1. SDZ Construction: 120mm Tank Cannon Inter-service Resident Range Safety Course (Intermediate)

2. August 2003 120mm Ammunition

3. August 2003 Weapon: Ammo Type: Distance X: Angle P: Distance W: Area A: Area B: Map Scale: Map Sheet: Map Series: Map Edition: Date: Name: Legend for 120mm Tank Cannon

4. August 2003 Constructing 120mm Tank Cannon SDZ Construct a 120mm tank cannon SDZ for that weapon firing the M830 HEAT- MP-T cartridge into steel. Dimensions of the SDZ for this weapon system are given in DA-PAM 385-63, Chapter 12, Table 12-2. First, plot the firing point, target, and then establish the gun target line.

5. August 2003 Plot the firing point. Establish the gun target line. Plot the target.

6. August 2003 From Table 12-2, find Distance X (steel). Distance X = 6589m (ˆ6600m) Annotate Distance X on the legend. Distance X

7. August 2003 At the firing point, measure 5° from the left and right of the gun target line. 5° Draw tic marks as shown. Distance X

8. August 2003 To establish the lateral limits of the Dispersion Area, draw a straight line from the firing position through each tic mark out to Distance X. This completes the Dispersion Area. 5° Distance X Dispersion Area

9. August 2003 For the Ricochet Area, on Table 12-5, find the measurement for Distance W (steel). Distance W = 600m Distance X Lightly draw lines perpendicular to the limits of the Dispersion Area. Dispersion Area

10. August 2003 Draw tic marks at the measurement for Distance W on the lines just drawn. Draw straight lines through the tic marks. Distance X Dispersion Area

11. August 2003 On Table 12-2, find the Angle P. Angle P = 12° Draw tic marks. At the firing point, measure 12° from the left and right limits of the Dispersion Area. Distance X 12° PP Dispersion Area

12. August 2003 This completes the Ricochet Area. Draw a straight line from the firing point through each tic mark just drawn. 12° PP Distance X Annotate the Ricochet Area on the legend. Ricochet Area Dispersion Area

13. August 2003 Distance X Erase any unnecessary lines. From the firing point, scribe an arc between the left and right limits of the Ricochet Area. Use Distance X as the radius. Ricochet Area Dispersion Area

14. August 2003 Erase any unnecessary lines. 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 Ricochet Area Dispersion Area

15. August 2003 Lightly draw lines perpendicular to the limits of the Ricochet Area. Draw tic marks at the measurement for Area A. On Table 12-2, find the measurement for Area A. Area A = 1,125m (ˆ1,150m) Distance X Ricochet Area Dispersion Area

16. August 2003 Draw straight lines through the tic marks. Lightly draw a line extending the gun target line the measurement of Area B. On Table 12-2, find the measurement for Area B. Area B = 1,125m (ˆ1,150m) Distance X Ricochet Area Dispersion Area

17. August 2003 Draw a tic mark at the measurement for Area B. Place the needle of the compass at the firing point and scribe an arc through the tic mark between the limits of Area A. 25° From the firing point, measure 25° to the right and left of the limits of the Ricochet Area. Ricochet Area Dispersion Area

18. August 2003 Distance X 25° Area B Area A Draw tic marks. From the firing point, draw straight lines out through the tic marks as shown. This completes Areas A and B. Erase any unnecessary lines. Ricochet Area Dispersion Area

19. August 2003 Distance X Area B Area A Draw tic marks. From the firing point, draw straight lines out through the tic marks as shown. This completes Areas A and B. Erase any unnecessary lines. Ricochet Area Dispersion Area

20. August 2003 Weapon: 120mm Tank Ammo Type: M830 HEAT-MP-T Distance X: 6589m (ˆ6600m) Angle P: 12° Distance W: 600m Area A: 1125m (ˆ1,150m) Area B: 1125m (ˆ1,150m) Map Scale: 1:50,000 Map Sheet: Map Series: Map Edition: Date: Name: Legend for 120mm Tank Cannon