 From its first voyage, on 20 June 1944, until the end of the war, "U-427" never destroyed any of its targets.It fired torpedoes at two vessels, and on 29 April 1945, missing both, but it was for its ability to survive under harrowing circumstances that "U-427" became known.In April 1945, leading up to, during, and after those two attacks, "U-427" survived 678 depth charge attempts.