SM UC-12

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History
War Ensign of Germany 1903-1918.svg German Empire
NameUC-12
Ordered23 November 1914 [1]
Builder AG Weser, Bremen [2]
Yard number226 [1]
Laid down27 January 1915 [1]
Launched29 April 1915 [1]
Commissioned2 May 1915 [1]
FateSunk by own mine, 16 March 1916 [1]
General characteristics [3]
Class and type 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:
  • Pola Flotilla
  • 27 June 1915 – 16 March 1916
Commanders:
  • Oblt.z.S. Cäsar Bauer [4]
  • 2 May – 26 June 1915
  • Kptlt. Karl Palis [5]
  • 27 June 1915 – 1 January 1916
  • Oblt.z.S. Eberhard Fröhner [6]
  • 2 January – 16 March 1916
Operations: 7 patrols
Victories:
  • 1 merchant ship sunk
    (2,382  GRT)
  • 5 auxiliary warships sunk
    (907  GRT)

SM UC-12 was a German Type UC I minelayer submarine or U-boat in the German Imperial Navy (German : Kaiserliche Marine) during World War I.

Contents

Design

A Type UC I submarine, UC-1 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). 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 a depth of 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-1 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]

Construction

The U-boat was ordered on 23 November 1914, laid down on 27 January 1915, and was launched on 29 April 1915. She was commissioned into the German Imperial Navy on 2 May 1915 as SM UC-12. [Note 1]

Service history

UC-12 served with the Pola Flotilla based at Cattaro in the Adriatic. She operated as a minelayer, and undertook seven patrols in this role. Mines laid by UC-12 were credited with sinking six ships. One of these, the Italian Marechiaro sunk on 21 February 1916, was listed as a hospital ship and sank with over 200 casualties. [7] Since Germany was not at war with Italy at this stage, though Austria was, UC 12, like other German U-boats in the Mediterranean, operated under the Austro-Hungarian flag.

Fate

On 16 March 1916 UC-12 was sunk by the detonation of one of her own mines while laying a mine fields off Taranto harbour. Italian divers inspected the wreck and established its identity. The knowledge that Germany, technically their ally, was assiduously mining their naval bases was a contributing factor in Italy’s decision in August 1916 to declare war on Germany. [8] The submarine was raised by Italy and commissioned as X-1 in the Italian Royal Navy. [1]

Summary of raiding history

DateNameNationalityTonnage [Note 2] Fate [9]
16 February 1916 Memphis Flag of France.svg  France 2,382Sunk
21 February 1916 Marechiaro Flag of Italy (1861-1946) crowned.svg  Regia Marina 412Sunk
23 February 1916 Monsone Flag of Italy (1861-1946) crowned.svg  Regia Marina 249Sunk
26 February 1916 HMD Lily Reaich Naval Ensign of the United Kingdom.svg  Royal Navy 88Sunk
3 March 1916 HMD Boy Harold Naval Ensign of the United Kingdom.svg  Royal Navy 74Sunk
8 March 1916 HMD Enterprise II Naval Ensign of the United Kingdom.svg  Royal Navy 84Sunk

Related Research Articles

SM <i>UC-1</i>

SM UC-1 was a German Type UC I minelayer submarine or U-boat in the German Imperial Navy during World War I. The U-boat had been ordered by November 1914 and was launched on 26 April 1915. She was commissioned into the German Imperial Navy on 5 July 1915 as SM UC-1. Mines laid by UC-1 in her 80 patrols were credited with sinking 41 ships. UC-1 disappeared after 18 July 1917. UC-1 was sunk on 24 July 1917 by F2B Felixstowe flying boat. Standard practice was to fly along the U boat and drop 2 250lb bombs astride it, hoping to cause leaks and give time for a destroyer to collect the submariners and sink it. On this occasion, by fluke, one bomb went through the conning tower and blew the base out of UC1. MFG Mill was awarded the DFC for this but he refused to wear it because of the total loss of life <london Gazette> <MFG Mill Diaries>

SM UC-3 was a German Type UC I minelayer submarine or U-boat in the German Imperial Navy during World War I. The U-boat had been ordered by November 1914 and was launched on 28 May 1915. She was commissioned into the German Imperial Navy on 1 June 1915 as UC-3. Mines laid by UC-3 in her 29 patrols were credited with sinking 22 ships and damaging 2 others. UC-3 was caught in a net, detected by hydrophone, and sunk on 23 April 1916 or mined and sunk on 27 May 1916.

SM UC-4 was a German Type UC I minelayer submarine or U-boat in the German Imperial Navy during World War I. The U-boat had been ordered by November 1914 and was launched on 6 June 1915. She was commissioned into the German Imperial Navy on 10 June 1915 as SM UC-4. Mines laid by UC-4 in her 73 patrols were credited with sinking 36 ships. UC-4 was scuttled off the coast of Flanders during the German evacuation on 5 October 1918.

SM UC-6 was a German Type UC I minelayer submarine or U-boat in the German Imperial Navy during World War I. The U-boat had been ordered by November 1914 and was launched on 20 June 1915. She was commissioned into the German Imperial Navy on 24 June 1915 as SM UC-6. Mines laid by UC-6 in her 89 patrols were credited with sinking 55 ships.

SM UC-11 was a German Type UC I minelayer submarine or U-boat in the German Imperial Navy during World War I. The U-boat was ordered on 23 November 1914, laid down on 26 January 1915, and was launched on 11 April 1915. She was commissioned into the German Imperial Navy on 23 April 1915 as SM UC-11. Mines laid by UC-11 in her 83 patrols were credited with sinking 27 ships. UC-11 was mined and sunk on 26 June 1918. A crew member was Rudolf Finkler from Oberlinxweiler, Kreis St. Wendel, Germany. According to his death record the boat went down in the North Sea near Harwich, abt. 2.5 nautical miles north east of Funk Feuerschiff on position 51°55′N1°41′E.

SM UC-14 was a German Type UC I minelayer submarine or U-boat in the German Imperial Navy during World War I. The U-boat was ordered on 23 November 1914, laid down on 28 January 1915, and was launched on 13 May 1915. She was commissioned into the German Imperial Navy on 5 June 1915 as SM UC-14. Mines laid by UC-14 in her 38 patrols were credited with sinking 16 ships, one of which was the Italian pre-dreadnought battleship Regina Margherita, which at 13,427 tonnes displacement was one of the largest ships sunk by U-boats during the war. UC-14 was mined and sunk on 3 October 1917.

SM UC-17 was a German Type UC II minelaying submarine or U-boat in the Imperial German Navy in World War I. She was ordered on 29 August 1915 and launched on 29 February 1916. She was commissioned into the Imperial German Navy on 21 July 1916 as SM UC-17.

SM UC-20 was a German Type UC II minelaying submarine or U-boat in the German Imperial Navy during World War I. The U-boat was ordered on 29 August 1915 and was launched on 1 April 1916. She was commissioned into the German Imperial Navy on 7 September 1916 as SM UC-20. In 13 patrols UC-20 was credited with sinking 21 ships, either by torpedo or by mines laid. UC-20 was surrendered on 16 January 1919 and broken up at Preston in 1919–20.

SM UC-22 was a German Type UC II minelaying submarine or U-boat in the German Imperial Navy during World War I. The U-boat was ordered on 29 August 1915 and was launched on 1 February 1916. She was commissioned into the German Imperial Navy on 30 June 1916 as SM UC-22. In 15 patrols UC-22 was credited with sinking 23 ships, either by torpedo or by mines laid. UC-22 was surrendered to France on 3 February 1919 and was broken up at Landerneau in July 1921.

SM UC-23 was a German Type UC II minelaying submarine or U-boat in the German Imperial Navy during World War I. The U-boat was ordered on 29 August 1915 and was launched on 29 February 1916. She was commissioned into the German Imperial Navy on 17 July 1916 as SM UC-23. In 17 patrols UC-23 was credited with sinking 46 ships, either by torpedo or by mines laid. UC-23 was surrendered at Sevastopol on 25 November 1918 and broken up at Bizerta in August 1921.

SM UC-25 was a German Type UC II minelaying submarine or U-boat in the German Imperial Navy during World War I. The U-boat was ordered on 29 August 1915 and was launched on 10 June 1916. She was commissioned into the German Imperial Navy on 28 June 1916 as SM UC-25. In 13 patrols UC-25 was credited with sinking 21 ships, either by torpedo or by mines laid. From March to September 1918, she was commanded by Karl Dönitz, later grand admiral in charge of all U-boats in World War II. UC-25 was scuttled at Pola on 28 October 1918 on the surrender of Austria-Hungary.

SM UC-37 was a German Type UC II minelaying submarine or U-boat in the German Imperial Navy during World War I. The U-boat was ordered on 20 November 1915 and was launched on 5 June 1916. She was commissioned into the German Imperial Navy on 17 October 1916 as SM UC-37. In 13 patrols UC-37 was credited with sinking 66 ships, either by torpedo or by mines laid. UC-37 was surrendered at Sevastopol on 25 November 1918 and broken up at Bizerta in August 1921.

SM UC-47 was a German Type UC II minelaying submarine or U-boat in the German Imperial Navy during World War I. The U-boat was ordered on 20 November 1915, laid down on 1 February 1916, and was launched on 30 August 1916. She was commissioned into the German Imperial Navy on 13 October 1916 as SM UC-47. In 13 patrols UC-47 was credited with sinking 58 ships, either by torpedo or by mines laid. UC-47 was rammed and depth charged by British patrol boat P-57, under the command of H.C. Birnie, off Flamborough Head on 18 November 1917. UC-47 went down with all hands.

SM UC-52 was a German Type UC II minelaying submarine or U-boat in the German Imperial Navy during World War I. The U-boat was ordered on 12 January 1916 and was launched on 23 January 1917. She was commissioned into the German Imperial Navy on 15 March 1917 as SM UC-52. In seven patrols UC-52 was credited with sinking 18 ships, either by torpedo or by mines laid. She notably sank the Italian troopship Verona, killing 880 soldiers. UC-52 was surrendered on 16 January 1919 and broken up at Morecambe.

SM <i>UC-57</i>

SM UC-57 was a German Type UC II minelaying submarine or U-boat in the German Imperial Navy during World War I. The U-boat was ordered on 12 January 1916, laid down on 14 March 1916, and was launched on 7 September 1916. She was commissioned into the German Imperial Navy on 22 January 1917 as SM UC-57. In seven patrols UC-57 was credited with sinking 5 ships, either by torpedo or by mines laid.

SM UC-64 was a German Type UC II minelaying submarine or U-boat in the German Imperial Navy during World War I. The U-boat was ordered on 12 January 1916, laid down on 3 April 1916, and was launched on 23 January 1917. She was commissioned into the German Imperial Navy on 22 February 1917 as SM UC-64. In 15 patrols UC-64 was credited with sinking 26 ships, either by torpedo or by mines laid. UC-64 was mined and sunk in the Dover Strait on 20 June 1918.

SM UC-65 was a German Type UC II minelaying submarine or U-boat in the German Imperial Navy during World War I. The U-boat was ordered on 12 January 1916 and was launched on 8 July 1916. She was commissioned into the German Imperial Navy on 7 November 1916 as SM UC-65. In eleven patrols UC-65 was credited with sinking 106 ships, either by torpedo or by mines laid. UC-65 was torpedoed and sunk by HMS C15 on 3 November 1917.

SM UC-71 was a German Type UC II minelaying submarine or U-boat in the German Imperial Navy during World War I. The U-boat was ordered on 12 January 1916 and was launched on 12 August 1916. She was commissioned into the German Imperial Navy on 28 November 1916 as SM UC-71. In 19 patrols UC-71 was credited with sinking 63 ships, either by torpedo or by mines laid. UC-71 sank on 20 February 1919 in the North Sea while on her way to be surrendered. Discovery a century later of her wreck with all hatches open suggested she had been deliberately scuttled by her own crew.

SM UC-73 was a German Type UC II minelaying submarine or U-boat in the German Imperial Navy during World War I. The U-boat was ordered on 12 January 1916 and was launched on 26 August 1916. She was commissioned into the German Imperial Navy on 24 December 1916 as SM UC-73. In ten patrols UC-73 was credited with sinking 16 ships, either by torpedo or by mines laid. UC-73 was surrendered on 6 January 1919 and broken up at Brighton Ferry in 1919 – 20.

SM UC-79 was a German Type UC II minelaying submarine or U-boat in the German Imperial Navy during World War I.

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. 1 2 3 4 5 6 7 Helgason, Guðmundur. "WWI U-boats: UC 12". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 20 February 2009.
  2. ↑ Tarrant, p. 173.
  3. 1 2 3 Gröner 1991, pp. 30–31.
  4. ↑ Helgason, Guðmundur. "WWI U-boat commanders: Cäsar Bauer". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 9 February 2015.
  5. ↑ Helgason, Guðmundur. "WWI U-boat commanders: Karl Palis". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 9 February 2015.
  6. ↑ Helgason, Guðmundur. "WWI U-boat commanders: Eberhard Fröhner". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 9 February 2015.
  7. ↑ Helgason, Guðmundur. "Ships hit during WWI: Marechiaro". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net.
  8. ↑ Kemp p 17
  9. ↑ Helgason, Guðmundur. "Ships hit by UC 12". 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.
  • Kemp, Paul (1997). U-Boats Destroyed, German submarine losses in the World Wars. Arms and Armour. ISBN   1-85409-515-3.
  • 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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