German submarine U-339

German submarine U-339 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine during World War II. The submarine was laid down on 7 July 1941 at the Nordseewerke yard at Emden as yard number 211, launched on 30 June 1942 and commissioned on 25 August under the command of Kapitänleutnant Georg-Wilhelm Basse.
The U-boat spent most of her career as a training vessel. She sank or damaged no ships.
She was scuttled on 5 May 1945 at war's end near Wilhelmshaven.

Design

German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-339 had a displacement of when at the surface and while submerged. She 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 Germaniawerft F46 four-stroke, six-cylinder supercharged diesel engines producing a total of for use while surfaced, two AEG GU 460/8–27 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-339 was fitted with five torpedo tubes, fourteen torpedoes, one SK C/35 naval gun, 220 rounds, and two twin C/30 anti-aircraft guns. The boat had a complement of between forty-four and sixty.

The boat's service life began with training with the 8th U-boat Flotilla from 25 August 1942. She was then transferred to the 11th flotilla on 1 March 1943. She was reassigned to the 22nd flotilla on 1 April.

The boat was seriously damaged by depth charges dropped from a British PBY Catalina of No. 190 Squadron RAF on 26 March 1943. As a result, she spent the rest of the war as a training vessel.
She was scuttled near Wilhelmshaven on 5 May 1945.