NDB Charleroi *ONC :
here a recording made in 2011 close to the belgian border (rb)
this letter confirms 4 reports of Dieter Pohlmann from 2000, namely *OB-293, *ONC-323, *MAK-360.5, and *DEN-393
see here the PPC for this station (Dieter Pohlmann, 2000)
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Callsigns:
ONC
Frequencies Morse Telegraphy:
320
323