Training device for simulating an unexploded submunition

An acoustic training device for simulating the effects of a submunition in a tactical engagement simulation system employing acoustic receivers, said training device comprising a housing which resembles a submunition, means for generating an audible signal of a particular frequency and duration, motion sensing means, means responsive to said motion sensing means for activating said signal generating means, a manually operated switch for arming said device, and timing means to delay activation of said motion sensing means once armed so that said device may be deployed without activating said signal generating means, wherein said timing means comprises an R-C circuit and comparator, said R-C circuit comprising a power source, a first resistor and a capacitor in series, said resistor and capacitor being in parallel with said power source and with a second and third resistor which form a voltage divider, a first voltage between said first resistor and capacitor and a second voltage between said second and third resistors being the inputs to said comparator which outputs a signal voltage when said capacitor charges to a predetermined voltage.