Vault sign

The  is a type of sign used in Vault 101 for identifying a level or room or pointing in a general direction to where a level or room is. In a gray housing with an opaque plastic panel, there are indicator lights for signaling the status of a hatch (green - open, red - close), an independent power source for powering the sign, and motion sensors for detecting the movement of the hatch. Black letters and directional symbols are printed onto the panel. This text is visible from at least 20 feet away. Signs are associated with hatches and are often accompanying them. The sign is either ceiling-mounted or wall-mounted in the Vault's corridors.

Configuration #1
A sign is wall-mounted to a wall panel above a hatch.

Examples

 * Atrium (in the Cafeteria, in the Classroom/Clinic corridor)
 * Apartments (in the Cafeteria corridor)
 * Clinic (in the Classroom/Clinic corridor)
 * Filter Room (in the Generator Room (Reactor Level))
 * Reactor Room (in the Storage Room (Reactor Level))
 * Upper Level (directional sign ↑, in the Cafeteria corridor)

Configuration #2
A sign is ceiling-mounted to a ceiling panel near a hatch.

Examples

 * Clinic (directional sign ↑, in the Cafeteria corridor)

Configuration #3
Two signs are ceiling-mounted back-to-back on a ceiling panel.

Examples

 * Classroom (directional sign →, in the Classroom/Clinic corridor)
 * Reactor Level (directional sign →, in the Cafeteria corridor (2 locations))