OurAirports has records for 7 different navaids with the identifier "PO". Please select the one you'd like to view.
Indonesia
223 KHz (PO .--. ---)
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India
381 KHz (PO .--. ---)
Nigeria
112.10 MHz (PO .--. ---)
Russia
730 KHz (PO .--. ---)
277 KHz (PO .--. ---)
United States
403 KHz (PO .--. ---)
Zimbabwe
377 KHz (PO .--. ---)