NETRA --- Network of Electrification Testing and Recording Apparatus is a special coach designed for inspection of the catenaries in electrified sections. It has an IRY shell mounted on IR-20 bogies, with a rated top speed of 160km/h. (It is an unpowered vehicle and must be hauled by a loco.) It has a pantograph (a dummy -- does not draw current) which is used to test and record various mechanical characteristics of the pantograph-catenaries interaction while the coach is in motion.