"Very little is known about the Type XI-B U-Boat. Neither U-2511 nor its sister ship U-3008 ever fired a torpedo in anger during the war.

Type XI was more than a U-boat. The U-Boat Command intentions were to assign the numbers U-112 through U-115 to the first four vessels of the class. But the Kriegsmarine —the Nazi navy—had put its hopes in winning the naval war on these Type XXI U-boats. Go to Page 2

CORRECTIONS TO PAGE ONE: Type XXI U-boats "Elektroboote" After World War II, the victorious powers (US, UK, Soviet Union)copied the German design …

The U-boat War in World War Two (Kriegsmarine, 1939-1945) and World War One (Kaiserliche Marine, 1914-1918) and the Allied efforts to counter the threat. All official histories state that the vessel type was never built and numerous publications indicate that the Type XI-B submarine design went only as far as a preliminary 'keel laying' at the building yards of Deschimag -A.G. Weser in Bremen, Germany. Two major variants were ultimately proposed in the "Type XXIB" and "Type XXIC" models with the former having an increased number of torpedo tubes to twelve while the latter would have seen its torpedo tubes increased to a an optimistic eighteen. It was in fact a U-cruiser.With a submerged displacement of 4,650 tons, six torpedo tubes and a gun armament of four 128-mm guns in two twin gun turrets it would have been the heaviest-armed U-boat and the second-largest (after the Japanese I … However, Kriegsmarine commissioning records reflect no such assignment of numbers and for all practical purposes the Type XI was never officially commissioned. The Type XXI U-boat series began with U-2501 and ended with the U-3530. Over 40.000 pages on the officers, the boats, technology and the Allied efforts to counter the U-boat threat. Much more.