German submarine U-1023

	U-1023 in Plymouth harbour in May 1945
History
Nazi Germany
Name	U-1023
Ordered	13 June 1942
Builder	Blohm & Voss, Hamburg
Yard number	223
Laid down	20 May 1943
Launched	3 May 1944
Commissioned	15 June 1944
Fate	Surrendered on 10 May 1945; Sunk on 7 January 1946 during Operation Deadlight;
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	230 m (750 ft); Calculated crush depth: 250–295 m (820–968 ft);
Complement	44-52 officers & ratings
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; 15 June 1944 – 28 February 1945; 11th U-boat Flotilla; 1 March – 8 May 1945;
Identification codes:	M 38 963
Commanders:	Oblt.z.S. Wolfgang Strenger ; 15 June 1944 – 9 March 1945; Kptlt. Heinrich Schroeteler ; 10 March – 10 May 1945;
Operations:	1 patrol:; 25 March – 10 May 1945;
Victories:	1 warship sunk ; (335 tons); 1 merchant ship damaged ; (7,345 GRT);

German submarine U-1023 was a Type VIIC/41 U-boat of Nazi Germany's Kriegsmarine. She was laid down on 20 May 1943 by Blohm & Voss in Hamburg, Germany, and commissioned on 15 June 1944 with Oberleutnant Wolfgang Strenger in command. U-1023 sank one ship and damaged one more for a total of 7,345 GRT and 335 tons. After the war she was sunk in Operation Deadlight.

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