The UB II type submarine was a class of U-boat

U-boat

U-boat is the anglicized version of the German word U-Boot , itself an abbreviation of Unterseeboot , and refers to military submarines operated by Germany, particularly in World War I and World War II...

 built during World War I

World War I

World War I , which was predominantly called the World War or the Great War from its occurrence until 1939, and the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918...

 by the Kaiserliche Marine

Kaiserliche Marine

The Imperial German Navy was the German Navy created at the time of the formation of the German Empire. It existed between 1871 and 1919, growing out of the small Prussian Navy and Norddeutsche Bundesmarine, which primarily had the mission of coastal defense. Kaiser Wilhelm II greatly expanded...

. They were enlarged from the preceding type UB I

German type UB I submarine

The Type UB I was a class of small coastal submarines built in Germany at the beginning of the First World War. Twenty boats were constructed, most of which went into service with the German Imperial Navy. Boats of this design were also operated by the Austro-Hungarian Navy and the Bulgarian...

 and were more effective vessels. The boats were a single hull design with a 50 metre maximum diving depth and a 30-45 second diving time. In 1915 and 1916, 30 were built at two different shipyards.

List of Type UB II submarines

There were 30 Type UB II submarines commissioned into the Kaiserliche Marine.

• SM UB-18
  SM UB-18
  SM UB-18 was a German Type UB II submarine or U-boat in the German Imperial Navy during World War I. The U-boat was ordered on 30 April 1915 and launched on 21 August 1915...
  
   - Mined December 1917
• SM UB-19
  SM UB-19
  SM UB-19 was a German Type UB II submarine or U-boat in the German Imperial Navy during World War I. The U-boat was ordered on 30 April 1915 and launched on 2 September 1915...
  
   - Sunk by Q ship Penshurst November 1916
• SM UB-20
  SM UB-20
  SM UB-20 was a German Type UB II submarine or U-boat in the German Imperial Navy during World War I. The U-boat was ordered on 30 April 1915 and launched on 26 September 1915...
  
   - Sunk By aircraft July 1917
• SM UB-21
  SM UB-21
  SM UB-21 was a German Type UB II submarine or U-boat in the German Imperial Navy during World War I. The U-boat was ordered on 30 April 1915 and launched on 26 September 1915...
  
   - Foundered on way to breakers 1920
• SM UB-22
  SM UB-22
  SM UB-22 was a German Type UB II submarine or U-boat in the German Imperial Navy during World War I. The U-boat was ordered on 30 April 1915 and launched on 9 October 1915...
  
   - Mined January 1918
• SM UB-23
  SM UB-23
  SM UB-23 was a German Type UB II submarine or U-boat in the German Imperial Navy during World War I. The U-boat was ordered on 30 April 1915 and launched on 9 October 1915...
  
   - Broken up 1921
• SM UB-24
  SM UB-24
  SM UB-24 was a German Type UB II submarine or U-boat in the German Imperial Navy during World War I. The U-boat was ordered on 30 April 1915 and launched on 18 October 1915...
  
   - BU 1921
• SM UB-25
  SM UB-25
  SM UB-25 was a German Type UB II submarine or U-boat in the German Imperial Navy during World War I. The U-boat was ordered on 30 April 1915 and launched on 22 November 1915...
  
   - BU 1922
• SM UB-26
  SM UB-26
  SM UB-26 was a German Type UB II submarine or U-boat in the German Imperial Navy during World War I. The U-boat was ordered on 30 April 1915 and launched on 14 December 1915...
  
   - Sunk and raised by French Navy repaired as Roland Morillot BU 1931
• SM UB-27
  SM UB-27
  SM UB-27 was a German Type UB II submarine or U-boat in the German Imperial Navy during World War I. The U-boat was ordered on 30 April 1915 and launched on 20 December 1915...
  
   - Sunk by July 1917
• SM UB-28
  SM UB-28
  SM UB-28 was a German Type UB II submarine or U-boat in the German Imperial Navy during World War I. The U-boat was ordered on 30 April 1915 and launched on 31 December 1915...
  
   - BU 1919
• SM UB-29
  SM UB-29
  SM UB-29 was a German Type UB II submarine or U-boat in the German Imperial Navy during World War I. The U-boat was ordered on 30 April 1915 and launched on 10 February 1916...
  
   - Sunk by December 1916
• SM UB-30
  SM UB-30
  SM UB-30 was a German Type UB II submarine or U-boat in the German Imperial Navy during World War I. The U-boat was ordered on 22 July 1915 and launched on 16 November 1915...
  
   - Sunk by HM trawler John Gillman August 1918
• SM UB-31
  SM UB-31
  SM UB-31 was a German Type UB II submarine or U-boat in the German Imperial Navy during World War I. The U-boat was ordered on 22 July 1915 and launched on 16 November 1915...
  
   - Sunk by ASW drifter May 1918
• SM UB-32
  SM UB-32
  SM UB-32 was a German Type UB II submarine or U-boat in the German Imperial Navy during World War I. The U-boat was ordered on 22 July 1915 and launched on 4 December 1915...
  
   - Sunk by aircraft September 1917
• SM UB-33 - Mined April 1918
• SM UB-34
  SM UB-34
  SM UB-34 was a German Type UB II submarine or U-boat in the Kaiserliche Marine during World War I. The U-boat was ordered on 22 July 1915 and launched on 28 December 1915...
  
   - BU 1922
• SM UB-35
  SM UB-35
  SM UB-35 was a German Type UB II submarine or U-boat in the German Imperial Navy during World War I. The U-boat was ordered on 22 July 1915 and launched on 28 December 1915...
  
   - Sunk by January 1918
• SM UB-36
  SM UB-36
  SM UB-36 was a German Type UB II submarine or U-boat in the German Imperial Navy during World War I. The U-boat was ordered on 22 July 1915 and launched on 15 January 1916...
  
   - Rammed and sunk by SS Molière May 1917
• SM UB-37
  SM UB-37
  SM UB-37 was a German Type UB II submarine or U-boat in the German Imperial Navy during World War I. The U-boat was ordered on 22 July 1915 and launched on 28 December 1915...
  
   - Sunk by Q ship Penshurst January 1917
• SM UB-38
  SM UB-38
  SM UB-38 was a German Type UB II submarine or U-boat in the German Imperial Navy during World War I. The U-boat was ordered on 22 July 1915 and launched on 1 April 1916...
  
   - Mined February 1918
• SM UB-39
  SM UB-39
  SM UB-39 was a German Type UB II submarine or U-boat in the German Imperial Navy during World War I. The U-boat was ordered on 22 July 1915 and launched on 29 December 1915...
  
   - Sunk by Q ship May 1917
• SM UB-40
  SM UB-40
  SM UB-40 was a German Type UB II submarine or U-boat in the German Imperial Navy during World War I. The U-boat was ordered on 22 July 1915 and launched on 25 April 1916...
  
   - Scuttled October 1918
• SM UB-41
  SM UB-41
  SM UB-41 was a German Type UB II submarine or U-boat in the Kaiserliche Marine in World War I. She was ordered on 22 July 1915 and launched on 6 May 1916...
  
   - BU 1920
• SM UB-42 - BU 1919
• SM UB-43
  SM UB-43
  SM UB-43 was a Type UB II submarine or U-boat for the German Imperial Navy during World War I. UB-43 was sold to the Austro-Hungarian Navy during the war...
  
   - BU 1919
• SM UB-44 - Sunk by British surface ships August 1916
• SM UB-45 - Mined 1916
• SM UB-46 - Mined 1916
• SM UB-47
  SM UB-47
  SM UB-47 was a Type UB II submarine or U-boat for the German Imperial Navy during World War I. UB-47 was sold to the Austro-Hungarian Navy during the war...
  
  - BU 1919