scope:

The metal cone cathode ray tube covered by this specification is round, 22-inches in diameter with magnetic major deflection angle of 62 degrees and electrostatic focusing. The faceplate will be bonded by an implosion panel as specified herein. The tube is to be used for the FAA National Airspace System (NAS) Computer Display Channel (CDC) Type FA-7912 Plan View Display (PVD) to display alphanumeric, symbolic and map data which will enable air traffic controllers to safely and efficiently control air traffic. This tube, when properly installed using the Installation Kit and Installation Procedure specified in FAA-E-2598 will serve as an alternative to the use of an all-glass, 23-inch diameter cathode ray tube which is specified in FAA-E-2573.