Radio Direction-finding; Radio Navigation; Determining Distance Or Velocity By Use Of Radio Waves; Locating Or Presence-detecting By Use Of The Reflection Or Reradiation Of Radio Waves; Analogous Arrangements Using Other Waves
G06F
Electric Digital Data Processing
G01C
Measuring Distances, Levels Or Bearings; Surveying; Navigation; Gyroscopic Instruments; Photogrammetry Or Videogrammetry
H04B
Transmission
B64D
Equipment For Fitting In Or To Aircraft; Flying Suits; Parachutes; Arrangements Or Mounting Of Power Plants Or Propulsion Transmissions In Aircraft
