German submarines, called U-Boats, operated in the river and Gulf of St. Lawrence in 1942 and again in 1944, attacking and sinking merchant ships and warships.

This photograph shows the September 1942 commissioning of the German submarine U-190, which was similar to the U-Boats that operated in the St. Lawrence. As part of the commissioning ceremony, the German navy's ensign flies from the conning tower (left), and is being given the Nazi salute by the submarine's commanding officer (centre right) and by spectators (lower right).

George Metcalf Archival Collection
CWM 19870078-002