sdz construction: anti-tank rockets (at-4) inter-service resident range safety course (intermediate)
TRANSCRIPT
SDZ Construction:Anti-Tank Rockets (AT-4)Inter-service Resident Range Safety Course (Intermediate)
August 2003
The AT-4
The AT-4 is a lightweight anti-tank weapon used primarily by infantry forces for engagement and defeat of light armor.
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84mm HEAT cartridge
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Weapon:
Ammo Type:
Distance X:
Area A:
Area B:
Map Scale:
Map Sheet:
Map Series:
Map Edition:
Date:
Name:
Legend for the AT-4
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Constructing an SDZ for the AT-4Construct 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.
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Plot the firing point.
Plot the target.
Draw the Rocket Target Line.
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2100m
From Table 8-4, find the measurement for Distance X.
Distance X =
Annotate Distance X on the legend.
Dis
tan
ce
X
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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°Draw tic marks as shown.
Dis
tan
ce
X
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This completes the Dispersion Area.
From the firing point, draw a line through the tic marks out through Distance X.
DispersionArea
5°5°D
ista
nc
e X
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DispersionArea
At the firing point, measure 13° with a protractor from the left and right limits of the Dispersion Area to establish the Ricochet Area.
Draw tic marks.13°13°
Dis
tan
ce
X
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DispersionArea
Draw a straight line from the firing point through each tic mark out through Distance X.
13°13°D
ista
nc
e X
From the firing point, scribe an arc between the left and right limits of the Ricochet Area. Use Distance X as the radius.
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DispersionArea
Erase any unnecessary lines.
RicochetArea
Dis
tan
ce
X
This completes the Ricochet Area.
13°13°
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DispersionArea
Erase any unnecessary lines.
RicochetArea
Dis
tan
ce
X
This completes the Ricochet Area.
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From Table 8-4, find the measurement for Area A.
227m (ˆ240m)Area A =
Lightly draw lines perpendicular to the limits of the Ricochet Area.
At the measurement for Area A, place tic marks on the lines just drawn.
DispersionArea
RicochetArea
Dis
tan
ce
X
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At the firing point, measure with a protractor 25° for Area A.
Draw straight lines through the tic marks just drawn.
Draw tic marks as shown.
DispersionArea
RicochetArea
25°25°
Dis
tan
ce
X
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Draw straight lines through the tic marks just drawn.
488m (ˆ500m)Area B =
From Table 8-4, find the measure-ment for Area B.
DispersionArea
RicochetArea
25°25°
Dis
tan
ce
X
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Verify that Distance X is correct and then place a tic mark at the measurement for Area B.
Lightly draw a line that extends the rocket target line from Distance X.
DispersionArea
RicochetArea
DispersionArea
RicochetArea
25°25°
Dis
tan
ce
X
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DispersionArea
RicochetArea
DispersionArea
RicochetArea
This completes Areas A and B.
From the firing point, scribe an arc using the measurement for Area B as the radius.
25°25°
Dis
tan
ce
X
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DispersionArea
RicochetArea
DispersionArea
RicochetArea
To complete this part of the SDZ, erase all unnecessary lines.
Annotate Areas A and B on the legend.
Area A
Area B
Dis
tan
ce
X
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DispersionArea
RicochetArea
DispersionArea
RicochetArea
To complete this part of the SDZ, erase all unnecessary lines.
Annotate Areas A and B on the legend.
Area A
Area B
Dis
tan
ce
X
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Area FArea 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.
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Area FThere are two zones associated with Area F:
The Danger Zone
The Caution Zone
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Danger ZoneThe 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.
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Caution ZoneThe 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.
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Locate Area F
Draw the components of Area F in detail.
Area F(not to scale)
DispersionArea
RicochetArea
DispersionArea
RicochetArea
Dis
tan
ce
X
Area A
Area B
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In Table 8-4, find the Area F depth measurement.Danger Zone depth = 5 meters
Firing Line
Caution Zone depth = 95 metersArea F depth = 100 metersScale conversion: [x = (a x 1000 ÷ b)]
Note: Scale for Area F is 1:625
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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.
Draw a line the length of the Area F depth rearward from the firing point along the same line as the rocket target line.
Firing Line
45°45°
95m
5m
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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.
Firing Line
45°45°
95m
5m
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Firing Line
45°45°
This completes the Danger Zone.
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.
95m
5m
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The Area below the Danger Zone is the Caution Zone.
Caution Zone
This completes Area F.
Firing Line
45°45°
95m
5m
Danger Zone
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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:
Legend for the AT-4