The Sort ? U-boat, developed in key during 1933?1944, was at truth a fresh generation of German assault submarines. They might a effective striking force versus Type ?.They had five torpedo pipes, four inside bow and one astern and might carry eleven torpedoes onboard or 22 TMA (23 TMB) mines. Also had 88mm fast-firing deck unit and 20mm AA device. At first about the war, the 88mm deck weapon finished up being useful in sinking vendor vessels, permitting the bigger costly torpedoes be conserved for bigger and much more valuable objectives. These Type ? U-boats was truly the spark plug towards �Wolf Pack�. Their production was at big users. At exactly the same time, German Navy suffered the most effective losings by using this force, losing 784 U-boat, which 519 was at fact Type ? U-boat.?