Since the 1930s Walter had proposed that U-boats be powered with electric motors and that their energy come from storage batteries. The Type XXI, alongside the later XXIIIs, were the culmination ...

U-2511 was one of Germany’s new Type XXI-class “wonder” submarines, and she was hunting for Allied ships. She also represented one of the Third Reich’s biggest failures.

U-2511 was one of Germany’s new Type XXI-class “wonder” submarines, and she was hunting for Allied ships. She also represented one of the Third Reich’s biggest failures.

As George Dvorsky at Gizmodo reports, U-3523 was a type XXI U-boat, the Third Reich’s most advanced long-range submarine. Some researchers have speculated that the wreck could have been used to ...