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Environment ATD. ACTEX Advanced Controls Technology Experiment. Active In surveillance, an adjective applied to actions or equipment, which emit energy capable of being detected, e.g., radar is an active sensor. Active Air Defense Direct defensive actions taken to nullify or reduce the effectiveness of hostile air action. It includes such measures as the use of aircraft, air defense weapons, weapons not used primarily in an air defense role and electronic warfare. Active Communications Security Threat Threats to an electronic system posed by a capability to disrupt communications or to seize control or deny positive control of electronic systems to intended users, e.g., jamming |
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