Why had the tide turn in the battleof the Atlantic by mid 1943?

By mid-1943, the tide of the Battle of the Atlantic began to turn in favor of the Allies due to several key factors. The introduction of improved anti-submarine tactics, including the use of depth charges, sonar technology, and the establishment of escort groups for merchant ships, significantly reduced the effectiveness of German U-boats. Additionally, the Allies implemented better coordination and intelligence-sharing, which allowed for more effective tracking and targeting of submarine threats. These advancements, combined with the production of more ships and aircraft, helped to secure vital supply lines across the Atlantic.