SM UC-59 was a German Type UC II minelaying submarine or U-boat in the German Imperial Navy (German: Kaiserliche Marine) during World War I. The U-boat was ordered on 12 January 1916, laid down on 25 March 1916, and was launched on 28 September 1916. She was commissioned into the German Imperial Navy on 12 May 1917 as SM UC-59.[1] In nine patrols UC-59 was credited with sinking eight ships, either by torpedo or by mines laid. UC-59 was surrendered on 21 November 1918 and broken up at Bo'ness in 1919 – 20.
A Type UC II submarine, UC-59 had a displacement of 415t when at the surface and 498t while submerged. She had a length overall of 50.52m (165.75feet), a beam of 5.22m (17.13feet), and a draught of 3.61m (11.84feet). The submarine was powered by two six-cylinder four-stroke diesel engines each producing 290PS300PS (a total of 580PS600PS), two electric motors producing 620PS, 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-59 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 8.8sp=usNaNsp=us Uk L/30 deck gun. Her complement was twenty-six crew members.
| Date | Name | Nationality | Tonnage[2] | Fate[3] | |
|---|---|---|---|---|---|
| 20 August 1917 | Ilja Muromets | 330 | Sunk | ||
| 23 February 1918 | Remus |  United Kingdom | 1,079 | Sunk | |
| 28 June 1918 | Elbjorg |  Norway | 523 | Sunk | |
| 29 June 1918 | Drowning Thyra |  Denmark | 430 | Sunk | |
| 29 June 1918 | Ariadne | Norway | 496 | Sunk | |
| 12 July 1918 | Margrete | Denmark | 1,277 | Captured as prize | |
| 21 August 1918 | Hecla | Norway | 860 | Sunk | |
| 21 August 1918 | Loeke | Norway | 319 | Sunk | |
| 24 August 1918 | Auckland Castle | United Kingdom | 1,084 | Sunk |