SM U-80
Introduction '''SM ''U-80''''' was one of the 329 submarines serving in the Imperial German Navy in World War I. ''U-80'' was engaged in the naval warfare and took part in the First Battle of the Atlantic. ''U-80'' is credited for sinking the , the 24th largest ship sunk in World War I by U-boats, at . She struck two mines laid by ''U-80'' off Malin Head, and sank within one hour. She went down with 345 casualties, and 35 tons of gold ingots. ''U-80'' is also credited with damaging the 6th largest ship, the , at , 15 February 1917 at . ''Celtic'' would be torpedoed later in the war by , but was beached and later salvaged. ''U-80'' was surrendered to the Allies at Harwich on 16 January 1919 in accordance with the requirements of the Armistice with Germany. She was sold by the British Admiralty to George Cohen on 3 March 1919 for £2,300 (excluding engines), and was broken up at Swansea.
Design German Type UE I submarines were preceded by the longer Type U 66 submarines. ''U-80'' 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  engines for use while surfaced, and two  engines for use while submerged. She had two propeller shafts. She 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, she could operate for  at ; when surfaced, she could travel  at . ''U-80'' was fitted with two  torpedo tubes (one at the port bow and one starboard stern), four torpedoes, and one  SK L/30 deck gun. She had a complement of thirty-two (twenty-eight crew members and four officers).
Summary of raiding history DateNameNationalityTonnageFate 4 November 1916''Skerries''4,278Sunk18 December 1916''Opal''599Sunk19 December 1916''Liverpool''686Sunk25 January 1917HMS ''Laurentic''14,892Sunk15 February 191720,904Damaged1 March 1917HMS ''Pheasant''1,025Sunk3 March 1917''Hermes''785Sunk10 March 1917''San Eduardo''6,225Damaged16 March 1917HMS ''Motagua''5,977Damaged17 April 1917''Gisella''2,502Damaged7 May 1917''H. H. Petersen''192Sunk7 May 1917''Sophie''237Sunk9 May 1917''Hans Broge''1,432Sunk11 May 1917''Anna Alwina''364Sunk11 May 1917''Calchas''6,748Sunk21 May 1917HMT ''Senator''211Sunk1 July 1917''Don Emilio''3,651Sunk15 August 1917''Hylas''4,240Sunk16 August 1917''Caroline Kock''316Sunk20 August 1917HMT ''Kirkland''224Sunk25 August 1917''Junona''3,462Sunk6 September 1917''Tuskar''1,159Sunk17 December 1917''Neptune''50Sunk19 December 1917''Arno''1,386Sunk23 April 1918HMT ''Plethos''210Sunk1 May 1918HMS ''Blackmorevale''750Sunk5 June 1918''Anton''1,036Sunk29 June 1918''Midtsjö''185Sunk3 July 1918''Gripen''1,191Sunk3 July 1918''P. C. Peterson''673Sunk11 October 1918''Helvetia''673Sunk
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