Desperation Fuels Innovation: The Type XXI project dates to 1943. Germany was well into a submarine war in the Atlantic, and aimed to choke and starve the United Kingdom from its colonies.

A German submarine from World War II, rumored to have transported Nazi leadership and treasurers to South America following the collapse of Berlin, has been found nearly 73 years after being lost ...

A missing German submarine said to have taken the defeated Nazi leadership to South America has been discovered after being lost at sea for nearly 73 years. The U-3523 was one of Hitler’s Type ...

As George Dvorsky at Gizmodo reports, U-3523 was a type XXI U-boat, the Third Reich’s most advanced long-range submarine.

Outwardly, the Type XXI's influence on modern designs can be seen in her streamlined hull, which sets her apart from any other World War II-era sub. Not that any of that did U-2511 any good.

"The Type XXI was the first genuine submarine that could sail submerged for a prolonged time, and the U-3523 had a range that would have allowed it to sail non-stop all the way to South America." ...