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

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

Mils Scale Degrees Scale Index August 2003

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

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

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. August 2003

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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