The user can follow the path of the bronchoscope on a navigation map. Zooming in and out on the map can be done with ease. The navigation map may reduce the difference between novices and skilled physicians on their techniques, such as the duration of bronchoscopy, contact with airway wall, etc. In addition, automation in some systems facilitates routine examinations. When a bronchoscope returns to a position that has been used for a given patient, it will automatically display the previous images (Fig. 6.4).