Just finished reading the book “Coastal Convoys 1939-1945 – The Indestructible Highway”
Very recommended if you are into Cruel Seas. It has dozens of scenario ideas and tells a lot about the colliers and the coasters used in the coastal convoys. abundant information about the escort vessels and the tactics they used and how they changed in the course of the war.
Very recommended . I read the kindle version. You can get the book here.