German World War II submarine
German submarine "U-713" was a Type VIIC U-boat of Nazi Germany's "Kriegsmarine" during World War II. The submarine was laid down on 21 October 1941 at the H. C. Stülcken Sohn yard at Hamburg, launched on 24 September 1942, and commissioned on 29 December 1942 under the command of "Oberleutnant zur See" Henri Gosejacob.
Attached to 8th U-boat Flotilla based at Danzig, "U-713" completed her training period on 30 June 1943 and was assigned to front-line service.
Design.
German Type VIIC submarines were preceded by the shorter Type VIIB submarines. "U-713" 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 Garbe, Lahmeyer &amp; Co. RP 137/c 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-713" was fitted with five torpedo tubes (four fitted at the bow and one at the stern), 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.
Service history.
Fate.
"U-713" was missing since 24 February 1944 in the Norwegian Sea north-west of Narvik.
Previously recorded fate.
While operating against convoy JW 57 on 24 February 1944, "U-713" was spotted by a Swordfish from . The destroyer HMS "Keppel" was directed towards the U-boat and attacked with depth charges, sinking "U-713" in position .
References.
 ;templatestyles src="Reflist/styles.css" / ;
Bibliography.
 ;templatestyles src="Refbegin/styles.css" / ;