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The Hon K.C. Beazley MP, Australia's Minister for Defence recently visited Marconi Communication Systems Ltd (MCSL) Chelmsford. During the visit he witnessed a demonstration of a new, high‐power, high‐frequency transmitter designed for the Alice Springs experimental Over The Horizon Radar (OTHR). The facility will provide Australia with the world's most advanced operational land‐based early‐warning system with the ability to detect and display targets at distances greater than two thousand kilometres. In contrast, conventional radar systems, such as those used by air traffic control, have a range of only a few hundred kilometres.