Swale was to have better fortunes two months later. Escorting slow convoy ONS 7 bound for Halifax, Canada, she sank the off Cape Farewell, Greenland on the night of 17 May. The U-boat had earlier torpedoed the steamer Aymeric, the last British cargo ship in the Atlantic to be sunk that month, claiming the lives of 53 men. Under the command of Lieutenant Commander John Jackson, DSC, RNR, Swale moved astern of the doomed Aymeric and made ASDIC (sonar) contact. After a succession of depth charge and Hedgehog attacks, she was rewarded with the sound of several loud explosions and the appearance of burning oil on the surface. The convoy continued to Canada without further loss.
