Summary: Animated Army Instructional film giving a brief overview of electronic warfare, with the focus on active jamming rather than passive intelligence gathering. The film explains the basic principles of radar jamming, the main methods available and how these can be applied to different types of radar. Electronic Counter Counter Measures (ECCM), the means by which jamming can be countered, are also discussed, with reference to the jamming methods already outlined. The film emphasises the importance of radar security, and that during peacetime a potential enemy will be making every effort to gather intelligence regarding radar performance and characteristics.