German submarine U-540

History
Nazi Germany
Name:	U-540
Ordered:	5 June 1941
Builder:	Deutsche Werft, Hamburg
Yard number:	361
Laid down:	12 May 1942
Launched:	18 December 1942
Commissioned:	10 March 1943
Fate:	Sunk, October 1943 east of Cape Farewell (Greenland) by two British aircraft
General characteristics
Class and type:	Type IXC/40 submarine
Displacement:	1,144 t (1,126 long tons) surfaced 1,257 t (1,237 long tons) submerged
Length:	76.76 m (251 ft 10 in) o/a 58.75 m (192 ft 9 in) pressure hull
Beam:	6.86 m (22 ft 6 in) o/a 4.44 m (14 ft 7 in) pressure hull
Height:	9.60 m (31 ft 6 in)
Draught:	4.67 m (15 ft 4 in)
Installed power:	4,400 PS (3,200 kW; 4,300 bhp) (diesels) 1,000 PS (740 kW; 990 shp) (electric)
Propulsion:	2 shafts 2 × diesel engines 2 × electric motors
Speed:	18.3 knots (33.9 km/h; 21.1 mph) surfaced 7.3 knots (13.5 km/h; 8.4 mph) submerged
Range:	13,850 nmi (25,650 km; 15,940 mi) at 10 knots (19 km/h; 12 mph) surfaced 63 nmi (117 km; 72 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth:	230 m (750 ft)
Complement:	4 officers, 44 enlisted
Armament:	6 × torpedo tubes (4 bow, 2 stern) 22 × 53.3 cm (21 in) torpedoes 1 × 10.5 cm (4.1 in) deck gun (180 rounds) 1 × 3.7 cm (1.5 in) AA gun 1 × twin 2 cm FlaK 30 AA guns
Service record
Part of:	4th U-boat Flotilla 10 March – 30 September 1943 10th U-boat Flotilla 1 – 17 October 1943
Commanders:	Kptlt. Lorenz Kasch 10 March – 17 October 1943
Operations:	4 – 17 October 1943
Victories:	None

German submarine U-540 was a Type IXC U-boat of Nazi Germany's Kriegsmarine during World War II.

She was laid down at the Deutsche Werft (yard) in Hamburg as yard number 361 on 12 May 1942, launched on 18 December and commissioned on 10 March 1943 with Kapitänleutnant Lorenz Kasch in command.

U-540 began her service career with training as part of the 4th U-boat Flotilla from 10 March 1943. She was re-assigned to the 10th flotilla for operations on 1 October.

She carried out one patrol and did not sink any ships. She was a member of one wolfpack.

She was sunk in October 1943 east of Cape Farewell (Greenland) by British aircraft.

German Type IXC/40 submarines were slightly larger than the original Type IXCs. U-540 had a displacement of 1,144 tonnes (1,126 long tons) when at the surface and 1,257 tonnes (1,237 long tons) while submerged. The U-boat had a total length of 76.76 m (251 ft 10 in), a pressure hull length of 58.75 m (192 ft 9 in), a beam of 6.86 m (22 ft 6 in), a height of 9.60 m (31 ft 6 in), and a draught of 4.67 m (15 ft 4 in). The submarine was powered by two MAN M 9 V 40/46 supercharged four-stroke, nine-cylinder diesel engines producing a total of 4,400 metric horsepower (3,240 kW; 4,340 shp) for use while surfaced, two Siemens-Schuckert 2 GU 345/34 double-acting electric motors producing a total of 1,000 shaft horsepower (1,010 PS; 750 kW) for use while submerged. She had two shafts and two 1.92 m (6 ft) propellers. The boat was capable of operating at depths of up to 230 metres (750 ft).

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