San Francisco : Architect and Engineer, Inc · leaf 37
AN OPERATIONS BOARD—Evaluated information from filter centers of a defense region isreproduced on a table map of an Army Information Center, where the Controller, on abalcony overlooking the room, is enabled to take appropriate action … AN ARMY FILTER BOARD—Plotters receiving reports of aircraft from civilian observa-tion posts place markers on the map to represent the information given. As markers fromsuccessive reports form a line, the facts they reveal are evaluated or filtered. On thebalcony are tellers, who pass the filtered…
Architecture · Building
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