375 Views

Download Presentation
## SDZ Construction: Hand Grenades

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -

**SDZ Construction: Hand Grenades**Inter-service Resident Range Safety Course (Intermediate)**Constructing an SDZ for Hand Grenades (Single Bay)**• Construct the SDZ for the M67 Fragmentation Grenade. • Map Scale: 1:2500 • Requirements for SDZs for this weapon system are discussed in DA-PAM 385-63, Chapter 7, Figure 7-1. • The following information is provided: • Throwing distance (Distance X): 40m • Fragmentation distance: 150m • Combined Distance X and fragmentation hazard radius: 190m August 2003**Scale Conversion**• Some surface danger zones will not be drawn to 1:25,000 or 1:50,000 scale. Here is how to convert to the necessary scale: • Determine what scale you are going to use (e.g., 1:2500) • Select the scale of the measuring device you will use. • Use the following formula: X = (a x 1,000) ÷ b a = scale to be used b = scale of measuring device August 2003**Scale Conversion**Formula: X = (a x 1,000) ÷ b a = scale to be used b = scale of measuring device Here is an example: Using a 1:25,000 measuring device, convert to 1:2,500 scale. X = (a x 1,000) ÷ b X = (2500 x 1000) ÷ 25,000 X = 2,500,000 ÷ 25,000 X = 100m 1,000 meters on the 1:25,000 scale, represents 100 meters on a scale of 1:2,500 August 2003**Legend for Hand Grenades**August 2003**Plot the throwing position.**• Plot the target. • Plot the grenade target line. August 2003**45°**45° • From the throwing position, measure 45° right and left of the Grenade Throwing Line. • Draw tic marks. August 2003**From the throwing position, draw straight lines through tic**marks. These are the Dispersion Lines. • On the Grenade Throwing Line, draw a tic mark at the measurement for Distance X (190m). August 2003**Place the needle of the compass at the throwing position and**scribe an arc between the Dispersion Lines at 190m mark. This is the frag distance from the throwing point. August 2003**Measure 40m up each Dispersion Line. Draw a tic mark at the**40m measurements. August 2003**Place the needle of the compass in each tic mark and the**pencil at the point where the previously drawn arc intersects with the Dispersion Line. Scribe an arc on each side about 3/4 of the way back toward the throwing position. August 2003**Using the grenade target line as a reference, lightly draw a**line behind the throwing position. • Draw a tic mark at 150m. August 2003**Place the needle of the compass at the throwing position and**scribe an arc through the tic mark. • Erase any unnecessary lines. August 2003**Place the needle of the compass at the throwing position and**scribe an arc through the tic mark. • Erase any unnecessary lines. August 2003**Legend for Hand Grenades**August 2003