0420800,ET,04_amb.aif,0420800.TXT,04plan_M.DIR,0420800R.PIC,@,0420820L.PIC,0420830L.PIC,0420840L.PIC,0420850L.PIC,0420860L.PIC,@,0320210P.PIC,0420100P.PIC,0320212P.PIC,0320215P.PIC,0320220P.PIC,@,0,0,0,Guidance and Navigation