[Fish In The Water]

Originally Posted by Collin Dougherty

That may have been it but how did they hit me if i was surfaced? O.o

Here's a screenshot from the mission editor of the vicinity around Helgoland:



The minefields are set at variable depths, and while most are periscope depth or greater running on the surface is not a guarantee of total safety. This is especially true east of the island where the water is so shallow that the mines are usually quite close to the surface. Also if the sea is rough your keel could dip low enough to make contact.