German submarine U-14 was a Type IIB U-boat of Nazi Germany's Kriegsmarine during World War II. It served with 3rd U-boat Flotilla from 18 January 1936 to 31 October 1939. U-14 completed six wartime patrols and sank nine ships totalling .

Design German Type IIB submarines were enlarged versions of the original Type IIs. U-14 had a displacement of when at the surface and while submerged. Officially, the standard tonnage was , however. The U-boat had a total length of , a pressure hull length of , a beam of , a height of , and a draught of . The submarine was powered by two MWM RS 127 S four-stroke, six-cylinder diesel engines of for cruising, two Siemens-Schuckert PG VV 322/36 double-acting electric motors producing a total of for use while submerged. She had two shafts and two propellers. The boat was capable of operating at depths of up to .

The submarine had a maximum surface speed of and a maximum submerged speed of . When submerged, the boat could operate for at ; when surfaced, she could travel at . U-14 was fitted with three torpedo tubes at the bow, five torpedoes or up to twelve Type A torpedo mines, and a anti-aircraft gun. The boat had a complement of twentyfive.

Service history Early in the war, on 3 September 1939 in the evening, U-14 attacked a Polish submarine with one torpedo from a surface, and claimed to have sunk it. In reality the Polish submarine, , was not damaged as the torpedo launched by U-14 exploded prematurely. According to Jan Bartelski, the torpedo also missed the target.

After serving on six operational patrols, U-14 was used as a training boat and transferred to U-boat training flotillas, serving with the 23rd and 24th U-boat Flotillas until the end of the war. Despite the high casualties suffered by the Unterseebootwaffen (German submarine arm), U-14 suffered no known casualties during the war.

U-14 was scuttled on 5 May 1945 at Wilhelmshaven.

Summary of raiding history Date Name Nationality Tonnage(GRT) Fate25 January 1940Biarritz1,752Sunk15 February 1940Sliepner1,066Sunk16 February 1940Liana1,646Sunk16 February 1940Osmed1,526Sunk 16 February 1940Rhone1,064Sunk7 March 1940Vecht1,965Sunk9 March 1940Abbotsford1,585Sunk9 March 1940Akeld643Sunk9 March 1940Borthwick1,097Sunk

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