German submarine U-559

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German submarine U-559 was a Type VIIC U-boat built for Nazi Germany's Kriegsmarine for service during World War II.

Laid down on 1 February 1940 at the Blohm & Voss shipyards in Hamburg as "Baunummer 535" ("Yard number 535"), she was launched on 8 January 1941 and commissioned on 27 February under Kapitänleutnant Hans Heidtmann.

She began her service career with the 1st U-boat Flotilla, undergoing training before being declared operational on 1 June 1941. She moved to the 29th U-boat Flotilla on 15 April 1942. She sank five ships but is perhaps best remembered for an incident during her sinking in the Mediterranean Sea in 1942, in which British sailors seized cryptographic material from her. This material was extremely valuable in breaking the U-boat Enigma machine cipher.

Design

German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-559 had a displacement of Template:Convert when at the surface and Template:Convert while submerged.Template:Sfn She had a total length of Template:Convert, a pressure hull length of Template:Convert, a beam of Template:Convert, a height of Template:Convert, and a draught of Template:Convert. The submarine was powered by two Germaniawerft F46 four-stroke, six-cylinder supercharged diesel engines producing a total of Template:Convert for use while surfaced, two Brown, Boveri & Cie GG UB 720/8 double-acting electric motors producing a total of Template:Convert for use while submerged. She had two shafts and two Template:Convert propellers. The boat was capable of operating at depths of up to Template:Convert.Template:Sfn

The submarine had a maximum surface speed of Template:Convert and a maximum submerged speed of Template:Convert.Template:Sfn When submerged, the boat could operate for Template:Convert at Template:Convert; when surfaced, she could travel Template:Convert at Template:Convert. U-559 was fitted with five Template:Convert torpedo tubes (four fitted at the bow and one at the stern), fourteen torpedoes, one [[8.8 cm SK C/35 naval gun|Template:Convert SK C/35 naval gun]], 220 rounds, and a [[2 cm FlaK 30|Template:Convert C/30]] anti-aircraft gun. The boat had a complement of between forty-four and sixty.Template:Sfn

Service history

U-559 was originally intended to serve as an Atlantic U-boat during the Battle of the Atlantic against Allied convoys in the Western Approaches.

First and second patrols

Her first patrol took her from Kiel on 4 June 1941, across the North Sea and through the gap between Greenland and Iceland. She arrived at St. Nazaire in occupied France on 5 July.

Her second sortie met with success when she torpedoed and sank the Alva about Template:Convert west of Ushant. She returned to her French base on 22 August 1941.

Third patrol

For her third patrol, beginning on 20 September, she was assigned to the 'Goeben' group, which were the first U-boats to enter the Mediterranean in World War II through the heavily defended Strait of Gibraltar. She reached Salamis in Greece, after having first investigated the Libyan/Egyptian border.

Fourth patrol

On her fourth patrol, she torpedoed and sank the Australian sloop Template:HMAS off the Libyan coast; although most survivors were picked up by other ships, three men managed to reach dry land where they were rescued by advancing British troops.<ref>Paterson, Lawrence - U-Boats in the Mediterranean 1941-1944, 2007, Chatham Publishing, Template:ISBN, p. 43.</ref>

Fifth, sixth and seventh patrols

On her fifth patrol, which began on 8 December 1941, the boat sank Template:SS on the 23rd. Shuntien carried 850 – 1,100 German and Italian prisoners of war. Between 800 and 1,000 people were killed, including at least 700 PoWs.<ref>Template:Cite web</ref>

Her sixth and seventh patrols were both from Salamis to the area of the Libyan coast. They were without success.

Eighth and ninth patrols

Having moved to Pula in Croatia in March 1942, she then sortied on 18 May, and sank the tanker Athene and damaged the oiler Brambleleaf in a convoy attack on 10 June.

Her ninth patrol, however, was without success.

Wolfpacks

U-559 took part in one wolfpack, Goeben (20 September – 5 October 1941).

Fate

It was her own demise that made her most famous. At about 05:00 on 30 October 1942, U-559 was spotted by a Royal Air Force Sunderland, W from 201 Squadron in position Template:Coord, 70 miles north of the Nile Delta. The destroyer Template:HMS was alerted by radio and steamed to intercept her, while the destroyers Template:HMS, Template:HMS, Template:HMS and Template:HMS sailed from Port Said, Egypt. At about 12:34 a Wellesley patrol aircraft, F from 47 Squadron, spotted the periscope of the submerged U-559 and attacked with depth charges.Template:Sfn<ref name="uboatnet"/><ref>Template:Harvnb</ref>

The destroyer group hunted for the U-boat for 16 hours, constantly depth charging. After dark, U-559, with a cracked pressure hull, unable to maintain level trim and four of her crew dead from explosions and flooding, was forced to the surface. She was close to Petard, which immediately opened fire with her Oerlikon 20 mm cannon.Template:Sfn<ref>Template:Cite book</ref>

The German crew hurriedly scrambled overboard without destroying their codebooks or Enigma machine and, crucially, having failed to open all the sea-water vents to scuttle the U-boat properly. Three Royal Navy sailors, Lieutenant Anthony Fasson, Able Seaman Colin Grazier and NAAFI canteen assistant Tommy Brown, then boarded the abandoned submarine. There are differing reports as to how the three British men boarded the U-boat. Some accounts (such as that of Kahn) say that they "swam naked" to U-559, which was sinking, but slowly.<ref>Kahn, David Seizing The Enigma: The Race to Break The German U-boat Codes, 1939-1943. 1991. p. 224. Souvenir Press Template:ISBN</ref> Sebag-Montefiore states that they either leapt from Petard or, in Brown's case, from a whaler. They retrieved the U-boat's Enigma key setting sheets with all current settings for the U-boat Enigma network. Two German crew members, rescued from the sea, watched this material being loaded into Petard's whaler but were dissuaded from interfering by an armed guard. Grazier and Fasson were inside the U-boat, attempting to get out, when it foundered; both drowned.<ref>Template:Cite book</ref>

Aftermath

Grazier and Fasson were awarded the George Cross posthumously, Brown was awarded the George Medal. The Victoria Cross was considered but not awarded, for the ostensible reason that their bravery was not "in the face of the enemy".<ref>Kahn, p. 226.</ref> Another consideration may have been that a Victoria Cross would have drawn unwanted attention to the U-boat's capture from German intelligence. It was also discovered that Brown had lied about his age in order to enlist, and was only 16 years old, making him one of the youngest recipients of the George Medal. He was discharged and returned home to North Shields, only to die two years later attempting to rescue his younger sister from a house fire.<ref>Template:Cite book</ref>

The code-book material they retrieved was immensely valuable to the code-breakers at Bletchley Park, who had been unable to read the 4-rotor U-boat Enigma for ten months since its introduction by the German Kriegsmarine at the beginning of 1942. This captured material allowed them to read the cyphers for several weeks, and to break U-boat Enigma thereafter right through to the end of the war.

The recovery was one of several such events (e.g., the earlier capture of Template:GS), that inspired the fictional account of the submarine capture in the 2000 film U-571.

Summary of raiding history

Date	Ship Name	Nationality	Tonnage<ref group=Note name=tonnage>Merchant ship tonnages are in gross register tons. Military vessels are listed by tons displacement.</ref>	Fate<ref>Template:Cite web</ref>
19 August 1941	Alva	Template:Flag	1,584	Sunk
27 November 1941	Template:HMAS	Template:Navy	1,060	Sunk
23 December 1941	Template:SS	Template:Flag	3,059	Sunk
26 December 1941	Warszawa	Template:Flag	2,487	Sunk
10 June 1942	Athene	Template:Flag	4,681	Sunk
10 June 1942	Brambleleaf	Template:Flag	5,917	Total loss
12 October 1942	Bringhi	Template:Flag	200	Total loss

See also

• Mediterranean U-boat Campaign (World War II)
• German submarine U-505
• German submarine U-110

Bibliography

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• Kahn, David; Seizing the Enigma: The Race to Break the German U-Boats Codes, 1939-1943, (1991)
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External links

• Template:Cite web
• Memorial page for Fasson and Grazier {reference only}