The final resting places of six German U-boats sunk in the final months of the Second World War's greatest naval conflict have finally been identified. After years of research, maritime experts say their discoveries will force historians to re-evaluate the battle for control of the Atlantic.

Evidence from the wrecks suggests many U-boats were sunk by mines rather than attacks by Allied air and naval forces, as had previously been believed. The findings show coastal minefields were around three times more effective than British naval intelligence gave them credit for. Experts believe their view was distorted, unintentionally, by reports from over-enthusiastic airmen and escort ship commanders who sometimes claimed they had sunk U-boats with depth charges or anti-submarine mortars....