What are Technological advancements turned the tide on the U-boats?

Technological advancements that turned the tide against U-boats during World War II included the development of sonar, which allowed Allied forces to detect submarines underwater more effectively. The introduction of depth charges and improved anti-submarine warfare tactics, such as coordinated convoy systems, also significantly reduced U-boat effectiveness. Additionally, advancements in aircraft technology enabled long-range patrols and aerial reconnaissance, further diminishing the U-boats' operational capabilities. These innovations collectively shifted the balance in the Battle of the Atlantic.