On 17 January she sank the  Norwegian whale factory ship Vestfold, which was laden with 17,386 tons of fuel oil, and three British landing craft - HMS LCT-2239, LCT-2267 and LCT-2344 (each 291 tons) - as deck cargo.
On January 17, she launched a successful attack on the Norwegian whale factory ship Vestfold, which was carrying a significant amount of fuel oil, approximately 17,386 tons. As part of this attack, she also targeted three British landing craft, HMS LCT-2239, LCT-2267, and LCT-2344, each weighing around 291 tons.