Ok i have an answer i was wondering about...i finally found an unescorted small convoy.
I thought there wasn’t any in Ccom12, but yes it seems.
So it’s according to what it was in RL.
On side note, the escorted i already found was heading Skagerrak...so it’s kind of normal in those ennemy areas
The one non escorted was North West England...quite safe area at war start.