Homing Camera

The Homing Camera is a ball-like object that was used to track movements of competitors in the Daihaseisai.

Appearance
The device resembles a ball with queer markings all over its surface.

Capabilities and Uses
The somehow the ball-like device can levitate or float up in the air indefinitely, and move on its own, allowing it to track competitors. It has shown to have a camera, as well as speakers and receivers, which allows it to see events unfolding, as well as give announcements and communicate to the players when necessary respectively.

The camera on the ball apparently has enough capabilities to allow it to detect a competitor who is hiding.

Daihasei Festival Arc (Railgun)

 * Main article:Daihasei Festival Arc (Railgun)

The device is first seen being deployed in the Daihaseisai, during the Balloon Hunter competition between Tokiwadai Middle School and another school. It displays its capabilities most prominently, during Kirifu Megumi's confrontation with Omoshi.