sailing warship off Greenland region

[ALVAMA]

Hello guys, I hope anyone can help me with more info, pictures or anything related to this ''sailing'' warship.
The book of DK Brown 'Future Surface Fleet' quotes: ''It was a study to look into reducing noise when streaming a towed array but it did not help as the electric diesel generators would still make noise, but it could reach 12kts in Greenland waters on sail alone for 80-90% of the year.''

 

[Kugelblitz]

Is there a date for the drawing?

 

[World B4]

The new Pirates of The Caribbean looks... different

 

[DWG]

There's no date given. It just says they've been looked at, but most noise comes from auxiliaries at towed array speeds, so the advantages aren't as much as might be thought.

 

[Grey Havoc]

I suspect it's from around the mid-late 1970s timeframe.