I wonder what intelligence they had on Scapa Flow before the raid apart from block ships

Also imo there shouldn't be any DDs or enemy vessels around Holm sound and no vessels east of Scapa during Total Germany campaign . It should be easy to get into .
You could place 2 block ships close together so a sub just squeezes thru . I could add shallow water either side . With Reworked Submarine Damage you wouldn't want to hit the block ships .
No more easy targets after Total Germany though .
Re Attu , less intelligence on my nav bouy map . Not the navmap .