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E-3“望楼”是波音公司为美国空军研制的全天候远程空中预警和控制飞机,有下视能力,能在各种地形上空监视有人飞机和无人驾驶飞行器。五十年代,美国的防空警戒体系是由地面预警雷达和预警机EC-121组成。到六十
E-3 “Watchtower ” is a 24-hour long-range airborne warning and control aircraft developed by the Boeing Company for the U.S. Air Force. It has the ability to monitor manned aircraft and unmanned aerial vehicles over various terrains. In the 1950s, the air defense alert system in the United States consisted of the EC-121 ground-based warning radar and AWACS. To sixty