SM ''UC-23'' was a German Type UC II

minelaying A minelayer is any warship, submarine, military aircraft or land vehicle deploying explosive mines. Since World War I the term "minelayer" refers specifically to a naval ship used for deploying naval mines. "Mine planting" was the term for ins ...

submarine A submarine (often shortened to sub) is a watercraft capable of independent operation underwater. (It differs from a submersible, which has more limited underwater capability.) The term "submarine" is also sometimes used historically or infor ...

U-boat U-boats are Submarine#Military, naval submarines operated by Germany, including during the World War I, First and Second World Wars. The term is an Anglicization#Loanwords, anglicized form of the German word , a shortening of (), though the G ...

in the

German Imperial Navy The Imperial German Navy or the ''Kaiserliche Marine'' (Imperial Navy) was the navy of the German Empire, which existed between 1871 and 1919. It grew out of the small Prussian Navy (from 1867 the North German Federal Navy), which was mainly f ...

() during

World War I World War I or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a World war, global conflict between two coalitions: the Allies of World War I, Allies (or Entente) and the Central Powers. Fighting to ...

. The U-boat was ordered on 29 August 1915 and was

launch Launch or launched may refer to: Involving vehicles * Launch (boat), one of several different sorts of boat ** Motor launch (naval), a small military vessel used by the Royal Navy * Air launch, the practice of dropping an aircraft, rocket, or ...

ed on 29 February 1916. She was

commission In-Commission or commissioning may refer to: Business and contracting * Commission (remuneration), a form of payment to an agent for services rendered ** Commission (art), the purchase or the creation of a piece of art most often on behalf of anot ...

ed into the German Imperial Navy on 17 July 1916 as SM ''UC-23''."SM" stands for "Seiner Majestät" () and combined with the ''U'' for ''Unterseeboot'' would be translated as ''His Majesty's Submarine''. In 17 patrols ''UC-23'' was credited with sinking 46 ships, either by torpedo or by

mines Mine, mines, miners or mining may refer to: Extraction or digging *Miner, a person engaged in mining or digging *Mining, extraction of mineral resources from the ground through a mine Grammar *Mine, a first-person English possessive pronoun Mi ...

laid. ''UC-23'' was surrendered at

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on 25 November 1918 and

broken up Ship breaking (also known as ship recycling, ship demolition, ship scrapping, ship dismantling, or ship cracking) is a type of ship disposal involving the breaking up of ships either as a source of Interchangeable parts, parts, which can be sol ...

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in August 1921.

Design

Like all pre-''UC-25'' Type UC II submarines, ''UC-23'' had a displacement of when at the surface and while submerged. She had a

length overall Length overall (LOA, o/a, o.a. or oa) is the maximum length of a vessel's hull measured parallel to the waterline. This length is important while docking the ship. It is the most commonly used way of expressing the size of a ship, and is also ...

of , a

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of , and a draught of . The submarine was powered by two six-cylinder four-stroke diesel engines each producing (a total of ), two

electric motor An electric motor is a machine that converts electrical energy into mechanical energy. Most electric motors operate through the interaction between the motor's magnetic field and electric current in a electromagnetic coil, wire winding to gene ...

s producing , and two

propeller shaft A drive shaft, driveshaft, driving shaft, tailshaft (Australian English), propeller shaft (prop shaft), or Cardan shaft (after Girolamo Cardano) is a component for transmitting mechanical power, torque, and rotation, usually used to connect o ...

s. She had a dive time of 35 seconds and was capable of operating at a depth of . The submarine had a maximum surface speed of and a submerged speed of . When submerged, she could operate for at ; when surfaced, she could travel at . ''UC-23'' was fitted with six mine tubes, eighteen UC 200 mines, three

torpedo tube A torpedo tube is a cylindrical device for launching torpedoes. There are two main types of torpedo tube: underwater tubes fitted to submarines and some surface ships, and deck-mounted units (also referred to as torpedo launchers) installed aboa ...

s (one on the stern and two on the bow), seven torpedoes, and one Uk L/30

deck gun A deck gun is a type of naval artillery mounted on the deck of a submarine. Most submarine deck guns were open, with or without a shield; however, a few larger submarines placed these guns in a turret. The main deck gun was a dual-purpose w ...

. Her

complement Complement may refer to: The arts * Complement (music), an interval that, when added to another, spans an octave ** Aggregate complementation, the separation of pitch-class collections into complementary sets * Complementary color, in the visu ...

was twenty-six crew members.

Summary of raiding history

References

Notes

Citations

Bibliography

* * * * {{DEFAULTSORT:Uc023 Ships built in Hamburg German Type UC II submarines U-boats commissioned in 1916 World War I minelayers of Germany World War I submarines of Germany 1916 ships