PURPOSE:To permit the correct reading of the deviation of impact point by a method wherein the title device is provided with a detector, detecting a flame generated upon the impact of a projectile and outputting a stop pulse signal, and a delay memory, receiving the stop pulse signal and outputting a picture signal before a given period of time as a freeze picture. CONSTITUTION:The luminance of a flame generated upon bursting of a projectile 17 is high and, therefore, the flame is detected by a detector 13 and a stop pulse signal 32 is outputted from the detector 13 while the stop pulse signal 32 is inputted into a delay memory 36. The delay memory 36 stores a plurality of pictures and outputs a picture before a given period of time from the inputting time point of the stop pulse signal 32 as a freeze picture 4. The detector 13 is operated by a flash 22 generated upon firing the projectile 17 and outputs the stop pulse signal 32, however, the freeze picture 4, indicated finally in a monitor television 5 is a picture taken by the detection of the flame of the projectile 17, which is generated after the flash 22, and, therefore, the operation of the point of impact confirmation device will never be troubled by the flash 22. According to this method, an aiming point is corrected by the correcting amount of aiming, which is obtained from the detected impact point, whereby, the probability of hitting of next projectile may be improved.
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