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 and 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.

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