The ATV would employ a combination of GPS and astronavigation techniques to automatically rendezvous with the Space Station. Telemetry contact was established between the ISS and ATV during its preparations for the final approach. Once at a distance of 249 m, the onboard computers of the ATV employed both videometer and telegoniometer data to perform the final approach and docking manoeuvres; the docking itself to the "Zvezda" module, was fully automated. In the event of any last-minute technical issues or problems, a pre-programmed sequence of anti-collision manoeuvres, fully independent of the main navigation system, can be activated by the flight engineers aboard the station. Upon contact with the module, the automatic capture sequence would be activated.