this is a 5 minute recording
of the traffic of the LORAN navigational net (net control station:
NMS Shetland Islands), OUN shows
up in the first and fourth minute (rb, 1974).
see this detailed letter (swedish? danish?) and the card from
the files of Lars Lundström (1971)
for those with less nordic language knowledge, please read this
letter from the files of Maarten van Delft (1971)
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Callsigns:
OUN
Frequencies Voice:
3607
4857.5
6779
7357.5
7512.5
7715
10337.5
13423
Frequencies Radioteletype:
100