SM UC-15

SM UC-15 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 was ordered on 23 November 1914, laid down on 28 January 1915, and was launched on 19 May 1915. She was commissioned into the German Imperial Navy on 28 June 1915 as SM UC-15.[Note 1] Mines laid by UC-15 during her eight patrols are credited with sinking 3 ships. UC-15 disappeared in November 1916.[1]

For other ships with the same name, see German submarine U-15.
German UC I-class submarine
History
German Empire
NameUC-15
Ordered23 November 1914[1]
BuilderAG Weser, Bremen[2]
Yard number230[1]
Laid down28 January 1915[1]
Launched19 May 1915[1]
Commissioned28 June 1915[1]
FateSunk by her own mines shortly after being engaged by the Romanian torpedo boat Smeul
General characteristics [3]
Class and typeGerman Type UC I submarine
Displacement
  • 168 t (165 long tons), surfaced
  • 182 t (179 long tons), submerged
Length
Beam3.15 m (10 ft 4 in)
Draft3.06 m (10 ft 0 in)
Propulsion
Speed
  • 6.49 knots (12.02 km/h; 7.47 mph), surfaced
  • 5.67 knots (10.50 km/h; 6.52 mph), submerged
Range
  • 910 nmi (1,690 km; 1,050 mi) at 5 knots (9.3 km/h; 5.8 mph) surfaced
  • 50 nmi (93 km; 58 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth50 m (160 ft)
Complement14
Armament
  • 6 × 100 cm (39 in) mine tubes
  • 12 × UC 120 mines
  • 1 × 8 mm (0.31 in) machine gun
Service record
Part of:
  • Constantinople Flotilla
  • 28 June 1915 – 30 November 1916
Commanders:
  • Oblt.z.S. Albrecht von Dewitz[4]
  • 28 June 1915 – 20 June 1916
  • Oblt.z.S. Bruno Heller[5]
  • 6 October – 30 November 1916
Operations: 8 patrols
Victories:
  • 2 merchant ships sunk
    (874 GRT)
  • 1 warship sunk
    (350 tons)

Design

A German Type UC I submarine, UC-15 had a displacement of 168 tonnes (165 long tons) when at the surface and 182 tonnes (179 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 3.06 m (10 ft 0 in). The submarine was powered by one Benz six-cylinder, four-stroke diesel engine producing 80 metric horsepower (59 kW; 79 shp), an electric motor producing 175 metric horsepower (129 kW; 173 shp), and one propeller shaft. She was capable of operating at depths of up to 50 metres (160 ft).[3]

The submarine had a maximum surface speed of 6.49 knots (12.02 km/h; 7.47 mph) and a maximum submerged speed of 5.67 knots (10.50 km/h; 6.52 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 910 nautical miles (1,690 km; 1,050 mi) at 5 knots (9.3 km/h; 5.8 mph). UC-15 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 Weser Bremen and her complement was fourteen crew members.[3]

Loss

After completion, UC-15 joined the Constantinople Flotilla and became the Flotilla's only minelaying submarine[6] in November 1915, after her sister ship UC-13 was accidentally grounded and subsequently destroyed by her crew. In November 1916, UC-15 was sent on a minelaying mission off the Romanian port of Sulina and never returned, being sunk by her own mines.[7][8] This was probably caused by an encounter with the Romanian torpedo boat Smeul, whose captain surprised a German submarine near Sulina in November 1916, the latter reportedly never returning to her base at Varna. This could only be UC-15, whose systems most likely malfunctioned after being forced to submerge in the shallow waters, upon encountering the Romanian torpedo boat.[9]

Summary of raiding history
Date Name Nationality Tonnage[Note 2] Fate[10]
25 April 1916 Zhivuchi  Imperial Russian Navy 350 Sunk
25 April 1916 Sv. Georgiy Pobedonsets  Russian Empire 112 Sunk
20 June 1916 Merkury  Russian Empire 762 Sunk

References

Notes
  1. "SM" stands for "Seiner Majestät" (English: His Majesty's) and combined with the U for Unterseeboot would be translated as His Majesty's Submarine.
  2. Merchant ship tonnages are in gross register tons. Military vessels are listed by tons displacement.

Citations
  1. Helgason, Guðmundur. "WWI U-boats: UC 15". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 20 February 2009.
  2. Tarrant, p. 173.
  3. Gröner 1991, pp. 30–31.
  4. Helgason, Guðmundur. "WWI U-boat commanders: Albrecht von Dewitz". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 9 February 2015.
  5. Helgason, Guðmundur. "WWI U-boat commanders: Bruno Heller". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 9 February 2015.
  6. Marian Sârbu, Marina românâ în primul război mondial 1914-1918, p. 68 (in Romanian)
  7. R.H. Gibson, Maurice Prendergast, The German Submarine War 1914-1918, Periscope Publishing, 2002, p. 135
  8. United States Naval Institute Proceedings, Volume 64, United States Naval Institute, 1938, p. 73
  9. Cristian Crăciunoiu, Romanian navy torpedo boats, Modelism Publishing, 2003, p. 24
  10. Helgason, Guðmundur. "Ships hit by UC 15". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 9 February 2015.

Bibliography
  • 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. Vol. 2. Translated by Thomas, Keith; Magowan, Rachel. London: Conway Maritime Press. ISBN 0-85177-593-4.
  • Gardiner, Robert; Gray, Randal, eds. (1985). Conway's All the World's Fighting Ships 1906–1921. Annapolis, Maryland: Naval Institute Press. ISBN 978-0-87021-907-8. OCLC 12119866.
  • Tarrant, V. E. (1989). The U-Boat Offensive: 1914–1945. Annapolis, Maryland: Naval Institute Press. ISBN 978-0-87021-764-7. OCLC 20338385.

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