radio direction finding radio fix radio frequency interference radio guidance
radio hole radio homing radio landing aid radio landing beam
radio magnetic indicator radio station radiotelephony network radio waves
radio waves propagation random noise Ratan readback
receiving unit receiving controller reciprocal leg recommended practice
regular aerodrome relative bearing relative bearing indicator relay of messages
reliability reporting line re-route to rescue beacon
rescue coordination centre rescue unit responder beacon restricted area
flare-out rounding out flare route stage
routing indicator run-up area runway alignment beacon runway controller
runway designation markings runway edge light runway environment runway floodlight
runway lighting runway marking runway surface light runway threshold
runway threshold marking safe flight instructions safety height safety message
safety standards scalloping scanning scan
scheduled air carrier scheduled airline scheduled air transport scheduled frequency
sea clutter secondary area secondary frequency secondary radar
secondary radar scanner sector scanning beacon self-contained navaid semi-circular cruising levels
sending unit controller sequencing service area service area
shift Shiran Shoran short-haul traffic
signal area signal comparison tracking signature group signification point
Algunos ejemplos : Resolución judicial   Refugiados   Escuela primaria   Agricultura ecológica   Tratamiento del cáncer