Abstract: An operating station having an operator's seat and one or more observer's seats movable along a U-shaped track so as to be positioned either behind or on either side of the operator's seat. The track comprises four individual rails to which is mounted a set of four swivel rollers which support a base member of the observer's seat. The rails each have a substantially identical U-shaped configuration, with the center of symmetry of each U-shaped rail being offset from one another in a manner that the base member of the observer's seat is able to move along the entire U-shaped track assembly without changing its orientation with respect to the aircraft. In another configuration, the two halves of the U-shaped rail are made as mirror images of one another.