SM UB-12

For other ships with the same name, see German submarine U-12.

History
German Empire
NameUB-12
Ordered15 October 1914[1]
BuilderAG Weser, Bremen[2]
Yard number221[1]
Laid down7 November 1914[1]
Launched2 March 1915[1]
Commissioned29 March 1915[1]
FateDisappeared after 19 August 1918[1]
General characteristics [3]
Class and typeType UB I submarine
Displacement
  • 127 t (125 long tons) surfaced
  • 141 t (139 long tons) submerged
Length27.88 m (91 ft 6 in) (o/a)
Beam3.15 m (10 ft 4 in)
Draft3.03 m (9 ft 11 in)
Propulsion
Speed
  • 7.45 knots (13.80 km/h; 8.57 mph) surfaced
  • 6.24 knots (11.56 km/h; 7.18 mph) submerged
Range
  • 1,500 nmi (2,800 km; 1,700 mi) at 5 knots (9.3 km/h; 5.8 mph) surfaced
  • 45 nmi (83 km; 52 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth50 metres (160 ft)
Complement14
Armament
Notes33-second diving time
Service record
Part of:
  • Flandern Flotilla
  • 18 April 1915 – 19 August 1918
Commanders:
  • Oblt.z.S. Hans Nieland[4]
  • 29 March – 20 November 1915
  • Oblt.z.S. Wilhelm Kiel[5]
  • 21 November 1915 – 25 June 1916
  • Oblt.z.S. Georg Gerth[6]
  • 26 June – 4 November 1916
  • Oblt.z.S. Friedrich Moecke[7]
  • 5 November 1916 – 19 January 1917
  • Oblt.z.S. Ernst Steindorff[8]
  • 20 January – 7 August 1917
  • Oblt.z.S. Günther Wigankow[9]
  • 8 August – 23 September 1917
  • Oblt.z.S. Wilhelm Braun[10]
  • 24 September 1917 – 9 March 1918
  • Oblt.z.S. Freiherr Nikolaus von Lyncker[11]
  • 10 March – 9 May 1918
  • Oblt.z.S. Ernst Schöller[12]
  • 10 May – 19 August 1918
Operations: 98 patrols
Victories:
  • 17 merchant ships sunk
    (8,970 GRT)
  • 1 warship sunk
    (995 tons)
  • 5 auxiliary warships sunk
    (1,293 GRT)
  • 1 merchant ship taken as prize
    (654 GRT)

SM UB-12 was a German Type UB I submarine or U-boat in the German Imperial Navy (German: Kaiserliche Marine) during World War I. The submarine disappeared in August 1918.

UB-12 was ordered in October 1914 and was laid down at the AG Weser shipyard in Bremen in November. UB-12 was a little under 28 metres (92 ft) in length and displaced between 127 and 141 tonnes (125 and 139 long tons), depending on whether surfaced or submerged. She carried two torpedoes for her two bow torpedo tubes and was also armed with a deck-mounted machine gun. UB-12 was broken into sections and shipped by rail to Antwerp for reassembly. She was launched and commissioned as SM UB-12 in March 1915.[Note 1]

UB-12 spent her entire career in the Flanders Flotilla and sank 22 ships, about half of them British fishing vessels. The U-boat was also responsible for sinking the British destroyer HMS Laforey in 1917. By early 1917, UB-12 had been converted into a minelayer with the replacement of her torpedo tubes with four mine chutes. UB-12 disappeared after 19 August 1918.

  1. ^ a b c d e f Helgason, Guðmundur. "WWI U-boats: UB 12". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 19 February 2009.
  2. ^ Tarrant, p. 172.
  3. ^ Gröner 1991, pp. 22–23.
  4. ^ Helgason, Guðmundur. "WWI U-boat commanders: Hans Nieland". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 January 2015.
  5. ^ Helgason, Guðmundur. "WWI U-boat commanders: Wilhelm Kiel". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 January 2015.
  6. ^ Helgason, Guðmundur. "WWI U-boat commanders: Georg Gerth". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 January 2015.
  7. ^ Helgason, Guðmundur. "WWI U-boat commanders: Friedrich Moecke". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 January 2015.
  8. ^ Helgason, Guðmundur. "WWI U-boat commanders: Ernst Steindorff (Royal House Order of Hohenzollern)". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 January 2015.
  9. ^ Helgason, Guðmundur. "WWI U-boat commanders: Günther Wigankow". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 January 2015.
  10. ^ Helgason, Guðmundur. "WWI U-boat commanders: Wilhelm Braun". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 January 2015.
  11. ^ Helgason, Guðmundur. "WWI U-boat commanders: Freiherr Nikolaus von Lyncker". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 January 2015.
  12. ^ Helgason, Guðmundur. "WWI U-boat commanders: Ernst Schöller". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 January 2015.


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