VAHLE offers an absolute positioning system (APOS). A reading head similar to a current collector reads positioning off a code rail. The code rail is typically installed with a conductor system (enclosed or unipole). Absolute positioning refers to the accuracy of positioning. For the absolute positioning system the accuracy is ~1mm (~1/32"). Mobile equipment or vehicles can be fully automated with power (conductor system), data transfer (VAHLE data systems) and positioning (VAHLE APOS). From a stationary control room you have the ability to power a moving vehicle, communicate with it, and know precisely where it is located.