. Bell telephone magazine . sable indetecting the approach of aircraftfrom the sea and in locating airplanesin the air. Over land, there is a vast system of civilian observation postswhich swiftly report any planes, overthe existing network of commercialtelephone lines, to Army filter cen-ters. There the telephoned reportsare evaluated, and the filtered re-ports are passed on to informationcenters, where the course of approach-ing aircraft is plotted, much as ayachtsman lays out on a navigationchart the course for his days Control Officer, from the infor-mation thus visually before him
. Bell telephone magazine . sable indetecting the approach of aircraftfrom the sea and in locating airplanesin the air. Over land, there is a vast system of civilian observation postswhich swiftly report any planes, overthe existing network of commercialtelephone lines, to Army filter cen-ters. There the telephoned reportsare evaluated, and the filtered re-ports are passed on to informationcenters, where the course of approach-ing aircraft is plotted, much as ayachtsman lays out on a navigationchart the course for his days Control Officer, from the infor-mation thus visually before him, takesappropriate measures to meet the situ-ation thus presented: orders the neces-sary pursuit planes into the air andgives them the course to follow tointercept the enemy; perhaps callsinto action anti-aircraft batteries;orders air raid warnings to areas likelyto be endangered. That is a quick look at the general Bell Telephone Magazine FEBRUARY fliR DEFEnsE communicRTions MILITARY ivy- OBSERVATION REPORTS OFENEMY PLANES. WARNING DISTRICT CENTER ®3 NFORMATIONCENTER OperationsBoard ^ Operotions Officers Civil Air RaidWarning Switchboard -4 CIVILIAN ACTION Other Information CentersAir FieldsInterceptor Plones in FlightAir Corps HeodqVrsOther HeodqtVsArmy, Navy, Coast GuardAnti-Aircraft Stations , To Other District Control Centers To Other WarnirjgDistrict Centers LOCAL CONTROLCENTER
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Keywords: ., bookauthoramerican, bookcentury1900, bookdecade1920, bookyear1922
