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positive control [‘pozɪtɪv kɔn’trəul]
gen.	正の制御 Life Science Dictionary (Shuji Kaneko) ; 正の対照 Life Science Dictionary (Shuji Kaneko) ; 陽性対照 Life Science Dictionary (Shuji Kaneko)
English thesaurus
positive control [‘pozɪtɪv kɔn’trəul]
USA	A method of airspace control that relies on positive identification, tracking, and direction of aircraft within an airspace, conducted with electronic means by an agency having the authority and responsibility therein (JP 3-52)