 For the first time, U-37 began a patrol from a location other than Germany, in Lorient on 17 August, with Victor Oehrn in command once more. It was to focus on operations off the south-west coast of Ireland. Seven ships were sunk during this voyage; five of which were British, one Norwegian, and one Greek. Of these ships, one was from convoy OA 220, the British Brookwood, traveling from Britain to the United States, two were from convoy SC 1, the British sloop HMS Penzance (L28) and Blarimore, sailing from Sydney, Nova Scotia, Canada, to the United Kingdom. After two weeks at sea, U-37 returned to Lorient on 30 August.
