break off its attack leaving Sackville to rescue two survivors from an abandoned but still floating merchant ship. Only a few hours later, Sackville detected on the surface with radar and landed a four-inch shell on the submarine's conning tower followed by a depth charge. U-552 nearly sank but managed to regain control and creep back to Germany heavily damaged. Sackvilles attacks had played a key role in allowing the 41 ship convoy to escape with the loss of only two ships. Sackville continued in her escort role until starting an extensive refit at Thompson Bros. Machinery Co. Ltd. in Liverpool, Nova Scotia in January 1943. She returned to service in April and was assigned to Escort Group C-1 where she remained until reassigned to a new group Escort Group 9 in July. The group was disbanded following the loss of three of its ships on 20–22 September and the ship assigned to group C-2, where the ship remained on Atlantic escort work until going for refit in Galveston, Texas in February 1944. Returning to Halifax in May 1944 the vessel worked up in Bermuda and was then assigned to Escort Group C-2 which left for Derry escorting convoy HX-297 on 29 June 1944. At Derry the boilers were cleaned, which revealed a serious leak in one of them. Repairs were unsuccessful and the ship was no longer considered suitable for convoy escort work. Since the ship had only recently been modernized she was reassigned for training at on 29 August 1944. However, almost immediately afterwards the decision was made to convert her to a loop layer, laying anti-submarine indicator loops across harbour entrances, her damaged boiler removed to provide storage for the cable and the 4-inch gun replaced with a pair of cranes. She remained in this role until paid off in April 1946 and laid up in reserve. Trans-Atlantic convoys escorted Civilian service Most Flower-class corvettes were scrapped shortly after the war, however Sackville was laid up in reserve. She was reactivated in 1952 and converted to a research vessel for the Department of Marine and Fisheries. The armament was removed, the hull repainted black in place of the original dazzle camouflage and the new pennant number 532 painted on the hull (changed to 113 in the late 1950s). A laboratory was built on the aft superstructure in 1964 and the bridge enclosed in 1968. She remained in