There are two decks forward and a single deck machinery space aft. The hull is coated with tiles to cut down the sonar and acoustic signature. Increased automation of the systems allows the crew numbers to be reduced to half that of similar sized post war submarines. There were only four boats built and put into service. These have now been sold to Canada.
Lets hope they turn out to be as successful as was thought.
Two Paxman -Valenta 16 RPA diesel generators. Two GEC 5000 kw. Mk24, Tigerfish, Spearfish. Surface range 10,000 nm .