|Ordered||9 March 1915|
|Builder||AG Vulkan, Hamburg|
|Launched||30 January 1916|
|Commissioned||26 March 1916|
|Fate||13 December 1917 - Struck a mine off Terschelling. 23 dead, unknown number of survivors.|
|General characteristics |
|Class and type||German Type UE I submarine|
|Height||8.25 m (27 ft 1 in)|
|Draught||4.86 m (15 ft 11 in)|
|Propulsion||2 shafts, 2× 1.38 m (4 ft 6 in) propellers|
|Test depth||50 m (160 ft)|
|Complement||4 officers, 28 enlisted|
SM U-75 was one of the 329 submarines serving in the Imperial German Navy in World War I. U-75 was engaged in naval warfare and took part in the First Battle of the Atlantic. On her first mission, U-75 laid the mine that sank the cruiser HMS Hampshire during her voyage to Russia carrying British Secretary of State for War Lord Kitchener. The cruiser sank at 59°07′N 03°24′W / 59.117°N 3.400°W west of the Orkney Islands with heavy loss of life in a force 9 gale.
German Type UE I submarines were preceded by the longer Type U 66 submarines. U-75 had a displacement of 755 tonnes (743 long tons) when at the surface and 832 tonnes (819 long tons) while submerged. She had a total length of 56.80 m (186 ft 4 in), a pressure hull length of 46.66 m (153 ft 1 in), a beam of 5.90 m (19 ft 4 in), a height of 8.25 m (27 ft 1 in), and a draught of 4.86 m (15 ft 11 in). The submarine was powered by two 900 metric horsepower (660 kW; 890 shp) engines for use while surfaced, and two 800 metric horsepower (590 kW; 790 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 9.9 knots (18.3 km/h; 11.4 mph) and a maximum submerged speed of 7.9 knots (14.6 km/h; 9.1 mph). When submerged, she could operate for 83 nautical miles (154 km; 96 mi) at 4 knots (7.4 km/h; 4.6 mph); when surfaced, she could travel 7,880 nautical miles (14,590 km; 9,070 mi) at 7 knots (13 km/h; 8.1 mph). U-75 was fitted with two 50 centimetres (20 in) torpedo tubes (one at the port bow and one starboard stern), four torpedoes, and one 8.8 cm (3.5 in) SK L/30 deck gun. She had a complement of thirty-two (twenty-eight crew members and four officers).
Summary of raiding history
|5 June 1916||HMS Hampshire||Royal Navy||10,850||Sunk|
|22 June 1916||HMD Laurel Crown||Royal Navy||81||Sunk|
|7 August 1916||HMT John High||Royal Navy||228||Sunk|
|12 August 1916||Kovda||Imperial Russian Navy||1,125||Sunk|
|20 September 1916||Etton||United Kingdom||2,831||Sunk|
|16 November 1916||Fenja||Denmark||433||Sunk|
|22 November 1916||Reserv||Sweden||1,700||Captured as prize|
|23 November 1916||Arthur||Sweden||1,435||Sunk|
|9 April 1917||Ganslei||Russia||1,273||Sunk|
|15 April 1917||HMT Arctic Prince||Royal Navy||194||Damaged|
|10 August 1917||Solglimt||Norway||1,037||Sunk|
|16 August 1917||Palatine||United Kingdom||2,110||Sunk|
|3 September 1917||Treverbyn||United Kingdom||4,163||Sunk|
|22 November 1917||King Idwal||United Kingdom||3,631||Sunk|
|10 December 1917||Aureole||United Kingdom||3,998||Damaged|
|2 September 1918||Ariadne Christine||United Kingdom||3,550||Damaged|
- ^ Merchant ship tonnages are in gross register tons. Military vessels are listed by tons displacement.
- ^ a b Helgason, Guðmundur. "WWI U-boats: U 75". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 18 January 2015.
- ^ a b c d e Gröner 1991, pp. 10–11.
- ^ Helgason, Guðmundur. "WWI U-boat commanders: Curt Beitzen". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 18 January 2015.
- ^ Helgason, Guðmundur. "WWI U-boat commanders: Fritz Schmolling". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 18 January 2015.
- ^ Helgason, Guðmundur. "Ships hit by U 75". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 18 January 2015.
- Gröner, Erich; Jung, Dieter; Maass, Martin (1991). U-boats and Mine Warfare Vessels. German Warships 1815–1945. Vol. 2. Translated by Thomas, Keith; Magowan, Rachel. London: Conway Maritime Press. ISBN 0-85177-593-4.