radio finger printing

The Oxford Companion to World War II | 2001 | 700+ words | Copyright

radio finger printing, method used by the British Far East Combined Bureau to identify the radio transmitters of Japanese warships and shore stations. No two operators transmitted in exactly the same way. Their differences could be recorded by displaying their transmissions on a cathode ray tube and using a cine camera, equipped with very sensitive film, to take high-speed photographs of them. A film library was then built up which, with the input from other radio intelligence sources, such as the ‘Y’ service, ‘was, literally, a dictionary of the transmissions of the main H/F [high frequency] sets of all the major Japanese warships and shore wireless stations. Using this dictionary, ships could be identified without the necessity of identifying the call signs which they used from the traffic they handled’ ( A. J. Marder , Old Friends, New Enemies, Vol. 1, Oxford, 1981, p. 359).

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I. C. B. DEAR and M. R. D. FOOT. "radio finger printing." The Oxford Companion to World War II. 2001. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>.

I. C. B. DEAR and M. R. D. FOOT. "radio finger printing." The Oxford Companion to World War II. 2001. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O129-radiofingerprinting.html

I. C. B. DEAR and M. R. D. FOOT. "radio finger printing." The Oxford Companion to World War II. 2001. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O129-radiofingerprinting.html

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