no recording available
very friendly and informative letter from Copenhagen, including
the chart mentioned below (Rudy van Dalen, 1992)
this chart from the danish civil aviation administration shows
the islands, and the NDB locations for aviation purposes (1992)
see this beautiful letter from the collection of Lars Lundström,
showing the lighthouse with antenna, issued by the local administration
(2005)
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Callsigns:
AB
Frequencies Morse Telegraphy:
381