German submarine U-3514

German submarine U-3514 was a Type XXI U-boat (one of the "Elektroboote") of Nazi Germany's Kriegsmarine, built for service in World War II. She was ordered on 6 November 1943, and was laid down on 21 August 1944 at F Schichau GmbH, Danzig, as yard number 1659. She was launched on 21 October 1944, and commissioned under the command of Oberleutnant zur See Günther Fritze on 9 December 1944.

Design
Like all Type XXI U-boats, U-3514 had a displacement of 1621 t when at the surface and 1819 t while submerged. She had a total length of 76.70 m (o/a), a beam of 8 m, and a draught of 6.32 m. The submarine was powered by two MAN SE supercharged six-cylinder M6V40/46KBB diesel engines each providing 4000 PS, two Siemens-Schuckert GU365/30 double-acting electric motors each providing 5000 PS, and two Siemens-Schuckert silent running GV232/28 electric motors each providing 226 PS.

The submarine had a maximum surface speed of 15.6 kn and a submerged speed of 17.2 kn. When running on silent motors the boat could operate at a speed of 6.1 kn. When submerged, the boat could operate at 5 kn for 340 nmi; when surfaced, she could travel 15500 nmi at 10 kn. U-3514 was fitted with six 53.3 cm torpedo tubes in the bow and four 2 cm C/30 anti-aircraft guns. She could carry twenty-three torpedoes or seventeen torpedoes and twelve mines. The complement was five officers and fifty-two men.

Service history
On 9 May 1945, U-3514 surrendered at Bergen, Norway. She was transferred to Lisahally, Northern Ireland on 6 June 1945, arriving on 8 June 1945.

U-3514 was held at Lisahally until January 1946, when she was taken to Moville. She was being held up in reserve just in case one of the Type XXI that had been transferred to the Soviets after the war did not arrive intact. Then on 7 February 1946, she was ordered to be part of Operation Deadlight. Two days later, on 9 February, she left Moville to be towed to her scuttling area, arriving on the morning of 12 February. HMS Loch Arkaig (K603) began the scuttling process at 09:36 using her QF 4 in Mark V gun, "Squid" depth charges, and "Shark" shells, fired from the four-inch gun. U-3514 sank at 10:04, becoming the last U-boat sunk during Operation Deadlight.

The wreck is at 56°N, -10.08333°W.