File:Bell telephone magazine (1922) (14569634958).jpg

Identifier: belltelephonevol21mag00amerrich (find matches)
Title: Bell telephone magazine
Year: 1922 (1920s)
Authors: American Telephone and Telegraph Company American Telephone and Telegraph Company. Information Dept
Subjects: Telephone
Publisher: (New York, American Telephone and Telegraph Co., etc.)
Contributing Library: Prelinger Library
Digitizing Sponsor: Internet Archive

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An Army Filter BoardPlotters receiving reports of aircraft from civilian observation posts place markers on themap to represent the information given. As markers from successive reports form a line,the facts they reveal are evaluated or filtered. On the balcony are tellers, who pass thefiltered information by telephone to other plotters at an operations board. Women in all these posts are civilian volunteers 19^2 Telephone Lines and Air Defense 11
Text Appearing After Image:
A Corner of an Operations BoardEvaluated information from filter centers of a defense region is reproduced on such a mapat an Army Information Center, where the Controller, on a balcony overlooking the room, is enabled to take appropriate action Organization at the ArmyInformation Center On a balcony overlooking these threeboards sit the men who decide, andthe men who help them. Contactamong them, even between those whosit side by side, is by telephone. First comes identification of theflight, from location and direction—ifit can be identified. On the balcony,with this responsibility, are represen-tatives—liaison officers—of the Army,the Navy, and the Civil AeronauticsAdministration. On the balcony is the Controller.He is, or acts for, the CommandingOfficer of the region. It is he whoorders into the air, from the most logi-cal field in the region, pursuit of suffi- cient strength to effect interception ofan enemy flight—of which more in amoment. Acting as liaison officers also

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