The vision system of RAS (Robot Antartico di Superficie, Surface Antartic Robot) was developed in cooperation between the Univ of Parma and the Univ of Pavia (Italy) in 2000-2001. The vehicle locates the tracks of previous vehicles, for leader-follower missions. It was brought to the South Pole (Antartica) to be extensively tested in 2001 during one of the many Italian scientific missions to Antartica.