At 07.45 hours on 29 Sep 1939 the neutral Takstaas (Master Kristian M. Eltvedt) was stopped by warning shots from the 20mm gun by U-7 about 10 miles off Marsteinen Lighthouse, outside Bergen, Norway. After examining the papers, Heidel gave the crew 20 minutes to abandon ship in the two lifeboats because the ship was en route to England. At 08.55 hours, the U-boat fired a torpedo that hit on the starboard side amidships and caused a list to starboard but she remained afloat on her load of lumber. The Germans circled the ship and fired with the 20mm gun at the water line until a Norwegian aircraft appeared and forced them to dive. The lifeboats were later taken in tow to Sund in Korsfjord by the Norwegian torpedoboat Storm and continued to Bergen on their own. The ship was after a few hours taken in tow by a Norwegian tug, but broke in two and while the foreship sank, the afterpart was towed in and most of her cargo was salvaged.