The Kind ? U-boat, developed in key during 1933?1944, were a fresh generation of German assault submarines. They'd an infinitely more effective striking force versus Type ?.They had five torpedo tubes, four into the bow and one astern and may carry eleven torpedoes onboard or 22 TMA (23 TMB) mines. In addition they had 88mm fast-firing deck weapon and 20mm AA gun. At the start of the war, the 88mm deck weapon had been very helpful in sinking vendor vessels, enabling the greater costly torpedoes to be conserved for bigger and more valuable objectives. These Type ? U-boats were the spark plug regarding the �Wolf Pack�. Their production was at big members. At exactly the same time, German Navy suffered the big losses of the force, losing 784 U-boat, that 519 had been Type ? U-boat.?