The invention relates to a process to control the initiation of an attack module, such as a projectile or sub-projectile, such attack module having at least one pre-determined direction of action. Before firing or on trajectory, the coordinates of at least one target are programmed into a fixed terrestrial reference, the orientation of the direction(s) of action in the fixed terrestrial reference is determined at least once on trajectory, and the initiation of the attack module is only authorized if the direction of action is oriented in the direction of the target. The invention also relates to the device implementing such a process.