OurAirports has records for 7 different navaids with the identifier "OU". Please select the one you'd like to view.
Argentina
322 KHz (OU --- ..-)
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Canada
329 KHz (OU --- ..-)
Republic of the Congo
392 KHz (OU --- ..-)
Indonesia
390 KHz (OU --- ..-)
Kyrgyzstan
780 KHz (OU --- ..-)
New Zealand
302 KHz (OU --- ..-)
Sweden