SM UC-7 was a German Type UC I minelayer submarine or U-boat in the German Imperial Navy (German: Kaiserliche Marine) during World War I. The U-boat had been ordered by November 1914 and was launched on 6 July 1915. She was commissioned into the German Imperial Navy on 9 July 1915 as SM UC-7. Mines laid by UC-7 in her 34 patrols were credited with sinking 32 ships.
|Ordered:||by November 1914|
|Builder:||AG Vulcan, Hamburg|
|Launched:||6 July 1915|
|Commissioned:||9 July 1915|
|Status:||Missing since 5 July 1916|
|Class and type:||German Type UC I submarine|
|Beam:||3.15 m (10 ft 4 in)|
|Draft:||3.04 m (10 ft)|
|Test depth:||50 m (160 ft)|
A German Type UC I submarine, UC-7 had a displacement of 168 tonnes (165 long tons) when at the surface and 183 tonnes (180 long tons) while submerged. She had a length overall of 33.99 m (111 ft 6 in), a beam of 3.15 m (10 ft 4 in), and a draught of 3.04 m (10 ft). The submarine was powered by one Daimler-Motoren-Gesellschaft six-cylinder, four-stroke diesel engine producing 90 metric horsepower (66 kW; 89 shp), an electric motor producing 175 metric horsepower (129 kW; 173 shp), and one propeller shaft. She was capable of operating at a depth of 50 metres (160 ft).
The submarine had a maximum surface speed of 6.20 knots (11.48 km/h; 7.13 mph) and a maximum submerged speed of 5.22 knots (9.67 km/h; 6.01 mph). When submerged, she could operate for 50 nautical miles (93 km; 58 mi) at 4 knots (7.4 km/h; 4.6 mph); when surfaced, she could travel 780 nautical miles (1,440 km; 900 mi) at 5 knots (9.3 km/h; 5.8 mph). UC-7 was fitted with six 100 centimetres (39 in) mine tubes, twelve UC 120 mines, and one 8 millimetres (0.31 in) machine gun. She was built by AG Vulcan Stettin and her complement was fourteen crew members.
UC-7 sailed from Zeebrugge on 3 July 1916 to lay mines off the English coast and failed to return. UB-12 sighted a submarine believed to be UC-7 on 5 July, west of the Bligh Bank, 46 km (29 mi) from Ostend. The submarine in question was reported to be on a course that would run it into a minefield, and Verschollen notes that the time and place would be correct if UC-7 were returning to base. The bodies of two crew members were later washed ashore on the coast of Flanders on 19 July. She was claimed that UC-7 was sunk by HMS Salmon on 7 July off Southwold, but this was doubted since the reported position was too far off UC-7's operating area.
Summary of raiding history
|1 September 1915||HMT Malta||138||Sunk|
|1 September 1915||HMT Nadine||150||Sunk|
|1 September 1915||Savona||1,180||Sunk|
|3 September 1915||Churston||2,470||Sunk|
|22 September 1915||Koningin Emma||9,181||Sunk|
|26 September 1915||Vigilant||69||Sunk|
|5 October 1915||Novocastrian||1,151||Sunk|
|6 October 1915||Texelstroom||1,601||Sunk|
|28 November 1915||HMT William Morrison||212||Sunk|
|8 December 1915||Ignis||2,042||Sunk|
|10 December 1915||Ingstad||780||Sunk|
|21 December 1915||Knarsdale||1,641||Sunk|
|31 December 1915||HMT Speeton||205||Sunk|
|6 February 1916||Balgownie||1,061||Sunk|
|8 February 1916||Elswick Manor||3,943||Damaged|
|11 February 1916||HMS Arethusa||3,520||Sunk|
|26 February 1916||Dido||4,769||Sunk|
|27 February 1916||Mecklenburg||2,885||Sunk|
|9 March 1916||Fauvette||2,644||Sunk|
|18 March 1916||HMT Ameer||216||Sunk|
|18 March 1916||Lowlands||1,789||Sunk|
|19 March 1916||HMT Valpa||230||Sunk|
|24 March 1916||Fulmar||1,270||Sunk|
|25 March 1916||HMD Hilary II||78||Sunk|
|26 March 1916||Cerne||2,579||Sunk|
|2 April 1916||Bourbaki||2,208||Damaged|
|2 April 1916||HMT Commandant||207||Sunk|
|9 April 1916||Avon||1,574||Sunk|
|14 April 1916||HMT Alberta||209||Sunk|
|14 April 1916||HMT Orcades||270||Sunk|
|15 April 1916||Tusnastabb||859||Sunk|
|23 April 1916||HMT Lena Melling||274||Sunk|
|10 May 1916||Dolcoath||1,706||Sunk|
|18 June 1916||Seaconnet||2,294||Sunk|
- Helgason, Guðmundur. "WWI U-boats: UC 7". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 20 February 2009.
- Tarrant, p. 173.
- Gröner 1991, pp. 30-31.
- Helgason, Guðmundur. "WWI U-boat commanders: Franz Wäger". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 9 February 2015.
- Helgason, Guðmundur. "WWI U-boat commanders: Georg Haag". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 9 February 2015.
- Messimer, Dwight R. (2002). Verschollen : World War I U-boat losses. Annapolis, Maryland: Naval Institute Press. p. 244. ISBN 978-1-55750-475-3. OCLC 231973419.
- Helgason, Guðmundur. "Ships hit by UC 7". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 8 February 2015.
- Bendert, Harald (2001). Die UC-Boote der Kaiserlichen Marine 1914-1918. Minenkrieg mit U-Booten (in German). Hamburg, Berlin, Bonn: Mittler. ISBN 3-8132-0758-7.
- 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.
- Gardiner, Robert, ed. (1985). Conway's All the World's Fighting Ships, 1906–1921. Annapolis, Maryland: Naval Institute Press. ISBN 978-0-87021-907-8. OCLC 12119866.CS1 maint: extra text: authors list (link)
- Tarrant, V. E. (1989). The U-Boat Offensive: 1914–1945. Annapolis, Maryland: Naval Institute Press. ISBN 978-0-87021-764-7. OCLC 20338385.