directional finding bearing

non-directional beacon (NDB) / non directional beacon

wind relative bearing / wind-relative bearing

automated target detection, tracking, co-ordinate finding and interceptor guidance system

direction finding (DF)

fact-finding mission

height-finding radar

multifunctional radio control, direction finding and suppression system (portable) (MKRPP)

passive direction finding (PDF)

distance-finding station

wind-finding radar

automatic direction-finding equipment

direction-finding receiver

equisignal method (of direction finding)

position finding

short-wave radio DF station (direction finding)

elevation position finding

target finding

target finding device

range finding apparatus

radio position finding

celestial position finding

radio direction finding

radio direction finding chart

radio direction finding net

controlled directional mine

directional-control hydraulic valve

frequency and directional chart

non-directional jumping mine

directional tread type tire

directional control pedal

non-directional radio beacon with marker (NDB/MRB)

non-directional antenna