German submarine U-584

German submarine U-584 was a Type VIIC U-boat built for Nazi Germany's Kriegsmarine for service during World War II. She was laid down on 1 October 1940 by Blohm & Voss, Hamburg as yard number 560, launched on 26 June 1941 and commissioned on 21 August 1941 under Kapitänleunant Joachim Deecke.

Design
German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-584 had a displacement of 769 t when at the surface and 871 t while submerged. She had a total length of 67.10 m, a pressure hull length of 50.50 m, a beam of 6.20 m, a height of 9.60 m, and a draught of 4.74 m. The submarine was powered by two Germaniawerft F46 four-stroke, six-cylinder supercharged diesel engines producing a total of 2800 to 3200 PS for use while surfaced, two Brown, Boveri & Cie GG UB 720/8 double-acting electric motors producing a total of 750 PS for use while submerged. She had two shafts and two 1.23 m propellers. The boat was capable of operating at depths of up to 230 m.

The submarine had a maximum surface speed of 17.7 kn and a maximum submerged speed of 7.6 kn. When submerged, the boat could operate for 80 nmi at 4 kn; when surfaced, she could travel 8500 nmi at 10 kn. U-584 was fitted with five 53.3 cm torpedo tubes (four fitted at the bow and one at the stern), fourteen torpedoes, one 8.8 cm SK C/35 naval gun, 220 rounds, and a 2 cm C/30 anti-aircraft gun. The boat had a complement of between forty-four and sixty.

Service history
The boat's career began with training at 5th U-boat Flotilla on 21 August 1941, followed by active service on 1 December 1941 as part of the 1st Flotilla for the remainder of her service.

In 10 patrols she sank three merchant ships, for a total of and one warship of 206 tons.

US Saboteur Landing
On 25 May 1942, the boat departed Brest, France for a special mission as part of Operation Pastorius. On 18 June, she landed a 4-man saboteur team just south of Jacksonville, Florida. This was one of two teams landed within a week of each other on the US east coast; the other team came aboard GS U-202. The boat then returned safely to Brest on 22 July.

Wolfpacks
U-584 took part in 16 wolfpacks, namely:
 * Ulan (25 December 1941 – 10 January 1942)
 * Stier (29 August – 2 September 1942)
 * Vorwärts (2 – 26 September 1942)
 * Luchs (27 – 29 September 1942)
 * Letzte Ritter (29 September – 1 October 1942)
 * Falke (4 – 19 January 1943)
 * Landsknecht (19 – 28 January 1943)
 * Hartherz (3 – 7 February 1943)
 * Löwenherz (1 – 10 April 1943)
 * Lerche (10 – 15 April 1943)
 * Specht (21 April – 4 May 1943)
 * Fink (4 – 6 May 1943)
 * Elbe (7 – 10 May 1943)
 * Elbe 1 (10 – 14 May 1943)
 * Leuthen (15 – 24 September 1943)
 * Rossbach (24 September – 6 October 1943)

Fate
U-584 was sunk on 31 October 1943 in the North Atlantic in position 49.23333°N, -31.91667°W, by depth charges from US Avenger aircraft operating from escort carrier USS Card (CVE-11). All hands were lost.