Thames Coastguard :

 

a recording from the collection of Rudy van Dalen (1991)

 

see this PPC from the files of Rudy van Dalen (1993)
a QSL for a selcal transmission (Patrick Robic, 2013)

 

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Frequencies Voice:
1647.5
1662.5
2182
2226
2231

 

Frequencies Radioteletype:
2187.5

 

Systems used:
DSC