Hapag-Lloyd Hannover :
no recordings available
a PPC from 1981, giving lots of details of the LDOC Station (rb)
see here a PPC from the collection of Joop Balneger (1991)
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Frequencies Voice:
5541
6643
8924
10030
10069
11345
13324
13327
13330
17916
17931
21958
21973