November, sank . Between then and 16 November, several other attacks occurred. On 16 November, U-173 returned to the area. That time though, the U-boat failed to make good her escape. Woolsey, still on antisubmarine patrol, at noon off the harbor mouth caught the submarine's reflection with her sonar and, joined by and , charged to the attack. The three destroyers made a coordinated depth charge assault that destroyed U-173. The following day, Woolsey departed the Moroccan coast to return to Hampton Roads, where she arrived on 30 November. Escort duty After a series of training operations along the eastern seaboard primarily off the New England coast the destroyer began duty escorting transatlantic convoys in mid-January 1943. On 14 January, she departed New York with Convoy UGF-4. The convoy reached Casablanca on 25 January, and, after a week in port, Woolsey escorted the return convoy, GUF-4, back to New York, arriving there on 13 February. At the beginning of March, she helped shepherd Convoy UGF-6 to Casablanca, then made a brief round-trip voyage from Casablanca to Gibraltar and back before returning to the east coast with GUF-6 early in April. The warship then plied the waters of the eastern seaboard until mid-May, conducting antisubmarine patrols and screening coastwise convoys between Norfolk and New York. On 14 May, Woolsey put to sea from New York with her last transatlantic convoy, UGS-8. She and her charges reached Casablanca on 1 June, and the destroyer remained there a fortnight. On 15 June, she departed Morocco, but, instead of returning to the United States as she had done in the past, she headed via Gibraltar to Algiers on the Mediterranean coast of North Africa. Mediterranean operations When Woolsey reached Gibraltar the next day, an Atlantic phase of her wartime career ended, and the Mediterranean phase began. She reported for duty with the 8th Fleet just in time to participate in the invasion of Sicily, and operations in Italian waters consumed the bulk of her time and energy during the ensuing eight months. For the Sicily assault, she drew duty as a fire-support ship for one of three sectors into which the Licata landing beaches were divided. Save for one brief round-trip voyage to Algiers in mid-July, Woolsey provided gunfire support for the troops operating ashore on Sicily and helped to defend Allied shipping from German air attacks. Though she appears not to have accounted