SM U-65 was one of the 329 submarine

Submarine

A submarine is a watercraft capable of independent operation below the surface of the water. It differs from a submersible, which has more limited underwater capability...

s serving in the Imperial German Navy (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...

) in 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...

.
U-65 was engaged in the naval warfare

Naval warfare of World War I

Naval warfare in World War I was mainly characterized by the efforts of the Allied Powers, with their larger fleets and surrounding position, to blockade the Central Powers by sea, and the efforts of the Central Powers to break that blockade or to establish an effective blockade of the United...

 and took part in the First Battle of the Atlantic.

Operations

U-65. Kaptlt. von Fiachal. On completion at Kiel did trials at Kiel School about May and June 1916, afterwards proceeding to the North Sea to join 4th Flotilla.

• ? 11–14 July 1916. North Sea patrol.

• 16–24 July 1916. North Sea patrol.

• 17–21 August 1916. North Sea patrol, attacked minesweeper
  Minesweeper (ship)
  A minesweeper is a small naval warship designed to counter the threat posed by naval mines. Minesweepers generally detect then neutralize mines in advance of other naval operations.-History:...
  
   Haldon
  Racecourse class minesweeper
  The Racecourse class minesweepers were 32 ships delivered to the Royal Navy during the First World War. They were built to two related designs as paddlewheel coastal minesweeping sloops under the Emergency War Programme. The vessels were reasonable sea-boats, but lost speed badly in a seaway when...
  
   20 August.

• 3–4 September 1916. North Sea patrol. Returned with defects.

• 26 October - 19 November 1916. To Mediterranean, northabout. Engaged by armed yacht Valiant II in 35°55'N., 3°57'W. Sank nothing. On arrival at Cattaro joined the Pola-Cattaro Flotilla.

• 28 November – 7 December 1916. Left Cattaro and on 1 December probably sank a steamer. On 4 December sank British SS Caledonia in 35°40'N., 17°4'E. The submarine was badly rammed by Caledonia and appears to have returned home immediately on the surface.

• 29 March - 19/20 April 1917. In western Mediterranean sank 4 S.S., 5 sailing vessels (13,000 tons).

• 14 May - 9 June 1917. Possible cruise of U-65. After leaving Cattaro submarine damaged cruiser
  Cruiser
  A cruiser is a type of warship. The term has been in use for several hundreds of years, and has had different meanings throughout this period...
  
   Dartmouth
  HMS Dartmouth (1911)
  HMS Dartmouth was a Town-class light cruiser of the Royal Navy launched on 14 December 1910 from the yards of Vickers Limited. She was part of the Weymouth subgroup....
  
   by torpedo on 15 May in 41°11'N., 18°15'E. She then sank 7 steamers and 12 sailing vessels in the central Mediterranean. 6 June, she was reported off Cape Passaro, 7 June in the vicinity of Straits of Messina, and 8 June was possibly attacked by seaplane in 39°4'N., 19°E.

• The next cruise of U-65 which can be reconstructed with probability was from 10 January to 31 January or 1 February 1918. On this cruise she sank 2 steamers and 1 sailing vessel, and was twice attacked from the air and once by depth-charged by Campanula
  Arabis class sloop
  The Arabis class was the third class of minesweeping sloops to be built under the Emergency War Programme for the Royal Navy in World War I as part of the larger "Flower Class", which were also referred to as the "Cabbage Class", or "Herbaceous Borders"...
  
  , which she missed by torpedo.

• A later possible cruise was for about the first 3 weeks of September 1918, on which she sank 4 steamers and damaged 4 more, between longitudes 8° and 17°E.

• At the end of October 1918 she was scuttled
  Scuttling
  Scuttling is the act of deliberately sinking a ship by allowing water to flow into the hull.This can be achieved in several ways—valves or hatches can be opened to the sea, or holes may be ripped into the hull with brute force or with explosives...
  
   by the Germans at Pola or Cattaro.

See also

• List of U-boats
• Room 40
  Room 40
  In the history of Cryptanalysis, Room 40 was the section in the Admiralty most identified with the British cryptoanalysis effort during the First World War.Room 40 was formed in October 1914, shortly after the start of the war...
  
  
• Anti-submarine warfare
  Anti-submarine warfare
  Anti-submarine warfare is a branch of naval warfare that uses surface warships, aircraft, or other submarines to find, track and deter, damage or destroy enemy submarines....
  
  
• Battle of the Atlantic

External links

• Photos of cruises of German submarine U-54 in 1916-1918.
• A 44 min. German film from 1917 about a cruise of the German submarine U-35.
• Uboat.net: More detailed information about U-65.
• Room 40: original documents, photos and maps about World War I German submarine warfare and British Room 40
  Room 40
  In the history of Cryptanalysis, Room 40 was the section in the Admiralty most identified with the British cryptoanalysis effort during the First World War.Room 40 was formed in October 1914, shortly after the start of the war...
  
   Intelligence from The National Archives, Kew, Richmond, UK.