This 1943 handbook helped German U-Boats (submarines) navigate the Gulf of St. Lawrence.

Marked "Secret!" (Geheim!) and bearing the national insignia of Nazi Germany, this volume covered the Gulf of St. Lawrence. Two other volumes covered the waters off Newfoundland and the southern part of Nova Scotia, part of a much larger series of navigational handbooks. This example was recovered from U-190 after it surrendered in May 1945.

George Metcalf Archival Collection
CWM 19730174-002a