SM UC-65 was a German Type UC II minelaying submarine or U-boat in the German Imperial Navy () during World War I. The U-boat was ordered on 12 January 1916 and was launched on 8 July 1916. She was commissioned into the German Imperial Navy on 7 November 1916 as SM UC-65."SM" stands for "Seiner Majestät" () and combined with the U for Unterseeboot would be translated as His Majesty's Submarine. In eleven patrols UC-65 was credited with sinking 106 ships, either by torpedo or by mines laid. UC-65 was torpedoed and sunk by on 3 November 1917.*
Design A Type UC II submarine, UC-65 had a displacement of when at the surface and while submerged. She had a length overall of , a beam of , and a draught of . The submarine was powered by two six-cylinder four-stroke diesel engines each producing (a total of ), two electric motors producing , and two propeller shafts. She had a dive time of 48 seconds and was capable of operating at a depth of .
The submarine had a maximum surface speed of and a submerged speed of . When submerged, she could operate for at ; when surfaced, she could travel at . UC-65 was fitted with six mine tubes, eighteen UC 200 mines, three torpedo tubes (one on the stern and two on the bow), seven torpedoes, and one Uk L/30 deck gun. Her complement was twenty-six crew members.
Summary of raiding history DateNameNationalityTonnageMerchant ship tonnages are in gross register tons. Military vessels are listed by tons displacement.Fate8 February 1917Guillaume Tell148Sunk8 February 1917Mary Ann17Sunk10 February 1917Sallagh325Sunk11 February 1917Lycia2,715Sunk11 February 1917Olivia242Sunk11 February 1917Voltaire409Sunk12 February 1917Pinna6,288Damaged13 February 1917Friendship37Sunk13 February 1917Zircon48Sunk14 February 1917Ferga791Sunk14 February 1917Greenland1,753Sunk14 February 1917Inishowen Head3,050Sunk14 February 1917Margarita375Sunk15 February 1917Afton1,156Sunk15 February 1917Kyanite564Sunk16 February 1917Queenswood2,710Sunk16 February 1917Ville De Bayonne1,301Sunk19 February 1917Alice18Sunk19 February 1917Brigade425Sunk19 February 1917Justine Marie16Sunk19 February 1917Saint Louis De Gonzague53Sunk19 February 1917Skrim727Sunk19 February 1917Violette36Sunk25 February 1917Saint Joseph42Sunk25 February 1917Vigda1,851Sunk26 February 1917Alberdina134Sunk26 February 1917Algiers2,361Sunk26 February 1917Hannah Croasdell151Sunk27 February 1917Brunette104Sunk27 February 1917HMT Evadne189Sunk28 February 1917Marie Joseph192Sunk28 February 1917Sjøstad1,155Sunk1 March 1917Germaine24Sunk1 March 1917Bout De Zan13Sunk1 March 1917Diamond Cross29Sunk1 March 1917Drina11,483Sunk1 March 1917Elise II48Sunk1 March 1917Elorn603Sunk1 March 1917General Radiguet24Sunk1 March 19176,824Damaged1 March 1917Homocea58Sunk1 March 1917Joseph Adolphine21Sunk1 March 1917N.D. de Lourdes47Sunk1 March 1917Reine des Anges47Sunk1 March 1917Saint Joseph20Sunk1 March 1917Sainte Famille25Sunk1 March 1917Seigneur53Sunk1 March 1917SarusUnknownDamaged24 March 1917Bruyere100Sunk24 March 1917Ennistown689Sunk24 March 1917Fairearn592Sunk24 March 1917Howe175Sunk24 March 1917Korsnaes732Sunk25 March 1917Adenwen3,798Sunk25 March 1917Brandon130Sunk25 March 1917Fringante124Sunk25 March 1917Poseidon2,589Sunk27 March 1917Kelvinhead3,063Sunk28 March 1917Ardglass778Sunk28 March 1917Dagali742Sunk28 March 1917Harvest Home103Sunk28 March 1917Laima148Sunk28 March 1917Snowdon Range4,662Sunk28 March 1917Wychwood1,985Sunk28 March 1917GuillemotUnknownSunk30 March 1917HMS Puma1,459Damaged6 April 1917Thelma1,350Sunk7 April 191718,565Damaged9 April 191710,798Damaged26 April 1917Agnes Cairns146Sunk26 April 1917Athole150Sunk26 April 1917Bretagne Et Vendee79Sunk27 April 1917Burrowa2,902Sunk28 April 1917Alu Mendi2,104Sunk1 May 1917Helen322Sunk1 May 1917Ivrig1,197Sunk1 May 1917W. D. Potts112Sunk2 May 1917Amber401Sunk2 May 1917Derrymore485Sunk2 May 1917Dora296Sunk2 May 1917Earnest111Sunk2 May 1917Morion299Sunk2 May 1917Saint Mungo402Sunk2 May 1917Taizan Maru3,527Sunk4 May 1917New Design No.266Sunk4 May 1917Pilar De Larrinaga4,136Sunk4 May 1917Strumble45Sunk4 May 1917Victorious39Sunk7 May 1917Maude93Sunk8 May 1917San Patricio9,712Damaged22 May 1917HMT Merse296Sunk17 June 1917HMT Fraser310Sunk17 June 1917850Damaged18 June 1917Gauntlet58Sunk18 June 1917Væring2,157Sunk19 June 1917Morinier3,804Damaged24 June 1917Aghia Paraskevi2,795Sunk24 June 1917Constantinos3,014Sunk24 June 1917Kong Haakon2,231Sunk24 June 1917Taigetos2,961Sunk25 June 1917Petritzis3,692Sunk28 June 1917Lizzie Ellen114Sunk20 July 1917Fluent3,660Sunk26 July 191711,000Sunk27 July 1917Bellagio3,919Damaged27 July 1917Candia6,482Sunk28 July 1917Saint Emilion1,112Sunk19 August 1917General Dutemple585Sunk25 August 1917Garm725Sunk25 August 1917Nerma689Sunk29 August 1917Laura C. Anderson960Sunk31 August 1917Erissos2,885Damaged1 September 1917Peronne3,342Sunk25 September 1917Paolina1,337Sunk3 October 1917Tasmania3,662Sunk18 October 1917HMD Comrades63Sunk31 October 1917North Sea1,711Sunk2 November 1917Branksome Hall4,262Damaged
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