FIG. 1 is a top perspective view of a navigation device. FIG. 2 is a front view of the navigation device. FIG. 3 is a rear view of the navigation device. FIG. 4 is a top view of the navigation device. FIG. 5 is a left side view of the navigation device. FIG. 6 is a bottom view of the navigation device; and, FIG. 7 is a right side view of the navigation device.