An electronic apparatus couplable to a weapon, in particular to a grenade launcher, for determining, instant by instant, the Pitch, Roll and Heading angles of the weapon. These values will determine the instantaneous attitude of the weapon so as to employ such information in ballistic computing programs adapted to provide the operator shouldering the weapon indications in real time relating to the shooting attitude to be given to the weapon with the purpose of hitting a target.
This electronic system has the advantage of providing an accurate indication of the attitude of the weapon, as the error introduced by the gyroscopes in speed measuring is eliminated due to the compensation obtained through the acceleration components provided by the accelerometers.