|  | 
| History | 
|---|
| Nazi Germany | 
|---|
| Name | U-591 | 
| Ordered | 16 January 1940 | 
| Builder | Blohm & Voss, Hamburg | 
| Yard number | 567 | 
| Laid down | 30 October 1940 | 
| Launched | 20 August 1941 | 
| Commissioned | 9 October 1941 | 
| Fate | Sunk on 30 July 1943 in the South Atlantic near Pernambuco in position 08°36′S 34°34′W / 8.600°S 34.567°W / -8.600; -34.567, by depth charges from a US Lockheed Ventura aircraft. | 
| General characteristics | 
|---|
| Class & type | Type VIIC submarine | 
| Displacement |  | 
| Length |  | 
| Beam | 
6.20 m (20 ft 4 in) o/a4.70 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 |  | 
| Speed | 
17.7 knots (32.8 km/h; 20.4 mph) surfaced7.6 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) surfaced80 nmi (150 km; 92 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged | 
| Test depth |  | 
| Complement | 4 officers, 40–56 enlisted | 
| Armament |  | 
| Service record | 
| Part of: |  | 
| Identification codes: | M 37 230 | 
| Commanders: | 
Kptlt. Hans-Jürgen Zetzsche9 October 1941 – 8 September 1942Oblt.z.S. Peter Schrewe9 September – 12 November 1942Kptlt. Hans-Jürgen Zetzsche12 November 1942 – 17 May 1943Lt.z.S. Joachim Sauerbier15 – 17 May 1943Oblt.z.S. Reimar Ziesmer1 June – 30 July 1943 | 
| Operations: | 
8 patrols:1st patrol:15 January – 20 February 19422nd patrol:1 – 11 April 19423rd patrol:a. 10 May – 2 June 1942b. 4 – 7 June 19424th patrol:a. 27 July – 14 August 1942b. 22 – 24 August 1942c. 27 August 1942d. 28 – 29 August 1942e. 8 – 9 September 1942f. 11 – 12 September 19425th patrol:1 December 1942 – 12 January 19436th patrol:17 February – 7 April 19437th patrol:12 – 17 May 19438th patrol:26 June – 30 July 1943 | 
| Victories: | 
4 merchant ships sunk (19,932 GRT)
1 merchant ship damaged (5,701 GRT)
 | 
German submarine U-591 was a Type VIIC U-boat built for Nazi Germany's Kriegsmarine for service during World War II.
She was laid down on 30 October 1940 by Blohm & Voss, Hamburg as yard number 567, launched on 20 August 1941 and commissioned on 9 October 1941 under Kapitänleutnant Hans-Jürgen Zetzsche.