Radar Contact is the condition that exits when an aircraft has been identified on the radar display and radar services are being provided. 雷达已识别是指一架飞机已经在雷达上被雷达识别并且即将被提供雷达服务的情形。
An aeroplane shrouded in such kit might be invisible to the human eye but it would be picked up readily by radar, which operates at radio wavelengths. 用这种东西罩住的飞机对于人眼来说可能是隐形的，却会轻而易举地被雷达识别，因为雷达是工作在无线电波段的。
