German submarine U-409

History
Nazi Germany
Name:	U-409
Ordered:	30 October 1939
Builder:	Danziger Werft, Danzig
Yard number:	110
Laid down:	26 October 1940
Launched:	23 September 1941
Commissioned:	21 January 1942
Fate:	Sunk 12 July 1943 in the Mediterranean in position 37°12′N 04°00′E / 37.200°N 4.000°E / 37.200; 4.000, by depth charges from HMS Inconstant.
General characteristics
Class and type:	Type VIIC submarine
Displacement:	769 tonnes (757 long tons) surfaced 871 t (857 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
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) Crush depth: 250–295 m (820–968 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 x 2 cm (0.79 in) C/30 AA gun
Service record
Part of:	5th U-boat Flotilla 21 January – 31 August 1942 - Training 9th U-boat Flotilla 1 September 1942 – 30 June 1943 29th U-boat Flotilla 1–12 July 1943
Commanders:	Oblt.z.S. Hanns-Ferdinand Massmann 21 January 1942 – 12 July 1943
Operations:	1st patrol: 18 August – 9 September 1942 2nd patrol: 13 October – 5 November 1942 3rd patrol: 7 December 1942 – 5 January 1943 4th patrol: 14 February – 12 April 1943 5th patrol: 18–21 May 1943 6th patrol: 29 June – 12 July 1943
Victories:	4 merchant ships sunk (24,961 GRT) 1 merchant ship damaged (7,519 GRT) 1 warship sunk (10 tons) – lost aboard transport ship

German submarine U-409 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine in World War II. She was laid down on 26 October 1940 by Danziger Werft, Danzig as yard number 110, launched on 23 September 1941 and commissioned on 31 January 1942 under Oberleutnant zur See Hanns-Ferdinand Massmann.

German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-409 had a displacement of 769 tonnes (757 long tons) when at the surface and 871 tonnes (857 long tons) while submerged. She had a total length of 67.10 m (220 ft 2 in), a pressure hull length of 50.50 m (165 ft 8 in), a beam of 6.20 m (20 ft 4 in), a height of 9.60 m (31 ft 6 in), and a draught of 4.74 m (15 ft 7 in). The submarine was powered by two Germaniawerft F46 four-stroke, six-cylinder supercharged diesel engines producing a total of 2,800 to 3,200 metric horsepower (2,060 to 2,350 kW; 2,760 to 3,160 shp) for use while surfaced, two Siemens-Schuckert GU 343/38–8 double-acting electric motors producing a total of 750 metric horsepower (550 kW; 740 shp) for use while submerged. She had two shafts and two 1.23 m (4 ft) propellers. The boat was capable of operating at depths of up to 230 metres (750 ft).

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