Mapping by tachometry or total station.

That year, it acquired from the Matra's subsidiary Interlec its tachometry activities.

A weakness of systems that rely on wheel rotation for tachometry and odometry is that the train wheels and the rails are very smooth and the friction between them is low, leading to high error rates if the wheels slip or slide.

In addition, it provides checks and security products, including couplers, odometry/tachometry systems and event recorders, brake control units, oil-free air generator BURAN, sanding nowe, axle mounted disc, magnetictrack brake, disc brakes controllers, air generation and air treatment, and pantograph compressor.