Abstract: A route guidance system for guiding occupants of an enclosed space to a location, such as an exit, the system including a control module with display screen and means for displaying an image of the enclosed space on the display screen. The displayed image is a scale representation of the enclosed space, preferably a bitmap of an architectural drawing of the enclosed space. The control module includes means for enabling a user to locate computer generated icons on the display screen. The control module determines the real world location of the components represented by the icons and communicates this to the relevant system components.