Essentially, this is a computer controlled aiming sight with range finder. Distance was measured using either a chain or more recently a transit or range finder. Extended precision comes from the wider effective measurement base of the "range finder". The FCS is equipped with laser range finder and thermal imaging sensor. It is equipped with a computer-controlled targeting system with laser range finder and thermal-tracking sight. The commander was also given an optical full-field coincidence range finder. It also uses the laser range finder for detecting obstacles and avoiding them. Sensors include a 5-megapixel camera, a tilting laser range finder, and an inertial measurement unit. Additionally, a laser range finder and a thermal imager are provided for the gunner. A built-in range finder measures the distance to the nearest pair of eyeballs. At the heart of this type of scanner is a time-of-flight laser range finder. The Vihor/M95 tank received new laser range finder, LIRD-4B - a laser irradiation warning system. An M12 full field optical range finder was used, the same as the M47. E.g. the range finder of the AMX 50 was also used by the AMX 30.