Description says: "SHBB logos are not beeing used", so it is about the LOGOS of SHBBs.

This is an issue of the vanilla game. The game files include SHBBs/Logos 1-4, altough we only can build one type. Additional to this neither of this logos is beeing used to represent the SHBB status of a ship in any part of the UI.

For making these screenshots I built 1 ship of each type, so I built 4xBB (1-4) and 1 SHBB. To be specific, the "Scharnhorst" is a SHBB. But as u can see there is no SHBB logo used, insead it says that the navy has 5 BBs and the Scharnhorst logo is the same as for BB 1s.

Very helpful