Last time, i was in a Typ 206 Sub, there was a Kind of Waterfall Display like in the LA Class, but it drawn the Contacts with Pencils on a running paper, like the MAD in the Orion in DW. There was written "Breitband, Schmalband" what called "Broadband and Narrowband".
But this was some years ago, i am not sure...
This was in the Technical Museum in Spyer, Germany. And yes, i am German...
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