German submarine U-1021

History
Nazi Germany
Name	U-1021
Ordered	13 June 1942
Builder	Blohm & Voss, Hamburg
Yard number	221
Laid down	6 May 1943
Launched	13 April 1944
Commissioned	25 May 1944
Fate	Sunk on 14 March 1945
General characteristics
Class & type	Type VIIC/41 submarine
Displacement	759 tonnes (747 long tons) surfaced; 860 t (846 long tons) submerged;
Length	67.10 m (220 ft 2 in) o/a; 50.50 m (165 ft 8 in) pressure hull;
Beam	6.20 m (20 ft 4 in) o/a; 4.70 m (15 ft 5 in) pressure hull;
Height	9.60 m (31 ft 6 in)
Draught	4.74 m (15 ft 7 in)
Installed power	2,800–3,200 PS (2,100–2,400 kW; 2,800–3,200 bhp) (diesels); 750 PS (550 kW; 740 shp) (electric);
Propulsion	2 shafts; 2 × diesel engines; 2 × electric motors;
Speed	17.7 knots (32.8 km/h; 20.4 mph) surfaced; 7.6 knots (14.1 km/h; 8.7 mph) submerged;
Range	8,500 nmi (15,700 km; 9,800 mi) at 10 knots (19 km/h; 12 mph) surfaced; 80 nmi (150 km; 92 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged;
Test depth	250 m (820 ft); Crush depth: 275–325 m (902–1,066 ft);
Complement	4 officers, 40–56 enlisted
Armament	5 × 53.3 cm (21 in) torpedo tubes (4 bow, 1 stern); 14 × torpedoes; 1 × 8.8 cm (3.46 in) deck gun (220 rounds); 1 × 3.7 cm (1.5 in) Flak M42 AA gun; 2 × 2 cm (0.79 in) C/30 AA guns;
Service record
Part of:	31st U-boat Flotilla; 25 May – 30 November 1944; 11th U-boat Flotilla; 1 December 1944 – 14 March 1945;
Identification codes:	M 23 789
Commanders:	Oblt.z.S. William Holpert; 25 May 1944 – 14 March 1945;
Operations:	1 patrol:; 20 February – 14 March 1945;
Victories:	None

German submarine U-1021 was a Type VIIC/41 U-boat of Nazi Germany's Kriegsmarine during World War II.

Laid down on 6 May 1943 at the Blohm & Voss yard in Hamburg, the submarine was launched on 13 April 1944, and commissioned on 25 May 1944, under the command of Oberleutnant zur See William Holpert.

History

Nazi Germany
Name	U-1021
Ordered	13 June 1942
Builder	Blohm & Voss, Hamburg
Yard number	221
Laid down	6 May 1943
Launched	13 April 1944
Commissioned	25 May 1944
Fate	Sunk on 14 March 1945
General characteristics
Class & type	Type VIIC/41 submarine
Displacement	759 tonnes (747 long tons) surfaced 860 t (846 long tons) submerged
Length	67.10 m (220 ft 2 in) o/a 50.50 m (165 ft 8 in) pressure hull
Beam	6.20 m (20 ft 4 in) o/a 4.70 m (15 ft 5 in) pressure hull
Height	9.60 m (31 ft 6 in)
Draught	4.74 m (15 ft 7 in)
Installed power	2,800–3,200 PS (2,100–2,400 kW; 2,800–3,200 bhp) (diesels) 750 PS (550 kW; 740 shp) (electric)
Propulsion	2 shafts 2 × diesel engines 2 × electric motors
Speed	17.7 knots (32.8 km/h; 20.4 mph) surfaced 7.6 knots (14.1 km/h; 8.7 mph) submerged
Range	8,500 nmi (15,700 km; 9,800 mi) at 10 knots (19 km/h; 12 mph) surfaced 80 nmi (150 km; 92 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth	250 m (820 ft) Crush depth: 275–325 m (902–1,066 ft)
Complement	4 officers, 40–56 enlisted
Armament	5 × 53.3 cm (21 in) torpedo tubes (4 bow, 1 stern) 14 × torpedoes 1 × 8.8 cm (3.46 in) deck gun (220 rounds) 1 × 3.7 cm (1.5 in) Flak M42 AA gun 2 × 2 cm (0.79 in) C/30 AA guns
Service record
Part of:	31st U-boat Flotilla 25 May – 30 November 1944 11th U-boat Flotilla 1 December 1944 – 14 March 1945
Identification codes:	M 23 789
Commanders:	Oblt.z.S. William Holpert 25 May 1944 – 14 March 1945
Operations:	1 patrol: 20 February – 14 March 1945
Victories:	None