A Description of the New Secondary Radar System, SECAR, which has been developed jointly by The Marconi Company and Compagnie Francaise Thomson Houston to provide a Comprehensive Data Link between an Air Traffic Controller and Aircraft fitted with a Secondary Radar Transponder. AN entirely new secondary radar system, SECAR, developed jointly by The Marconi Company and Compagnie Francaise Thomson Houston (CFTH), was demonstrated recently under full operating conditions at Marconi's Rivenhall Establishment, near Witham, Essex. SECAR provides a comprehensive data link between an air‐traffic controller and any aircraft fitted with a secondary radar transponder. Vital information concerning position and movement can be extracted automatically from the aircraft by this system, without attention from the aircrew.
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