File:Bell telephone magazine (1922) (14756055095).jpg

Identifier: bellvol25telephonemag00amerrich (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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ft. The laboratory has done muchwork in Improving corner reflectorswhich are used for reflecting radarImpulses sent out by searching craftand which might not otherwise detectso small an object as a rubber liferaft. At the laboratory the CoastGuard is working on the developmentof a lightweight airborne emergencyradio transmitter which could beturned on when a plane is forced toditch and would automatically trans-mit its call letters, dashes, and SOS on8280 kc to enable the high-frequencydirection finder nets to determine thelast position of the distressed air-craft. Other current projects includethe development of an automaticalarm for use by aircraft which wouldplace at their disposal the same meansof summoning aid as now utilized byvessels. These examples Illustrate one phaseof the laboratorys function: develop-ment of communications equipment,the need for which Is recognized, tothe point where commercial manufac-turers can produce it to Coast Guard 2l8 hell Telephone Magazine WINTER
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Coast Guard communi-cation installations.Left: Equipment atRadio Washington,key station of the CoastGuard emergency net-work and in the han-dling of traffic for theNorth Atlantic Weatherand Ice Patrols. Be-low: Teletypewriters atEastern Area Head-quarters in New York,showing at left part ofthe search-and-rescueplotting board ^x^s&^Sts^-.^ii 1946-47 The Coast Guard Operates Through Communications 219 standard specifications. Equally Im-portant Is Its work of testing newequipment submitted to It for ap-proval and of checking up on equip-ment purchased to see that It Is as or-dered and required by the specifica-tions. In addition to the work carriedon by Radio Washington, the CoastGuard electronics test station at Fen-wick Island, Delaware, contributesgreatly to Coast Guard electronics bytesting LoRAN, Racon (radar bea-can—aircraft), and Radio Beaconbuoy equipment. This station insome measure made possible the suc-cessful use of LoRAN equipment whenthat system was so urgently requi

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