a recording from 2012 (rb)
a PPC from the files of Dieter
Pohlmann (2001/2002)
Rudi Renkwitz prepared his report ready-to-sign-and-return in
2002
this picture shows beacon
'PI' of Schwerin airport (rb, 2017)
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Callsigns:
PI
Frequencies Morse Telegraphy:
333