|Ordered:||25 January 1939|
|Builder:||Flender Werke, Lübeck|
|Laid down:||20 August 1940|
|Launched:||20 September 1941|
|Commissioned:||19 November 1941|
|Fate:||Sunk 12 May 1943 in the Northern Atlantic by a British aircraft and British warships|
|Class and type:||Type VIIC submarine|
|Height:||9.60 m (31 ft 6 in)|
|Draught:||4.74 m (15 ft 7 in)|
|Complement:||4 officers, 40–56 enlisted|
|Victories:||Four ships sunk for a total of 13,815 GRT|
She was a fairly successful boat, sinking over 13,000 tons of Allied shipping in a career lasting just one year and five patrols. She was a member of ten wolfpacks. After training with the 8th U-boat Flotilla, U-89 was assigned to the 9th flotilla on 1 May 1942 for operations.
German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-89 had a displacement of 769 tonnes (757 long tons) when at the surface and 871 tonnes (857 long tons) while submerged. She had a total length of 67.10 m (220 ft 2 in), a pressure hull length of 50.50 m (165 ft 8 in), a beam of 6.20 m (20 ft 4 in), a height of 9.60 m (31 ft 6 in), and a draught of 4.74 m (15 ft 7 in). The submarine was powered by two Germaniawerft F46 four-stroke, six-cylinder supercharged diesel engines producing a total of 2,800 to 3,200 metric horsepower (2,060 to 2,350 kW; 2,760 to 3,160 shp) for use while surfaced, two AEG GU 460/8–27 double-acting electric motors producing a total of 750 metric horsepower (550 kW; 740 shp) for use while submerged. She had two shafts and two 1.23 m (4 ft) propellers. The boat was capable of operating at depths of up to 230 metres (750 ft).
The submarine had a maximum surface speed of 17.7 knots (32.8 km/h; 20.4 mph) and a maximum submerged speed of 7.6 knots (14.1 km/h; 8.7 mph). When submerged, the boat could operate for 80 nautical miles (150 km; 92 mi) at 4 knots (7.4 km/h; 4.6 mph); when surfaced, she could travel 8,500 nautical miles (15,700 km; 9,800 mi) at 10 knots (19 km/h; 12 mph). U-89 was fitted with five 53.3 cm (21 in) torpedo tubes (four fitted at the bow and one at the stern), fourteen torpedoes, one 8.8 cm (3.46 in) SK C/35 naval gun, 220 rounds, and a 2 cm (0.79 in) C/30 anti-aircraft gun. The boat had a complement of between forty-four and sixty.
The boat's second foray started from Brest on 6 June 1942 and finishing there on 21 August. Using her deck gun she sank a Canadian fishing boat, the Lucille M., with 20 incendiary and 15 high explosive rounds off Cape Sable on 25 July
U-89 sank the British ship, the Jeypore on 3 November 1942 and the Daleby also British, both east of Cape Farewell (Greenland), the following day. On the 5th, she was attacked by a B-24 Liberator of No. 120 Squadron RAF. Originally thought to have sunk U-132, U-89 was severely damaged.
Sortie number four began from Brest on 24 January 1943; it was relatively uneventful but terminated in La Pallice on 28 March.
5th patrol and loss
U-89 left France for the last time on 25 April 1943. On 7 May she sank the Greek Laconikis northeast of the Azores but was herself sunk by a combination of a Fairey Swordfish of 811 Naval Air Squadron from the escort carrier HMS Biter, the destroyer HMS Broadway and the frigate HMS Lagan. U-89 was sunk at position Coordinates: .
48 men died with the U-boat; there were no survivors.
U-89 took part in ten wolfpacks, namely.
- Endrass (12–17 June 1942)
- Tümmler (4–7 October 1942)
- Panther (10–20 October 1942)
- Veilchen (20 October – 5 November 1942)
- Pfeil (1–9 February 1943)
- Neptun (20–28 February 1943)
- Wildfang (28 February – 5 March 1943)
- Burggraf (5 March 1943)
- Raubgraf (7–15 March 1943)
- Drossel (29 April – 12 May 1943)
Summary of raiding history
|25 July 1942||Lucille M||Canada||54||Sunk|
|3 November 1942||Teypore||United Kingdom||5,318||Sunk|
|4 November 1942||Daleby||United Kingdom||4,640||Sunk|
|7 May 1943||Laconikos||Greece||3,803||Sunk|
- Busch, Rainer; Röll, Hans-Joachim (1999). German U-boat commanders of World War II : a biographical dictionary. Translated by Brooks, Geoffrey. London, Annapolis, Md: Greenhill Books, Naval Institute Press. ISBN 1-55750-186-6.
- Busch, Rainer; Röll, Hans-Joachim (1999). Deutsche U-Boot-Verluste von September 1939 bis Mai 1945 [German U-boat losses from September 1939 to May 1945]. Der U-Boot-Krieg (in German). IV. Hamburg, Berlin, Bonn: Mittler. ISBN 3-8132-0514-2.
- Edwards, Bernard (1996). Dönitz and the Wolf Packs - The U-boats at War. pp. 210–211. ISBN 0-304-35203-9.
- Gröner, Erich; Jung, Dieter; Maass, Martin (1991). U-boats and Mine Warfare Vessels. German Warships 1815–1945. 2. Translated by Thomas, Keith; Magowan, Rachel. London: Conway Maritime Press. ISBN 0-85177-593-4.
- Kemp, Paul (1999). U-Boats Destroyed - German Submarine Losses in the World Wars. London: Arms & Armour. ISBN 1-85409-515-3.
- Helgason, Guðmundur. "The Type VIIC boat U-89". German U-boats of WWII - uboat.net. Retrieved 26 December 2014.
- Hofmann, Markus. "U 89". Deutsche U-Boote 1935-1945 - u-boot-archiv.de (in German). Retrieved 26 December 2014.