SM UC-49 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 20 November 1915 and was launched on 7 November 1916. She was commissioned into the German Imperial Navy on 2 December 1916 as SM UC-49.[1] In 13 patrols UC-49 was credited with sinking 26 ships, either by torpedo or by mines laid. UC-49 was sunk by mine off coast of Flanders on 14 August 1918.
A Type UC II submarine, UC-49 had a displacement of 434t when at the surface and 511t while submerged. She had a length overall of 52.69m (172.87feet), a beam of 5.22m (17.13feet), and a draught of 3.64m (11.94feet). 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-49 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] | |
|---|---|---|---|---|---|
| 3 May 1917 | Helge |  Denmark | 162 | Sunk | |
| 7 May 1917 | Tore Jarl |  Norway | 1,256 | Sunk | |
| 9 May 1917 | Windward Ho |  United Kingdom | 226 | Sunk | |
| 14 May 1917 | Bel Lily | United Kingdom | 168 | Sunk | |
| 17 June 1917 | Tosto | Norway | 1,234 | Sunk | |
| 22 July 1917 | Cotovia | United Kingdom | 4,020 | Sunk | |
| 23 July 1917 | HMS Otway | 12,077 | Sunk | ||
| 24 July 1917 | Blake | United Kingdom | 3,740 | Sunk | |
| 25 July 1917 | Dea | Norway | 1,109 | Sunk | |
| 25 August 1917 | Nascent | United Kingdom | 4,969 | Sunk | |
| 2 September 1917 | HMS Dundee | 2,187 | Sunk | ||
| 21 October 1917 | Bunty | United Kingdom | 73 | Sunk | |
| 8 December 1917 | Maindy Bridge | United Kingdom | 3,653 | Sunk | |
| 3 January 1918 | HMW Blackwhale | 237 | Sunk | ||
| 24 January 1918 | Fylgia |  Sweden | 1,741 | Sunk | |
| 24 January 1918 | Jönköping 2 | Sweden | 1,274 | Sunk | |
| 9 February 1918 | Maggie Smith | United Kingdom | 24 | Sunk | |
| 21 February 1918 | Bør | Norway | 1,149 | Sunk | |
| 21 February 1918 | Reaper | United Kingdom | 91 | Sunk | |
| 24 February 1918 | Amsterdam | United Kingdom | 806 | Sunk | |
| 1 May 1918 | Samsö | Denmark | 324 | Sunk | |
| 10 June 1918 | Mountby | United Kingdom | 3,263 | Sunk | |
| 13 June 1918 | HMS Patia | 6,103 | Sunk | ||
| 22 June 1918 | Rhea | United Kingdom | 1,308 | Sunk | |
| 3 August 1918 | 7,713 | Sunk | |||
| 8 August 1918 | Portwood | United Kingdom | 2,241 | Damaged | |
| 13 August 1918 | City of Brisbane | United Kingdom | 7,138 | Sunk |