German submarine U-776 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine during World War II.
She was ordered on 21 November 1940, and was laid down on 4 March 1943, at Kriegsmarinewerft, Wilhelmshaven, as yard number 159. She was launched on 4 March 1944, and commissioned under the command of Oberleutnant zur See Lothar Martin on 13 April 1944.
German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-776 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 & 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-776 was fitted with five torpedo tubes (four fitted at the bow and one at the stern), fourteen torpedoes or 26 TMA mines, one SK C/35 naval gun, (220 rounds), one Flak M42 and two twin C/30 anti-aircraft guns. The boat had a complement of between 44 â 52 men.
U-776 participated in one war patrol that yielded no ships sunk or damaged.
On 16 May 1945, U-776 surrendered at Portland, UK. For a brief time she was designated N-65, a British N-class submarine, and toured the British coast and used for tests. She was later transferred to Loch Ryan, Scotland. Of the 156 U-boats that eventually surrendered to the Allied forces at the end of the war, U-776 was one of 116 selected to take part in Operation Deadlight. U-776 was towed out on 3 December 1945, but sank after foundering on the way to the designated area. She was one of 56 U-boats that sank before reaching the scuttling areas.
The wreck now lies at .