German submarine U-1307
German submarine "U-1307" was a Type VIIC/41 U-boat of Nazi Germany's "Kriegsmarine" during World War II. She was ordered on 1 August 1942, and was laid down on 2 December 1943, at Flensburger Schiffbau-Gesellschaft, Flensburg, as yard number 500. She was launched on 29 September 1944, and commissioned under the command of "Oberleutnant zur See" Hans Buscher on 17 November 1944. Design. German Type VIIC/41 submarines were preceded by the heavier Type VIIC submarines. "U-1307" had a displacement of when at the surface and while submerged. She had a total length of , a pressure  hull length of , an overall 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 460/8-276 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-1307" 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), one Flak M42 and two C/30 anti-aircraft guns. The boat had a complement of between forty-four and fifty-two. Sensors. Passive sonar. "U-1307" was one of only ten Type VIICs to be fitted with a "Balkongerät" (literally 'Balcony apparatus or equipment'). The "Balkongerät" was used on U-boats , , , , , , , , and . The "Balkongerät" was standard on the Type XXI and the Type XXIII. Nonetheless, it was also fitted to several Type IXs and one  Type X. The "Balkongerät" was an improved version of Gruppenhorchgerät (GHG) (group listening device). The GHG had 24 hydrophones, the "Balkongerät" had 48 hydrophones and improved electronics, which enabled more accurate readings to be taken. Service history. On 9 May 1945, "U-1307" surrendered at Bergen, Norway. She was later transferred to Loch Ryan, Scotland on 2 June 1945. Of the 156 U-boats that eventually surrendered to the Allied forces at the end of the war, "U-1307" was one of 116 selected to take part in Operation Deadlight. "U-1307" was towed out and sank on 9 December 1945, by rockets  from a British Firefly aircraft launched from the escort carrier . The wreck now lies at .