Description:

2.905 inches outside diameter, 0.125 inches material thickness, retaining ring attachment method, radar set, airborne, except fire control end item identification.

Special Features:

A1rcraft symbol is opaque white, part of outside edge is black as marked and has small indentation near top of window dial

Properties:

A piece of transparent material specifically designed to be placed directly in front of a dial or scale to protect it from foreign matter. It is cut to size and may include a frame. It may have an index line or other marking. See also window, observation; and dial, scale.