The British focused development on anti-submarine weaponry and tactics, such as sonar and convoys, while Germany focused on improving its offensive capability, with designs such as the Type VII submarine and wolfpack tactics.
Britania memfokuskan pengembangan persenjataan dan taktik antikapal selam, seperti sonar dan konvoi, sementara Jerman berfokus pada memperbarui kemampuan serangannya dengan desain seperti kapal selam Tipe VII dan taktik wolfpack.