claim: Uranium is an element.
evidence: German submarine U-2551 was a Type XXI U-boat of Nazi Germany 's Kriegsmarine during World War II .. Type XXI. Type XXI submarine. U-boat. U-boat. Nazi Germany. Nazi Germany. Kriegsmarine. Kriegsmarine. World War II. World War II. The Elektroboote submarine was laid down on 8 December 1944 at the Blohm & Voss yard at Hamburg , launched on 31 March 1945 , and commissioned on 24 April 1945 under the command of Kapitanleutnant Gerhard Schaar .. laid down. Keel laying. Blohm & Voss. Blohm & Voss. Hamburg. Hamburg. launched. Ceremonial ship launching. commissioned. Ship commissioning. Kapitanleutnant. Kapitanleutnant. Gerhard Schaar. Gerhard Schaar. U-2551 was a brand new , high technology electric boat which could run constantly submerged rather than having to surface to recharge her batteries every day the way submarines until that point had had to do .. Unfortunately for the Germans , these advanced vessels were only introduced to the Kriegsmarine late in 1944 , much too late to influence the Battle of the Atlantic , and too late for many of them to serve in an offensive capacity at all .. Kriegsmarine. Kriegsmarine. Battle of the Atlantic. Battle of the Atlantic. With the end of the war near , training on U-boats had dropped to a minimum due to lack of fuel , falling morale and the effectiveness of allied attacks on U-boat construction and preparation .. U-boat. U-boat. The exception to this were the new Type XXI boats , which continued to train in the Baltic Sea .. Type XXI. Type XXI submarine. Baltic Sea. Baltic Sea