Her duties were chiefly convoy defence and trade protection against German U-boats operating in the Indian Ocean with a shore base at Trincomalee. She took an active part in the war, heading the hunter-killer group which sank in the Indian Ocean on 12 August 1944. Alerted to the submarine's presence in the area, 851's Avengers located the U-boat and attempted to attack her, and directed the other ships in the group, , the and the sloop to a point where the U-boat was depth charged resulting in it sinking.