Ships hit by UC 31
See the profile page for UC 31
| Date | U-boat | Commander | Name of ship | Type of ship | Tons | Nat. | ||
|---|---|---|---|---|---|---|---|---|
| 31 Dec 1916 | UC 31 | Otto von Schrader | Protector | Pilot boat | 200 |  | br | |
| 4 Jan 1917 | UC 31 | Otto von Schrader | Lonclara | Steamer | 1,294 | | br | |
| 25 Jan 1917 | UC 31 | Otto von Schrader |  | O. B. Suhr | Steamer | 1,482 |  | da |
| 28 Jan 1917 | UC 31 | Otto von Schrader | Alexandra | Trawler | 179 | | br | |
| 29 Jan 1917 | UC 31 | Otto von Schrader | Shamrock | Trawler | 173 | | br | |
| 29 Jan 1917 | UC 31 | Otto von Schrader | Thistle | Trawler | 167 | | br | |
| 31 Jan 1917 | UC 31 | Otto von Schrader | Ravensbourne | Steamer | 1,226 | | br | |
| 24 Feb 1917 | UC 31 | Otto von Schrader | Beneficent | steamer | 1,963 | | br | |
| 29 Mar 1917 | UC 31 | Otto von Schrader | Kathleen Lily | Steamer | 521 | | br | |
| 30 Mar 1917 | UC 31 | Otto von Schrader | Harberton | Steamer | 1,443 | | br | |
| 4 Apr 1917 | UC 31 | Otto von Schrader | | Helga | Steamer | 839 | | da |
| 5 Apr 1917 | UC 31 | Otto von Schrader | | N. J. Fjord | Steamer | 1,425 | | da |
| 6 Apr 1917 | UC 31 | Otto von Schrader | Strathrannoch | Navy Trawler | 215 | | br | |
| 11 Apr 1917 | UC 31 | Otto von Schrader | Quaggy | Steamer | 993 | | br | |
| 12 Apr 1917 | UC 31 | Otto von Schrader | Dina Hinderika | Sailing vessel | 200 |  | nl | |
| 12 Apr 1917 | UC 31 | Otto von Schrader | Neptunus | Sailing vessel | 209 | | nl | |
| 12 Apr 1917 | UC 31 | Otto von Schrader | Union | Sailing vessel | 152 | | da | |
| 12 Apr 1917 | UC 31 | Otto von Schrader | Voorwaarts | Sailing vessel | 147 | | nl | |
| 14 Apr 1917 | UC 31 | Otto von Schrader | Spray | Steamer | 1,072 | | br | |
| 15 Apr 1917 | UC 31 | Otto von Schrader | Brothertoft | Trawler | 155 | | br | |
| 6 May 1917 | UC 31 | Otto von Schrader | Poseidon I | Sailing vessel | 98 | | nl | |
| 8 May 1917 | UC 31 | Otto von Schrader | Zarefah | Navy Yacht | 279 | | br | |
| 17 May 1917 | UC 31 | Otto von Schrader | Aspen (d.) | Steamer | 3,103 |  | sw | |
| 17 May 1917 | UC 31 | Otto von Schrader | Viken | Steamer | 1,825 | | sw | |
| 30 Jun 1917 | UC 31 | Otto von Schrader | Lady Of The Lake | Sailing vessel | 51 | | br | |
| 1 Jul 1917 | UC 31 | Otto von Schrader | Amstelland | Steamer | 5,404 | | nl | |
| 2 Jul 1917 | UC 31 | Otto von Schrader | Thirlby | Steamer | 2,009 | | br | |
| 3 Jul 1917 | UC 31 | Otto von Schrader | Matador | Steamer | 3,642 | | br | |
| 7 Aug 1917 | UC 31 | Kurt Siewert | Othalia (d.) | Steamer | 1,205 | | sw | |
| 11 Aug 1917 | UC 31 | Kurt Siewert | | Holar | Steamer | 548 | | da |
| 12 Aug 1917 | UC 31 | Kurt Siewert | | Bogatyr | Steamer | 1,360 | | da |
| 8 Sep 1917 | UC 31 | Kurt Siewert | Newholm | Steamer | 3,399 | | br | |
| 11 Sep 1917 | UC 31 | Kurt Siewert | Cento (d.) | Steamer | 3,708 | | br | |
| 16 Sep 1917 | UC 31 | Kurt Siewert | Quatre Freres | Fishing vessel | 53 |  | fr | |
| 13 Nov 1917 | UC 31 | Kurt Siewert | Amelie | Steamer | 1,135 |  | be | |
| 13 Nov 1917 | UC 31 | Kurt Siewert | Australbush | Steamer | 4,398 |  | au | |
| 19 Nov 1917 | UC 31 | Kurt Siewert | Morococala | Trawler | 265 | | br | |
| 21 Jan 1918 | UC 31 | Kurt Siewert | Teelin Head | steamer | 1,718 | | br | |
| 29 Jan 1918 | UC 31 | Kurt Siewert | Ethelinda | Steamer | 3,257 | | br | |
| 1 Apr 1918 | UC 31 | Kurt Siewert | Ardglass | Steamer | 4,617 | | br | |
| 5 Apr 1918 | UC 31 | Kurt Siewert | | Cyrene | Steamer | 2,904 | | br |
| 10 Apr 1918 | UC 31 | Kurt Siewert | Magic (d.) | Destroyer | 1,025 | | br | |
| 60,058 | ||||||||
| 38 ships sunk (51,017 tons) and 4 ships damaged (9,041 tons).
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