Submarine flotilla in Bergen 2nd submarine flotilla in Bergen, Norway. In the center is U-2511. This is the only boat of the TWENTY-FIRST series, which completed its patrols April 30, 1945 U-2511 commanded by Captain Adalbert Schnee after a patrol into the Caribbean Sea. May 2, 1945 after safely passed two English anti-submarine cordons appeared in the Atlantic. May 4, 1945 just to receive a radio order to suspend patrols and to return to base in connection with the surrender of Germany.
U-boat Type XXI, aka "Elektroboote", a submersible with 7 watertight compartments, increased battery capacity, tremendous underwater range. Much quieter than the Type VII. Had the Germans come up with this type submarine sooner, the outcome of the War might have been significantly different.