List of shipwrecks in December 1917

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

December 1917
Mon	Tue	Wed	Thu	Fri	Sat	Sun
					1	2
3	4	5	6	7	8	9
10	11	12	13	14	15	16
17	18	19	20	21	22	23
24	25	26	27	28	29	30
31

1 December

• Antonios Stathatos (Greece): World War I: The cargo ship was sunk in the Bay of Biscay off the Île du Pilier, Vendée, France (47°05′N 2°36′W) by SM U-84 (Kaiserliche Marine).
• Citta di Sassari (Kingdom of Italy): World War I: The passenger ship was sunk in the Tyrrhenian Sea off Cape Mele, Liguria (44°08′N 8°14′E) by SM U-65 (Kaiserliche Marine). Her crew survived.
• Euphorbia (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the English Channel 14 nautical miles (26 km) east by south of the Royal Sovereign Lightship (United Kingdom) by SM UC-75 (Kaiserliche Marine) with the loss of fourteen of her crew.
• Phoebus (French Navy): World War I: The naval yacht struck a mine and sank in the Mediterranean Sea off Cape Cepet, Var (43°10′N 5°20′E).
• Rion (United Kingdom of Great Britain and Ireland): World War I: The fishing smack was scuttled in the English Channel 8 nautical miles (15 km) north east of Start Point, Devon by SM UB-35 (Kaiserliche Marine). Her crew survived.
• Rydal Hall (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the English Channel 14 nautical miles (26 km) east by south of the Royal Sovereign Lightship (United Kingdom) by SM UC-75 (Kaiserliche Marine) with the loss of 23 of her crew.
• SM UB-81 (Kaiserliche Marine): 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 (United States Navy): The coal barge ran aground in the Ambrose Channel and was wrecked.

2 December

• Berwick Law (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea off Cape Ténès, Algeria by SM U-34 (Kaiserliche Marine) with the loss of a crew member.
• Birchgrove (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the Bay of Biscay off Groix, Morbihan, France (47°38′N 3°45′W) by SM U-84 (Kaiserliche Marine) with the loss of a crew member.
• Carlino (Kingdom of Italy): World War I: The sailing vessel was sunk in the Tyrrhenian Sea east of Corsica, France (42°08′N 7°27′E) by SM U-65 (Kaiserliche Marine).
• La Margherita (Kingdom of Italy): World War I: The sailing vessel was sunk in the Tyrrhenian Sea east of Corsica (42°11′N 7°20′E) by SM U-65 (Kaiserliche Marine).
• La Rance (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°48′N 5°15′E) by SM UC-67 (Kaiserliche Marine) with the loss of four of her crew.
• HMT Lord Grey (Royal Navy): The naval trawler was wrecked on the La Barrier Shoal, in the English Channel off Cap Gris Nez, Pas-de-Calais, France.
• Minas: (Greece) World War I: The cargo ship was sunk in the Mediterranean Sea off Cape Ténès by SM U-34 (Kaiserliche Marine). Her crew survived.
• Molesey (United Kingdom of Great Britain and Ireland): The cargo ship was torpedoed and sunk in the English Channel 12 nautical miles (22 km) south west by west of the Brighton Lightship (United Kingdom of Great Britain and Ireland) by a Kaiserliche Marine submarine.
• San Antonio Il Vittorioso (Kingdom of Italy): World War I: The sailing vessel was sunk in the Tyrrhenian Sea east of Corsica (42°16′N 7°20′E) by SM U-65 (Kaiserliche Marine).
• Tasmania (Russian Empire): World War I: The full-rigged ship was sunk in the Bay of Biscay south west of Ouessant, Finistère, France by SM UC-17 (Kaiserliche Marine).
• SM UB-81 (Kaiserliche Marine): 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

• Carmen (Kingdom of Italy): World War I: The cargo ship was sunk in the Mediterranean Sea south of the Île du Planier, Bouches-du-Rhône, France (43°05′N 5°12′E) by SM UC-67 (Kaiserliche Marine).
• Copeland (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was sunk in the Atlantic Ocean 5 nautical miles (9.3 km) south south west of the Tuskar Rock, Ireland (52°03′N 6°25′W) by SM U-57 (Kaiserliche Marine) with the loss of twelve crew.
• Livonia (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the English Channel 4 nautical miles (7.4 km) east by north of Start Point, Devon by SM UB-35 (Kaiserliche Marine) with the loss of 23 of her crew.
• Melo (Kingdom of Italy): 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.
• Wreathier (United Kingdom of Great Britain and Ireland): World War I: The coaster was torpedoed and sunk in the English Channel 1 nautical mile (1.9 km) west of Prawle Point, Devon by SM UB-35 (Kaiserliche Marine) with the loss of three of her crew.

4 December

• Alberto Verderame (Kingdom of Italy): World War I: The brigantine was shelled and sunk in the Gulf of Genoa (39°57′N 9°48′E) by SM UC-35 (Kaiserliche Marine).
• HMT Bounteous (Royal Navy): The naval trawler was lost on this date.
• Brigitta (United Kingdom of Great Britain and Ireland): World War I: The cargo ship struck a mine and sank in the English Channel 6 nautical miles (11 km) south west of the Nab Lightship (United Kingdom of Great Britain and Ireland) with the loss of two of her crew.
• Dowlais (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea off Cape de Fer, Algeria by SM UB-48 (Kaiserliche Marine) with the loss of 26 of her crew.
• Eagle (United Kingdom of Great Britain and Ireland): World War I: The coaster was scuttled in the English Channel 10 nautical miles (19 km) south of Start Point, Devon by SM UB-35 (Kaiserliche Marine). Her crew survived.
• Forfar (United Kingdom of Great Britain and Ireland): World War I: Convoy OF 15: The cargo ship was torpedoed and sunk in the Atlantic Ocean 115 nautical miles (213 km) south west by west of The Lizard by SM UC-17 (Kaiserliche Marine) with the loss of three of her crew.
• Gerasimos (Greece): World War I: The cargo ship was sunk in the Mediterranean Sea off Cap de Fer by SM UB-48 (Kaiserliche Marine).
• Helge (Sweden): World War I: The coaster was sunk in the English Channel 6 nautical miles (11 km) north of Guernsey, Channel Islands (48°49′N 2°45′W) by SM UB-35 (Kaiserliche Marine). Her crew survived.
• Vav (Norway): World War I: The cargo ship was sunk in the English Channel 1 nautical mile (1.9 km) south of The Lizard, Cornwall, United Kingdom by SM UB-80 (Kaiserliche Marine) with the loss of nineteen of her crew.

5 December

• Aigburth (United Kingdom of Great Britain and Ireland): World War I: The coaster was torpedoed and sunk in the North Sea 2 nautical miles (3.7 km) off Robin Hood's Bay, Yorkshire by SM UB-75 (Kaiserliche Marine) with the loss of eleven of her crew.
• Armenia (United States): World War I: The cargo liner was torpedoed and damaged in the English Channel 20 nautical miles (37 km) east of Start Point, Devon, United Kingdom by SM UB-80 (Kaiserliche Marine). She was beached but was later refloated and returned to service.
• Braeside (United Kingdom of Great Britain and Ireland): World War I: The coaster was torpedoed and sunk in the English Channel 5 nautical miles (9.3 km) south of the Owers Lightship (United Kingdom of Great Britain and Ireland) by SM UC-71 (Kaiserliche Marine) with the loss of all eleven crew.
• Greenwich (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 9 nautical miles (17 km) south of the Île du Planier, Bouches-du-Rhône, France (43°04′N 5°12′E) by SM UC-67 (Kaiserliche Marine). Her crew survived.
• HMT Helen Wilson (Royal Navy): The naval trawler was lost on this date.

6 December

• Ambiorix (Belgium): The cargo ship sank in the English Channel (49°59′N 1°13′W) after a collision with Primo (Norway).
• HMT Apley (Royal Navy): World War I: The naval trawler struck a mine and sank in the English Channel east of the Isle of Wight (50°37′N 0°56′W) with the loss of eleven of her crew.
• Asaba (United Kingdom of Great Britain and Ireland): World War I: The coaster was torpedoed and sunk in the English Channel 2 nautical miles (3.7 km) west south west of The Lizard, Cornwall by SM UC-17 (Kaiserliche Marine) with the loss of sixteen of her crew.
• Ilvington Court (United Kingdom of Great Britain and Ireland): World War I: The collier was torpedoed and sunk in the Mediterranean Sea 8 nautical miles (15 km) north west by west of Cape Cherchell, Algeria (36°43′N 2°06′E) by SM U-34 (Kaiserliche Marine) with the loss of eight crew.

Imo

• Imo (Belgium): Halifax Explosion: The cargo ship collided with 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 (United States Navy): World War I: The Tucker-class destroyer was torpedoed and sunk in the Atlantic Ocean off the Scilly Isles, United Kingdom (49°53′N 6°50′W) by U-53 (Kaiserliche Marine). Sixty four crew were killed, two were taken prisoner.
• Leda (Netherlands): World War I: The cargo ship was sunk in the North Sea (54°12′N 0°08′W) by SM UB-75 (Kaiserliche Marine).
• Tubereuse (French Navy): World War I: The naval trawler struck a mine and sank in the Gulf of Patras with the loss of 24 of her crew.
• SM UC-69 (Kaiserliche Marine): The Type UC II submarine collided with SM U-96 (Kaiserliche Marine) at Barfleur, Manche, France (49°47′N 1°10′W) and sank with the loss of eleven of her crew.
• Wyndhurst (United Kingdom of Great Britain and Ireland): World War I: The coaster was torpedoed and sunk in the English Channel 30 nautical miles (56 km) south of St. Catherine's Point, Isle of Wight by SM UC-71 (Kaiserliche Marine) with the loss of eleven of her crew.

7 December

• Earl of Elgin (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the Irish Sea 10 nautical miles (19 km) west by south of the Caernarvon Bay Lightship (United Kingdom of Great Britain and Ireland) by SM UC-75 (Kaiserliche Marine) with the loss of eighteen of her crew.
• Highgate (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the North Sea 2.5 nautical miles (4.6 km) east of Robin Hood's Bay, Yorkshire by SM UB-75 (Kaiserliche Marine). Her crew survived.
• Proba (United Kingdom of Great Britain and Ireland): World War I: The schooner was scuttled in the English Channel 3 nautical miles (5.6 km) south east of The Lizard, Cornwall (49°56′N 5°08′W) by SM UB-55 (Kaiserliche Marine). 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°57′N 18°16′W) by SM U-156 (Kaiserliche Marine) with the loss of all six of her crew.

8 December

• Consols (United Kingdom of Great Britain and Ireland): World War I: the cargo ship was torpedoed and damaged in the Mediterranean Sea 40 nautical miles (74 km) north west of Cape Bon, Algeria by SM UB-48 (Kaiserliche Marine) with the loss of three of her crew. She was shelled and sunk the next day.
• Corinto (Norway): World War I: The coaster was sunk in the Atlantic Ocean 26 nautical miles (48 km) north of Ouessant, Finistère, France (48°53′N 5°17′W) by SM UB-55 (Kaiserliche Marine). Her crew survived.
• Giuseppe Naccari (Kingdom of Italy): World War I: The brigantine was scuttled in the Mediterranean Sea 19 nautical miles (35 km) north of Marettimo (38°36′N 12°00′E) by SM UC-53 (Kaiserliche Marine).
• HMS Grive (Royal Navy): 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 nautical miles (7.4 km) east north east of the North Ronaldsay Lighthouse, Orkney Islands whilst under tow.
• Lampada (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the North Sea 3 nautical miles (5.6 km) north of Whitby, Yorkshire by SM UB-75 (Kaiserliche Marine) with the loss of five of her crew.
• La Vittoria (Kingdom of Italy): World War I: The sailing vessel was sunk in the Mediterranean Sea south of Sardinia by SM UC-67 (Kaiserliche Marine).
• Maindy Bridge (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the North Sea 4 nautical miles (7.4 km) east north east of Sunderland, County Durham (55°01′N 1°18′W) by SM UC-49 (Kaiserliche Marine) with the loss of two of her crew.
• Nonni (Russian Empire): World War I: The cargo ship was sunk in the Atlantic Ocean off Brest, Finistère (48°53′N 4°28′W) by SM UB-18 (Kaiserliche Marine).
• USS Rush (United States Navy): The patrol vessel struck a submerged log at League Island Navy Yard and sank. She was declared a total loss.

9 December

• Adour (Norway): World War I: The cargo shp was sunk in the Mediterranean Sea 2 nautical miles (3.7 km) off the Isla Horminga Lighthouse, Spain (37°40′N 0°34′W) by SM U-64 (Kaiserliche Marine) with the loss of two crew.
• Costas (Greece): World War I: The cargo ship was sunk in the Mediterranean Sea off Cape Vaticano, Italy (38°44′N 15°34′E) by SM UC-53 (Kaiserliche Marine). Her crew survived.
• SM UB-18 (Kaiserliche Marine): World War I: The Type UB II submarine was rammed and sunk in the English Channel (49°17′N 5°47′W) by HMT Ben Lawer (Royal Navy) with the loss of all 24 crew.
• Venetia (United Kingdom of Great Britain and Ireland): World War I: The collier was torpedoed and sunk in the North Sea 3 nautical miles (5.6 km) north north west of Whitby, Yorkshire (54°32′N 0°39′W) by SM UB-75 (Kaiserliche Marine). Her crew survived.
• War Tune (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the English Channel 1.5 nautical miles (2.8 km) south south east of Black Head, Cornwall (49°59′N 5°05′W) by SM U-53 (Kaiserliche Marine) with the loss of a crew member.

10 December

• Antonio Magliulo (Kingdom of Italy): World War I: The sailing vessel was shelled and sunk in the Tyrrhenian Sea west of Naples (40°35′N 13°18′E) by SM UC-53 (Kaiserliche Marine).
• Crathorne (Norway): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea off Alicante, Spain (38°28′N 0°01′W) by SM U-64 (Kaiserliche Marine) with the loss of three of her crew.
• Forward (United Kingdom of Great Britain and Ireland): World War I: The fishing smack was scuttled in the North Sea off Aldeburgh, Suffolk by SM UB-17 (Kaiserliche Marine). Her crew survived.
• Øiekast (Norway): World War I: The coaster was sunk in the English Channel 25 nautical miles (46 km) north east of Barfleur, Manche, France by SM U-53 (Kaiserliche Marine). Her crew survived.
• Owasco (United States): World War I: The cargo ship was sunk in the Mediterranean Sea off Alicante (38°28′N 0°13′W) by SM U-64 (Kaiserliche Marine) with the loss of two of her crew.
• SM UB-75 (Kaiserliche Marine): 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 (Austro-Hungarian Navy): World War I: The Monarch-class coastal defense ship 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 SM UB-55 (Kaiserliche Marine).
• Bard (Norway): World War I: The coaster was torpedoed and sunk in the Atlantic Ocean off St. Agnes Head, Cornwall, United Kingdom (50°19′N 5°22′W) by SM U-60 (Kaiserliche Marine) with the loss of seven crew.
• D. A. Gordon (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea off Alicante, Soain (38°22′N 0°19′W) by SM U-64 (Kaiserliche Marine) with the loss of a crew member.
• Ligeiro (Portugal): World War I: The fishing vessel was sunk in the Atlantic Ocean off Leixões by SM UB-55 (Kaiserliche Marine).
• Minorca (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea off Cabo de las Huertas, Spain by SM U-64 (Kaiserliche Marine). Her crew survived.
• Oldfield Grange (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 30 nautical miles (56 km) north east of Tory Island, County Donegal (55°46′N 7°56′W) by SM U-62 (Kaiserliche Marine). Her crew survived.
• Persier (United Kingdom of Great Britain and Ireland): World War I: The collier was torpedoed and sunk in the Mediterranean Sea 50 nautical miles (93 km) east of Cape Spartivento, Calabria, Italy (37°58′N 17°09′E) by SM U-35 (Kaiserliche Marine) with the loss of a crew member.
• Portuguesa (Portugal): World War I: The sailing vessel was sunk in the Atlantic Ocean off Leixões by SM UB-55 (Kaiserliche Marine).
• Vigneira (or Virgeira) (Portugal): World War I: The fishing vessel was sunk in the Atlantic Ocean off Leixões by SM UB-55 (Kaiserliche Marine).

12 December

• Amadavat (United Kingdom of Great Britain and Ireland): 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°42′N 6°19′W) by SM UB-65 (Kaiserliche Marine). Her crew survived.
• Charleston (United Kingdom of Great Britain and Ireland): World War I: The collier was scuttled in St. George's Channel 30 nautical miles (56 km) west of The Smalls (51°37′N 5°59′W) by SM UB-65 (Kaiserliche Marine). Her crew survived, but two of them were taken as prisoners of war.
• HMT Commander Fullerton (Royal Navy): 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 Kaiserliche Marine).
• Cordova (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the Norwegian Sea 50 nautical miles (93 km) west of Bergen, Rogaland, Norway by SMS G101, SMS G103, SMS G104 and SMS V100 (all Kaiserliche Marine).
• USS Elizabeth (United States Navy): The patrol vessel collided with Northland (United States at Norfolk, Virginia and sank. She was subsequently salvaged, repaired and returned to service.
• Emanuele C. (Kingdom of Italy): World War I: The schooner was shelled and sunk in the Mediterranean Sea off Cape Bougaroun, Algeria (37°37′N 8°30′E) by SM U-34 (Kaiserliche Marine). Her crew survived.
• Emlyndene (United Kingdom of Great Britain and Ireland): World War I: The coaster was torpedoed and sunk in the English Channel east of Start Point, Devon by SM UC-50 (Kaiserliche Marine) with the loss of all fourteen of her crew.
• Francis Blanchflower (United Kingdom of Great Britain and Ireland): 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 (United Kingdom of Great Britain and Ireland): World War I: The trawler was shelled and sunk in the North Sea 10 nautical miles (19 km) east of the mouth of thr River Tyne by a Kaiserliche Marine torpedo boat destroyer with the loss of four of her crew.
• Leonatus (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the North Sea 2 nautical miles (3.7 km) east by south of the Bressay Lighthouse, Shetland Islands by SM UC-40 (Kaiserliche Marine). Her crew survived.
• HMT Livingstone (Royal Navy): The naval trawler was torpedoed, shelled and sunk in the Norwegian Sea by SMS G101, SMS G103, SMS G104 and SMS V100 (all Kaiserliche Marine).
• HMT Lord Alverstone (Royal Navy): The naval trawler was shelled and sunk in the Norwegian Sea by SMS G101, SMS G103, SMS G104 and SMS V100 (all Kaiserliche Marine).
• Maracaibo (Denmark ): World War I: The cargo ship was shelled and sunk in the Norwegian Sea 50 nautical miles (93 km) west of Bergen by SMS G101, SMS G103, SMS G104 and SMS V100 (all Kaiserliche Marine).
• Nike (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the North Sea 8 nautical miles (15 km) east of Blyth, Northumberland by SMS B97 and SMS B111 (both Kaiserliche Marine).
• HMS Partridge (Royal Navy): World War I: The Admiralty M-class destroyer was shelled and sunk in the Norwegian Sea by SMS G101, SMS G103, SMS G104 and SMS V100 (all Kaiserliche Marine). Twenty four survivors were rescued by the Germans.
• St. Croix (Norway): World War I: The cargo liner was torpedoed and damaged in the Bristol Channel 13 nautical miles (24 km) north west of Hartland Point, Devon, United Kingdom (50°49′N 4°49′W) by SM U-60 (Kaiserliche Marine) with the loss of two crew. She was taken under tow but sank the next day 10 nautical miles (19 km) south west by west of Hartland Point.
• HMT Tokio (Royal Navy): 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 Kaiserliche Marine).
• Torleif (Sweden): World War I: The cargo ship was shelled and sunk in the Norwegian Sea (59°43′N 4°10′E) by SMS G101, SMS G103, SMS G104 and SMS V100 (all Kaiserliche Marine).
• HMS Wolverine (Royal Navy): The Beagle-class destroyer collided with HMS Rosemary (Royal Navy) in the Atlantic Ocean north west of Ireland and sank.

13 December

• Arnewood (United Kingdom of Great Britain and Ireland): World War I: The collier struck a mine and sank in the Atlantic Ocean 4 nautical miles (7.4 km) east south east of Sleat Point, Skye (57°01′N 5°54′W). Her crew survived.
• Bangarth (United Kingdom of Great Britain and Ireland): World War I: The collier was torpedoed and sunk in the North Sea 13 nautical miles (24 km) north north east of the mouth of the River Tyne by SM UB-34 (Kaiserliche Marine) with the loss of two of her crew.
• Britannic (United Kingdom of Great Britain and Ireland): World War I: The sailing vessel was scuttled in the English Channel 12 nautical miles (22 km) north north west of the Les Hanois Lighthouse, Guernsey, Channel Islands (49°36′N 2°53′W) by SM UB-31 (Kaiserliche Marine). Her crew survived.
• Chili (France): World War I: The barque was damaged in the Atlantic Ocean 100 nautical miles (190 km) west of Ouessant, Finistère by SM UB-54 (Kaiserliche Marine). She sank the next day.
• Garthwaite (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the North Sea 4 nautical miles (7.4 km) east of Whitby, Yorkshire by SM UB-22 (Kaiserliche Marine) with the loss of fourteen crew.
• Karen (Norway): World War I: The cargo ship was sunk in the Mediterranean Sea 5 nautical miles (9.3 km) off Porto Anzio, Italy by SM UC-53 (Kaiserliche Marine) with the loss of a crew member.
• Little Gem (United Kingdom of Great Britain and Ireland): World War I: The schooner was sunk in the English Channell west of the Casquets, Channel Islands by SM U-87 (Kaiserliche Marine) with the loss of five of her crew.
• Noviembre (Spain): World War I: The cargo ship was sunk in the Bay of Biscay 10 nautical miles (19 km) off the mouth of the Gironde River, France (45°24′N 1°37′W) by SM U-102 (Kaiserliche Marine). Her crew survived.
• Ottokar (United Kingdom of Great Britain and Ireland): World War I: The coaster was sunk in the North Sea off Whitby by SM UB-38 (Kaiserliche Marine). Her crew survived.
• HMS Stephen Furness (Royal Navy): World War I: The armed boarding steamer was sunk in the Irish Sea west of the Isle of Man by SM UB-64 (Kaiserliche Marine) with the loss of 101 lives.
• SM U-75 (Kaiserliche Marine): 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

• Châteaurenault (French Navy): World War I: The protected cruiser was torpedoed and sunk in the Mediterranean Sea (38°15′N 20°22′E) by SM UC-38 (Kaiserliche Marine). The 1,162 survivors were rescued by Lansquenet, Mameluck and Rouen (all French Navy).
• Coila (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 3 nautical miles (5.6 km) south east of Canet Point, Spain (39°37′N 0°08′E) by SM U-64 (Kaiserliche Marine) with the loss of three of her crew.
• Hare (United Kingdom of Great Britain and Ireland): World War I: The coaster was torpedoed and sunk in the Irish Sea 7 nautical miles (13 km) off the Kish Lightship (United Kingdom of Great Britain and Ireland) by SM U-62 (Kaiserliche Marine) with the loss of twelve crew.
• Nor (Norway): World War I: The cargo ship was sunk in the Irish Sea (52°45′N 5°43′W) by SM UB-65 (Kaiserliche Marine) with the loss of two of her crew.
• SM UC-38 (Kaiserliche Marine): World War I: The Type UC II submarine was depth charged and sunk in the Mediterranean Sea (38°15′N 20°22′E) by Lansquenet (French Navy). There were twenty survivors.
• Volnay (United Kingdom of Great Britain and Ireland): World War I: The cargo ship struck a mine and sank in the Atlantic Ocean 2 nautical miles (3.7 km) south of The Manacles (50°04′N 5°03′W). Her crew survived.

15 December

• Bernard (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 180 nautical miles (330 km) west south west of the Bishop Rock, Isles of Scilly (48°40′N 9°58′W) by SM U-94 (Kaiserliche Marine) with the loss of a crew member.
• Dafni (Greece): World War I: The cargo ship was sunk in the North Sea 3 nautical miles (5.6 km) north north east of Hartlepool, County Durham, United Kingdom (54°44′N 1°09′W) by SM UB-34 (Kaiserliche Marine). Her crew survived.
• Formby (United Kingdom of Great Britain and Ireland): World War I: The passenger ship was sunk in the Irish Sea 20 nautical miles (37 km) north west of Bardsey Island, Pembrokeshire by SM U-62 (Kaiserliche Marine) with the loss of all 35 crew.
• Ioannina (Greece): World War I: The cargo ship was scuttled in the Atlantic Ocean 150 nautical miles (280 km) north west of Madeira, Portugal (34°40′N 19°45′W) by SM U-156 (Kaiserliche Marine).
• Maidag (Norway): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 22 nautical miles (41 km) south of the Wolf Rock, Cornwall, United Kingdom (49°36′N 5°36′W) by SM U-104 (Kaiserliche Marine) with the loss of three crew.

16 December

• HMS Arbutus (Royal Navy): World War I: The Anchusa-class sloop, operating as a Q-ship, was sunk in St. George's Channel (51°37′N 5°24′W) by SM UB-65 (Kaiserliche Marine) with the loss of nine of her crew.
• Bristol City (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was sunk in the Atlantic Ocean 250 nautical miles (460 km) west of Ouessant, Finistère, France (46°38′N 10°28′W) by SM U-94 (Kaiserliche Marine) with the loss of 30 of her crew.
• Foylemore (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the English Channel 22 nautical miles (41 km) east of The Lizard, Cornwall (49°58′N 4°38′W) by SM UB-55 (Kaiserliche Marine). Her crew survived.
• Greenhill (United Kingdom of Great Britain and Ireland): The collier was lost on this date.
• New York (Kingdom of Italy): World War I: The brigantine was shelled and sunk in the Mediterranean Sea off Cape San Vito, Sicily (38°14′N 12°55′E) by SM UB-49 (Kaiserliche Marine).
• San Francesco di Paola (Kingdom of Italy): World War I: The sailing vessel was sunk in the Mediterranean Sea off Cape San Vito by SM UB-49 (Kaiserliche Marine).

17 December

• Acoria (Portugal): World War I: The schooner was scuttled in the Atlantic Ocean south east of the Azores (35°10′N 18°20′W) by SM U-156 (Kaiserliche Marine). Her crew survived.
• Coningbeg (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was sunk in the Irish Sea 20 nautical miles (37 km) south west of Bardsey Island, Pembrokeshire by SM U-62 (Kaiserliche Marine) with the loss of all fifteen crew.
• HMT Duster (Royal Navy): The naval trawler was wrecked in Scratten Cove, Portreath, Cornwall.
• USS F-1 (United States Navy): The F-class submarine sank in the Pacific Ocean after a collision with USS F-3 (United States Navy) off Point Loma, California. Nineteen of her 22 crew were killed.
• Neptune (United Kingdom of Great Britain and Ireland): World War I: The fishing smack struck a mine and sank in the Atlantic Ocean 4.5 nautical miles (8.3 km) 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°36′N 27°16′E) by SM UB-53 (Kaiserliche Marine).

18 December

• Charles (United Kingdom of Great Britain and Ireland): 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.
• Riversdale (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the English Channel 1 nautical mile (1.9 km) south of Prawle Point, Devon by SM UB-31 (Kaiserliche Marine) with the loss of a crew member.

19 December

• HMT Annie (Royal Navy): The naval trawler was lost in the Mediterranean Sea on this date.
• Arno (Denmark): World War I: The cargo ship struck a mine and sank in the North Sea east south east of Aberdeen, United Kingdom (57°20′N 1°00′W). Her crew survived.
• Borgsten (Norway): World War I: The cargo ship was torpedoed and sunk in the English Channel 30 nautical miles (56 km) off Barfleur, Manche, France by SM UC-64 (Kaiserliche Marine). Her crew survived.
• Ingrid II (Norway): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 6 nautical miles (11 km) off Trevose Head, Cornwall, United Kingdom (50°36′N 5°11′W) by SM U-60 (Kaiserliche Marine) with the loss of ten crew.
• S. Giuseppe B. (Kingdom of Italy): World War I: The sailing vessel was sunk in the Mediterranean Sea by SM UB-50 (Kaiserliche Marine).
• Trevelyan (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and damaged in the English Channel 20 nautical miles (37 km) north of Cap Barfleur, Manche by SM UC-64 (Kaiserliche Marine). She was beached and was consequently declared a constructive total loss. Later repaired and returned to service.
• SM UB-56 (Kaiserliche Marine): World War I: The Type UB III submarine struck a mine and sank in the Strait of Dover (50°58′N 1°21′E) with the loss of all 37 crew.
• Vinovia (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 8 nautical miles (15 km) south of the Wolf Rock, Cornwall (49°56′N 5°33′W) by SM U-105 (Kaiserliche Marine) with the loss of nine crew.

20 December

• Alice Marie (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the English Channel 6 nautical miles (11 km) east north east of Start Point, Devon by SM UB-31 (Kaiserliche Marine). Her crew survived.
• Attualita (Kingdom of Italy): World War I: The cargo ship was sunk in the Gulf of Genoa off Arma di Taggia, Liguria (43°49′N 7°53′E) by SM UB-49 (Kaiserliche Marine). Her crew survived.
• Eveline (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the English Channel 9.5 nautical miles (17.6 km) south of Berry Head, Devon by SM UB-31 (Kaiserliche Marine). Her crew survived.
• Fiscus (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 10 nautical miles (19 km) north north east of Cape Ivi, Algeria by SM U-35 (Kaiserliche Marine) with the loss of a crew member.
• Kintuck (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 8 nautical miles (15 km) north west by north of the Godrevy Lighthouse, Cornwall by a Kaiserliche Marine submarine with the loss of a crew member.
• Noris (Norway): World War I: The coaster was sunk in the English Channel 10 nautical miles (19 km) off Port-en-Bessin, Calvados, France by SM UB-54 (Kaiserliche Marine) with the loss of fourteen crew.
• Polvarth (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 35 nautical miles (65 km) west of Ouessant, Finistère, France (48°20′N 6°00′W) by SM U-86 (Kaiserliche Marine) with the loss of two of her crew.
• Regin (Norway): World War I: The cargo ship was sunk in the Gulf of Genoa 1 nautical mile (1.9 km) south of Cape Mele, Liguria by SM UB-49 (Kaiserliche Marine) with the loss of a crew member.
• Suruga (United States): World War I: The cargo ship was damaged in the Gulf of Genoa by SM UB-49 (Kaiserliche Marine). She was beached at San Remo, Liguria. Later refloated, repaired and returned to service.
• Warsaw (United Kingdom of Great Britain and Ireland): World War I: The coaster was torpedoed and sunk in the English Channel 4 nautical miles (7.4 km) south east by east of Start Point by SM UB-31 (Kaiserliche Marine) with the loss of seventeen crew.
• Waverley (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 33 nautical miles (61 km) north east of Cape Ivi (36°37′N 0°33′E) by SM U-35 (Kaiserliche Marine) with the loss of 22 crew.

21 December

• Boa Vista (Portugal): World War I: The cargo ship was torpedoed and sunk in the Bay of Biscay 5 nautical miles (9.3 km) south west of the Île d'Yeu, Vendée, France (46°37′N 2°33′W) by SM U-88 (Kaiserliche Marine) with the loss of two of her crew. Survivors were rescued by Sauterelle (French Navy).
• City of Lucknow (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 50 nautical miles (93 km) north east by east of the Cani Rocks by SM UB-50 (Kaiserliche Marine). Her crew survived.
• HMT Ocean Scout I (Royal Navy): The naval trawler collided with another vessel and sank in the Atlantic Ocean west of Ireland.
• Orne (France): World War I: The coaster was sunk in the English Channel 25 nautical miles (46 km) west of Portland Bill, Dorset, United Kingdom by SM UB-54 (Kaiserliche Marine). Her crew survived.
• Spro (Norway): World War I: The cargo ship was sunk in the Bay of Biscay 4 nautical miles (7.4 km) off the Glénan Islands, Finistère, France (47°36′N 4°04′W) by SM U-104 (Kaiserliche Marine) with the loss of twelve crew.
• Stromboli (Kingdom of Italy): World War I: The cargo ship was sunk in the Gulf of Genoa off Cape Mele, Liguria (43°57′N 8°12′E) by SM UB-49 (Kaiserliche Marine).

22 December

• Clan Cameron (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the English Channel 23 nautical miles (43 km) south west of Portland Bill, Dorset by SM UB-58 (Kaiserliche Marine).
• Colemere (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in St. George's Channel 35 nautical miles (65 km) west of the Smalls Lighthouse by SM U-105 (Kaiserliche Marine) with the loss of four crew.
• Mabel Baird (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 4 nautical miles (7.4 km) west south west of The Lizard, Cornwall (49°57′N 5°17′W) by SM UB-57 (Kaiserliche Marine) with the loss of five of her crew.
• Piemonte (Kingdom of Italy): World War I: The cargo ship was damaged in the Gulf of Genoa south of Livorno, Tuscany by SM UB-49 (Kaiserliche Marine). She was beached but was later salvaged.

23 December

• Caboto (Kingdom of Italy): World War I: The cargo ship was sunk in the Gulf of Genoa 20 nautical miles (37 km)north of Polpulonia, Tuscany by SM UB-49 (Kaiserliche Marine).
• Grantley Hall (United Kingdom of Great Britain and Ireland): World War I: The cargo ship struck a mine and sank in the North Sea 5 nautical miles (9.3 km) east of Orfordness, Suffolk. Her crew survived.
• Hilda Lea (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the English Channel 24 nautical miles (44 km) south by east of St. Catherine's Point, Isle of Wight by SM UB-35 (Kaiserliche Marine) with the loss of a crew member.
• Pietro (Kingdom of Italy): World War I: The cargo ship was sunk in the Mediterranean Sea off Puerto Mazarrón, Murcia, Spain (37°28′N 1°10′W) by SM U-35 (Kaiserliche Marine).
• Ragna (Norway): World War I: The cargo ship was sunk in the English Channel 16 nautical miles (30 km) north west of the Cap de La Heve Lighthouse, Seine-Maritime, France by SM UB-54 (Kaiserliche Marine). Her crew survived.
• HMS Surprise (Royal Navy): World War I: The Yarrow Later M-class destroyer struck a mine and sank in the North Sea off the coast of the Netherlands.
• HMS Tornado (Royal Navy): The R-class destroyer struck a mine and sank in the North Sea off the coast of the Netherlands.
• HMS Torrent (Royal Navy): The R-class 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 nautical miles (65 km) west of the Bishop Rock, Isles of Scilly, United Kingdom by SM UB-57 (Kaiserliche Marine). Her crew survived.

24 December

• Canova (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk 15 nautical miles (28 km) south of Mine Head, Ireland by SM U-105 (Kaiserliche Marine) with the loss of seven crew.
• Daybreak (United Kingdom of Great Britain and Ireland: World War I: The cargo ship was torpedoed and sunk in the Irish Sea 1 nautical mile (1.9 km) east of the South Rock Lightship (United Kingdom of Great Britain and Ireland) by SM U-87 (Kaiserliche Marine) with the loss of 21 of her crew.
• Luciston (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and damaged in the English Channel 1.5 nautical miles (2.8 km) west by south of the Owers Lightship (United Kingdom of Great Britain and Ireland) by SM UC-71 (Kaiserliche Marine) with the loss of a crew member. She was beached was declared a total loss. The wreck was dispersed in December 1923.
• HMS Penshurst (Royal Navy): World War I: The Q-ship was torpedoed and sunk in the Bristol Channel (51°38′N 5°48′W) by SM U-110 (Kaiserliche Marine) with the loss of two crew.
• Turnbridge (United Kingdom of Great Britain and Ireland): World War I: The collier was torpedoed and sunk in the Mediterranean Sea 34 nautical miles (63 km) north east by north of Cape Ivi, Algeria (36°37′N 0°24′E) by SM U-35 (Kaiserliche Marine) with the loss of a crew member.

25 December

• Agberi (United Kingdom of Great Britain and Ireland): World War I: The Elder Dempster 3,463 grt ocean liner was torpedoed and sunk in St. George's Channel 18 nautical miles (33 km) north west of Bardsey Island, Pembrokeshire by SM U-87 (Kaiserliche Marine) en route from Dakar to Liverpool. There were no casualties.
• Ajax (Denmark): World War I: The cargo ship was torpedoed and sunk in the Bay of Biscay off Audiere, Finistère (47°53′N 4°32′W) by SM U-104 (Kaiserliche Marine) with the loss of eleven crew.
• Argo (United Kingdom of Great Britain and Ireland): World War I: The collier was torpedoed and sunk in the Mediterranean Sea 18 nautical miles (33 km) north west of Cape Ténès, Algeria (36°42′N 1°01′E) by SM U-35 (Kaiserliche Marine). Her crew survived.
• Cliftondale (United Kingdom of Great Britain and Ireland): World War I: The collier was torpedoed and sunk in the Mediterranean Sea 36 nautical miles (67 km) east by north of Cape Ténès by SM U-35 (Kaiserliche Marine) with the loss of three crew.
• Espagne (Belgium): World War I: The cargo ship was sunk in the English Channel off St. Catherine's Point, Isle of Wight, United Kingdom (50°26′N 1°29′W) by SM UC-71 (Kaiserliche Marine).
• Hekla (Denmark): World War I: The coaster struck a mine and sank in the Mediterranean Sea 3 nautical miles (5.6 km) south west of Cape Palinuro, Italy (39°50′N 15°42′E) with the loss of thirteen of her crew.
• Nordpol (Norway): World War I: The cargo ship was sunk in the Mediterranean Sea 30 nautical miles (56 km) off Cape Cherchell, Algeria (37°02′N 2°02′E) by SM U-35 (Kaiserliche Marine). Her crew survived.
• Sant' Antonio (Kingdom of Italy): World War I: The barque was shelled and sunk in the Mediterranean Sea off the coast of Algeria by SM UB-50 (Kaiserliche Marine).
• SM U-87 (Kaiserliche Marine): 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 Royal Navy) with the loss of all 44 crew.
• Umballa (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the Gulf of Policastro 8 nautical miles (15 km) south of Cape Scala, Italy (39°46′N 15°39′E) by SM UB-49 (Kaiserliche Marine). Her crew survived.

26 December

• Benito (United Kingdom of Great Britain and Ireland): World War I: Convoy OF 18: The cargo ship was torpedoed and sunk in the English Channel 9 nautical miles (17 km) south of Dodman Point, Cornwall (50°04′N 4°45′W) by SM UB-57 (Kaiserliche Marine). Her crew survived.
• Lydia (Portugal): World War I: The sailing vessel was sunk in the Atlantic Ocean south of Faial Island, Azores (37°50′N 28°40′W) by SM U-157 (Kaiserliche Marine). Her crew survived.
• Skaala (Norway): World War I: The cargo ship was torpedoed and sunk in the English Channel 4 nautical miles (7.4 km) west of Prawle Point, Devon, United Kingdom (50°11′N 3°50′W) by SM UB-35 (Kaiserliche Marine) with the loss of a crew member.
• Tregenna (United Kingdom of Great Britain and Ireland): World War I: Convoy OF 18: The cargo ship was torpedoed and sunk in the English Channel 9 nautical miles (17 km) south of Dodman Point (50°04′N 4°45′W) by SM UB-57 (Kaiserliche Marine). Her crew survived.

27 December

• Adela (United Kingdom of Great Britain and Ireland): World War I: The coaster was torpedoed and sunk in the Irish Sea 12 nautical miles (22 km) north west of The Skerries, Isle of Anglesey by SM U-100 (Kaiserliche Marine) with the loss of 24 of her crew.
• P.L.M. 4 (France): World War I: The cargo ship was sunk in the English Channel 28 nautical miles (52 km) north east of Barfleu, Seine-Maritime by SM UC-71 (Kaiserliche Marine).

28 December

• Alfred H. Read (United Kingdom of Great Britain and Ireland): World War I: The pilot vessel struck a mine and sank in the River Mersey with the loss of 39 lives.
• Chirripo (United Kingdom of Great Britain and Ireland): World War I: The cargo ship struck a mine and sank in Belfast Lough. Her crew survived.
• Clara (United Kingdom of Great Britain and Ireland): World War I: The collier was torpedoed and sunk in the English Channel (50°11′N 5°36′W) by SM UB-57 (Kaiserliche Marine). Her crew survived.
• Dauno (Kingdom of Italy): World War I: The coaster was sunk in the Mediterranean Sea east of Benghazi, Libya by SM UC-73 (Kaiserliche Marine).
• Fallodon (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the English Channel 12 nautical miles (22 km) south south east of St. Catherine's Point, Isle of Wight (50°26′N 1°06′W) by SM UC-71 (Kaiserliche Marine) with the loss of a crew member.
• Lord Derby (United Kingdom of Great Britain and Ireland): World War I: The collier was torpedoed and sunk in St. George's Channel 7 nautical miles (13 km) south west by south of St. Anns Head by SM U-105 (Kaiserliche Marine) with the loss of three crew.
• Magellan (France): World War I: The cargo ship was sunk in the Atlantic Ocean 166 nautical miles (307 km) north west of Cape Finisterre, Spain (43°10′N 13°32′W) by SM U-43 (Kaiserliche Marine).
• Maxton (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 28 nautical miles (52 km) north of Malin Head, County Donegal by SM U-19 (Kaiserliche Marine) with the loss of a crew member.
• HMT Piscatorial II (Royal Navy): World War I: The naval trawler struck a mine and sank in the English Channel 7 nautical miles (13 km) south west of Brighton, East Sussex with the loss of all ten of her crew.
• Robert Eggleton (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in St. George's Channel 10 nautical miles (19 km) south west of Bardsey Island, Pembrokeshire by SM U-91 (Kaiserliche Marine). Her crew survived.
• Santa Amalia (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 30 nautical miles (56 km) north north east of Malin Head by SM U-19 (Kaiserliche Marine) with the loss of 43 crew.

29 December

• Ennismore (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the North Sea 15 nautical miles (28 km) south east of Buchan Ness, Aberdeenshire (57°17′N 1°25′W) by SM UC-58 (Kaiserliche Marine) with the loss of ten of her crew.
• Patria (Russian Empire): World War I: The cargo ship was sunk in the North Sea 8 nautical miles (15 km) off Hartlepool, County Durham, United Kingdom by SM UB-21 (Kaiserliche Marine).
• Peregrine (United Kingdom of Great Britain and Ireland): The passenger ship ran aground in the North Sea 14 nautical miles (26 km) off Walton-on-the-Naze, Essex. All 88 people on board were rescued by the Walton Lifeboat.
• HMT Sapper (Royal Navy): World War I: The naval trawler struck a mine and sank in the English Channel off the Owers Lightship (United Kingdom of Great Britain and Ireland) (50°37′N 0°41′W) with the loss of all nineteen crew.
• Tiro (Norway): World War I: The cargo ship was sunk in the Atlantic Ocean 7 nautical miles (13 km) north west by west of The Lizard, Cornwall, United Kingdom (49°56′N 5°23′W) by SM UB-57 (Kaiserliche Marine). Her crew survived.

30 December

• Aragon (United Kingdom of Great Britain and Ireland): World War I: The troopship was torpedoed and sunk in the Mediterranean Sea off Alexandria, Egypt (31°18′N 29°48′E) by SM UC-34 (Kaiserliche Marine) with the loss of 610 lives.
• HMS Attack (Royal Navy): World War I: The Acheron-class destroyer was torpedoed and sunk in the Mediterranean Sea off Alexandria (31°18′N 29°49′E) by SM UC-34 (Kaiserliche Marine) whilst rescuing survivors from Aragon (United Kingdom of Great Britain and Ireland). Ten of her 70 crew were killed.
• Hercules (United Kingdom of Great Britain and Ireland): World War I: The collier was torpedoed and sunk in the North Sea 3 nautical miles (5.6 km) east north east of Whitby, Yorkshire (54°32′N 0°39′W) by SM UB-21 (Kaiserliche Marine) with the loss of twelve of her crew.
• Joachim Mumbru (Spain): World War I: The cargo ship was sunk in the Atlantic Ocean south of Madeira, Portugal (31°17′N 17°20′W) by SM U-156 (Kaiserliche Marine).
• Zone (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 4 nautical miles (7.4 km) off St. Ives, Cornwall (50°16′N 5°29′W) by SM U-110 (Kaiserliche Marine). Her crew survived.

31 December

• USS Fli-Hawk (United States Navy): The patrol boat collided with Gratitude (United States) at Norfolk, Virginia and sank. She was subsequently raised, repaired and returned to service.
• Lily (Greece): World War I: The cargo ship was sunk in the Mediterranean Sea 50 nautical miles (93 km) west of Port Said, Egypt (32°12′N 32°08′E) by SM UB-53 (Kaiserliche Marine).
• HMS Osmanieh (Royal Navy): World War I: The fleet messenger struck a mine and sank at Alexandria, Egypt with the loss of 198 lives.
• Vigrid (Norway): World War I: The cargo ship was torpedoed and sunk in the English Channel 10 nautical miles (19 km) north west of The Lizard, Cornwall, United Kingdom (50°03′N 5°55′W) by SM U-95 (Kaiserliche Marine) with the loss of five of her crew.
• Westville (United Kingdom of Great Britain and Ireland): World War I: The cargo ship was torpedoed and sunk in the English Channel 5 nautical miles (9.3 km) west south west of St. Catherine's Point, Isle of Wight (50°32′N 1°25′W) by SM UB-35 (Kaiserliche Marine). Her crew survived.