U-977, commanded by Captain Heinz Schäffer, is famous for surrendering to Argentine authorities in 1945, claiming it had been at sea when Germany surrendered. But the more interesting story is U-530, commanded by Otto Wermuth, which also surrendered in Argentina weeks later, claiming the same thing. The Argentine navy interrogated both crews for months. Neither submarine had nuclear material or gold. Wermuth, during his interrogation, casually mentioned that Wernher von Braun had been aboard U-530 as a passenger in 1945 — a claim that was dismissed at the time but has never been definitively disproven. The Argentine government quietly expelled both crews in 1946 after pressure from the US and Britain. Wermuth later returned to Germany and died in 2005. The von Braun claim was re-examined in 1995 by US naval historian Robert W. Allen, who found it "plausible but unprovable."