SM UC-29 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 29 August 1915 and was launched on 15 July 1916. She was commissioned into the German Imperial Navy on 15 August 1916 as SM UC-29.[1] In an eight-month career, the UC-29 performed seven combat patrols into the Atlantic Ocean during the German war on Allied trade (Handelskrieg). In these patrols she was very successful, sinking 18 allied ships, totalling 21,909 GRT. She also damaged 4 ships of 17,154 GRT. On 7 June 1917 she torpedoed the British Q-ship off the Irish coast, but was ambushed by her hidden armaments when she approached too close and was sunk with 23 hands. Pargust was commanded by British submarine hunter Gordon Campbell and had on board Ronald Niel Stuart and William Williams, who were awarded the Victoria Cross for their actions in the engagement.
Her wreck lies in Cork Harbour, Ireland.[2]
A Type UC II submarine, UC-29 had a displacement of 400t when at the surface and 480t while submerged. She had a length overall of 49.45m (162.24feet), a beam of 5.22m (17.13feet), and a draught of 3.68m (12.07feet). The submarine was powered by two six-cylinder four-stroke diesel engines each producing 260PS (a total of 520PS), two electric motors producing 460PS, 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-29 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[3] | Fate[4] | |
|---|---|---|---|---|---|
| 17 November 1916 | Canganian |  United Kingdom | 1,143 | Sunk | |
| 23 January 1917 | Clan Shaw | United Kingdom | 3,943 | Sunk | |
| 24 January 1917 | Sunniva |  Norway | 589 | Sunk | |
| 5 February 1917 | Primrose | United Kingdom | 136 | Sunk | |
| 9 February 1917 | HMT Yesso | 229 | Sunk | ||
| 10 February 1917 | San Fraterno | United Kingdom | 9,587 | Damaged | |
| 11 February 1917 | Norwood | United Kingdom | 798 | Sunk | |
| 11 February 1917 | Roanoke | United Kingdom | 3,455 | Damaged | |
| 1 March 1917 | Herbert Ingram | United Kingdom | 142 | Sunk | |
| 1 March 1917 | Redcap | United Kingdom | 199 | Sunk | |
| 3 March 1917 | HMT Northumbria | 211 | Sunk | ||
| 14 March 1917 | Storaas | Norway | 3,041 | Sunk | |
| 24 April 1917 | Upton Castle | United Kingdom | 145 | Sunk | |
| 27 April 1917 | Nidelven | Norway | 1,262 | Sunk | |
| 27 April 1917 | Ragnhild | Norway | 1,117 | Sunk | |
| 29 April 1917 | Carbo I |  Denmark | 1,385 | Sunk | |
| 1 May 1917 | Firelight | United Kingdom | 1,143 | Sunk | |
| 3 June 1917 | Elisabeth |  France | 2,061 | Sunk | |
| 3 June 1917 | HMS Mavis | 1,295 | Damaged | ||
| 4 June 1917 | Songvand | Norway | 2,206 | Sunk | |
| 7 June 1917 | 2,817 | Damaged | |||
| 3 August 1917 | Hornchurch | United Kingdom | 2,159 | Sunk |