Domestic robotic system and robot therefor

A domestic robotic system that includes a robot, which is programmed to move within a working area defined by a boundary and has one or more boundary distance sensors that enable it to estimate the current distance from the boundary; the robot is programmed firstly so as to move across the working area and, secondly, so that when the boundary distance sensors indicate that the robot is a distance X away from the boundary and is approaching the boundary, the robot begins performing a gradual turn; this gradual turn is such that: the robot progressively changes direction while continuing to move across said working area; and the robot transitions from approaching the boundary to receding from the boundary; the robot is also programmed so as to calculate a path for the gradual turn such that, during the gradual turn, the robot approaches the boundary to a predetermined closest distance, E, and thereafter recedes from the boundary.