|Career (Nazi Germany)|
|Ordered:||15 December 1937|
|Laid down:||31 March 1939|
|Launched:||12 March 1940|
|Commissioned:||18 April 1940|
|Fate:||Scuttled, 17 March 1941, south-east of Iceland. Three dead and 40 survivors|
|Class & type:||Type VIIB U-boat|
|Displacement:||753 tons surfaced
857 tons submerged
|Length:||Overall 66.6 m
pressure hull 48.8 m
|Beam:||Overall 6.2 m
pressure hull 4.7 m
|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 × BBC electric motors, totalling 750 shp (560 kW) and max rpm: 296.
|Speed:||17.9 knots (33.2 km/h; 20.6 mph) surfaced<br8 knots (15 km/h; 9.2 mph) submerged|
|Range:||16,095 km surfaced
175 km submerged
|Test depth:||230 m (754 ft). Calculated crush depth: 250-295 m (820-967 ft)|
|Complement:||44 to 48 officers and ratings|
|Armament:||5 × 53.3 cm (21 in) torpedo tubes: four bow, one stern
14 × torpedoes or 26 TMA mines
1 × 8.8 cm (3.5 in) deck gun with 220 rounds
1 × C30 20 mm AA
7th U-boat Flotilla
|Identification codes:||M 17 046|
18–25 June 1940
27 June–21 July 1940
25 July–5 August 1940
4–25 September 1940
13 –22 October 1940
30 October–8 November 1940
27 November–12 December 1940
22 February–17 March 1941
|Victories:||35 ships sunk (totaling 198,218 gross register tons (GRT))
three auxiliary warships sunk - 46,440 GRT
five ships damaged - 37,965 GRT
one ship taken as a prize - 2,136 GRT
German submarine U-99 was a Type VIIB U-boat of Nazi Germany's Kriegsmarine during World War II. She was laid down on 31 March 1939 at the Friedrich Krupp Germaniawerft in Kiel as 'werk' 593. She was launched on 12 March 1940 under the command of Korvettenkapitän Otto Kretschmer and was assigned to the 7th U-boat Flotilla based in Kiel and later in St Nazaire.
U-99 was one of the most successful German U-boats in the war, sinking 38 ships for a total tonnage of 244,658 GRT of Allied shipping in eight patrols. She damaged five more ships and took one vessel as a prize.
From April to June 1940, the crew of U-99 were under training, based at Kiel and St. Nazaire.
On 18 June, U-99 departed Kiel for operations in the North Sea west of Norway. She was attacked by an Arado Ar-96 seaplane from the German battleship Scharnhorst, having been mistaken for a British submarine. Two days later, U-99 was attacked by two aircraft; minor damage was inflicted. She returned to Kiel on 25 June.
U-99 departed Wilhelmshaven on 27 June to patrol southwest of Ireland. On 29 June, she was attacked by British aircraft. A crash dive was carried out with the result that the boat hit the seabed, causing some damage which was able to be repaired. During this patrol, U-99 sank six ships. A seventh was captured. An attack on the 5,360 GRT Manistee was called off on 7 July, when the armed merchant ship fired upon the U-boat. On 8 July, over 100 depth charges were dropped by the escorts of Convoy HX 53, but U-99 escaped undamaged. The patrol ended on 21 July.
|5 July 1940||Magog †||Canada||2,053||Sunk|
|7 July 1940||Bissen||Sweden||1,514||Sunk|
|Sea Glory||United Kingdom||1,964||Sunk|
|8 July 1940||Humber Arm ‡||United Kingdom||5,758||Sunk|
|12 July 1940||Ia||Greece||4,861||Sunk|
|18 July 1940||Woodbury||United Kingdom||4,434||Sunk|
† Convoy HX 52, ‡ Convoy HX 53, * sunk by German bombing, 15 July 1940
On 25 July, U-99 departed Lorient for the North Atlantic. Four ships were sunk and three others damaged. On the 31st, the escorts of Convoy OB 191 dropped 20 depth charges on the boat without effect. Later that evening, a flying boat also attacked her, again without causing any damage. The patrol ended on 5 August.
|28 July 1940||Auckland Star||United Kingdom||13,212||Sunk|
|29 July 1940||Clan Menzies||United Kingdom||7,226||Sunk|
|31 July 1940||Jamaica Progress||United Kingdom||5,475||Sunk|
|Jersey City †||United Kingdom||6,322||Sunk|
|2 August 1940||Alexia †, ‡||United Kingdom||8,016||Damaged|
|Lucerna †, ‡||United Kingdom||6,556||Damaged|
|Strinda †, ‡||Norway||10,973||Damaged|
† Convoy OB 191, ‡ Damaged
|11 September 1940||Albionic||United Kingdom||2,468||Sunk|
|15 September 1940||Kenordoc †||Canada||1,780||Sunk|
|16 September 1940||Lotos †||Norway||1,327||Sunk|
|17 September 1940||Crown Arun ‡||United Kingdom||2,372||Sunk|
|21 September 1940||Baron Blythswood *||United Kingdom||3,668||Sunk|
|Elmbank *||United Kingdom||5,156||Sunk|
† Convoy SC 3, ‡ Convoy HX 71, * Convoy HX 72
|18 October 1940||Empire Miniver||United Kingdom||6,055||Sunk|
|19 October 1940||Clintonia †||United Kingdom||3,106||Damaged|
|Empire Brigade||United Kingdom||5,154||Sunk|
U-99 departed Lorient for the North West Approaches on 30 October 1940; four ships were sunk. The patrol ended on 8 November.
|3 November 1940||Casanare||United Kingdom||5,376||Sunk|
|HMS Laurentic (F51)||Royal Navy||18,724||Sunk|
|4 November 1940||Patroclus||United Kingdom||11,314||Sunk|
|5 November 1940||Scottish Maiden †||United Kingdom||6,993||Sunk|
† Convoy HX 83
On 27 November, U-99 departed Lorient for the North Atlantic. Four ships were sunk. The patrol ended on 12 December.
|2 December 1940||HMS Forfar (F30)||Royal Navy||16,402||Sunk|
|3 December 1940||Conch †||United Kingdom||8,376||Sunk|
|7 December 1940||Farmsum ‡||Netherlands||5,237||Sunk|
† Convoy HX 90, ‡ Convoy OB 252
U-99 departed Lorient on 22 February 1941 to patrol in the North Atlantic; eight ships were sunk. U-99 was attacked herself, with severe damage inflicted. Kretschmer surrendered and scuttled the submarine with the loss of three lives.
|7 March 1941||Athelbeach †||United Kingdom||6,568||Sunk|
|Terje Viken||United Kingdom||20,638||Sunk|
|16 March 1941||Beduin ‡||Norway||8,136||Sunk|
|Franche-Comté ‡||United Kingdom||9,314||Damaged|
|J. B. White||Canada||7,375||Sunk|
|Venetia †||United Kingdom||5,728||Sunk|
On 17 March 1941, U-99 had just fired the last of her torpedoes and sunk Korshamn when the Watch Officer spotted a destroyer, south-east of Iceland in approximate position . He immediately ordered a dive, contrary to Kretschmer's standing orders, but once the boat was under it was quickly fixed on ASDIC and attacked by HMS Walker and HMS Vanoc. U-99 was driven deep by the attack but was nonetheless severely damaged. Kretschmer had no choice but to surface; immediately a barrage of fire greeted the boat. Kretschmer sent a message to Donald Macintyre, Walker's captain, "CAPTAIN TO CAPTAIN. I AM SUNKING [sic] PLEASE RESCUE MY CREW." He then ordered that the boat should be scuttled. 40 crew, including Kretschmer, were rescued to become POWs, while three crewmen lost their lives. Macintyre took Kretschmer's binoculars as a souvenir.
U-99 operated with the following Wolfpacks during her career:
- Wolfpack 1 (20 September 1940 - 22 September 1940)
- Wolfpack 2 (17 October 1940 - 19 October 1940)
- Kemp, Paul: U-Boats Destroyed, German Submarine Losses in the World Wars. 1997. p. 69. Arms and Armour. ISBN 1-85409-515-3
- "U-99". Ubootwaffe. Retrieved 17 November 2009.
- "U-99". Uboat. Retrieved 17 November 2009.
- "Merisaar". Uboat. Retrieved 17 November 2009.
- "HMS Manistee (F104)". Uboat. Retrieved 17 November 2009.
- Fairbank White, David - Bitter Ocean - The dramatic story of the Battle of the Atlantic 1939-1945, 2006, Headline Publishing Group ISBN 9 780 7553 1089 0, p.79
- Fairbank White, p. 81
- Fairbank White, pp. 82-83
- u-boot-archiv.de webpage for U-99
- uboataces.com webpage with insignia for U-99
- uboatarchive.net U-99 Interrogation of Survivors, Naval Intelligence Division, April 1941