OurAirports has records for 9 different navaids with the identifier "OB". Please select the one you'd like to view.
Argentina
330 KHz (OB --- -...)
--- -...
Belgium
293 KHz (OB --- -...)
China
380 KHz (OB --- -...)
France
395 KHz (OB --- -...)
Japan
326 KHz (OB --- -...)
Libya
261 KHz (OB --- -...)
Russia
290 KHz (OB --- -...)
Slovakia
South Africa
428 KHz (OB --- -...)