OurAirports has records for 7 different navaids with the identifier "F". Please select the one you'd like to view.
Argentina
300 KHz (F ..-.)
..-.
305 KHz (F ..-.)
Bulgaria
375 KHz (F ..-.)
Poland
Ukraine
598 KHz (F ..-.)
285 KHz (F ..-.)
Uzbekistan
588 KHz (F ..-.)