OurAirports has records for 4 different navaids with the identifier "RU". Please select the one you'd like to view.
Canada
391 KHz (RU .-. ..-)
.-. ..-
French Polynesia
372 KHz (RU .-. ..-)
United States
272 KHz (RU .-. ..-)
275 KHz (RU .-. ..-)