The European Space Agency has successfully tested a new tracking system that will allow its new automated cargo ship dock to the International Space Station. The "videometer" (VDM) is a device attached to the Automated Transfer Vehicle (ATV) which uses eye-like sensors to track the position and orientation of the station to dock with it. The device was tested in a 600-metre long building, with the VDM guiding a simulated vehicle approaching a station mockup. It locked on at 313 metres and guided the simulated vehicle into dock perfectly on the first test.