|Ordered||6 Nov 1943|
|Laid down||9 Jul 1944||F Schichau GmbH, Danzig (werk 1650)|
|Launched||25 Aug 1944|
|Commissioned||7 Oct 1944||Oblt. Horst Willner|
|Successes||No ships sunk or damaged|
Sunk at 1730hrs on 3 April, 1945 at Kiel, by bombs.
Wreck broken up.1 dead, unknown number of survivors.
General notes on this boat
2 Apr 1945. On 28 March 1945 Oblt. Horst Willner took his new Elektro boat Type XXI U-3505 from Gotenhafen (Gdynia, Poland) and rescued 110 women and children, including his own wife and child. They had planned to escape on the liner Wilhelm Gustloff and had even boarded the ship when Willner came aboard and took them to his base. Wilhelm Gustloff was then sunk with about 9,400 people lost. Willner brought the boat to Travemünde (Lübeck) on 2 April.
Men lost from U-boats
Unlike many other U-boats, which during their service lost men due to accidents and various other causes, U-3505 did not suffer any casualties (we know of) until the time of her loss.