Terminal Learning Objective Action: Introduction to Modernized Demolition Initiators

HISTORY Developed in the late 40s Used in Civilian Market Introduced to the Army in 1996 Supplements and Partially Replaces the M6, M7 and Detonating Cord.

CONSIDERATIONS MDI DOES NOT CHANGE CHARGE EMPLACEMENT OR SETUP MDI IS STRICTLY AN IGNITION SYSTEM CHANGE.

CAPABILITIES Standard military demolition missions Deepwater up to 30 meters Quarrying(with special application). Instant or delay initiation Eliminates accidental initiation from static, transmitters, or electrical discharge Hybrid (two types of firing systems) MDI Stand Alone MDI/Det Cord, Det Cord/MDI

COMPONENTS M12/M13-Cap M15-Cap M11-Cap M14 Time Fuse M81-FI M9 Holder

M9 HOLDER USES: PACKAGING: Secure a blasting cap (small flap end) Secure shock tubes to the blasting cap (larger flap) Can secure up to five shock tubes for initiation PACKAGING: 50 Ea Per box 10 boxes per crate Crate Total- 500

M9 HOLDER SECURING SHOCK TUBE 1-2 Shock Tubes Looped under holder Tied in a knot

M9 ISSUES Secures only high strength caps (M11 & M14) NOT REUSBLE Unit must request enough to support all training and live fire missions

M11 BLASTING CAP A branch line to a primary charge To ignite shock tube or detonating cord “High Strength Cap”

M11 DESCRIPTION 2 FLAGS J HOOK CONNECTOR Used to secure det cord 1 YELLOW (two meters from cap) 1 RED (one meter from cap) J HOOK CONNECTOR Used to secure det cord PACKAGING Individual coil—30ft. long 6 coils per fiber board box 10 boxes per crate Crate Total= 60 coils

M11 ISSUES Do Not Secure Det Cord and Shock Tube in the Same Holder Do Not Hold Shock Tube When Firing Use J- Hook to Secure to Det Cord Plug and Sealed End

Relay for the initiation pulse to another relay or high strength cap M12 TRANSMISSION LINE Relay for the initiation pulse to another relay or high strength cap Low Strength Cap Command Detonation “ Transmission Line Only”

M12 PACKAGING 500 FT. per spool 2 Ea spools per foil bag 4 bags per crate Crate total- 8 spools/ 4000 Ft.

Relay for the initiation pulse to another relay or high strength cap M13 TRANSMISSION LINE Relay for the initiation pulse to another relay or high strength cap Low Strength Cap Command Detonation “ Transmission Line Only”

M13 PACKAGING 1000 Ft spool 1 spool per foil bag 4 bags per crate Crate Total= 4 spools/ 4000 Ft

M14 TIME DELAY “High Strength Cap” 5 minute delay Length may be adjusted Detonates Explosives, Det Cord or Shock Tube

M14 PACKAGING Approx. 7 ½ ft. long 6 coils per fiber board box 10 boxes per crate Crate Total= 60 Coils

M15 CAP, DELAY “ Currently a specialized use item only”

M15 USES Provide a Delay in the System for Staged Demolitions Is usually used for Quarrying Operations

M15 PACKAGING 70 Ft Individual Coils 6 Coils Per Fiber Board Box 10 Boxes Per Crate Crate Total- 60 Coils/ 4200 Ft

M81 IGNITER To Ignite Time Blasting Fuse (M14) Ignite Shock Tube M81 has a stronger cap than M60, heavier case, and 2 plugs

M81 PACKAGING 5 Per Fiber Board box 60 Boxes Per Crate Crate Total - 300 Igniters

SPLICING MATERIAL PACKING: USES: 5 Ea Per Plastic Bag 1 Bag Per Spool of M12 or M13 USES: To repair a Damaged Section of Shock Tube To increase standoff

Enabling Learning Objective 1 ACTION: PRIME EXPLOSIVES USING MODERNIZED DEMOLITION INITIATORS (MDI) 051-193-1103* CONDITIONS: You are given quarter-pound blocks of TNT, a priming adapter, string, a sandbag, M2 crimpers, and a section of Mll branch line. Some iterations should be performed in MOPP 4. STANDARDS: You will prime the TNT with MDI-with and without the priming adapter so that the blasting cap remains in the cap well and is not damaged or handled in a way that could cause detonation of the explosive while priming. * Reference TC 5-150 Engineer Qualification Tables

Enabling Learning Objective 2 ACTION: CONSTRUCT A NONELECTRIC INITIATING ASSEMBLY WITH MODERNIZED DEMOLITION INITIATORS (MDI) 051-193-1055* CONDITIONS: You have been given detonating cord, an Mll branch line, an M12 transmission line, an M81 fuse igniter, an M14 time-delay fuse, an M9 holder, J-hooks, adhesive tape, a sandbag, and M2 crimpers. Some iterations should be performed in mission-oriented protective posture (MOPP) 4. STANDARDS: You will construct a nonelectric initiating assembly-using MDI correctly and in sequence. You will attach the assembly to a detonating-cord firing system so that, when initiated, it will detonate as if it were live. * Reference TC 5-150 Engineer Qualification Tables

Enabling Learning Objective 3 ACTION: CONSTRUCT A DUAL-FIRING SYSTEM WITH MODERNIZED DEMOLITION INITIATORS (MDI) 051-193-1202* CONDITIONS: You are given detonating cord, an Mll branch line, an M12 transmission line, an M14 time-delay fuse, priming adapters, M9 holders, M81 fuse igniters, quarter-pound blocks of TNT, M2 crimpers, a sandbag, and adhesive tape. Some iterations should be performed in MOPP 4. STANDARDS: You will dual prime each charge using a combination of both MDI and detonating cord. You will correctly tie the charges into a combination firing system (also consisting of MDI and detonating cord) so the charges will detonate. * Reference TC 5-150 Engineer Qualification Tables

SUMMARY MDI Components Constructing a Nonelectric Initiating Assembly Constructing a Dual-firing System Priming Explosives