August 1917
This is the full listing of all ships hit during August 1917. You can click on any of the links for further information on either ship, U-boat, commander or convoy.
Ships hit by U-boats during August 1917
| Date | U-boat | Commander | Name of ship | Type of ship | Tons | Nat. | ||
|---|---|---|---|---|---|---|---|---|
| 1 Aug 1917 | U 155 | Karl Meusel | Alexandre | Sailing vessel | 2,671 |  | fr | |
| 1 Aug 1917 | U 33 | Gustav Sieß | Llandudno | Steamer | 4,187 |  | br | |
| 1 Aug 1917 | U 72 | Johannes Feldkirchner | Rokeby (d.) | Steamer | 3,786 | | br | |
| 1 Aug 1917 | UB 31 | Thomas Bieber | Alcyone | Motor vessel | 149 | | br | |
| 1 Aug 1917 | UB 31 | Thomas Bieber | Laertes | Steamer | 4,541 | | br | |
| 1 Aug 1917 | UC 75 | Johannes Lohs | Karina | Passenger steamer | 4,222 | | br | |
| 2 Aug 1917 | U 155 | Karl Meusel | Marthe | Sailing vessel | 3,119 | | fr | |
| 2 Aug 1917 | U 61 | Victor Dieckmann | Libia | Steamer | 2,416 | | fr | |
| 2 Aug 1917 | UB 31 | Thomas Bieber | Newlyn | Steamer | 4,019 | | br | |
| 2 Aug 1917 | UC 23 | Volkhard von Bothmer | Ermine | Fleet messenger | 1,777 | | br | |
| 2 Aug 1917 | UC 63 | Karsten von Heydebreck | Young Bert | Fishing vessel (smack) | 59 | | br | |
| 3 Aug 1917 | U 39 | Walter Forstmann | Halldor | Steamer | 2,919 |  | nw | |
| 3 Aug 1917 | UB 31 | Thomas Bieber | Renee Marthe | Sailing vessel | 50 | | fr | |
| 3 Aug 1917 | UC 22 | Erich Wiesenbach | San Nicola | Sailing vessel | 30 |  | it | |
| 3 Aug 1917 | UC 29 | Ernst Rosenow | Hornchurch | Steamer | 2,159 | | br | |
| 3 Aug 1917 | UC 71 | Reinhold Saltzwedel | Aube | Steamer | 1,837 | | br | |
| 3 Aug 1917 | UC 75 | Johannes Lohs | Beechpark | Steamer | 4,763 | | br | |
| 4 Aug 1917 | U 33 | Gustav Sieß | Angelina T. | Sailing vessel | 146 | | it | |
| 4 Aug 1917 | U 61 | Victor Dieckmann | Countess Of Mar | Steamer | 2,234 | | br | |
| 4 Aug 1917 | U 72 | Johannes Feldkirchner | British Monarch | Steamer | 5,749 | | br | |
| 4 Aug 1917 | UB 22 | Karl Wacker | Azira | Steamer | 1,144 | | br | |
| 4 Aug 1917 | UC 71 | Reinhold Saltzwedel | Afrique (d.) | Steamer | 2,457 | | fr | |
| 4 Aug 1917 | UC 71 | Reinhold Saltzwedel | Cairnstrath | Steamer | 2,128 | | br | |
| 5 Aug 1917 | U 100 | Degenhart von Loë | Kathleen | Steamer | 3,915 | | br | |
| 5 Aug 1917 | U 39 | Walter Forstmann | Ryton | Steamer | 3,991 | | br | |
| 5 Aug 1917 | U 44 | Paul Wagenführ |  | Bracondale | Q ship | 2,095 | | br |
| 5 Aug 1917 | U 61 | Victor Dieckmann | Campo Libre | Fishing vessel | 50 |  | sp | |
| 5 Aug 1917 | U 61 | Victor Dieckmann | Sauternes | Steamer | 902 | | fr | |
| 6 Aug 1917 | U 101 | Karl Koopmann | Rosemount | Steamer | 3,044 | | br | |
| 6 Aug 1917 | U 55 | Wilhelm Werner | Eugenia | Steamer | 4,835 | | it | |
| 6 Aug 1917 | U 61 | Victor Dieckmann | Campana | Steamer | 3,675 |  | am | |
| 6 Aug 1917 | U 61 | Victor Dieckmann | Jeanne Et Genevieve (d.) | Q-ship | 695 | | fr | |
| 6 Aug 1917 | U 94 | Alfred Saalwächter | Argalia | Steamer | 4,641 | | br | |
| 6 Aug 1917 | UB 22 | Karl Wacker | | Jenny | Sailing vessel | 293 |  | da |
| 6 Aug 1917 | UB 22 | Karl Wacker | Narcissus | Drifter | 58 | | br | |
| 6 Aug 1917 | UB 41 | Günther Krause | Talisman | Steamer | 153 | | br | |
| 6 Aug 1917 | UC 27 | Gerhard Schulz | El Kaddra Nr. 53 | 20 |  | tu | ||
| 6 Aug 1917 | UC 40 | Gustav Deuerlich | Polanna | Steamer | 2,345 | | br | |
| 6 Aug 1917 | UC 42 | Hans Albrecht Müller | Baysoto | Steamer | 3,082 | | br | |
| 6 Aug 1917 | UC 63 | Karsten von Heydebreck | Alfred | Sailing vessel | 107 | | fr | |
| 6 Aug 1917 | UC 63 | Karsten von Heydebreck | Fane | Steamer | 1,119 | | nw | |
| 6 Aug 1917 | UC 63 | Karsten von Heydebreck | Zamora (d.) | Steamer | 3,639 | | br | |
| 7 Aug 1917 | U 155 | Karl Meusel | Christiane | Sailing vessel | 964 | | am | |
| 7 Aug 1917 | U 155 | Karl Meusel | Iran | Steamer | 6,250 | | br | |
| 7 Aug 1917 | U 22 | Hinrich Hermann Hashagen | Jarl | steamer | 1,643 |  | sw | |
| 7 Aug 1917 | U 61 | Victor Dieckmann | Trento | Steamer | 3,276 | | it | |
| 7 Aug 1917 | UC 27 | Gerhard Schulz | Esemplare | Steamer | 999 | | it | |
| 7 Aug 1917 | UC 31 | Kurt Siewert | Othalia (d.) | Steamer | 1,205 | | sw | |
| 7 Aug 1917 | UC 44 | Kurt Tebbenjohanns | Haldon (d.) | Minesweeper | 810 | | br | |
| 7 Aug 1917 | UC 63 | Karsten von Heydebreck | Onesta | Steamer | 2,674 | | it | |
| 7 Aug 1917 | UC 71 | Reinhold Saltzwedel | Port Curtis | Steamer | 4,710 | | br | |
| 8 Aug 1917 | U 33 | Gustav Sieß | | Llanishen | Steamer | 3,837 | | br |
| 8 Aug 1917 | UB 31 | Thomas Bieber | Algerie (d.) | Steamer | 3,386 | | fr | |
| 8 Aug 1917 | UC 37 | Willy List | | Breton | Steamer | 3,739 | | fr |
| 8 Aug 1917 | UC 63 | Karsten von Heydebreck | Marie Jesus Protegez Nous | Sailing vessel | 46 | | fr | |
| 8 Aug 1917 | UC 71 | Reinhold Saltzwedel | Dunraven | Q ship | 3,117 | | br | |
| 8 Aug 1917 | UC 77 | Reinhard von Rabenau | Berlengas | Steamer | 3,548 |  | pt | |
| 9 Aug 1917 | U 100 | Degenhart von Loë | Blagdon | Steamer | 1,996 | | br | |
| 9 Aug 1917 | U 33 | Gustav Sieß | Flora | Sailing vessel | 125 | | it | |
| 9 Aug 1917 | U 33 | Gustav Sieß | Industria | Sailing vessel | 51 | | sp | |
| 9 Aug 1917 | U 55 | Wilhelm Werner | Oakfield (d.) | Steamer | 3,618 | | br | |
| 9 Aug 1917 | U 60 | Karlgeorg Schuster | Agne | Steamer | 1,010 | | sw | |
| 9 Aug 1917 | U 60 | Karlgeorg Schuster | Export | Steamer | 2,712 |  | ru | |
| 9 Aug 1917 | UB 16 | Wilhelm Rhein | Recruit | Destroyer | 1,075 | | br | |
| 9 Aug 1917 | UC 35 | Hans Paul Korsch | Alfonso | Sailing vessel | 15 | | it | |
| 9 Aug 1917 | UC 35 | Hans Paul Korsch | S. Gerlano | Sailing vessel | 11 | | it | |
| 9 Aug 1917 | UC 53 | Kurt Albrecht | Canara (d.) | Steamer | 6,012 | | br | |
| 10 Aug 1917 | U 62 | Ernst Hashagen | Orion I | Auxiliary motor | 322 | | nw | |
| 10 Aug 1917 | U 75 | Fritz Schmolling | Solglimt | Sailing vessel | 1,037 | | nw | |
| 10 Aug 1917 | U 86 | Alfred Götze | Capella I | Steamer | 3,990 | | nw | |
| 10 Aug 1917 | k.u.k. U31 | Franz Nejebsy | Lealta | Steamer | 4,021 | | it | |
| 10 Aug 1917 | UC 53 | Kurt Albrecht | Margherita | Sailing vessel | 65 | | it | |
| 10 Aug 1917 | UC 53 | Kurt Albrecht | Tito Speri | Steamer | 3,893 | | it | |
| 10 Aug 1917 | UC 69 | Erwin Waßner | War Patrol | Steamer | 2,045 | | br | |
| 11 Aug 1917 | UB 35 | Karl Stöter | Jay | Navy Trawler | 144 | | br | |
| 11 Aug 1917 | UC 31 | Kurt Siewert | | Holar | Steamer | 548 | | da |
| 11 Aug 1917 | UC 51 | Hans Galster | Gloriosa | Fishing vessel (smack) | 23 | | br | |
| 11 Aug 1917 | UC 77 | Reinhard von Rabenau | Sonnie | Steamer | 2,642 | | br | |
| 12 Aug 1917 | U 55 | Wilhelm Werner | Falkland | Steamer | 4,877 | | nw | |
| 12 Aug 1917 | U 84 | Walter Roehr | Ursus Minor | Sailing vessel | 623 | | nw | |
| 12 Aug 1917 | U 93 | Helmut Gerlach | Bestum | Steamer | 3,520 | | nw | |
| 12 Aug 1917 | U 94 | Alfred Saalwächter | Lynorta | Steamer | 3,684 | | br | |
| 12 Aug 1917 | UB 40 | Hans Howaldt | Marie Alfred | Sailing vessel | 159 | | fr | |
| 12 Aug 1917 | UB 40 | Hans Howaldt | Pauline Louisa | Sailing vessel | 172 | | fr | |
| 12 Aug 1917 | UB 48 | Wolfgang Steinbauer | Roanoke | Steamer | 4,803 | | br | |
| 12 Aug 1917 | UC 31 | Kurt Siewert | | Bogatyr | Steamer | 1,360 | | da |
| 12 Aug 1917 | UC 51 | Hans Galster | Eleazar | Fishing vessel | 111 | | br | |
| 12 Aug 1917 | UC 53 | Kurt Albrecht | Ansedonia | Sailing vessel | 270 | | it | |
| 12 Aug 1917 | UC 53 | Kurt Albrecht | Ardita Carrara | Sailing vessel | 75 | | it | |
| 12 Aug 1917 | UC 78 | Hans Kukat | Leitenant Burakov | Dispatch vessel | 350 | | ru | |
| 13 Aug 1917 | U 79 | Otto Rohrbeck | Camito (d.) | Steamer | 6,611 | | br | |
| 13 Aug 1917 | U 84 | Walter Roehr | Bergamot | Sloop | 1,290 | | br | |
| 13 Aug 1917 | U 86 | Alfred Götze | Turakina | Passenger steamer | 9,920 | | br | |
| 13 Aug 1917 | k.u.k. U28 | Zdenko Hudecek | Maston | Steamer | 3,881 | | br | |
| 13 Aug 1917 | UC 33 | Alfred Arnold | Akassa | Passenger steamer | 3,919 | | br | |
| 13 Aug 1917 | UC 53 | Kurt Albrecht | Arcangelo Michele | Sailing vessel | 44 | | it | |
| 13 Aug 1917 | UC 53 | Kurt Albrecht | Il Nuovo Leonardo | 34 | | it | ||
| 13 Aug 1917 | UC 79 | Erich Haecker | Emilie Galline | Sailing vessel | 1,944 | | fr | |
| 14 Aug 1917 | U 71 | Walter Gude | Majorka | Sailing vessel | 1,684 | | nw | |
| 14 Aug 1917 | U 93 | Helmut Gerlach | Asti | Asti | 5,300 | | it | |
| 14 Aug 1917 | UB 40 | Hans Howaldt | Tuddal | Steamer | 3,511 | | nw | |
| 14 Aug 1917 | UB 48 | Wolfgang Steinbauer | Prize | Q ship | 199 | | br | |
| 14 Aug 1917 | UC 22 | Erich Wiesenbach | Julita | Sailing vessel | 641 | | sp | |
| 14 Aug 1917 | UC 35 | Hans Paul Korsch | Umberto I | Armed merchant cruiser | 2,766 | | it | |
| 14 Aug 1917 | UC 42 | Hans Albrecht Müller | Jane S. | Fishing vessel | 12 | | br | |
| 14 Aug 1917 | UC 51 | Hans Galster | N. Verberckmoens | Steamer | 1,353 | | fr | |
| 14 Aug 1917 | UC 51 | Hans Galster | Wisbech | Steamer | 1,282 | | br | |
| 14 Aug 1917 | UC 63 | Karsten von Heydebreck | Costanza | steamer | 2,545 | | it | |
| 14 Aug 1917 | UC 63 | Karsten von Heydebreck | Luna (d.) | Steamer | 959 | | nw | |
| 14 Aug 1917 | UC 63 | Karsten von Heydebreck | Thames | Steamer | 403 | | br | |
| 14 Aug 1917 | UC 67 | Karl Neumann | Eugenia | Steamer | 3,029 |  | gr | |
| 15 Aug 1917 | U 33 | Gustav Sieß | Bandai Maru | Steamer | 3,227 |  | jp | |
| 15 Aug 1917 | U 62 | Ernst Hashagen | Albertha | Sailing vessel | 170 | | da | |
| 15 Aug 1917 | U 80 | Gustav Amberger | Hylas | Steamer | 4,240 | | br | |
| 15 Aug 1917 | UB 40 | Hans Howaldt | Brodstone | Steamer | 4,927 | | br | |
| 15 Aug 1917 | UC 21 | Werner von Zerboni di Sposetti | Phoebe | Steamer | 3,956 | | fr | |
| 15 Aug 1917 | UC 63 | Karsten von Heydebreck | Alice | Fishing vessel | 25 | | br | |
| 15 Aug 1917 | UC 63 | Karsten von Heydebreck | Ethel And Millie | Q ship | 58 | | br | |
| 15 Aug 1917 | UC 63 | Karsten von Heydebreck | G & E | Q ship | 61 | | br | |
| 16 Aug 1917 | U 53 | Hans Rose | Athenia | Steamer | 8,668 | | br | |
| 16 Aug 1917 | U 75 | Fritz Schmolling | Palatine | Steamer | 2,110 | | br | |
| 16 Aug 1917 | U 80 | Gustav Amberger | Caroline Kock | Sailing vessel | 316 | | da | |
| 16 Aug 1917 | U 94 | Alfred Saalwächter | | Svanholm | Steamer | 1,400 | | da |
| 16 Aug 1917 | k.u.k. U28 | Zdenko Hudecek | Bradford City | Q ship | 3,683 | | br | |
| 16 Aug 1917 | UB 40 | Hans Howaldt | | Eastgate (d.) | Steamer | 4,277 | | br |
| 16 Aug 1917 | UC 16 | Georg Reimarus | | Manchester Engineer | Steamer | 4,465 | | br |
| 16 Aug 1917 | UC 72 | Ernst Voigt | Delphic | Steamer | 8,273 | | br | |
| 17 Aug 1917 | U 00 | Acor | Sailing vessel | 183 | | pt | ||
| 17 Aug 1917 | U 55 | Wilhelm Werner | Edina | Steamer | 455 | | br | |
| 17 Aug 1917 | UC 16 | Georg Reimarus | Susie | Fishing vessel (smack) | 41 | | br | |
| 17 Aug 1917 | UC 21 | Werner von Zerboni di Sposetti | Pontoporos | Steamer | 4,049 | | gr | |
| 17 Aug 1917 | UC 35 | Hans Paul Korsch | Lorenzina Aiello | Sailing vessel | 120 | | it | |
| 17 Aug 1917 | UC 35 | Hans Paul Korsch | San Rossore (d.) | Steamer | 5,601 | | it | |
| 17 Aug 1917 | UC 64 | Ernst Müller-Schwarz | Esperance | Trawler | 97 | | fr | |
| 17 Aug 1917 | UC 67 | Karl Neumann | Madeleine Iii (d.) | Q-ship | 149 | | fr | |
| 17 Aug 1917 | UC 72 | Ernst Voigt | Meuse Ii | Tanker | 5,270 | | fr | |
| 18 Aug 1917 | U 55 | Wilhelm Werner | Benjamin Stevenson | Navy Trawler | 255 | | br | |
| 18 Aug 1917 | UB 48 | Wolfgang Steinbauer | Kongsli | Steamer | 5,826 | | nw | |
| 18 Aug 1917 | UC 16 | Georg Reimarus | Ardens | Steamer | 1,274 | | br | |
| 18 Aug 1917 | UC 48 | Kurt Ramien | Dunkerquois | Steamer | 2,087 | | fr | |
| 18 Aug 1917 | UC 67 | Karl Neumann | Politania | Steamer | 3,133 | | br | |
| 19 Aug 1917 | U 87 | Rudolf Schneider | Eika Ii | Steamer | 1,268 | | nw | |
| 19 Aug 1917 | k.u.k. U40 | Johann Krsnjavi | Gartness | Steamer | 2,422 | | br | |
| 19 Aug 1917 | UB 40 | Hans Howaldt | Glocliffe | Steamer | 2,211 | | br | |
| 19 Aug 1917 | UC 17 | Ulrich Pilzecker | Brema | Steamer | 1,537 | | br | |
| 19 Aug 1917 | UC 21 | Werner von Zerboni di Sposetti | Therese Et Marie | Steamer | 1,615 | | fr | |
| 19 Aug 1917 | UC 33 | Alfred Arnold | Spectator | Steamer | 3,808 | | br | |
| 19 Aug 1917 | UC 48 | Kurt Ramien | Monksgarth | Steamer | 1,928 | | br | |
| 19 Aug 1917 | UC 48 | Kurt Ramien | Ytterøy | Steamer | 1,112 | | nw | |
| 19 Aug 1917 | UC 55 | Horst Rühle von Lilienstern | Rosario | Steamer | 1,821 | | br | |
| 19 Aug 1917 | UC 65 | Max Viebeg | General Du Temple | Dredger | 585 | | fr | |
| 19 Aug 1917 | UC 72 | Ernst Voigt | Penshurst (d.) | Q ship | 1,191 | | br | |
| 19 Aug 1917 | UC 74 | Wilhelm Marschall | Aghios Georgios | Sailing vessel | 161 | | gr | |
| 20 Aug 1917 | Ladysmith (d.) | Navy Trawler | 254 | | br | |||
| 20 Aug 1917 | U 38 | Max Valentiner | Incemore | Steamer | 3,060 | | br | |
| 20 Aug 1917 | U 52 | Hans Walther | Bulysses | Tanker | 6,127 | | br | |
| 20 Aug 1917 | U 80 | Alfred von Glasenapp | Kirkland | Navy Trawler | 224 | | br | |
| 20 Aug 1917 | U 93 | Helmut Gerlach | Elswick Lodge | Steamer | 3,558 | | br | |
| 20 Aug 1917 | UB 10 | Fritz Gregor | Edernian | Steamer | 3,588 | | br | |
| 20 Aug 1917 | UB 38 | Wilhelm Amberger | Claverley | Steamer | 3,829 | | br | |
| 20 Aug 1917 | UB 48 | Wolfgang Steinbauer | Serra Do Marao | Trawler | 74 | | pt | |
| 20 Aug 1917 | UB 48 | Wolfgang Steinbauer | Serra Do Pilar | Trawler | 65 | | pt | |
| 20 Aug 1917 | UB 54 | Egon von Werner | Vala | Q ship | 1,016 | | br | |
| 20 Aug 1917 | UC 59 | Herbert Lefholz | Ilja Muromets | Auxiliary minesweeper | 207 | | ru | |
| 21 Aug 1917 | Republique | Fishing vessel | 55 | | fr | |||
| 21 Aug 1917 | U 102 | Ernst Killmann | | Virginian (d.) | Armed merchant cruiser | 10,757 | | br |
| 21 Aug 1917 | U 53 | Hans Rose | | Devonian | Passenger steamer | 10,435 | | br |
| 21 Aug 1917 | U 53 | Hans Rose | Roscommon | Steamer | 8,238 | | br | |
| 21 Aug 1917 | U 87 | Rudolf Schneider | Oslo | Steamer | 2,296 | | br | |
| 21 Aug 1917 | U 93 | Helmut Gerlach | Volodia | Steamer | 5,689 | | br | |
| 21 Aug 1917 | UC 17 | Ulrich Pilzecker | Norhilda | Steamer | 1,175 | | br | |
| 21 Aug 1917 | UC 67 | Karl Neumann | Goodwood | Steamer | 3,086 | | br | |
| 21 Aug 1917 | UC 72 | Ernst Voigt | HS 4 | Tug | 121 | | br | |
| 21 Aug 1917 | UC 72 | Ernst Voigt | RB 6 | Barge | 800 | | br | |
| 22 Aug 1917 | U 53 | Hans Rose | Verdi | Steamer | 7,120 | | br | |
| 22 Aug 1917 | U 87 | Rudolf Schneider | Alexander Shukoff | Steamer | 1,652 | | da | |
| 22 Aug 1917 | UC 22 | Erich Wiesenbach | Golo Ii | Armed boarding steamer | 1,380 | | fr | |
| 22 Aug 1917 | UC 41 | Hans Förste | Sophron | Navy Trawler | 195 | | br | |
| 22 Aug 1917 | UC 47 | Paul Hundius | Gro | Steamer | 2,667 | | nw | |
| 23 Aug 1917 | U 53 | Hans Rose | Boniface | Steamer | 3,799 | | br | |
| 23 Aug 1917 | U 93 | Helmut Gerlach | Carl F. Cressy | Sailing vessel | 898 | | am | |
| 23 Aug 1917 | k.u.k. U14 | Georg Ritter von Trapp | Constance | Steamer | 2,469 | | fr | |
| 23 Aug 1917 | UB 48 | Wolfgang Steinbauer | Winlaton | Steamer | 3,270 | | br | |
| 23 Aug 1917 | UC 47 | Paul Hundius | Peer Gynt | Steamer | 1,144 | | nw | |
| 23 Aug 1917 | UC 47 | Paul Hundius | Veghtstroom | Steamer | 1,353 | | br | |
| 23 Aug 1917 | UC 67 | Karl Neumann | Fratelli Danieli | Sailing vessel | 94 | | fr | |
| 24 Aug 1917 | U 62 | Ernst Hashagen | Henriette | Steamer | 2,005 | | fr | |
| 24 Aug 1917 | k.u.k. U14 | Georg Ritter von Trapp | Kilwinning | Steamer | 3,071 | | br | |
| 24 Aug 1917 | UB 21 | Franz Walther | Springhill | Steamer | 1,507 | | br | |
| 24 Aug 1917 | UC 74 | Wilhelm Marschall | Parana | Passenger steamer | 6,248 | | fr | |
| 25 Aug 1917 | U 70 | Otto Wünsche | | Malda | Passenger steamer | 7,896 | | br |
| 25 Aug 1917 | U 80 | Gustav Amberger | Junona | Steamer | 3,462 | | ru | |
| 25 Aug 1917 | U 93 | Helmut Gerlach | Heatherside | Steamer | 2,767 | | br | |
| 25 Aug 1917 | U 93 | Helmut Gerlach | Ovar | Steamer | 1,650 | | pt | |
| 25 Aug 1917 | UB 54 | Egon von Werner | Frigga | Steamer | 1,046 | | nw | |
| 25 Aug 1917 | UB 61 | Theodor Schultz | Sycamore | Steamer | 6,550 | | br | |
| 25 Aug 1917 | UC 49 | Karl Petri | Nascent | Steamer | 4,969 | | br | |
| 25 Aug 1917 | UC 65 | Max Viebeg | Garm | Steamer | 725 | | nw | |
| 25 Aug 1917 | UC 65 | Max Viebeg | | Nerma | Steamer | 689 | | da |
| 25 Aug 1917 | UC 75 | Johannes Lohs | Cymrian | Steamer | 1,014 | | br | |
| 26 Aug 1917 | U 53 | Hans Rose | Durango | Steamer | 3,008 | | br | |
| 26 Aug 1917 | U 53 | Hans Rose | Kenmore | Steamer | 3,919 | | br | |
| 26 Aug 1917 | U 93 | Helmut Gerlach | Marmion | Steamer | 4,066 | | br | |
| 26 Aug 1917 | U 93 | Helmut Gerlach | Minas Queen | Sailing vessel | 492 |  | ca | |
| 26 Aug 1917 | k.u.k. U14 | Georg Ritter von Trapp | Titian | Steamer | 4,170 | | br | |
| 26 Aug 1917 | UB 32 | Benno von Ditfurth | Feltre | Steamer | 6,455 | | it | |
| 26 Aug 1917 | UB 38 | Wilhelm Amberger | W. H. Dwyer | Steamer | 1,770 | | ca | |
| 26 Aug 1917 | UB 61 | Theodor Schultz | Assyria | Steamer | 6,370 | | br | |
| 26 Aug 1917 | UC 20 | Hans Adalbert von der Lühe | Maurizio P. | steamer | 558 | | it | |
| 26 Aug 1917 | UC 35 | Hans Paul Korsch | Maria Del Carmine | Sailing vessel | 108 | | it | |
| 26 Aug 1917 | UC 47 | Paul Hundius | Eirini | Steamer | 2,452 | | gr | |
| 26 Aug 1917 | UC 47 | Paul Hundius | Seresia (d.) | Steamer | 2,342 |  | be | |
| 26 Aug 1917 | UC 62 | Max Schmitz | Chacma | Sailing vessel | 608 | | nw | |
| 27 Aug 1917 | U 87 | Rudolf Schneider | | Anna | Steamer | 1,211 | | da |
| 27 Aug 1917 | U 87 | Rudolf Schneider | | Aurora | Steamer | 768 | | da |
| 27 Aug 1917 | UB 48 | Wolfgang Steinbauer | Hathor | Steamer | 3,823 | | br | |
| 28 Aug 1917 | Evangelistria | Sailing vessel | unknown | | gr | |||
| 28 Aug 1917 | U 28 | Georg Schmidt | Hidalgo | Steamer | 4,271 | | br | |
| 28 Aug 1917 | U 28 | Georg Schmidt | Marselieza | Steamer | 3,568 | | ru | |
| 28 Aug 1917 | U 28 | Georg Schmidt | Whitecourt | Steamer | 3,680 | | br | |
| 28 Aug 1917 | k.u.k. U14 | Georg Ritter von Trapp | Nairn | Steamer | 3,627 | | br | |
| 28 Aug 1917 | UC 38 | Hans Hermann Wendlandt | Pasqualino Carmela | Sailing vessel | 61 | | it | |
| 28 Aug 1917 | UC 38 | Hans Hermann Wendlandt | Scilla | Ferry | 397 | | it | |
| 28 Aug 1917 | UC 73 | Kurt Schapler | | Saint Joseph (d.) | Steamer | 5,796 | | fr |
| 29 Aug 1917 | U 93 | Helmut Gerlach | Treloske | Steamer | 3,071 | | br | |
| 29 Aug 1917 | k.u.k. U14 | Georg Ritter von Trapp | | Milazzo | Steamer | 11,477 | | it |
| 29 Aug 1917 | k.u.k. U40 | Johann Krsnjavi | Clifftower (d.) | Steamer | 3,509 | | br | |
| 29 Aug 1917 | UC 38 | Hans Hermann Wendlandt | Vronwen | Steamer | 5,714 | | br | |
| 29 Aug 1917 | UC 65 | Max Viebeg | Laura C. Anderson | Sailing vessel | 960 | | am | |
| 29 Aug 1917 | UC 75 | Johannes Lohs | Cooroy | Sailing vessel | 2,470 | | br | |
| 29 Aug 1917 | UC 75 | Johannes Lohs | Lynburn | Steamer | 587 | | br | |
| 30 Aug 1917 | U 62 | Ernst Hashagen | Eastern Prince | Steamer | 2,885 | | br | |
| 30 Aug 1917 | U 62 | Ernst Hashagen | Grelhame | Steamer | 3,740 | | br | |
| 30 Aug 1917 | U 62 | Ernst Hashagen | Noya | Steamer | 4,282 | | br | |
| 30 Aug 1917 | UC 74 | Wilhelm Marschall | Athinai | Steamer | 988 | | gr | |
| 31 Aug 1917 | U 19 | Johannes Spieß | Miniota | Steamer | 6,422 | | br | |
| 31 Aug 1917 | U 48 | Karl Edeling | Westbury | Steamer | 3,097 | | br | |
| 31 Aug 1917 | U 71 | Walter Gude | Taurus | Taurus | 128 | | br | |
| 31 Aug 1917 | UB 30 | Wilhelm Rhein | Vernon | Steamer | 982 | | br | |
| 31 Aug 1917 | UC 21 | Reinhold Saltzwedel | Marques De Mudela | Steamer | 1,930 | | sp | |
| 31 Aug 1917 | UC 65 | Max Viebeg | Erissos (d.) | Steamer | 2,885 | | gr | |
| 31 Aug 1917 | UC 74 | Wilhelm Marschall | Eleni | steamer | 679 | | gr | |
| 593,786 | ||||||||
| 221 ships sunk (523,847 tons) and 21 ships damaged (69,939 tons).
| ||||||||