At 18.09 hours on 21 February 1940 the unescorted Loch Maddy (Master William James Park), a straggler from convoy HX-19, was hit on starboard side amidships in the engine room by one G7e torpedo from U-57 (Korth) and was abandoned about 20 miles south-southeast of Copinsay, Orkney Islands. Four crew members were lost. The master and 34 crew members were picked up by HMS Diana (H 49) (LtCdr E.G. Le Geyt, RN) and landed at Scapa Flow.

At 01.07 hours on 22 February, the drifting Loch Maddy was hit on port side amidships by one G7e torpedo from U-23 as coup de grâce about 12 miles southeast of Copinsay and broke in two. The bow section slowly sank vertically, but the stern section remained afloat on the cargo of timber, was later taken in tow by the tug HMS St. Mellons (W 81) (Lt H. King) and beached in the Inganess Bay, Orkney Islands. The cargo was salvaged and the vessel declared a total loss.