1. SDZ Construction: Single Firing Point, Single Target
Inter-service Resident Range Safety Course (Intermediate)
Version: August 2003
SDZ Construction: Single Firing Point, Single Target
Inter-service Resident Range Safety Course (Intermediate)
SDZ Construction: Single Firing Point, Single Target

2. SDZ Construction Fundamentals
Inter-service Resident Range Safety Course (Intermediate)
Version: August 2003
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
August 2003
SDZ Construction: Single Firing Point, Single Target

3. Mils Scale
Degrees Scale
Index
August 2003

4. The M2 may be mounted on ground mounts and most vehicles as an anti-personnel and anti-aircraft weapon.
August 2003

5. Small Arms Legend (Cone)
Weapon:
Ammo:
Distance X:
Area A:
Map Scale:
Map Sheet:
Map Series:
Map Edition:
Date:
Name:
August 2003

6. 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 , Appendix B, Table B-1.
Cone-shaped SDZ dimensions are shown in DA-PAM , Figure 6-1.
August 2003

7. 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.
August 2003

8. Establish the gun target line.
Plot the target.
Establish the gun target line.
Gun Target
Line
Plot the firing point.
Firing Point
August 2003

9. 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.
August 2003

10. From Table B-1, find Distance X M2 ball.
Annotate Distance X on the legend.
Distance X
August 2003

11. 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.
August 2003

12. Inter-service Resident Range Safety Course (Intermediate)
Version: August 2003
At the firing point, measure 5° with a protractor from the left and right of the gun target line.
Draw tic marks.
Distance X
Explain “Zero line” method of using protractor. 5° 5°
August 2003
SDZ Construction: Single Firing Point, Single Target

13. This completes the Dispersion Area.
Inter-service Resident Range Safety Course (Intermediate)
Version: August 2003
To establish the limits of the Dispersion Area, draw a straight line from the firing position through each tic mark out to Distance X.
Distance X
Dispersion
Area
This completes the Dispersion Area.
Gun Target
Line
Remind students that all lines must begin at the same point. 5° 5°
August 2003
SDZ Construction: Single Firing Point, Single Target

14. 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.
August 2003

15. At the firing point, measure 5° with a protractor from the left and right limits of the Dispersion Area.
Draw tic marks.
Distance X
Dispersion
Area 5° 5°
August 2003

16. This completes the Ricochet Area.
Inter-service Resident Range Safety Course (Intermediate)
Version: August 2003
To establish the lateral limits of Ricochet Area, draw a straight line from the firing position through each tic mark out through Distance X.
Ricochet
Area
Distance X
Dispersion
Area
This completes the Ricochet Area.
Tell students to draw Dispersion and Ricochet lines THROUGH Distance X. 5° 5°
August 2003
SDZ Construction: Single Firing Point, Single Target

17. 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.
August 2003

18. Draw tic marks at 100 meters.
To establish Area A, lightly draw lines perpendicular to the right and left limits of the Ricochet Area.
Ricochet
Area
Draw tic marks at 100 meters.
Distance X
Dispersion
Area
Draw lines parallel to the limits of the Ricochet Area through the tic marks.
August 2003

19. Draw a straight line from the firing point through each tic mark.
At the firing point, measure 30° with a protractor from the left and right limits of the Ricochet Area.
Ricochet
Area
Draw tic marks.
Distance X
Dispersion
Area
Draw a straight line from the firing point through each tic mark.
30°
30°
August 2003

20. Annotate Area A on the legend.
From the firing point, scribe an arc between the left and right limits of Area A. Use Distance X as the radius.
30°
Area A
Ricochet
Area
This completes Area A.
Distance X
Dispersion
Area
Annotate Area A on the legend.
To complete the SDZ, erase all unnecessary lines.
30°
August 2003

21. Annotate Area A on the legend.
From the firing point, scribe an arc between the left and right limits of Area A. Use Distance X as the radius.
Area A
Ricochet
Area
This completes Area A.
Distance X
Dispersion
Area
Annotate Area A on the legend.
To complete the SDZ, erase all unnecessary lines.
August 2003

22. Small Arms Legend (Cone)
Weapon:
M2 .50 Machine Gun
Ammo:
M2 Ball
Distance X:
6500m
Area A:
100m
Map Scale:
1:50,000
Map Sheet:
Map Series:
Map Edition:
Date:
Name:
August 2003