may be utilized to control both the velocity and range of projectile 10 or cause it to fall out of flight at a predetermined distance from its launch point an alternative strategy is to incorporate speed control into a supersonic projectile so that the velocity can be reduced rapidly either at impact or when the projectile is close to the target on board speed control allows an operator to communicate the distance from the target to the bullet so that the velocity reduction mechanism is activated at the proper moment for a u201c soft u201d impact referring also to fig4 communication apparatus 14 includes a power supply 50 for providing power to communication apparatus 14 an example of power supply 50 is a model 4019 100 lithium battery manufactured by electrochem power solutions incorporated of canton massachusetts depending on the type of communication to be performed by communication apparatus 14 one or more types of transmission or reception devices may be employed for example if communication apparatus 14 is to perform light based communication one or more light sources 52 59 may be employed a typically example of light sources 52 59 is a model smc 630 light emitting diode manufactured by epitex incorporated of kyoto japan however other forms of light sources such as.