Abstract: A method and apparatus for simulating a missile. A simulation program for a weapon using a processor unit is executed in a simulation unit. A number of input signals is received from a control station in a vehicle through an interface system connected to a weapons interface on the vehicle. The interface system is in communications with the processor unit. The control station is capable of operating the weapon connected to the weapons interface. A number of output signals is generated using a simulation of the weapon. The number of output signals is sent through the weapons interface to the control station.