I have two ports on the Baltic Coast, a size 4 with 46% damage and a size 3 with 47% damage. One is a supply source, the other is not. If it was 50% - port size then either both should work, or neither should work. It is driving me crazy, especially on the Black Sea/Sea of Azov front, where none of the captured ports seem to work until I don't need them anymore.
Any insight is appreciated.

