compressed gas such as gas cartridge 26 and an electro mechanical firing mechanism 30 cartridge 26 is securely held in place by a molded hollow indentation 29 in the wall of package 24 and a plastic receptacle 32 a thin metal hermetic seal 33 is placed over cartridge 26 to retain the charged gas therein as is known in the art mechanism 30 comprises a pivoting striker 35 rotatable on a predetermined pivot point 37 that has at one end a sharp spike 39 and at the other end a biasing means such as helical tension spring 42 of predetermined strength striker 35 is restrained initially to the open position shown in full by a burn resistor 44 connecting ends of conducting wire 46 wire 46 is connected into the firing circuitry such that on one end a spring mounted plunger 48 which is electrically connected by compression spring 51 to wire lead 53 maintains contact with a positive lead 55 and on the other end terminal 57 is connected via wire lead 59 to ground 19 by rivet 22 fig4 shows schematically the circuit used to sequentially fire a store or buoy 15 control module 40 contains pulse limiting circuitry as is known in the art that precludes multiple launches where the signal exceeds the predetermined time necessary to burn out the burn out resistor 44 on the outwardmost store as the signal is sent.