In electrodynamic suspension (EDS), both the guideway and the train exert a magnetic field, and the train is levitated by the repulsive and attractive force between these magnetic fields.  In some configurations, the train can be levitated only by repulsive force. In the early stages of maglev development at the Miyazaki test track, a purely repulsive system was used instead of the later repulsive and attractive EDS system.  The magnetic field is produced either by superconducting magnets (as in JR–Maglev) or by an array of permanent magnets (as in Inductrack ). The repulsive and attractive force in the track is created by an induced magnetic field in wires or other conducting strips in the track. A major advantage of EDS maglev systems is that they are dynamically stable – changes in distance between the track and the magnets creates strong forces to return the system to its original position.  In addition, the attractive force varies in the opposite manner, providing the same adjustment effects. No active feedback control is needed.
The route leaves Sydney and travels via the Western and Broken Hill lines to Broken Hill . It then crosses into South Australia on the Broken Hill to Crystal Brook line before heading south to Adelaide . Before the conversion of the Crystal Brook to Adelaide line to standard gauge, passengers for Adelaide had to change at Port Pirie . However, from August 1986, the Indian Pacific was diverted to make an out-and-back trip to Adelaide adding 390 kilometres (240 mi) to the journey. From Crystal Brook it heads north to Port Augusta and then via the Trans-Australian Railway to Kalgoorlie including travelling over the world's longest straight stretch of railway track on the Nullarbor Plain measuring 478 kilometres (297 mi).  It then heads via the Eastern Goldfields and Eastern lines to its terminus at East Perth .