OurAirports has records for 4 different navaids with the identifier "CDO". Please select the one you'd like to view.
Australia
401 KHz (CDO -.-. -.. ---)
-.-. -.. ---
Dominican Republic
114.70 MHz (CDO -.-. -.. ---)
Venezuela
341 KHz (CDO -.-. -.. ---)
112.30 MHz (CDO -.-. -.. ---)