OurAirports has records for 5 different navaids with the identifier "DU". Please select the one you'd like to view.
Australia
251 KHz (DU -.. ..-)
-.. ..-
114.40 MHz (DU -.. ..-)
Hungary
510 KHz (DU -.. ..-)
India
385 KHz (DU -.. ..-)
South Africa
393 KHz (DU -.. ..-)