This is the full listing of all ships hit during December 1917. You can click on any of the links for further information on either ship, U-boat, commander or convoy.
| Date | U-boat | Commander | | Name of ship | Tons | Nat. |
| |
| 1 Dec 1917 | U 53 | Hans Rose | | Helenus (d.) | 7,555 |  | br |
| 1 Dec 1917 | U 65 | Hermann von Fischel | | Citta Di Sassari | 2,167 |  | it |
| 1 Dec 1917 | U 84 | Walter Roehr | | Antonios Stathatos | 2,743 |  | gr |
| 1 Dec 1917 | UB 35 | Karl Stöter | | Rion | 50 |  | br |
| 1 Dec 1917 | UC 67 | Karl Neumann | | Phoebus | unknown |  | fr |
| 1 Dec 1917 | UC 75 | Johannes Lohs | | Euphorbia | 3,109 |  | br |
| 1 Dec 1917 | UC 75 | Johannes Lohs | | Rydal Hall | 3,314 |  | br |
| 2 Dec 1917 | | | | Kintuck | 4,639 |  | br |
| 2 Dec 1917 | U 34 | Johannes Klasing | | Berwick Law | 4,680 |  | br |
| 2 Dec 1917 | U 34 | Johannes Klasing | | Minas | 2,506 |  | gr |
| 2 Dec 1917 | U 65 | Hermann von Fischel | | Carlino | 94 |  | it |
| 2 Dec 1917 | U 65 | Hermann von Fischel | | La Margherita | 41 |  | it |
| 2 Dec 1917 | U 65 | Hermann von Fischel | | San Antonio Il Vittorioso | 45 |  | it |
| 2 Dec 1917 | U 84 | Walter Roehr | | Birchgrove | 2,821 |  | br |
| 2 Dec 1917 | UC 17 | Ulrich Pilzecker | | Tasmania | 2,089 |  | ru |
| 2 Dec 1917 | UC 67 | Karl Neumann | | La Rance | 2,610 |  | fr |
| 3 Dec 1917 | | | | Henriques | 237 |  | pt |
| 3 Dec 1917 | U 57 | Carl-Siegfried Ritter von Georg | | Copeland | 1,184 |  | br |
| 3 Dec 1917 | UB 35 | Karl Stöter | | Livonia | 1,879 |  | br |
| 3 Dec 1917 | UB 35 | Karl Stöter | | Wreathier | 852 |  | br |
| 3 Dec 1917 | UC 25 | Johannes Feldkirchner | | Melo | 1,115 |  | it |
| 3 Dec 1917 | UC 67 | Karl Neumann | | Carmen | 5,479 |  | it |
| 4 Dec 1917 | | | | Claudio (d.) | 2,588 |  | sp |
| 4 Dec 1917 | UB 35 | Karl Stöter | | Eagle | 182 |  | br |
| 4 Dec 1917 | UB 35 | Karl Stöter | | Helge | 343 |  | sw |
| 4 Dec 1917 | UB 48 | Wolfgang Steinbauer | | Dowlais | 3,016 |  | br |
| 4 Dec 1917 | UB 48 | Wolfgang Steinbauer | | Gerasimos | 3,845 |  | gr |
| 4 Dec 1917 | UB 80 | Max Viebeg | | Vav | 1,255 |  | nw |
| 4 Dec 1917 | UC 17 | Ulrich Pilzecker | | Forfar | 3,827 |  | br |
| 4 Dec 1917 | UC 35 | Hans Paul Korsch | | Alberto Verderame | 195 |  | it |
| 4 Dec 1917 | UC 63 | Karsten von Heydebreck | | Brigitta | 2,084 |  | br |
| 4 Dec 1917 | UC 64 | Erich Hecht | | Manchester Mariner (d.) | 4,106 |  | br |
| 4 Dec 1917 | UC 75 | Johannes Lohs | | Milton (d.) | 3,267 |  | br |
| 5 Dec 1917 | U 53 | Hans Rose | | Earlswood (d.) | 2,353 |  | br |
| 5 Dec 1917 | UB 59 | Erwin Waßner | | City Of Naples (d.) | 5,739 |  | br |
| 5 Dec 1917 | UB 75 | Franz Walther | | Aigburth | 824 |  | br |
| 5 Dec 1917 | UB 80 | Max Viebeg | | Armenia (d.) | 5,463 |  | am |
| 5 Dec 1917 | UC 67 | Karl Neumann | | Greenwich | 2,938 |  | br |
| 6 Dec 1917 | U 34 | Johannes Klasing | | Ilvington Court | 4,217 |  | br |
| 6 Dec 1917 | U 53 | Hans Rose | | Jacob Jones | 1,050 |  | am |
| 6 Dec 1917 | U 57 | Carl-Siegfried Ritter von Georg | | Saint Antoine De Padoue (d.) | 355 |  | fr |
| 6 Dec 1917 | UB 75 | Franz Walther | | Leda | 1,140 |  | nl |
| 6 Dec 1917 | UC 17 | Ulrich Pilzecker | | Asaba | 972 |  | br |
| 6 Dec 1917 | UC 38 | Hans Hermann Wendlandt | | Tubereuse | 183 |  | fr |
| 6 Dec 1917 | UC 71 | Ernst Steindorff | | Apley | 222 |  | br |
| 6 Dec 1917 | UC 71 | Ernst Steindorff | | Braeside | 569 |  | br |
| 6 Dec 1917 | UC 71 | Ernst Steindorff | | Wyndhurst | 570 |  | br |
| 7 Dec 1917 | U 156 | Konrad Gansser | | W.c. Mc Kay | 147 |  | ca |
| 7 Dec 1917 | UB 55 | Ralph Wenninger | | Proba | 105 |  | br |
| 7 Dec 1917 | UB 75 | Franz Walther | | Highgate | 1,780 |  | br |
| 7 Dec 1917 | UC 75 | Johannes Lohs | | Earl Of Elgin | 4,448 |  | br |
| 8 Dec 1917 | UB 18 | Georg Niemeyer | | Nonni | 4,105 |  | ru |
| 8 Dec 1917 | UB 48 | Wolfgang Steinbauer | | Consols | 3,756 |  | br |
| 8 Dec 1917 | UB 55 | Ralph Wenninger | | Corinto | 999 |  | nw |
| 8 Dec 1917 | UB 75 | Franz Walther | | Lampada | 2,230 |  | br |
| 8 Dec 1917 | UC 25 | Walter Lippold | | Chyebassa (d.) | 6,249 |  | br |
| 8 Dec 1917 | UC 40 | Hermann Menzel | | Grive | 2,037 |  | br |
| 8 Dec 1917 | UC 49 | Hans Kükenthal | | Maindy Bridge | 3,653 |  | br |
| 8 Dec 1917 | UC 53 | Kurt Albrecht | | Giuseppe Naccari | 128 |  | it |
| 8 Dec 1917 | UC 67 | Karl Neumann | | La Vittoria | 53 |  | it |
| 9 Dec 1917 | U 53 | Hans Rose | | Nyanza (d.) | 6,695 |  | br |
| 9 Dec 1917 | U 53 | Hans Rose | | War Tune | 2,045 |  | br |
| 9 Dec 1917 | U 64 | Robert Moraht | | Adour | 1,940 |  | nw |
| 9 Dec 1917 | UB 40 | Hans Howaldt | | Sedbergh (d.) | 4,275 |  | br |
| 9 Dec 1917 | UB 75 | Franz Walther | | Venetia | 3,596 |  | br |
| 9 Dec 1917 | UC 53 | Kurt Albrecht | | Cerea (d.) | 4,295 |  | it |
| 9 Dec 1917 | UC 53 | Kurt Albrecht | | Costas | 3,278 |  | gr |
| 10 Dec 1917 | U 53 | Hans Rose | | Øiekast | 605 |  | nw |
| 10 Dec 1917 | U 64 | Robert Moraht | | Crathorne | 2,619 |  | nw |
| 10 Dec 1917 | U 64 | Robert Moraht | | Owasco | 4,630 |  | am |
| 10 Dec 1917 | U 75 | Fritz Schmolling | | Aureole (d.) | 3,998 |  | br |
| 10 Dec 1917 | UB 17 | Johannes Ries | | Forward | 40 |  | br |
| 11 Dec 1917 | U 35 | Lothar von Arnauld de la Perière | | Persier | 3,874 |  | br |
| 11 Dec 1917 | U 60 | Franz Grünert | | Bard | 709 |  | nw |
| 11 Dec 1917 | U 62 | Ernst Hashagen | | Oldfield Grange | 4,653 |  | br |
| 11 Dec 1917 | U 64 | Robert Moraht | | D. A. Gordon | 2,301 |  | br |
| 11 Dec 1917 | U 64 | Robert Moraht | | Minorca | 1,145 |  | br |
| 11 Dec 1917 | UB 55 | Ralph Wenninger | | Argus | 100 |  | pt |
| 11 Dec 1917 | UB 55 | Ralph Wenninger | | Ligeiro | 25 |  | pt |
| 11 Dec 1917 | UB 55 | Ralph Wenninger | | Portuguesa | 107 |  | pt |
| 11 Dec 1917 | UB 55 | Ralph Wenninger | | Vigneira Or Virgeira | 25 |  | pt |
| 12 Dec 1917 | U 34 | Johannes Klasing | | Emanuele C. | 284 |  | it |
| 12 Dec 1917 | U 60 | Franz Grünert | | St. Croix | 2,530 |  | nw |
| 12 Dec 1917 | U 71 | Otto Dröscher | | Amadavat | 171 |  | br |
| 12 Dec 1917 | UB 65 | Martin Schelle | | Bellville | 992 |  | sw |
| 12 Dec 1917 | UB 65 | Martin Schelle | | Charleston | 1,866 |  | br |
| 12 Dec 1917 | UC 40 | Hermann Menzel | | Leonatus | 2,099 |  | br |
| 12 Dec 1917 | UC 50 | Rudolf Seuffer | | Emlyndene | 495 |  | br |
| 12 Dec 1917 | UC 53 | Kurt Albrecht | | Antonio Magliulo | 520 |  | it |
| 12 Dec 1917 | UC 53 | Kurt Albrecht | | Karen | 1,689 |  | nw |
| 13 Dec 1917 | U 102 | Curt Beitzen | | Noviembre | 3,500 |  | sp |
| 13 Dec 1917 | U 78 | Otto Dröscher | | Arnewood | 2,259 |  | br |
| 13 Dec 1917 | U 87 | Rudolf von Speth-Schülzburg | | Little Gem | 114 |  | br |
| 13 Dec 1917 | UB 22 | Karl Wacker | | Garthwaite | 5,690 |  | br |
| 13 Dec 1917 | UB 31 | Thomas Bieber | | Britannic | 92 |  | br |
| 13 Dec 1917 | UB 34 | Hellmuth von Ruckteschell | | Bangarth | 1,872 |  | br |
| 13 Dec 1917 | UB 38 | Waldemar von Fischer | | Ottokar | 957 |  | br |
| 13 Dec 1917 | UB 54 | Egon von Werner | | Chili | 1,318 |  | fr |
| 13 Dec 1917 | UB 64 | Ernst Krieger | | Stephen Furness | 1,712 |  | br |
| 14 Dec 1917 | U 62 | Ernst Hashagen | | Hare | 774 |  | br |
| 14 Dec 1917 | U 64 | Robert Moraht | | Coila | 4,135 |  | br |
| 14 Dec 1917 | UB 65 | Martin Schelle | | Nor | 1,418 |  | nw |
| 14 Dec 1917 | UC 38 | Hans Hermann Wendlandt | | Chateaurenault | 8,018 |  | fr |
| 14 Dec 1917 | UC 64 | Erich Hecht | | Volnay | 4,610 |  | br |
| 15 Dec 1917 | U 104 | Kurt Bernis | | Maidag | 1,253 |  | nw |
| 15 Dec 1917 | U 156 | Konrad Gansser | | Ioannina | 4,567 |  | gr |
| 15 Dec 1917 | U 62 | Ernst Hashagen | | Formby | 1,282 |  | br |
| 15 Dec 1917 | U 86 | Alfred Götze | | Baron Leopold Davillier (d.) | 163 |  | fr |
| 15 Dec 1917 | U 94 | Alfred Saalwächter | | Bernard | 3,682 |  | br |
| 15 Dec 1917 | UB 31 | Thomas Bieber | | Sachem (d.) | 5,354 |  | br |
| 15 Dec 1917 | UB 34 | Hellmuth von Ruckteschell | | Dafni | 1,190 |  | gr |
| 16 Dec 1917 | U 94 | Alfred Saalwächter | | Bristol City | 2,511 |  | br |
| 16 Dec 1917 | UB 49 | Hans von Mellenthin | | New York | 442 |  | it |
| 16 Dec 1917 | UB 49 | Hans von Mellenthin | | San Francesco Di Paola | 51 |  | it |
| 16 Dec 1917 | UB 55 | Ralph Wenninger | | Foylemore | 3,831 |  | br |
| 16 Dec 1917 | UB 65 | Martin Schelle | | Arbutus | 1,290 |  | br |
| 17 Dec 1917 | U 156 | Konrad Gansser | | Acoriano | 312 |  | pt |
| 17 Dec 1917 | U 62 | Ernst Hashagen | | Coningbeg | 1,279 |  | br |
| 17 Dec 1917 | U 80 | Karl Scherb | | Neptune | 50 |  | br |
| 17 Dec 1917 | UB 53 | Robert Sprenger | | Nina | 126 |  | gr |
| 18 Dec 1917 | U 87 | Rudolf von Speth-Schülzburg | | Charles | 56 |  | br |
| 18 Dec 1917 | UB 31 | Thomas Bieber | | Riversdale | 2,805 |  | br |
| 18 Dec 1917 | UB 49 | Hans von Mellenthin | | Guilo S | 151 |  | it |
| 19 Dec 1917 | U 105 | Friedrich Strackerjan | | Vinovia | 7,046 |  | br |
| 19 Dec 1917 | U 60 | Franz Grünert | | Ingrid Ii | 1,145 |  | nw |
| 19 Dec 1917 | U 80 | Karl Scherb | | Arno | 1,386 |  | da |
| 19 Dec 1917 | UB 50 | Franz Becker | | S. Giuseppe B. | 96 |  | it |
| 19 Dec 1917 | UB 58 | Werner Fürbringer | | Saint Andre | 2,457 |  | fr |
| 19 Dec 1917 | UC 64 | Erich Hecht | | Borgsten | 1,718 |  | nw |
| 19 Dec 1917 | UC 64 | Erich Hecht | | Trevelyan (d.) | 3,066 |  | br |
| 20 Dec 1917 | U 35 | Lothar von Arnauld de la Perière | | Fiscus | 4,782 |  | br |
| 20 Dec 1917 | U 35 | Lothar von Arnauld de la Perière | | Waverley | 3,853 |  | br |
| 20 Dec 1917 | U 86 | Alfred Götze | | Polvarth | 3,146 |  | br |
| 20 Dec 1917 | UB 31 | Thomas Bieber | | Alice Marie | 2,210 |  | br |
| 20 Dec 1917 | UB 31 | Thomas Bieber | | Eveline | 2,605 |  | br |
| 20 Dec 1917 | UB 31 | Thomas Bieber | | Warsaw | 608 |  | br |
| 20 Dec 1917 | UB 49 | Hans von Mellenthin | | Attualita | 4,791 |  | it |
| 20 Dec 1917 | UB 49 | Hans von Mellenthin | | Regin | 1,845 |  | nw |
| 20 Dec 1917 | UB 49 | Hans von Mellenthin | | Suruga (d.) | 4,374 |  | am |
| 20 Dec 1917 | UB 54 | Egon von Werner | | Noris | 583 |  | nw |
| 21 Dec 1917 | U 104 | Kurt Bernis | | Spro | 1,507 |  | nw |
| 21 Dec 1917 | U 89 | August Mildenberger | | Boa Vista | 3,667 |  | pt |
| 21 Dec 1917 | UB 49 | Hans von Mellenthin | | Monte Bianco (d.) | 6,968 |  | it |
| 21 Dec 1917 | UB 49 | Hans von Mellenthin | | Stromboli | 5,356 |  | it |
| 21 Dec 1917 | UB 50 | Franz Becker | | City Of Lucknow | 8,293 |  | br |
| 21 Dec 1917 | UB 54 | Egon von Werner | | Orne | 928 |  | fr |
| 22 Dec 1917 | U 105 | Friedrich Strackerjan | | Colemere | 2,120 |  | br |
| 22 Dec 1917 | U 60 | Franz Grünert | | Hunsbrook (d.) | 4,463 |  | br |
| 22 Dec 1917 | UB 49 | Hans von Mellenthin | | Piemonte (d.) | 2,395 |  | it |
| 22 Dec 1917 | UB 57 | Otto Steinbrinck | | Mabel Baird | 2,500 |  | br |
| 22 Dec 1917 | UB 58 | Werner Fürbringer | | Clan Cameron | 3,595 |  | br |
| 22 Dec 1917 | UB 58 | Werner Fürbringer | | Start | 728 |  | nw |
| 23 Dec 1917 | U 35 | Lothar von Arnauld de la Perière | | Pietro | 3,860 |  | it |
| 23 Dec 1917 | UB 35 | Karl Stöter | | Hilda Lea | 1,328 |  | br |
| 23 Dec 1917 | UB 49 | Hans von Mellenthin | | Caboto | 4,418 |  | it |
| 23 Dec 1917 | UB 54 | Egon von Werner | | Ragna | 1,747 |  | nw |
| 23 Dec 1917 | UB 57 | Otto Steinbrinck | | Vellore | 1,672 |  | nw |
| 23 Dec 1917 | UC 37 | Willy List | | Dunedin (d.) | 4,796 |  | br |
| 23 Dec 1917 | UC 4 | Walter Schmitz | | Grantley Hall | 4,008 |  | br |
| 23 Dec 1917 | UC 64 | Erich Hecht | | Manicia (d.) | 1,868 |  | nw |
| 24 Dec 1917 | U 105 | Friedrich Strackerjan | | Canova | 4,637 |  | br |
| 24 Dec 1917 | U 110 | Karl Kroll | | Penshurst | 1,191 |  | br |
| 24 Dec 1917 | U 35 | Lothar von Arnauld de la Perière | | Turnbridge | 2,874 |  | br |
| 24 Dec 1917 | U 87 | Rudolf von Speth-Schülzburg | | Daybreak | 3,238 |  | br |
| 24 Dec 1917 | U 91 | Alfred von Glasenapp | | Elmleaf (d.) | 5,948 |  | br |
| 24 Dec 1917 | UC 71 | Ernst Steindorff | | Luciston | 2,877 |  | br |
| 25 Dec 1917 | U 104 | Kurt Bernis | | Ajax | 1,018 |  | da |
| 25 Dec 1917 | U 35 | Lothar von Arnauld de la Perière | | Argo | 3,071 |  | br |
| 25 Dec 1917 | U 35 | Lothar von Arnauld de la Perière | | Cliftondale | 3,811 |  | br |
| 25 Dec 1917 | U 35 | Lothar von Arnauld de la Perière | | Nordpol | 2,053 |  | nw |
| 25 Dec 1917 | U 87 | Rudolf von Speth-Schülzburg | | Agberi | 4,821 |  | br |
| 25 Dec 1917 | UB 49 | Hans von Mellenthin | | Umballa | 5,310 |  | br |
| 25 Dec 1917 | UB 50 | Franz Becker | | Sant’ Antonio | 843 |  | it |
| 25 Dec 1917 | UC 53 | Kurt Albrecht | | Hekla | 937 |  | da |
| 25 Dec 1917 | UC 71 | Ernst Steindorff | | Espagne | 1,463 |  | be |
| 25 Dec 1917 | UC 71 | Ernst Steindorff | | Hyacinthus (d.) | 5,756 |  | br |
| 26 Dec 1917 | U 157 | Max Valentiner | | Lydia | 302 |  | pt |
| 26 Dec 1917 | UB 35 | Karl Stöter | | Skaala | 1,129 |  | nw |
| 26 Dec 1917 | UB 57 | Otto Steinbrinck | | Benito | 4,712 |  | br |
| 26 Dec 1917 | UB 57 | Otto Steinbrinck | | Tregenna | 5,772 |  | br |
| 27 Dec 1917 | U 100 | Degenhart von Loë | | Adela | 685 |  | br |
| 27 Dec 1917 | U 61 | Victor Dieckmann | | Santee (d.) | 2,729 |  | am |
| 27 Dec 1917 | UC 71 | Ernst Steindorff | | P. L. M. 4 | 2,640 |  | fr |
| 28 Dec 1917 | U 105 | Friedrich Strackerjan | | Lord Derby | 3,757 |  | br |
| 28 Dec 1917 | U 19 | Johannes Spieß | | Maxton | 5,094 |  | br |
| 28 Dec 1917 | U 19 | Johannes Spieß | | Santa Amalia | 4,309 |  | br |
| 28 Dec 1917 | U 43 | Waldemar Bender | | Magellan | 6,265 |  | fr |
| 28 Dec 1917 | U 91 | Alfred von Glasenapp | | Robert Eggleton | 2,274 |  | br |
| 28 Dec 1917 | UB 57 | Otto Steinbrinck | | Clara | 2,425 |  | br |
| 28 Dec 1917 | UC 71 | Ernst Steindorff | | Fallodon | 3,012 |  | br |
| 28 Dec 1917 | UC 73 | Walter Wiedemann | | Dauno | 455 |  | it |
| 28 Dec 1917 | UC 75 | Johannes Lohs | | Alfred H. Read | 457 |  | br |
| 28 Dec 1917 | UC 75 | Johannes Lohs | | Chirripo | 4,050 |  | br |
| 29 Dec 1917 | UB 21 | Walter Scheffler | | Inverness (d.) | 3,734 |  | br |
| 29 Dec 1917 | UB 21 | Walter Scheffler | | Patria | 838 |  | ru |
| 29 Dec 1917 | UB 57 | Otto Steinbrinck | | Tiro | 1,442 |  | nw |
| 29 Dec 1917 | UC 58 | Karl Vesper | | Ennismore | 1,499 |  | br |
| 30 Dec 1917 | U 110 | Karl Kroll | | Zone | 3,914 |  | br |
| 30 Dec 1917 | U 156 | Konrad Gansser | | Joaquin Mumbru | 2,703 |  | sp |
| 30 Dec 1917 | UB 21 | Walter Scheffler | | Hercules | 1,295 |  | br |
| 30 Dec 1917 | UC 34 | Horst Obermüller | | Aragon | 9,588 |  | br |
| 30 Dec 1917 | UC 34 | Horst Obermüller | | Attack | 785 |  | br |
| 31 Dec 1917 | U 71 | Otto Dröscher | | De Hoop (p.) | 140 |  | nl |
| 31 Dec 1917 | U 95 | Athalwin Prinz | | Vigrid | 1,617 |  | nw |
| 31 Dec 1917 | UB 35 | Karl Stöter | | Westville | 3,207 |  | br |
| 31 Dec 1917 | UB 53 | Robert Sprenger | | Lily | 2,993 |  | gr |
| 31 Dec 1917 | UC 34 | Horst Obermüller | | Osmanieh | 4,041 |  | br |
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| 508,306 | | | 181 ships sunk (399,754 tons) and 26 ships damaged (108,552 tons). Legend (d.) means the ship was damaged. (p.) means the ship was taken as prize (included in ships & tonnage lost).
We have a picture of this vessel.
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This map shows where Allied ships were hit during December 1917.

In some cases the exact positions of losses are not known, those are not shown.