I know, I know...but. I found an old post (2006) :
http://www.subsim.com/radioroom/show...+enemy+subnets
I tried following the instructions, made my date 10/1939 in mission editor and it shows nothing of mines or subnets. Now, I know for a fact the south approach to Lock Ewe has a subnet...I ran into it in the dark of night! so...why isn't this quite real subnet not showing up in the mission editor for the time period I am in (9-10/1939)?