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Published online by Cambridge University Press: 21 October 2009
During the 1939–1945 conflict, the development of navigational aids, particularly for the purpose of bombing the opposing nation, took place at an unprecedented rate. The life of any system was only the period of time it took scientists of the opposing nation to determine the nature of the aid and devise an appropriate countermeasure. So much so that in several cases, the time from conception to operational service could be measured in months.