|Ordered:||25 September 1939|
|Builder:||Blohm & Voss, Hamburg|
|Laid down:||2 January 1940|
|Launched:||7 December 1940|
|Commissioned:||6 February 1941|
|Fate:||Sunk, 27 June 1941|
|Type:||Type VIIC submarine|
|Displacement:||769 long tons (781 t) surfaced
871 long tons (885 t) submerged
|Length:||67.1 m (220 ft 2 in) o/a
50.5 m (165 ft 8 in) pressure hull
|Beam:||6.2 m (20 ft 4 in) o/a
4.7 m (15 ft 5 in) pressure hull
|Draft:||4.74 m (15 ft 7 in)|
|Propulsion:||2 × supercharged Germaniawerft 6-cylinder 4-stroke M6V 40/46 diesel engines, totalling 2,800–3,200 bhp (2,100–2,400 kW). Max rpm: 470-490
2 × electric motors, totalling 750 shp (560 kW) and max rpm: 296.
|Speed:||17.7 knots (20.4 mph; 32.8 km/h) surfaced
7.6 knots (8.7 mph; 14.1 km/h) submerged
|Range:||15,170 km (8,190 nmi) at 10 kn (19 km/h) surfaced
150 km (81 nmi) at 4 kn (7.4 km/h) submerged
|Test depth:||230 m (750 ft)
Crush depth: 250–295 m (820–970 ft)
|Complement:||44–52 officers & ratings|
|Armament:||• 5 × 533 mm (21 in) torpedo tubes (4 bow, 1 stern)
• 14 × G7e torpedoes or 26 TMA mines
• 1 × C35 88mm gun/L45 deck gun (220 rounds)
• Various AA guns
|Part of:||1st U-boat Flotilla
(6 February–27 June 1941)
|Commanders:||Kptlt. Herbert Wohlfarth
(6 February–27 June 1941)
|Operations:||1st patrol: 1–30 May 1941
2nd patrol: 19–27 June 1941
|Victories:||6 commercial ships sunk (29,552 GRT)
1 commercial ship damaged (4,986 GRT)
German submarine U-556 was a Type VIIC U-boat of the German Kriegsmarine during World War II. The submarine was laid down on 2 January 1940 at the Blohm & Voss yard in Hamburg, launched on 7 December 1940, and commissioned on 6 February 1941 under the command of Kapitänleutnant Herbert Wohlfarth, who commanded her for her entire career. U-556 conducted only two patrols, sinking six ships totalling 29,552 tons and damaging one other grossing 4,986 tons, before she was sunk on 27 June 1941.
U-556 sailed from Kiel for her first patrol on 1 May 1941. She headed out into the waters of the northern Atlantic, south of Greenland. She made her first kill on 6 May, sinking the 166 ton Faroese fishing trawler Emanuel with her deck gun west of the Faroe Islands.
On 10 May she joined the wolf pack West attacking Convoy OB-318 south-east of Cape Farewell. Her first victim was the 4,986 ton British merchant ship Aelybryn, hit by one of the torpedoes fired by the U-boat at 04:42. Badly damaged, but suffering only a single casualty, the ship was towed to Reykjavík by HMS Hollyhock.
The convoy scattered, and at 07:52 U-556 torpedoed and sank the 4,861 ton British merchant ship Empire Caribou. Nine crewmen and two gunners were later picked up by HMS Malcolm, but the master, 31 crewmen, and two gunners were lost.
The U-boat has her third success of the day at 20:37, sinking the 5,086 ton Belgian merchant ship Gand. One crewman was lost and another wounded. The master, 38 crewmen and four gunners were rescued.
Ten days later, on 10 May, the wolf pack attacked Convoy HX-126. Between 14:48 and 15:16 U-556 fired torpedoes at the convoy and sank two British merchant ships, the 4,974 ton Darlington Court and the 5,995 ton Cockaponset, and also the 8,470 ton tanker British Security. Loaded with 11,200 tons of benzine and kerosene the tanker caught fire and burned for three days before sinking. There were no survivors from her crew of 53.
U-556 and Bismarck had been neighbours in the ways at Blohm & Voss and they completed construction at about the same time. (Bismarck was commissioned on 24 August 1940.) In January 1941, as U-556's commissioning ceremonies approached, Wohlfarth wanted a band for the celebration, but could not afford to hire one. Kapitän Ernst Lindemann, commanding officer of Bismarck, loaned him his ship's band.
As thanks, Wohlfarth drew up a humorous Patenschaftsurkunde ("Certificate of Sponsorship") promising that U-556 would protect Bismarck. A drawing shows Wohlfarth as the knight Parzival (his nickname) on the deck of U-556 simultaneously shooting down planes with a pistol and reaching underwater to stop a torpedo with his thumb. A second drawing then shows the submarine towing the battleship to safety.
The text accompanying the drawing reads:
|“||Wir U556 (500 to) erklären hiermit vor Neptun, dem Herrscher über Ozeane, Meere, Seen, Flüsse, Büche, Teiche und Rinnsale daß wir unserem grossen Bruder, dem Schlachtschiff Bismarck (42.000 to) in jeder Lage, zu Wasser, unter Wasser, zu Lande wie in der Luft beistehen wollen.
|“||We, U-556 (500 tons), hereby declare before Neptune, Lord over oceans, seas, lakes, rivers, brooks, ponds, and rivulets, that we will provide any desired assistance to our Big Brother, the battleship Bismarck (42,000 tons), at any place on the water, under water, on land, or in the air.
Around 19:50, Wohlfahrt saw the battlecruiser HMS Renown and the aircraft carrier HMS Ark Royal coming out of the mist at high speed. He recorded in his log, "Enemy bows on, 10 degrees to starboard, without destroyers, without zigzagging," but without any torpedoes, could only submerge and avoid them. Wohlfahrt saw activity on Ark Royal's flight deck, which transpired to be the launching of the second, fatal attack on Bismarck. At 20:39, Wohlfahrt surfaced and transmitted, "Enemy in view, a battleship, an aircraft carrier, course 115, enemy is proceeding at high speed. Position 48° 20′ N, 16° 20′ W." The course of Renown and Ark Royal toward Bismarck coincided almost exactly with his own; he proceeded on the surface at full speed behind them.
Wohlfahrt's War Diary contains these entries for 27 May 1941:
Around 06:30 Wohlfahrt sighted U-74 and transferred the mission of maintaining contact with Bismarck to Kapitänleutnant Eitel-Friedrich Kentrat. He gave Kentrat Bismarck's position based on his observations of the star shells fired during the night, adding: "I have not seen her directly. You assume contact. I have no more fuel." Wohlfahrt then submerged and did not surface again until noon, a time at which radio signals were routinely repeated. That was when he heard for the first time the order radioed to him between 07:00 and 08:00 to pick up Bismarck's War Diary. He replied to the Befehlshaber der U-Boote ("Commander-in-Chief for Submarines") Karl Dönitz, asking that this mission be transferred to Kentrat, who received the radio order, "U-boat Kentrat pick up Bismarck War Diary," but was unable to locate Bismarck. The battleship had sunk before Wohlfahrt had received the first message at noon.
U-556 departed from Lorient on 19 June 1941, and once more headed out into the Atlantic. However, on 27 June, she was sunk south-west of Iceland, in position Coordinates: , by depth charges from the British Flower class corvettes HMS Nasturtium, Celandine and Gladiolus. Five of the crew were killed and 41 survived.