List of shipwrecks in December 1917

The list of shipwrecks in 1917 includes some ships sunk, foundered, grounded, or otherwise lost during 1917.

1 December

 * SS Antonios Stathatos (1901) (🇬🇷 Greece): World War I: The cargo ship was sunk in the Bay of Biscay off the Île du Pilier, Vendée, France (47.08333°N, -2.6°W) by SMU U-84.
 * SS Citta di Sassari (1910) ( undefined): World War I: The passenger ship was sunk in the Tyrrhenian Sea off Cape Mele, Liguria (44.13333°N, 8.23333°W) by SMU U-65 (Germany) . Her crew survived.
 * SS Euphorbia (1917) ( undefined): World War I: The cargo ship was torpedoed and sunk in the English Channel 14 nmi east by south of the Royal Sovereign Lightship (🇬🇧 United Kingdom) by SMU UC-75 with the loss of fourteen of her crew.
 * FRENCH YACHT Phoebus : World War I: The naval yacht struck a mine and sank in the Mediterranean Sea off Cape Cepet, Var (43.16667°N, 5.33333°W).
 * Rion ( undefined): World War I: The fishing smack was scuttled in the English Channel 8 nmi north east of Start Point, Devon by SMU UB-35 . Her crew survived.
 * SS Rydal Hall (1889) ( undefined): World War I: The cargo ship was torpedoed and sunk in the English Channel 14 nmi east by south of the Royal Sovereign Lightship (🇬🇧 United Kingdom) by SMU UC-75 with the loss of 23 of her crew.
 * SMU UB-81 : World War I: The Type UB III submarine struck a mine and sank in the English Channel off Dunnose Head, Isle of Wight, United Kingdom with the loss of 29 of her 35 crew. The survivors were rescued by a Royal Navy patrol boat.
 * USS Washington (SP-1241) : The coal barge ran aground in the Ambrose Channel and was wrecked.

2 December

 * SS Berwick Law (1911) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea off Cape Ténès, Algeria by SMU U-34 (Germany) with the loss of a crew member.
 * SS Birchgrove (1894) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Bay of Biscay off Groix, Morbihan, France (47.63333°N, -3.75°W) by SMU U-84 with the loss of a crew member.
 * Carlino ( undefined): World War I: The sailing vessel was sunk in the Tyrrhenian Sea east of Corsica, France (42.13333°N, 7.45°W) by SMU U-65 (Germany).
 * La Margherita ( undefined): World War I: The sailing vessel was sunk in the Tyrrhenian Sea east of Corsica (42.18333°N, 7.33333°W) by SMU U-65 (Germany).
 * SS La Rance (1906) (🇫🇷 France): World War I: The cargo ship was torpedoed, shelled and sunk in the Mediterranean Sea off the Île de Planier, Bouches-du-Rhône (42.8°N, 5.25°W) by SMU UC-67 with the loss of four of her crew.
 * HMT Lord Grey : The naval trawler was wrecked on the La Barrier Shoal, in the English Channel off Cap Gris Nez, Pas-de-Calais, France.
 * SS Minas (1892): (🇬🇷 Greece) World War I: The cargo ship was sunk in the Mediterranean Sea off Cape Ténès by SMU U-34 (Germany) . Her crew survived.
 * SS Molesey ( undefined): The cargo ship was torpedoed and sunk in the English Channel 12 nmi south west by west of the Brighton Lightship ( undefined) by a Kaiserliche Marine submarine.
 * San Antonio Il Vittorioso ( undefined): World War I: The sailing vessel was sunk in the Tyrrhenian Sea east of Corsica (42.26667°N, 7.33333°W) by SMU U-65 (Germany).
 *  Tasmania ( undefined): World War I: The full-rigged ship was sunk in the Bay of Biscay south west of Ouessant, Finistère, France by SMU UC-17.
 * SMU UB-81 : World War I: The Type UB III submarine struck a mine and sank in the English Channel off the Isle of Wight, United Kingdom with the loss of 27 of her 34 crew.

3 December

 * SS Carmen (1914) ( undefined): World War I: The cargo ship was sunk in the Mediterranean Sea south of the Île du Planier, Bouches-du-Rhône, France (43.08333°N, 5.2°W) by SMU UC-67.
 * SS Copeland (1894) ( undefined): World War I: The cargo ship was sunk in the Atlantic Ocean 5 nmi south south west of the Tuskar Rock, Ireland (52.05°N, -6.41667°W) by SMU U-57  with the loss of twelve crew.
 * SS Livonia (1904) ( undefined): World War I: The cargo ship was torpedoed and sunk in the English Channel 4 nmi east by north of Start Point, Devon by SMU UB-35 with the loss of 23 of her crew.
 * SS Melo (1887) ( undefined): World War I: The cargo ship struck a mine and sank in the Mediterranean Sea off Cape Spartivento, Sicily with the loss of two of her crew.
 * SS Wreathier (1897) ( undefined): World War I: The coaster was torpedoed and sunk in the English Channel 1 nmi west of Prawle Point, Devon by SMU UB-35 with the loss of three of her crew.

4 December

 *  Alberto Verderame ( undefined): World War I: The brigantine was shelled and sunk in the Gulf of Genoa (39.95°N, 9.8°W) by SMU UC-35.
 * HMT Bounteous : The naval trawler was lost on this date.
 * SS Brigitta (1894) ( undefined): World War I: The cargo ship struck a mine and sank in the English Channel 6 nmi south west of the Nab Lightship ( undefined) with the loss of two of her crew.
 * SS Dowlais (1904) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea off Cape de Fer, Algeria by SMU UB-48 with the loss of 26 of her crew.
 * SS Eagle (1902) ( undefined): World War I: The coaster was scuttled in the English Channel 10 nmi south of Start Point, Devon by SMU UB-35 . Her crew survived.
 * SS Forfar (1907) ( undefined): World War I: Convoy OF 15: The cargo ship was torpedoed and sunk in the Atlantic Ocean 115 nmi south west by west of The Lizard by SMU UC-17 with the loss of three of her crew.
 * SS Gerasimos (1913) (🇬🇷 Greece): World War I: The cargo ship was sunk in the Mediterranean Sea off Cap de Fer by SMU UB-48.
 * SS Helge (1883) (🇸🇪 Sweden): World War I: The coaster was sunk in the English Channel 6 nmi north of Guernsey, Channel Islands (48.81667°N, -2.75°W) by SMU UB-35 . Her crew survived.
 * SS Vav (1916) (🇳🇴 Norway): World War I: The cargo ship was sunk in the English Channel 1 nmi south of The Lizard, Cornwall, United Kingdom by SMU UB-80 with the loss of nineteen of her crew.

5 December

 * SS Aigburth (1917) ( undefined): World War I: The coaster was torpedoed and sunk in the North Sea 2 nmi off Robin Hood's Bay, Yorkshire by SMU UB-75 with the loss of eleven of her crew.
 * SS Armenia (1896) (🇺🇸 United States): World War I: The cargo liner was torpedoed and damaged in the English Channel 20 nmi east of Start Point, Devon, United Kingdom by SMU UB-80 . She was beached but was later refloated and returned to service.
 * SS Braeside (1915) ( undefined): World War I: The coaster was torpedoed and sunk in the English Channel 5 nmi south of the Owers Lightship ( undefined) by SMU UC-71 with the loss of all eleven crew.
 * SS Greenwich (1899) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 9 nmi south of the Île du Planier, Bouches-du-Rhône, France (43.06667°N, 5.2°W) by SMU UC-67 . Her crew survived.
 * HMT Helen Wilson : The naval trawler was lost on this date.

6 December

 * SS Ambiorix (🇧🇪 Belgium): The cargo ship sank in the English Channel (49.98333°N, -1.21667°W) after a collision with SS Primo (1908) (🇳🇴 Norway).
 * HMT Apley : World War I: The naval trawler struck a mine and sank in the English Channel east of the Isle of Wight (50.61667°N, -0.93333°W) with the loss of eleven of her crew.
 * SS Asaba (1900) ( undefined): World War I: The coaster was torpedoed and sunk in the English Channel 2 nmi west south west of The Lizard, Cornwall by SMU UC-17 with the loss of sixteen of her crew.
 * SS Ilvington Court (1911) ( undefined): World War I: The collier was torpedoed and sunk in the Mediterranean Sea 8 nmi north west by west of Cape Cherchell, Algeria (36.71667°N, 2.1°W) by SMU U-34 (Germany) with the loss of eight crew.
 * SS Imo (🇧🇪 Belgium): Halifax Explosion: The cargo ship collided with SS Mont-Blanc (🇫🇷 France) at Halifax, Nova Scotia, Canada. Mont-Blanc caught fire, exploded, and was obliterated, causing over 2,000 casualties. Imo was driven ashore by the explosion. She was subsequently repaired and returned to service.
 * USS Jacob Jones (DD-61) : World War I: The was torpedoed and sunk in the Atlantic Ocean off the Scilly Isles, United Kingdom (49.88333°N, -6.83333°W) by SMU U-53 . Sixty four crew were killed, two were taken prisoner.
 * SS Leda (1898) (🇳🇱 Netherlands): World War I: The cargo ship was sunk in the North Sea (54.2°N, -0.13333°W) by SMU UB-75.
 * FRENCH TRAWLER Tubereuse : World War I: The naval trawler struck a mine and sank in the Gulf of Patras with the loss of 24 of her crew.
 * SMU UC-69 : The Type UC II submarine collided with SMU U-96 at Barfleur, Manche, France (49.78333°N, -1.16667°W) and sank with the loss of eleven of her crew.
 * SS Wyndhurst (1917) ( undefined): World War I: The coaster was torpedoed and sunk in the English Channel 30 nmi south of St. Catherine's Point, Isle of Wight by SMU UC-71 with the loss of eleven of her crew.

7 December

 * SS Earl of Elgin (1909) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Irish Sea 10 nmi west by south of the Caernarvon Bay Lightship ( undefined) by SMU UC-75 with the loss of eighteen of her crew.
 * SS Highgate (1899) ( undefined): World War I: The cargo ship was torpedoed and sunk in the North Sea 2.5 nmi east of Robin Hood's Bay, Yorkshire by SMU UB-75 . Her crew survived.
 *  Proba ( undefined): World War I: The schooner was scuttled in the English Channel 3 nmi south east of The Lizard, Cornwall (49.93333°N, -5.13333°W) by SMU UB-55 . Her crew survived.
 *  W. C. McKay (🇨🇦 Canada): World War I: The schooner was scuttled in the Atlantic Ocean north east of the Azores, Portugal (40.95°N, -18.26667°W) by SMU U-156 with the loss of all six of her crew.

8 December

 * SS Consols (1906) ( undefined): World War I: the cargo ship was torpedoed and damaged in the Mediterranean Sea 40 nmi north west of Cape Bon, Algeria by SMU UB-48 with the loss of three of her crew. She was shelled and sunk the next day.
 * SS Corinto (1905) (🇳🇴 Norway): World War I: The coaster was sunk in the Atlantic Ocean 26 nmi north of Ouessant, Finistère, France (48.88333°N, -5.28333°W) by SMU UB-55 . Her crew survived.
 *  Giuseppe Naccari ( undefined): World War I: The brigantine was scuttled in the Mediterranean Sea 19 nmi north of Marettimo (38.6°N, 12°W) by SMU UC-53.
 * HMS Grive : World War I: The armed boarding steamer was torpedoed and damaged in the North Sea off Lerwick, Shetland Islands. She was beached but subsequently foundered on 24 December 4 nmi east north east of the North Ronaldsay Lighthouse, Orkney Islands whilst under tow.
 * SS Lampada (1889) ( undefined): World War I: The cargo ship was torpedoed and sunk in the North Sea 3 nmi north of Whitby, Yorkshire by SMU UB-75 with the loss of five of her crew.
 * La Vittoria ( undefined): World War I: The sailing vessel was sunk in the Mediterranean Sea south of Sardinia by SMU UC-67.
 * SS Maindy Bridge (1899) ( undefined): World War I: The cargo ship was torpedoed and sunk in the North Sea 4 nmi east north east of Sunderland, County Durham (55.01667°N, -1.3°W) by SMU UC-49 with the loss of two of her crew.
 * SS Nonni (1909) ( undefined): World War I: The cargo ship was sunk in the Atlantic Ocean off Brest, Finistère (48.88333°N, -4.46667°W) by SMU UB-18.
 * USS Rush (SP-712) : The patrol vessel struck a submerged log at League Island Navy Yard and sank. She was declared a total loss.

9 December

 * SS Adour (1904) (🇳🇴 Norway): World War I: The cargo shp was sunk in the Mediterranean Sea 2 nmi off the Isla Horminga Lighthouse, Spain (37.66667°N, -0.56667°W) by SMU U-64 (Germany) with the loss of two crew.
 * SS Costas (1896) (🇬🇷 Greece): World War I: The cargo ship was sunk in the Mediterranean Sea off Cape Vaticano, Italy (38.73333°N, 15.56667°W) by SMU UC-53 . Her crew survived.
 * SMU UB-18 : World War I: The Type UB II submarine was rammed and sunk in the English Channel (49.28333°N, -5.78333°W) by HMT Ben Lawer with the loss of all 24 crew.
 * SS Venetia (1898) ( undefined): World War I: The collier was torpedoed and sunk in the North Sea 3 nmi north north west of Whitby, Yorkshire (54.53333°N, -0.65°W) by SMU UB-75 . Her crew survived.
 * SS War Tune ( undefined): World War I: The cargo ship was torpedoed and sunk in the English Channel 1.5 nmi south south east of Black Head, Cornwall (49.98333°N, -5.08333°W) by SMU U-53 with the loss of a crew member.

10 December

 * Antonio Magliulo ( undefined): World War I: The sailing vessel was shelled and sunk in the Tyrrhenian Sea west of Naples (40.58333°N, 13.3°W) by SMU UC-53.
 * SS Crathorne (1888) (🇳🇴 Norway): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea off Alicante, Spain (38.46667°N, -0.01667°W) by SMU U-64 (Germany) with the loss of three of her crew.
 * Forward ( undefined): World War I: The fishing smack was scuttled in the North Sea off Aldeburgh, Suffolk by SMU UB-17 . Her crew survived.
 * SS Øiekast (🇳🇴 Norway): World War I: The coaster was sunk in the English Channel 25 nmi north east of Barfleur, Manche, France by SMU U-53 . Her crew survived.
 * SS Owasco (1893) (🇺🇸 United States): World War I: The cargo ship was sunk in the Mediterranean Sea off Alicante (38.46667°N, -0.21667°W) by SMU U-64 (Germany) with the loss of two of her crew.
 * SMU UB-75 : World War I: The Type UB III submarine struck a mine and sank in the North Sea off Scarborough, Yorkshire, United Kingdom with the loss of all 34 crew.
 * SMS Wien : World War I: The was torpedoed and sunk at Trieste, Italy by two Regia Marina torpedo boats with the loss of 46 of her 469 crew.

11 December

 * Argus (🇵🇹 Portugal): World War I: The fishing vessel was sunk in the Atlantic Ocean off Leixões by SMU UB-55.
 * SS Bard (1891) (🇳🇴 Norway): World War I: The coaster was torpedoed and sunk in the Atlantic Ocean off St. Agnes Head, Cornwall, United Kingdom (50.31667°N, -5.36667°W) by SMU U-60 with the loss of seven crew.
 * SS D. A. Gordon (1910) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea off Alicante, Soain (38.36667°N, -0.31667°W) by SMU U-64 (Germany) with the loss of a crew member.
 * Ligeiro (🇵🇹 Portugal): World War I: The fishing vessel was sunk in the Atlantic Ocean off Leixões by SMU UB-55.
 * SS Minorca (1892) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea off Cabo de las Huertas, Spain by SMU U-64 (Germany) . Her crew survived.
 * SS Oldfield Grange (1913) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 30 nmi north east of Tory Island, County Donegal (55.76667°N, -7.93333°W) by SMU U-62 . Her crew survived.
 * SS Persier (1910) ( undefined): World War I: The collier was torpedoed and sunk in the Mediterranean Sea 50 nmi east of Cape Spartivento, Calabria, Italy (37.96667°N, 17.15°W) by SMU U-35 (Germany) with the loss of a crew member.
 * Portuguesa (🇵🇹 Portugal): World War I: The sailing vessel was sunk in the Atlantic Ocean off Leixões by SMU UB-55.
 * Vigneira (or Virgeira) (🇵🇹 Portugal): World War I: The fishing vessel was sunk in the Atlantic Ocean off Leixões by SMU UB-55.

12 December

 * Amadavat ( undefined): World War I: The trawler struck a mine and sank in the North Sea east of the Shetland Islands with the loss of nine crew.
 *  Bellville (🇸🇪 Sweden): World War I: The barque was scuttled in the Atlantic Ocean south west of the Tuskar Rock (51.7°N, -6.31667°W) by SMU UB-65 . Her crew survived.
 * SS Charleston (1908) ( undefined): World War I: The collier was scuttled in St. George's Channel 30 nmi west of The Smalls (51.61667°N, -5.98333°W) by SMU UB-65 . Her crew survived, but two of them were taken as prisoners of war.
 * HMT Commander Fullerton : World War I: The naval trawler was shelled and sunk in the Norwegian Sea by SMS G101, SMS G103, SMS G104 and SMS V100 (all ).
 * SS Cordova ( undefined): World War I: The cargo ship was torpedoed and sunk in the Norwegian Sea 50 nmi west of Bergen, Rogaland, Norway by SMS G101, SMS G103, SMS G104 and SMS V100 (all ).
 * USS Elizabeth (SP-972) : The patrol vessel collided with SS Northland (🇺🇸 United States at Norfolk, Virginia and sank. She was subsequently salvaged, repaired and returned to service.
 *  Emanuele C. ( undefined): World War I: The schooner was shelled and sunk in the Mediterranean Sea off Cape Bougaroun, Algeria (37.61667°N, 8.5°W) by SMU U-34 (Germany) . Her crew survived.
 * SS Emlyndene (1904) ( undefined): World War I: The coaster was torpedoed and sunk in the English Channel east of Start Point, Devon by SMU UC-50 with the loss of all fourteen of her crew.
 * Francis Blanchflower ( undefined): World War I: The trawler was shelled and sunk in the North Sea by three Kaiserliche Marine destroyers with the loss of four of her eight crew.
 * John M. Smart ( undefined): World War I: The trawler was shelled and sunk in the North Sea 10 nmi east of the mouth of thr River Tyne by a Kaiserliche Marine torpedo boat destroyer with the loss of four of her crew.
 * SS Leonatus (1903) ( undefined): World War I: The cargo ship was torpedoed and sunk in the North Sea 2 nmi east by south of the Bressay Lighthouse, Shetland Islands by SMU UC-40 . Her crew survived.
 * HMT Livingstone : The naval trawler was torpedoed, shelled and sunk in the Norwegian Sea by SMS G101, SMS G103, SMS G104 and SMS V100 (all ).
 * HMT Lord Alverstone : The naval trawler was shelled and sunk in the Norwegian Sea by SMS G101, SMS G103, SMS G104 and SMS V100 (all ).
 * MV Maracaibo (1916) (🇩🇰 Denmark ): World War I: The cargo ship was shelled and sunk in the Norwegian Sea 50 nmi west of Bergen by SMS G101, SMS G103, SMS G104 and SMS V100 (all ).
 * SS Nike ( undefined): World War I: The cargo ship was torpedoed and sunk in the North Sea 8 nmi east of Blyth, Northumberland by SMS B97 and SMS B111 (both ).
 * HMS Partridge (1916) : World War I: The was shelled and sunk in the Norwegian Sea by SMS G101, SMS G103, SMS G104 and SMS V100 (all ). Twenty four survivors were rescued by the Germans.
 * SS St. Croix (1907) (🇳🇴 Norway): World War I: The cargo liner was torpedoed and damaged in the Bristol Channel 13 nmi north west of Hartland Point, Devon, United Kingdom (50.81667°N, -4.81667°W) by SMU U-60 with the loss of two crew. She was taken under tow but sank the next day 10 nmi south west by west of Hartland Point.
 * HMT Tokio : World War I: The naval trawler was shelled and sunk in the Norwegian Sea by SMS G101, SMS G103, SMS G104 and SMS V100 (all ).
 * SS Torleif (1888) (🇸🇪 Sweden): World War I: The cargo ship was shelled and sunk in the Norwegian Sea (59.71667°N, 4.16667°W) by SMS G101, SMS G103, SMS G104 and SMS V100 (all ).
 * HMS Wolverine (1910) : The collided with HMS Rosemary  in the Atlantic Ocean north west of Ireland and sank.

13 December

 * SS Arnewood (1916) ( undefined): World War I: The collier struck a mine and sank in the Atlantic Ocean 4 nmi east south east of Sleat Point, Skye (57.01667°N, -5.9°W). Her crew survived.
 * SS Bangarth (1906) ( undefined): World War I: The collier was torpedoed and sunk in the North Sea 13 nmi north north east of the mouth of the River Tyne by SMU UB-34 with the loss of two of her crew.
 * Britannic ( undefined): World War I: The sailing vessel was scuttled in the English Channel 12 nmi north north west of the Les Hanois Lighthouse, Guernsey, Channel Islands (49.6°N, -2.88333°W) by SMU UB-31 . Her crew survived.
 *  Chili (🇫🇷 France): World War I: The barque was damaged in the Atlantic Ocean 100 nmi west of Ouessant, Finistère by SMU UB-54 . She sank the next day.
 * SS Garthwaite (1917) ( undefined): World War I: The cargo ship was torpedoed and sunk in the North Sea 4 nmi east of Whitby, Yorkshire by SMU UB-22 with the loss of fourteen crew.
 * SS Karen (1905) (🇳🇴 Norway): World War I: The cargo ship was sunk in the Mediterranean Sea 5 nmi off Porto Anzio, Italy by SMU UC-53 with the loss of a crew member.
 *  Little Gem ( undefined): World War I: The schooner was sunk in the English Channell west of the Casquets, Channel Islands by SMU U-87 with the loss of five of her crew.
 * SS Noviembre (1895) (🇪🇸 Spain): World War I: The cargo ship was sunk in the Bay of Biscay 10 nmi off the mouth of the Gironde River, France (45.4°N, -1.61667°W) by SMU U-102 . Her crew survived.
 * SS Ottokar (1884) ( undefined): World War I: The coaster was sunk in the North Sea off Whitby by SMU UB-38 . Her crew survived.
 * HMS Stephen Furness : World War I: The armed boarding steamer was sunk in the Irish Sea west of the Isle of Man by SMU UB-64 with the loss of 101 lives.
 * SMU U-75 : World War I: The Type UE I submarine struck a mine and sank in the North Sea off Terschelling, Friesland, Netherlands with the loss of 23 of her crew.

14 December

 * FRENCH PROTECTED CRUISER Châteaurenault : World War I: The protected cruiser was torpedoed and sunk in the Mediterranean Sea (38.25°N, 20.36667°W) by SMU UC-38 . The 1,162 survivors were rescued by FRENCH DESTROYER Lansquenet, FRENCH DESTROYER Mameluck and Rouen (all ).
 * SS Coila (1911) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 3 nmi south east of Canet Point, Spain (39.61667°N, 0.13333°W) by SMU U-64 (Germany) with the loss of three of her crew.
 * SS Hare (1886) ( undefined): World War I: The coaster was torpedoed and sunk in the Irish Sea 7 nmi off the Kish Lightship ( undefined) by SMU U-62 with the loss of twelve crew.
 * SS Nor (1901) (🇳🇴 Norway): World War I: The cargo ship was sunk in the Irish Sea (52.75°N, -5.71667°W) by SMU UB-65 with the loss of two of her crew.
 * SMU UC-38 : World War I: The Type UC II submarine was depth charged and sunk in the Mediterranean Sea (38.25°N, 20.36667°W) by FRENCH DESTROYER Lansquenet . There were twenty survivors.
 * SS Volnay (1910) ( undefined): World War I: The cargo ship struck a mine and sank in the Atlantic Ocean 2 nmi south of The Manacles (50.06667°N, -5.05°W). Her crew survived.

15 December

 * SS Bernard (1900) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 180 nmi west south west of the Bishop Rock, Isles of Scilly (48.66667°N, -9.96667°W) by SMU U-94 with the loss of a crew member.
 * SS Dafni (1881) (🇬🇷 Greece): World War I: The cargo ship was sunk in the North Sea 3 nmi north north east of Hartlepool, County Durham, United Kingdom (54.73333°N, -1.15°W) by SMU UB-34 . Her crew survived.
 * SS Formby (1914) ( undefined): World War I: The passenger ship was sunk in the Irish Sea 20 nmi north west of Bardsey Island, Pembrokeshire by SMU U-62 with the loss of all 35 crew.
 * SS Ioannina (1897) (🇬🇷 Greece): World War I: The cargo ship was scuttled in the Atlantic Ocean 150 nmi north west of Madeira, Portugal (34.66667°N, -19.75°W) by SMU U-156.
 * SS Maidag (🇳🇴 Norway): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 22 nmi south of the Wolf Rock, Cornwall, United Kingdom (49.6°N, -5.6°W) by SMU U-104 with the loss of three crew.

16 December

 * HMS Arbutus (1917) : World War I: The, operating as a Q-ship, was sunk in St. George's Channel (51.61667°N, -5.4°W) by SMU UB-65 with the loss of nine of her crew.
 * SS Bristol City (1899) ( undefined): World War I: The cargo ship was sunk in the Atlantic Ocean 250 nmi west of Ouessant, Finistère, France (46.63333°N, -10.46667°W) by SMU U-94 with the loss of 30 of her crew.
 * SS Foylemore (1911) ( undefined): World War I: The cargo ship was torpedoed and sunk in the English Channel 22 nmi east of The Lizard, Cornwall (49.96667°N, -4.63333°W) by SMU UB-55 . Her crew survived.
 * SS Greenhill ( undefined): The collier was lost on this date.
 *  New York ( undefined): World War I: The brigantine was shelled and sunk in the Mediterranean Sea off Cape San Vito, Sicily (38.23333°N, 12.91667°W) by SMU UB-49.
 * San Francesco di Paola ( undefined): World War I: The sailing vessel was sunk in the Mediterranean Sea off Cape San Vito by SMU UB-49.

17 December

 *  Acoria (🇵🇹 Portugal): World War I: The schooner was scuttled in the Atlantic Ocean south east of the Azores (35.16667°N, -18.33333°W) by SMU U-156 . Her crew survived.
 * SS Coningbeg (1904) ( undefined): World War I: The cargo ship was sunk in the Irish Sea 20 nmi south west of Bardsey Island, Pembrokeshire by SMU U-62 with the loss of all fifteen crew.
 * HMT Duster : The naval trawler was wrecked in Scratten Cove, Portreath, Cornwall.
 * USS F-1 (SS-20) : The F-class submarine sank in the Pacific Ocean after a collision with USS F-3 (SS-22) off Point Loma, California. Nineteen of her 22 crew were killed.
 * Neptune ( undefined): World War I: The fishing smack struck a mine and sank in the Atlantic Ocean 4.5 nmi north of Black Head, County Clare with the loss of four crew.
 * Nina (🇬🇷 Greece): World War I: The sailing vessel was sunk in the Mediterranean Sea south east of Crete (34.6°N, 27.26667°W) by SMU UB-53.

18 December

 * Charles ( undefined): World War I: The sailing vessel was shelled and sunk in the English Channel by a Kaiserliche Marine submarine with the loss of three of her crew.
 * SS Riversdale (1906) ( undefined): World War I: The cargo ship was torpedoed and sunk in the English Channel 1 nmi south of Prawle Point, Devon by SMU UB-31 with the loss of a crew member.

19 December

 * HMT Annie : The naval trawler was lost in the Mediterranean Sea on this date.
 * SS Arno (1898) (🇩🇰 Denmark): World War I: The cargo ship struck a mine and sank in the North Sea east south east of Aberdeen, United Kingdom (57.33333°N, -1°W). Her crew survived.
 * SS Borgsten (1913) (🇳🇴 Norway): World War I: The cargo ship was torpedoed and sunk in the English Channel 30 nmi off Barfleur, Manche, France by SMU UC-64 . Her crew survived.
 * SS Ingrid II (🇳🇴 Norway): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 6 nmi off Trevose Head, Cornwall, United Kingdom (50.6°N, -5.18333°W) by SMU U-60 with the loss of ten crew.
 * S. Giuseppe B. ( undefined): World War I: The sailing vessel was sunk in the Mediterranean Sea by SMU UB-50.
 * SS Trevelyan (1894) ( undefined): World War I: The cargo ship was torpedoed and damaged in the English Channel 20 nmi north of Cap Barfleur, Manche by SMU UC-64 . She was beached and was consequently declared a constructive total loss. Later repaired and returned to service.
 * SMU UB-56 : World War I: The Type UB III submarine struck a mine and sank in the Strait of Dover (50.96667°N, 1.35°W) with the loss of all 37 crew.
 * SS Vinovia (1906) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 8 nmi south of the Wolf Rock, Cornwall (49.93333°N, -5.55°W) by SMU U-105 with the loss of nine crew.

20 December

 * SS Alice Marie (1915) ( undefined): World War I: The cargo ship was torpedoed and sunk in the English Channel 6 nmi east north east of Start Point, Devon by SMU UB-31 . Her crew survived.
 * SS Attualita (1900) ( undefined): World War I: The cargo ship was sunk in the Gulf of Genoa off Arma di Taggia, Liguria (43.81667°N, 7.88333°W) by SMU UB-49 . Her crew survived.
 * SS Eveline (1897) ( undefined): World War I: The cargo ship was torpedoed and sunk in the English Channel 9.5 nmi south of Berry Head, Devon by SMU UB-31 . Her crew survived.
 * SS Fiscus (1917) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 10 nmi north north east of Cape Ivi, Algeria by SMU U-35 (Germany) with the loss of a crew member.
 * SS Kintuck ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 8 nmi north west by north of the Godrevy Lighthouse, Cornwall by a Kaiserliche Marine submarine with the loss of a crew member.
 * SS Noris (🇳🇴 Norway): World War I: The coaster was sunk in the English Channel 10 nmi off Port-en-Bessin, Calvados, France by SMU UB-54 with the loss of fourteen crew.
 * SS Polvarth (1909) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 35 nmi west of Ouessant, Finistère, France (48.33333°N, -6°W) by SMU U-86 with the loss of two of her crew.
 * SS Regin (1915) (🇳🇴 Norway): World War I: The cargo ship was sunk in the Gulf of Genoa 1 nmi south of Cape Mele, Liguria by SMU UB-49 with the loss of a crew member.
 * SS Suruga (1908) (🇺🇸 United States): World War I: The cargo ship was damaged in the Gulf of Genoa by SMU UB-49 . She was beached at San Remo, Liguria. Later refloated, repaired and returned to service.
 * SS Warsaw (1864) ( undefined): World War I: The coaster was torpedoed and sunk in the English Channel 4 nmi south east by east of Start Point by SMU UB-31 with the loss of seventeen crew.
 * SS Waverley (1901) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 33 nmi north east of Cape Ivi (36.61667°N, 0.55°W) by SMU U-35 (Germany) with the loss of 22 crew.

21 December

 * SS Boa Vista (1901) (🇵🇹 Portugal): World War I: The cargo ship was torpedoed and sunk in the Bay of Biscay 5 nmi south west of the Île d'Yeu, Vendée, France (46.61667°N, -2.55°W) by SMU U-88 with the loss of two of her crew. Survivors were rescued by FRENCH PATROL BOAT Sauterelle.
 * SS City of Lucknow (1917) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 50 nmi north east by east of the Cani Rocks by SMU UB-50 . Her crew survived.
 * HMT Ocean Scout I : The naval trawler collided with another vessel and sank in the Atlantic Ocean west of Ireland.
 * SS Orne (1903) (🇫🇷 France): World War I: The coaster was sunk in the English Channel 25 nmi west of Portland Bill, Dorset, United Kingdom by SMU UB-54 . Her crew survived.
 * SS Spro (🇳🇴 Norway): World War I: The cargo ship was sunk in the Bay of Biscay 4 nmi off the Glénan Islands, Finistère, France (47.6°N, -4.06667°W) by SMU U-104 with the loss of twelve crew.
 * SS Stromboli (1911) ( undefined): World War I: The cargo ship was sunk in the Gulf of Genoa off Cape Mele, Liguria (43.95°N, 8.2°W) by SMU UB-49.

22 December

 * SS Clan Cameron (1900) ( undefined): World War I: The cargo ship was torpedoed and sunk in the English Channel 23 nmi south west of Portland Bill, Dorset by SMU UB-58.
 * SS Colemere (1915) ( undefined): World War I: The cargo ship was torpedoed and sunk in St. George's Channel 35 nmi west of the Smalls Lighthouse by SMU U-105 with the loss of four crew.
 * SS Mabel Baird (1901) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 4 nmi west south west of The Lizard, Cornwall (49.95°N, -5.28333°W) by SMU UB-57 with the loss of five of her crew.
 * SS Piemonte (1895) ( undefined): World War I: The cargo ship was damaged in the Gulf of Genoa south of Livorno, Tuscany by SMU UB-49 . She was beached but was later salvaged.

23 December

 * SS Caboto (1905) ( undefined): World War I: The cargo ship was sunk in the Gulf of Genoa 20 nminorth of Polpulonia, Tuscany by SMU UB-49.
 * SS Grantley Hall (1902) ( undefined): World War I: The cargo ship struck a mine and sank in the North Sea 5 nmi east of Orfordness, Suffolk. Her crew survived.
 * SS Hilda Lea (1916) ( undefined): World War I: The cargo ship was torpedoed and sunk in the English Channel 24 nmi south by east of St. Catherine's Point, Isle of Wight by SMU UB-35 with the loss of a crew member.
 * SS Pietro (1901) ( undefined): World War I: The cargo ship was sunk in the Mediterranean Sea off Puerto Mazarrón, Murcia, Spain (37.46667°N, -1.16667°W) by SMU U-35 (Germany).
 * SS Ragna (1892) (🇳🇴 Norway): World War I: The cargo ship was sunk in the English Channel 16 nmi north west of the Cap de La Heve Lighthouse, Seine-Maritime, France by SMU UB-54 . Her crew survived.
 * HMS Surprise (1916) : World War I: The struck a mine and sank in the North Sea off the coast of the Netherlands.
 * HMS Tornado (1917) : The destroyer struck a mine and sank in the North Sea off the coast of the Netherlands.
 * HMS Torrent (1916) : The destroyer struck a mine and sank in the North Sea off the coast of the Netherlands.
 * Vellore (🇳🇴 Norway): World War I: The sailing vessel was sunk in the Atlantic Ocean 35 nmi west of the Bishop Rock, Isles of Scilly, United Kingdom by SMU UB-57 . Her crew survived.

24 December

 * SS Canova (1895) ( undefined): World War I: The cargo ship was torpedoed and sunk 15 nmi south of Mine Head, Ireland by SMU U-105 with the loss of seven crew.
 * SS Daybreak (1911) ( undefined: World War I: The cargo ship was torpedoed and sunk in the Irish Sea 1 nmi east of the South Rock Lightship ( undefined) by SMU U-87 with the loss of 21 of her crew.
 * SS Luciston (1890) ( undefined): World War I: The cargo ship was torpedoed and damaged in the English Channel 1.5 nmi west by south of the Owers Lightship ( undefined) by SMU UC-71 with the loss of a crew member. She was beached was declared a total loss. The wreck was dispersed in December 1923.
 * HMS Penshurst : World War I: The Q-ship was torpedoed and sunk in the Bristol Channel (51.63333°N, -5.8°W) by SMU U-110 with the loss of two crew.
 * SS Turnbridge (1894) ( undefined): World War I: The collier was torpedoed and sunk in the Mediterranean Sea 34 nmi north east by north of Cape Ivi, Algeria (36.61667°N, 0.4°W) by SMU U-35 (Germany) with the loss of a crew member.

25 December

 * SS Agberi (1905) ( undefined): World War I: The Elder Dempster 3,463 grt ocean liner was torpedoed and sunk in St. George's Channel 18 nmi north west of Bardsey Island, Pembrokeshire by SMU U-87 en route from Dakar to Liverpool. There were no casualties.
 * SS Ajax (1889) (🇩🇰 Denmark): World War I: The cargo ship was torpedoed and sunk in the Bay of Biscay off Audiere, Finistère (47.88333°N, -4.53333°W) by SMU U-104 with the loss of eleven crew.
 * SS Argo (1895) ( undefined): World War I: The collier was torpedoed and sunk in the Mediterranean Sea 18 nmi north west of Cape Ténès, Algeria (36.7°N, 1.01667°W) by SMU U-35 (Germany) . Her crew survived.
 * SS Cliftondale (1901) ( undefined): World War I: The collier was torpedoed and sunk in the Mediterranean Sea 36 nmi east by north of Cape Ténès by SMU U-35 (Germany) with the loss of three crew.
 * SS Espagne (1909) (🇧🇪 Belgium): World War I: The cargo ship was sunk in the English Channel off St. Catherine's Point, Isle of Wight, United Kingdom (50.43333°N, -1.48333°W) by SMU UC-71.
 * SS Hekla (1891) (🇩🇰 Denmark): World War I: The coaster struck a mine and sank in the Mediterranean Sea 3 nmi south west of Cape Palinuro, Italy (39.83333°N, 15.7°W) with the loss of thirteen of her crew.
 * SS Nordpol (1903) (🇳🇴 Norway): World War I: The cargo ship was sunk in the Mediterranean Sea 30 nmi off Cape Cherchell, Algeria (37.03333°N, 2.03333°W) by SMU U-35 (Germany) . Her crew survived.
 *  Sant' Antonio ( undefined): World War I: The barque was shelled and sunk in the Mediterranean Sea off the coast of Algeria by SMU UB-50.
 * SMU U-87 : World War I: The Type U 87 submarine was rammed in the Irish Sea by HMS Buttercup and was then depth charged and sunk by the patrol craft PC-56 (both ) with the loss of all 44 crew.
 * SS Umballa (1898) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Gulf of Policastro 8 nmi south of Cape Scala, Italy (39.76667°N, 15.65°W) by SMU UB-49 . Her crew survived.

26 December

 * SS Benito (1907) ( undefined): World War I: Convoy OF 18: The cargo ship was torpedoed and sunk in the English Channel 9 nmi south of Dodman Point, Cornwall (50.06667°N, -4.75°W) by SMU UB-57 . Her crew survived.
 * Lydia (🇵🇹 Portugal): World War I: The sailing vessel was sunk in the Atlantic Ocean south of Faial Island, Azores (37.83333°N, -28.66667°W) by SMU U-157 . Her crew survived.
 * SS Skaala (🇳🇴 Norway): World War I: The cargo ship was torpedoed and sunk in the English Channel 4 nmi west of Prawle Point, Devon, United Kingdom (50.18333°N, -3.83333°W) by SMU UB-35 with the loss of a crew member.
 * SS Tregenna (1917) ( undefined): World War I: Convoy OF 18: The cargo ship was torpedoed and sunk in the English Channel 9 nmi south of Dodman Point (50.06667°N, -4.75°W) by SMU UB-57 . Her crew survived.

27 December

 * SS Adela (1878) ( undefined): World War I: The coaster was torpedoed and sunk in the Irish Sea 12 nmi north west of The Skerries, Isle of Anglesey by SMU U-100 with the loss of 24 of her crew.
 * SS P.L.M. 4 (1916) (🇫🇷 France): World War I: The cargo ship was sunk in the English Channel 28 nmi north east of Barfleu, Seine-Maritime by SMU UC-71.

28 December

 * Alfred H. Read ( undefined): World War I: The pilot vessel struck a mine and sank in the River Mersey with the loss of 39 lives.
 * SS Chirripo (1906) ( undefined): World War I: The cargo ship struck a mine and sank in Belfast Lough. Her crew survived.
 * SS Clara (1898) ( undefined): World War I: The collier was torpedoed and sunk in the English Channel (50.18333°N, -5.6°W) by SMU UB-57 . Her crew survived.
 * SS Dauno (1878) ( undefined): World War I: The coaster was sunk in the Mediterranean Sea east of Benghazi, Libya by SMU UC-73.
 * SS Fallodon (1903) ( undefined): World War I: The cargo ship was torpedoed and sunk in the English Channel 12 nmi south south east of St. Catherine's Point, Isle of Wight (50.43333°N, -1.1°W) by SMU UC-71 with the loss of a crew member.
 * SS Lord Derby (1905) ( undefined): World War I: The collier was torpedoed and sunk in St. George's Channel 7 nmi south west by south of St. Anns Head by SMU U-105 with the loss of three crew.
 * SS Magellan (1904) (🇫🇷 France): World War I: The cargo ship was sunk in the Atlantic Ocean 166 nmi north west of Cape Finisterre, Spain (43.16667°N, -13.53333°W) by SMU U-43 (Germany).
 * SS Maxton (1912) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 28 nmi north of Malin Head, County Donegal by SMU U-19 (Germany) with the loss of a crew member.
 * HMT Piscatorial II : World War I: The naval trawler struck a mine and sank in the English Channel 7 nmi south west of Brighton, East Sussex with the loss of all ten of her crew.
 * SS Robert Eggleton (1890) ( undefined): World War I: The cargo ship was torpedoed and sunk in St. George's Channel 10 nmi south west of Bardsey Island, Pembrokeshire by SMU U-91 . Her crew survived.
 * SS Santa Amalia (1906) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 30 nmi north north east of Malin Head by SMU U-19 (Germany) with the loss of 43 crew.

29 December

 * SS Ennismore (1880) ( undefined): World War I: The cargo ship was torpedoed and sunk in the North Sea 15 nmi south east of Buchan Ness, Aberdeenshire (57.28333°N, -1.41667°W) by SMU UC-58 with the loss of ten of her crew.
 * SS Patria (1882) ( undefined): World War I: The cargo ship was sunk in the North Sea 8 nmi off Hartlepool, County Durham, United Kingdom by SMU UB-21.
 * SS Peregrine ( undefined): The passenger ship ran aground in the North Sea 14 nmi off Walton-on-the-Naze, Essex. All 88 people on board were rescued by the Walton Lifeboat.
 * HMT Sapper : World War I: The naval trawler struck a mine and sank in the English Channel off the Owers Lightship ( undefined) (50.61667°N, -0.68333°W) with the loss of all nineteen crew.
 * SS Tiro (1910) (🇳🇴 Norway): World War I: The cargo ship was sunk in the Atlantic Ocean 7 nmi north west by west of The Lizard, Cornwall, United Kingdom (49.93333°N, -5.38333°W) by SMU UB-57 . Her crew survived.

30 December

 * RMS Aragon (1905) ( undefined): World War I: The troopship was torpedoed and sunk in the Mediterranean Sea off Alexandria, Egypt (31.3°N, 29.8°W) by SMU UC-34 with the loss of 610 lives.
 * HMS Attack (1911) : World War I: The was torpedoed and sunk in the Mediterranean Sea off Alexandria (31.3°N, 29.81667°W) by SMU UC-34  whilst rescuing survivors from RMS Aragon (1905) ( undefined). Ten of her 70 crew were killed.
 * SS Hercules (1909) ( undefined): World War I: The collier was torpedoed and sunk in the North Sea 3 nmi east north east of Whitby, Yorkshire (54.53333°N, -0.65°W) by SMU UB-21 with the loss of twelve of her crew.
 * SS Joachim Mumbru (1880) (🇪🇸 Spain): World War I: The cargo ship was sunk in the Atlantic Ocean south of Madeira, Portugal (31.28333°N, -17.33333°W) by SMU U-156.
 * SS Zone (1903) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 4 nmi off St. Ives, Cornwall (50.26667°N, -5.48333°W) by SMU U-110 . Her crew survived.

31 December

 * USS Fli-Hawk (SP-550) : The patrol boat collided with SS Gratitude (🇺🇸 United States) at Norfolk, Virginia and sank. She was subsequently raised, repaired and returned to service.
 * SS Lily (1900) (🇬🇷 Greece): World War I: The cargo ship was sunk in the Mediterranean Sea 50 nmi west of Port Said, Egypt (32.2°N, 32.13333°W) by SMU UB-53.
 * HMS Osmanieh : World War I: The fleet messenger struck a mine and sank at Alexandria, Egypt with the loss of 198 lives.
 * SS Vigrid (🇳🇴 Norway): World War I: The cargo ship was torpedoed and sunk in the English Channel 10 nmi north west of The Lizard, Cornwall, United Kingdom (50.05°N, -5.91667°W) by SMU U-95 with the loss of five of her crew.
 * SS Westville (1913) ( undefined): World War I: The cargo ship was torpedoed and sunk in the English Channel 5 nmi west south west of St. Catherine's Point, Isle of Wight (50.53333°N, -1.41667°W) by SMU UB-35 . Her crew survived.