The present invention has an object to provide a door mirror for an automobile in which a variation in a gap between a bottom wall of a housing and a pedestal portion of a door-mirror base is eliminated. Current flight status data of the host aircraft and at least a second aircraft is obtained, and a vertical traffic scenario including at least the host aircraft ant the second aircraft is rendered on the display. The trust attributes are defined hierarchically so that processes cannot access objects with higher trust levels than themselves. Detection circuits detect a voltage higher than an over-charge detection voltage of the secondary batteries. The cross-member may have a first end coupled to the first steering arm and a second end coupled to the second steering arm.