History
Nazi Germany
Name	U-3021
Ordered	6 November 1943
Builder	AG Weser, Bremen
Yard number	1180
Laid down	26 September 1944
Launched	27 November 1944
Commissioned	12 January 1945
Fate	Scuttled on 2 May 1945
General characteristics
Class and type	Type XXI submarine
Displacement	1,621 t (1,595 long tons) surfaced 1,819 t (1,790 long tons) submerged
Length	76.70 m (251 ft 8 in) (o/a) 60.50 m (198 ft 6 in) (p/h)
Beam	8 m (26 ft 3 in) (o/a) 5.3 m (17 ft 5 in) (p/h)
Height	11.30 m (37 ft 1 in)
Draught	6.32 m (20 ft 9 in)
Installed power	4,000 PS (2,900 kW; 3,900 shp) (diesel drive) 5,000 PS (3,700 kW; 4,900 shp) (standard electric drive) 226 PS (166 kW; 223 shp) (silent electric drive)
Propulsion	Diesel/Electric 2 × MAN M6V40/46KBB supercharged 6-cylinder diesel engines 2 × SSW GU365/30 double-acting electric motors 2 × SSW GV232/28 silent running electric motors
Speed	Surfaced: 15.6 knots (28.9 km/h; 18.0 mph) (diesel) 17.9 knots (33.2 km/h; 20.6 mph) (electric) Submerged: 17.2 knots (31.9 km/h; 19.8 mph) (electric) 6.1 knots (11.3 km/h; 7.0 mph) (silent running motors)
Range	15,500 nmi (28,700 km; 17,800 mi) at 10 knots (19 km/h; 12 mph) surfaced 340 nmi (630 km; 390 mi) at 5 knots (9.3 km/h; 5.8 mph) submerged
Test depth	280 m (920 ft)
Complement	57–60 crewmen
Sensors and processing systems	Type F432 D2 Radar Transmitter FuMB Ant 3 Bali Radar Detector
Armament	6 × bow torpedo tubes 23 × 53.3 cm (21 in) torpedoes or 17 × torpedoes and 12 × TMC mines 4 × 2 cm (0.8 in) AA guns or 4 × 3.7 cm (1.5 in) AA guns
Service record
Part of:	4th U-boat Flotilla 12 January – 2 May 1945
Identification codes:	M 49 972
Commanders:	Oblt.z.S. Kurt van Meeteren[1] 12 January – 2 May 1945
Operations:	None
Victories:	None

German submarine U-3021 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 26 September 1944 at AG Weser, Bremen as yard number 1180. She was launched on 27 November 1944, and commissioned under the command of Oberleutnant zur See Kurt van Meeteren on 12 January 1945.^[2]

Design

Like all Type XXI U-boats, U-3021 had a displacement of 1,621 tonnes (1,595 long tons) when at the surface and 1,819 tonnes (1,790 long tons) while submerged. She had a total length of 76.70 m (251 ft 8 in) (o/a), a beam of 8 m (26 ft 3 in), and a draught of 6.32 m (20 ft 9 in).^[3] The submarine was powered by two MAN SE supercharged six-cylinder M6V40/46KBB diesel engines each providing 4,000 metric horsepower (2,900 kilowatts; 3,900 shaft horsepower), two Siemens-Schuckert GU365/30 double-acting electric motors each providing 5,000 PS (3,700 kW; 4,900 shp), and two Siemens-Schuckert silent running GV232/28 electric motors each providing 226 PS (166 kW; 223 shp).^[3]

The submarine had a maximum surface speed of 15.6 knots (28.9 km/h; 18.0 mph) and a submerged speed of 17.2 knots (31.9 km/h; 19.8 mph). When running on silent motors the boat could operate at a speed of 6.1 knots (11.3 km/h; 7.0 mph). When submerged, the boat could operate at 5 knots (9.3 km/h; 5.8 mph) for 340 nautical miles (630 km; 390 mi); when surfaced, she could travel 15,500 nautical miles (28,700 km; 17,800 mi) at 10 knots (19 km/h; 12 mph).^[3] U-3021 was fitted with six 53.3 cm (21.0 in) torpedo tubes in the bow and four 2 cm (0.79 in) 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.^[3]

Fate

U-3021 was scuttled on 2 May 1945, at Travemünde, as part of Operation Regenbogen. The wreck was later raised and broken up.^[2]