A directional guidance system (1) includes a base (2) configured to be mounted on a surface; and an information carrier (3) mounted on the base. The base further includes a stationary portion (21), suitable for being mounted on a surface, and a movable portion (22) mounted to turn relative to the stationary portion (21) about a vertical axis of rotation (Z-Z). The system is characterized in that the information carrier (3) is mounted to turn relative to the base (2), about an axis of rotation (X-X) that slopes at an angle (α) lying in the range 20° and 90° relative to the vertical axis of rotation (Z-Z). The system is configured in such a manner that the turning movement of the information carrier (3) and the turning movement of the movable portion (22) are linked so that said movements conserve the orientation of said information carrier (3).