可能这这时期吉米最重要的工作是仪器导航飞行法。
Perhaps Jimmy's most important work during this period involved instrument flying.
其次，研究了基于VOR/DME导航台的区域导航飞行程序的设计方法；
Secondly, this thesis investigates the designing methods for VOR/DME-based area navigation flight procedure (RNAV FP).
其装置包括机载应答识别系统(1)，机载应答识别系统与无人机上的导航飞行控制系统(4)连接。
The device comprises the plane-borne response and recognition system (1) which is connected with the navigation and flight control system (4) on the unmanned plane.
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