|Ordered:||23 June 1915|
|Builder:||Kaiserliche Werft Danzig|
|Laid down:||20 November 1915|
|Launched:||22 June 1916|
|Commissioned:||7 April 1917|
|Fate:||5 September 1917 - Presumably mined off Terschelling. 43 dead (all hands lost)|
|General characteristics |
|Class and type:||German Type U 87 submarine|
|Height:||9.35 m (30 ft 8 in)|
|Draught:||3.88 m (12 ft 9 in)|
|Propulsion:||2 shafts, 2 × 1.66 m (5 ft 5 in) propellers|
|Test depth:||50 m (160 ft)|
|Complement:||4 officers, 32 enlisted|
|Part of:||Imperial German Navy III Flotilla|
SM U-88[Note 1] was a Type U 87 submarine built for the Imperial German Navy (Kaiserliche Marine) in World War I. U-88 was engaged in the naval warfare and took part in the First Battle of the Atlantic.
U-88 is most notable for sinking and taking with her Kapitänleutnant Walther Schwieger, responsible for sinking the RMS Lusitania when he was commander of U-20. The submarine came to an end on 5 September 1917 when being chased by HMS Stonecrop, hit a British mine and sank in the North Sea north of Terschelling at Coordinates: . Everyone on board U-88 was killed.
German Type U 87 submarines were preceded by the shorter Type U 81 submarines. U-88 had a displacement of 757 tonnes (745 long tons) when at the surface and 998 tonnes (982 long tons) while submerged. She had a total length of 65.80 m (215 ft 11 in), a pressure hull length of 50.07 m (164 ft 3 in), a beam of 6.20 m (20 ft 4 in), a height of 9.35 m (30 ft 8 in), and a draught of 3.88 m (12 ft 9 in). The submarine was powered by two 2,400 metric horsepower (1,800 kW; 2,400 shp) engines for use while surfaced, and two 1,200 metric horsepower (880 kW; 1,200 shp) engines for use while submerged. She had two propeller shafts. She was capable of operating at depths of up to 50 metres (160 ft).
The submarine had a maximum surface speed of 15.6 knots (28.9 km/h; 18.0 mph) and a maximum submerged speed of 8.6 knots (15.9 km/h; 9.9 mph). When submerged, she could operate for 56 nautical miles (104 km; 64 mi) at 5 knots (9.3 km/h; 5.8 mph); when surfaced, she could travel 11,380 nautical miles (21,080 km; 13,100 mi) at 8 knots (15 km/h; 9.2 mph). U-88 was fitted with four 50 centimetres (20 in) torpedo tubes (two at the bow and two at the stern), ten to twelve torpedoes, one 10.5 cm (4.1 in) SK L/45 deck gun, and probably one 8.8 cm (3.5 in) SK L/30 deck gun. She had a complement of thirty-six (thirty-two crew members and four officers).
Summary of raiding history
|23 May 1917||Hector||Norway||1,146||Sunk|
|25 May 1917||Hilary||United Kingdom||6,329||Sunk|
|28 May 1917||Roma||Russian Empire||417||Damaged|
|29 May 1917||Ashleaf||United Kingdom||5,768||Sunk|
|31 May 1917||Jeanne Cordonnier||France||2,194||Sunk|
|31 May 1917||Miyazaki Maru||Japan||7,892||Sunk|
|1 June 1917||Cavina||United Kingdom||6,539||Sunk|
|6 June 1917||Eemdijk||Netherlands||3,048||Sunk|
|7 June 1917||John Bakke||Norway||1,611||Sunk|
|29 June 1917||Escondido||Norway||1,066||Sunk|
|3 July 1917||Iceland||United Kingdom||1,501||Sunk|
|7 July 1917||Coral Leaf||United Kingdom||428||Damaged|
|13 July 1917||Ceres||Denmark||1,166||Sunk|
|16 July 1917||Vesta||Denmark||1,122||Sunk|
- "SM" stands for "Seiner Majestät" (English: His Majesty's) and combined with the U for Unterseeboot would be translated as His Majesty's Submarine.
- Tonnages are in gross register tons
- Helgason, Guðmundur. "WWI U-boats: U 88". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 14 December 2014.
- Gröner 1991, pp. 12-14.
- Helgason, Guðmundur. "WWI U-boat commanders: Walter Schwieger (Pour le Merite)". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 14 December 2014.
- Helgason, Guðmundur. "Ships hit by U 88". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 14 December 2014.
- 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.