Reassigned to more southerly routes, "Schenck" resumed convoy escort duties on 28 April 1943, and, during the summer, escorted convoys between east coast ports, the Caribbean, and North Africa. She returned to Chesapeake Bay with a convoy on 26 October 1943, and, after overhaul and training, joined a hunter-killer group built around the escort carrier . The group conducted patrols against enemy submarines near the Azores between 24 November 1943 and 2 January 1944. The high point of "Schenck" war service came on 24 December 1943, when the group located a concentration of U-boats. After stalking radar and sound contacts for most of the night and making six attacks, "Schenck" heard an underwater explosion and saw an oil slick which marked the end of . Almost immediately, another submarine sank "Schenck"s squadronmate, . "Schenck" continued her ASW operations and was later commended by the task group commander for her role in preventing a concentrated wolf pack attack on "Card"; for her continued aggressive action after the sinking of "Leary", despite having only fourteen depth charges left; and for her skillful rescue of "Leary"s survivors.