During the first two weeks of September, "Turner" conducted anti-submarine warfare (ASW) training at Casco Bay, Maine, and then returned to New York to prepare for her second transatlantic voyage. On 21 September, the destroyer headed south to Norfolk. She arrived there on 23 September and, the following day, headed out across the Atlantic with her convoy. After an 18-day passage, during which she made one depth charge attack on a sound contact, "Turner" arrived at Casablanca on 12 October. Four days later, she departed again and headed for Gibraltar to join another convoy. The warship reached the strategic base on 17 October and, after two days in port, stood out to join the screen of convoy GUS 18.