| Date | U-boat | Commander | | Name of ship | Type of ship | Tons | Nat. |
|---|
| |
| 14 Aug 1915 | UC 6 | Matthias Graf von Schmettow | | Worsley | Navy Trawler | 309 |  | br |
| 16 Aug 1915 | UC 6 | Matthias Graf von Schmettow | | Japan | Navy Trawler | 205 | | br |
| 25 Aug 1915 | UC 6 | Matthias Graf von Schmettow | | Disa | Steamer | 788 |  | sw |
| 28 Aug 1915 | UC 6 | Matthias Graf von Schmettow | | Dane | Navy Trawler | 265 | | br |
| 29 Aug 1915 | UC 6 | Matthias Graf von Schmettow | | Sir William Stephenson | Passenger steamer | 1,540 | | br |
| 16 Sep 1915 | UC 6 | Matthias Graf von Schmettow |  | Africa | Steamer | 1,038 | | br |
| 18 Sep 1915 | UC 6 | Matthias Graf von Schmettow | | Lydian | Navy Trawler | 244 | | br |
| 18 Sep 1915 | UC 6 | Matthias Graf von Schmettow | | San Zeferino (d.) | Tanker | 6,430 | | br |
| 20 Sep 1915 | UC 6 | Matthias Graf von Schmettow | | Horden | Steamer | 1,434 | | br |
| 23 Sep 1915 | UC 6 | Matthias Graf von Schmettow | | Groningen | Steamer | 988 | | br |
| 24 Sep 1915 | UC 6 | Matthias Graf von Schmettow | | Great Heart | Navy Drifter | 78 | | br |
| 27 Sep 1915 | UC 6 | Matthias Graf von Schmettow | | Nigretia (d.) | Steamer | 3,187 | | br |
| 5 Oct 1915 | UC 6 | Matthias Graf von Schmettow | | Alose | Navy Trawler | 214 |  | fr |
| 18 Oct 1915 | UC 6 | Matthias Graf von Schmettow | | Aleppo (d.) | Steamer | 3,870 | | br |
| 18 Oct 1915 | UC 6 | Matthias Graf von Schmettow | | Salerno | Steamer | 2,431 |  | nw |
| 21 Oct 1915 | UC 6 | Matthias Graf von Schmettow | | Monitoria | Steamer | 1,904 | | br |
| 31 Oct 1915 | UC 6 | Matthias Graf von Schmettow | | Aries | Navy Yacht | 268 | | br |
| 31 Oct 1915 | UC 6 | Matthias Graf von Schmettow | | Eidsiva | Steamer | 1,092 | | nw |
| 31 Oct 1915 | UC 6 | Matthias Graf von Schmettow | | Othello Ii | Navy Trawler | 206 | | br |
| 31 Oct 1915 | UC 6 | Matthias Graf von Schmettow | | Toward | Steamer | 1,218 | | br |
| 3 Nov 1915 | UC 6 | Matthias Graf von Schmettow | | Friargate | Steamer | 264 | | br |
| 12 Nov 1915 | UC 6 | Matthias Graf von Schmettow | | Moorside | Steamer | 311 | | br |
| 12 Nov 1915 | UC 6 | Matthias Graf von Schmettow | | Nigel | Steamer | 1,400 | | br |
| |
| 12 Jan 1916 | UC 6 | Matthias Graf von Schmettow | | Traquair | Steamer | 1,067 | | br |
| 12 Feb 1916 | UC 6 | Matthias Graf von Schmettow | | Leicester | Steamer | 1,001 | | br |
| 21 Feb 1916 | UC 6 | Matthias Graf von Schmettow | | Carlton | Navy Trawler | 267 | | br |
| 24 Feb 1916 | UC 6 | Matthias Graf von Schmettow | | Trignac | Steamer | 2,375 | | fr |
| 27 Feb 1916 | UC 6 | Matthias Graf von Schmettow | | Empress Of Fort William | Steamer | 2,181 | | br |
| 27 Feb 1916 | UC 6 | Matthias Graf von Schmettow | | Maloja | Passenger steamer | 12,431 | | br |
| 28 Feb 1916 | UC 6 | Matthias Graf von Schmettow | | Angelus | Navy Trawler | 304 | | br |
| 28 Feb 1916 | UC 6 | Matthias Graf von Schmettow | | Weigelia | Navy Trawler | 262 | | br |
| 4 Mar 1916 | UC 6 | Matthias Graf von Schmettow | | Flicker | Navy Trawler | 192 | | br |
| 23 Mar 1916 | UC 6 | Matthias Graf von Schmettow | | Corona | Navy Trawler | 212 | | br |
| 23 Mar 1916 | UC 6 | Matthias Graf von Schmettow | | Sea Serpent | Steamer | 902 | | br |
| 24 Mar 1916 | UC 6 | Matthias Graf von Schmettow | | Christianssund | Passenger steamer | 1,017 |  | da |
| 26 Mar 1916 | UC 6 | Matthias Graf von Schmettow | | Saint Cecilia | Steamer | 4,411 | | br |
| 7 Apr 1916 | UC 6 | Matthias Graf von Schmettow | | Halcyon | Steamer | 1,319 | | br |
| 14 Apr 1916 | UC 6 | Matthias Graf von Schmettow | | Shenandoah | Steamer | 3,886 | | br |
| 21 Apr 1916 | UC 6 | Matthias Graf von Schmettow | | Estafette | Navy Trawler | 267 | | fr |
| 29 Apr 1916 | UC 6 | Matthias Graf von Schmettow | | Saint Corentin | Navy Trawler | 216 | | fr |
| 16 May 1916 | UC 6 | Matthias Graf von Schmettow | | Batavier V | Passenger steamer | 1,569 |  | nl |
| 26 May 1916 | UC 6 | Otto Ehrentraut | | Volharding | Barge | 1,000 |  | be |
| 1 Jun 1916 | UC 6 | Otto Ehrentraut | | Excellenz Mehnert | Steamer | 646 | | nw |
| 8 Jun 1916 | UC 6 | Otto Ehrentraut | | Kaphreda | Navy Trawler | 245 | | br |
| 19 Jun 1916 | UC 6 | Otto Ehrentraut | | Corton Light Vessel | Light vessel | unknown | | br |
| 19 Jun 1916 | UC 6 | Matthias Graf von Schmettow | | Saint Jacques | Trawler | 72 | | fr |
| 21 Jun 1916 | UC 6 | Otto Ehrentraut | | Otis Tarda | Steamer | 759 | | nl |
| 23 Jun 1916 | UC 6 | Otto Ehrentraut | | Burma | Steamer | 706 | | br |
| 27 Jun 1916 | UC 6 | Otto Ehrentraut | | Waalstroom | Steamer | 1,441 | | nl |
| 29 Jun 1916 | UC 6 | Otto Ehrentraut | | Hirose | Navy Trawler | 275 | | br |
| 7 Jul 1916 | UC 6 | Otto Ehrentraut | | Gannet | steamer | 1,127 | | br |
| 10 Jul 1916 | UC 6 | Otto Ehrentraut | | Kara | Steamer | 2,338 | | br |
| 3 Sep 1916 | UC 6 | Otto Ehrentraut | | Mascotte | Steamer | 1,097 | | br |
| 2 Oct 1916 | UC 6 | Paul Günther | | Girl Eva | Navy Drifter | 76 | | br |
| 29 Dec 1916 | UC 6 | Werner von Zerboni di Sposetti | | Lonada | Steamer | 1,286 | | br |
| 29 Dec 1916 | UC 6 | Werner von Zerboni di Sposetti | | Ludlow | Minesweeper | 810 | | br |
| 29 Dec 1916 | UC 6 | Werner von Zerboni di Sposetti | | Totnes (d.) | Minesweeper | 810 | | br |
| |
| 22 Feb 1917 | UC 6 | Werner von Zerboni di Sposetti | | Ashtabula (d.) | Tanker | 7,025 | | br |
| 31 Mar 1917 | UC 6 | Werner von Zerboni di Sposetti | | Forward Iii | Navy Drifter | 89 | | br |
| 19 Apr 1917 | UC 6 | Werner von Zerboni di Sposetti | | Lumina (d.) | Tanker | 5,856 | | br |
| 12 May 1917 | UC 6 | Werner von Zerboni di Sposetti | | Waterville (d.) | Steamer | 1,968 | | br |
| 7 Jun 1917 | UC 6 | Werner Löwe | | Mercury (d.) | Auxiliary minesweeper | 378 | | br |
| 16 Jun 1917 | UC 6 | Werner Löwe | | Roald Amundsen (d.) | Steamer | 4,390 | | nw |
| 18 Jun 1917 | UC 6 | Werner Löwe | | Dorte Jensen | Steamer | 2,086 | | da |
|
| 98,043 | | | 55 ships sunk (64,129 tons) and 9 ships damaged (33,914 tons).
Legend
(d.) means the ship was damaged.
We have a picture of this vessel.
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