Maybe, but I've F12'ed on that eastern side and have yet to find a mine there. However, I did notice some serious shallows in that area. Looked like there was less than a foot of water in random places, there.
I just added minefield, because I've already had this discussion and the replies I got insist that there are mines there.... Although personally, I still think it's because of the depth, due to the terrain mod change of Heloland, in GWX
http://www.subsim.com/radioroom/show...02096&page=107