Postwar photo of Hecht (S 171), (former Type XXIII submarine U-2367). An identical sister ship of U-4711.
History
Nazi Germany
Name	U-4711
Ordered	7 July 1944
Builder	Friedrich Krupp Germaniawerft AG, Kiel
Yard number	953
Laid down	1 December 1944
Launched	21 February 1945
Commissioned	21 March 1945
Fate	Scuttled on 4 May 1945
General characteristics
Class and type	Type XXIII submarine
Displacement	234 t (230 long tons) (surfaced) 258 t (254 long tons) (submerged)
Length	34.68 m (113 ft 9 in) (o/a) 26.00 m (85 ft 4 in) (p/h)
Beam	3.02 m (9 ft 11 in) (o/a) 3.00 m (9 ft 10 in) (p/h)
Draught	3.66 m (12 ft)
Installed power	575–630 PS (423–463 kW; 567–621 shp) (diesel drive) 580 PS (430 kW; 570 shp) (standard electric drive) 35 PS (26 kW; 35 shp) (silent electric drive)
Propulsion	1 × MWM RS134S 6-cylinder diesel engine 1 × AEG GU4463-8 double-acting electric motor 1 × BBC CCR188 electric creeping motor
Speed	9.7 knots (18 km/h; 11 mph) (surfaced) 12.5 knots (23 km/h; 14 mph) (submerged)
Range	2,600 nautical miles (4,800 km; 3,000 mi) at 8 knots (15 km/h; 9.2 mph) surfaced 194 nmi (359 km; 223 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth	180 m (590 ft)
Complement	14–18
Armament	2 × 53.3 cm (21 in) bow torpedo tubes 2 × torpedoes
Service record
Part of:	5th U-boat Flotilla 21 March – 4 May 1945
Identification codes:	M 52 893
Commanders:	Oblt.z.S. Siegfried Endler[1] 21 March – 4 May 1945
Operations:	None
Victories:	None

German submarine U-4711 was a Type XXIII U-boat of Nazi Germany's Kriegsmarine during World War II. She was ordered on 7 July 1944, and was laid down on 1 December 1944 at Friedrich Krupp Germaniawerft AG, Kiel, as yard number 953. She was launched on 21 February 1945 and commissioned under the command of Oberleutnant zur See Siegfried Endler on 21 March 1945.^[2]

Design

Like all Type XXIII U-boats, U-4711 had a displacement of 234 tonnes (230 long tons) when at the surface and 258 tonnes (254 long tons) while submerged. She had a total length of 34.68 m (113 ft 9 in) (o/a), a beam width of 3.02 m (9 ft 11 in) (o/a), and a draught depth of 3.66 m (12 ft). The submarine was powered by one MWM six-cylinder RS134S diesel engine providing 575–630 metric horsepower (423–463 kilowatts; 567–621 shaft horsepower), one AEG GU4463-8 double-acting electric motor electric motor providing 580 PS (430 kW; 570 shp), and one BBC silent running CCR188 electric motor providing 35 PS (26 kW; 35 shp).^[3]

The submarine had a maximum surface speed of 9.7 knots (18.0 km/h; 11.2 mph) and a submerged speed of 12.5 knots (23.2 km/h; 14.4 mph). When submerged, the boat could operate at 4 knots (7.4 km/h; 4.6 mph) for 194 nautical miles (359 km; 223 mi); when surfaced, she could travel 2,600 nautical miles (4,800 km; 3,000 mi) at 8 knots (15 km/h; 9.2 mph). U-4711 was fitted with two 53.3 cm (21 in) torpedo tubes in the bow. She could carry two preloaded torpedoes. The complement was 14–18 men.^[3] This class of U-boat did not carry a deck gun.^[2]

Service history

On 4 May 1945, U-4711 was scuttled at Germaniawerft, Kiel, as part of Operation Regenbogen. The wreck was later raised and broken up.^[2]