Abstract: The invention is directed to a device utilizing electromagnetic energy, within or close to the visible frequency range, and components sensitive to such energy to determine, indicate and record, without use of photographic technique or TV video recording, the aim of an object relative to a defined point at a defined instant or variations in aim during a defined time interval.One characteristic feature of the device is that an available aiming aid, for instance a telescopic sight, is used to pick up energy radiated from the point towards which the object should be aimed.