I was doing a research about a local legend in a small fishing village on the north shore of the st-Lawrence river. It stated that there was a sunk u-boat near the coast & village. After consulting the U-boat database, I found that the germans never lost a ship in these operations. So, legend it was! But I also found this intersting document about this particular period.
It refers to the many ships sunked by u-boats in 1942;
The closing of the waterway to all military traffic because of U-boats;
The political turmoil it caused and propaganda;
and finally the use of land-based radars to try to pick u-boats on the surface.
the quality of the graphics is poor, as it comes from a printed pdf which I lost somewher in my HD…