:
Map Edition:
Date:
Name:
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Constructing a Cone-Shaped SDZ
Construct a cone-shaped SDZ for the M2
.50 MG using M2 ball ammo.
Map scale: 1:50,000.
Distance X for this weapon/ammo is given
in DA-PAM 385-63, Appendix B, Table
B-1.
Cone-shaped SDZ dimensions are shown
in DA-PAM 385-63, Figure 6-1.
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What’s the Gun Target Line?
The Gun Target Line, or GTL, is a line
drawn between the firing point and the
target. It is also referred to as the line of
fire.
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Plot the target.
Establish the gun target line.
Gun Target
Line
Plot the firing point.
Firing Point
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What is Distance X?
Distance X is the maximum distance a
projectile, to include guided missiles
and rockets, will travel when fired or
launched at a given quadrant elevation
with a given charge or propulsion
system.
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From Table B-1,
find Distance X M2
ball.
Annotate Distance
X on the legend.
Distance X
Distance X = 6500m
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Determine the Dispersion Area
The Dispersion Area is the area within
the Surface Danger Zone located
between the gun target line and the
Ricochet Area.
This area accounts for human error, gun
or cannon tube wear, propellant
temperature, etc.
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Draw tic marks.
Distance X
At the firing point,
measure 5° with a
protractor from the
left and right of the
gun target line.
5°
5°
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Distance X
To establish the
limits of the
Dispersion Area,
draw a straight
line from the firing
position through
each tic mark out
to Distance X.
Dispersion
Area
This completes the
Dispersion Area.
Gun Target
Line
5°
5°
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Ricochet Area
The Ricochet Area is located to the left
and right of the Dispersion Area and
contains projectiles after they make
contact with the target medium.
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Draw tic marks.
Distance X
At the firing point,
measure 5° with a
protractor from the
left and right limits
of the Dispersion
Area.
Dispersion
Area
5°
5°
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Ricochet
Area
Distance X
To establish the
lateral limits of
Ricochet Area, draw
a straight line from
the firing position
through each tic
mark out through
Distance X.
Dispersion
Area
This completes the
Ricochet Area.
5°
5°
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Area A
Area A is the secondary danger area, or
buffer zone, that laterally parallels the
Ricochet Area and contains fragments,
debris, and components from frangible
or explosive projectiles and warheads
functioning on the right or left edge of
the Ricochet Area.
Area A measurement for direct-fire small
arms without explosive projectiles is 100
meters.
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Draw tic marks at
100 meters.
Distance X
To establish Area
A, lightly draw lines
perpendicular to
the right and left
limits of the
Ricochet Area.
Ricochet
Area
Dispersion
Area
Draw lines parallel
to the limits of the
Ricochet Area
through the tic
marks.
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Draw tic marks.
Draw a straight
line from the firing
point through
each tic mark.
Ricochet
Area
Distance X
At the firing point,
measure 30° with
a protractor from
the left and right
limits of the
Ricochet Area.
Dispersion
Area
30°
30°
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This completes
Area A.
Area A
Ricochet
Area
Distance X
From the firing
point, scribe an
arc between the
left and right limits
of Area A. Use
Distance X as the
radius.
Dispersion
Area
Annotate Area A on
the legend.
To complete the
SDZ, erase all
unnecessary lines.
30°
30°
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This completes
Area A.
Area A
Distance X
From the firing
point, scribe an
arc between the
left and right limits
of Area A. Use
Distance X as the
radius.
Ricochet
Area
Dispersion
Area
Annotate Area A on
the legend.
To complete the
SDZ, erase all
unnecessary lines.
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Small Arms Legend (Cone)
Weapon:
Ammo:
Distance X:
Area A:
Map Scale:
Map Sheet:
Map Series:
Map Edition:
Date:
Name:
M2 .50 Machine Gun
M2 Ball
6500m
100m
1:50,000
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