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- 0001-02-02 (xsd:gMonthDay)
- 0001-02-23 (xsd:gMonthDay)
- World War I: The cargo ship was sunk in the Atlantic Ocean west of Ouessant, Finistère by . Her crew survived. (en)
- World War I: The trawler was scuttled in the North Sea east by south of Aberdeen by . Her crew survived. (en)
- World War I: The sailing vessel was sunk in the Strait of Sicily by . (en)
- The naval trawler was lost on this date. (en)
- World War I: The Type 1915 minesweeper struck a mine and sank in the North Sea. (en)
- World War I: The trawler was scuttled in the North Sea east north east of the mouth of the River Tyne by . Her crew survived. (en)
- World War I: The sailing vessel was scuttled in the English Channel north east of Alderney, Channel Islands by . Her crew survived. (en)
- World War I: The coaster was shelled and sunk in the English Channel north west of Cayeux-sur-Mer, Somme, France by . Her crew survived. (en)
- World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean west by north of the Fastnet Rock by . Her crew survived. (en)
- World War I: The schooner was sunk in the Atlantic Ocean off Ouessant, Finistère by . Her crew survived. (en)
- World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean south west of Bishop Rock, Isles of Scilly by . Her crew survived. (en)
- World War I: The schooner was scuttled in the English Channel off Étretat, Seine-Inférieure by . Her crew survived. (en)
- The troopship was rammed and sunk in the English Channel off St Catherine's Point, Isle of Wight by . A total of 646 passengers and crew were killed. Survivors were rescued by . (en)
- World War I: The cargo ship was torpedoed and sunk in the North Sea east of Whitby, Yorkshire by with the loss of a crew member. (en)
- World War I: The barque was scuttled in the Bay of Biscay east of Santander, Cantabria, Spain by . Her crew survived. (en)
- The tug foundered in Tees Bay with the loss of six of her crew. (en)
- World War I: The fishing smack was scuttled in the Atlantic Ocean west of Trevose Head, Cornwall by . Her crew survived. (en)
- World World I: The trawler was shelled and sunk in the Bay of Biscay west of Arcachon, Gironde by with the loss of three of her crew. (en)
- World War I: The coaster was sunk in the Mediterranean Sea off the coast of Algeria by . Her crew survived. (en)
- World War I: The schooner struck a mine placed by and sank in the Irish Sea south of Skokholm, Pembrokeshire with the loss of four of her crew. (en)
- World War I: The cargo ship was sunk in the Atlantic Ocean west of Ouessant, Finistère, France by with the loss of all 33 crew. (en)
- The schooner barge foundered at anchor off Assateague Light in a storm, a total loss. The crew were rescued by Saratoga before sinking. (en)
- World War I: The fishing vessel was scuttled in the English Channel west of Berck, Pas-de-Calais by . Her crew survived. (en)
- World War I: The cargo ship was sunk in the Mediterranean Sea north of Benghazi, Libya by . (en)
- World War I: The cargo ship was sunk in the North Sea east north east of Hartlepool, County Durham by with the loss of three of her crew. (en)
- World War I: The fishing vessel was sunk in the English Channel off Dieppe, Seine-Inférieure by . Her crew survived. (en)
- World War I: The cargo ship was sunk in the North Sea off Whitby, Yorkshire, United Kingdom by . (en)
- World War I: The tanker was torpedoed and sunk in the Atlantic Ocean west of the Fastnet Rock by . Her crew survived, but two of them were taken as prisoners of war. (en)
- World War I: The barque was sunk in the Atlantic Ocean south south west of the Fastnet Rock by . Her crew survived. (en)
- World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean west south west of the Fastnet Rock by with the loss of a crew member. (en)
- World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean west of the Fastnet Rock by with the loss of eleven crew. (en)
- World War I: The coaster was scuttled in the Irish Sea south south west of Bardsey Island, Pembrokeshire by . Her crew survived. (en)
- World War I: The naval trawler struck a mine placed by and sank in the English Channel south of Dartmouth, Devon with the loss of twelve of her crew. (en)
- World War I: The cargo ship was sunk in the Bay of Biscay off Groix, Morbihan by . Her crew survived. (en)
- World War I: The trawler struck a mine placed by and sank in the North Sea south south west of Tod Head, Aberdeenshire with the loss of nine of her crew. (en)
- World War I: The tanker was shelled and sunk in the Atlantic Ocean west by north of the Fastnet Rock by with the loss of a crew member. (en)
- World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean south south west of the Bishop Rock, Isles of Scilly by . Her crew survived. (en)
- World War I: The collier struck a mine and sank in the Atlantic Ocean south of Dassen Island, South Africa. (en)
- World War I: The auxiliary cruiser was scuttled in the South Atlantic Ocean near Ilha da Trindade. (en)
- World War I: The fishing vessel was shelled and sunk in the North Sea north east by north of North Shields, Northumberland by . Her crew survived, but her captain was taken as a prisoner of war. (en)
- The cargo ship foundered in the Kattegat north of Höganäs, Skåne County, Sweden. (en)
- World War I: The sailing vessel was shelled and sunk in the English Channel north of Ver-sur-Mer, Calvados by . (en)
- World War I: The collier was torpedoed and sunk in the Mediterranean Sea south east by south of Malta by with the loss of eleven crew. (en)
- World War I: The trawler was sunk in the North Sea east north east of the mouth of the River Tyne by . Her crew survived. (en)
- World War I: The cargo ship was sunk in the Mediterranean Sea off Algiers, Algeria by . Her crew survived. (en)
- World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean west of the Fastnet Rock by with the loss of seven of her crew. Five survivors were taken as prisoners of war. (en)
- World War I: The cargo ship struck a mine placed by and sank in the North Sea east north east of the Shipwash Lightship with the loss of eight of her crew. (en)
- The schooner barge, in tow of , sank in a gale and snowstorm off Highlands, New Jersey. Lost with all five hands. (en)
- World War I: The barque was shelled and sunk in the Mediterranean Sea east of Solenzara, Corsica, France by . Her crew survived. (en)
- World War I: The collier was torpedoed and sunk in the Mediterranean Sea north of Cape Falcon, Algeria by . Her crew survived, but her captain was taken as a prisoner of war. (en)
- World War I: The sailing vessel was sunk in the Bay of Biscay west south west of the La Coubre Lighthouse, Charente-Maritime by . (en)
- World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea north of Cape Carbon, Algeria by with the loss of eighteen crew. (en)
- World War I: The cargo ship struck a mine placed by and sank in the Thames Estuary with the loss of a crew member. (en)
- World War I: The four-masted barque was shelled and sunk in the Atlantic Ocean south south west of the Fastnet Rock by . Her crew survived. (en)
- The steamer stranded off Castle Island, British West Indies. Later refloated by the wrecking steamer . (en)
- World War I: The fishing vessel was sunk in the English Channel west of Étaples, Pas-de-Calais by . (en)
- World War I: The barque was sunk in the Atlantic Ocean south of Ireland by . (en)
- World War I: The collier was torpedoed and sunk in the English Channel south west of Portland Bill, Dorset by . Her crew survived. (en)
- World War I: The coaster was sunk in the North Sea off Aberdeen by with the loss of eighteen of her crew. (en)
- World War I: The cargo ship was torpedoed and sunk in the North Sea off Whitby by with the loss of fifteen crew. (en)
- World War I: The full-rigged ship was sunk in the Atlantic Ocean west south west of the Fastnet Rock by . Her crew survived. (en)
- World War I: The trawler was scuttled in the Atlantic Ocean north of Inishtrahull Island, County Donegal by . Her crew survived, but two of them were taken as prisoners of war. (en)
- World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean west of the Isles of Scilly by with the loss of seven of her crew. (en)
- World War I: The cargo ship was sunk in the Mediterranean Sea off Marettimo, Italy by . (en)
- World War I: The cargo ship was scuttled in the Atlantic Ocean north west of the Bishop's Rock by . (en)
- World War I: The sailing vessel was sunk in the Atlantic Ocean off Ouessant, Finistère by . (en)
- World War I: The sailing vessel was scuttled in the Atlantic Ocean north west of the St Paul Rocks, Brazil by . (en)
- World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean south west of the Fastnet Rock by . Her crew survived, but her captain was taken as a prisoner of war. (en)
- The steamer left Salina Cruz, Mexico for Ocus, Guatemala and disappeared. (en)
- World War I: The sailing vessel was shelled and sunk in the Mediterranean Sea east of Solenzara by . (en)
- The naval drifter/Vorpostenboot was lost on this date. (en)
- World War I: The trawler was shelled and sunk in the North Sea east by south of Aberdeen by . Her crew survived. (en)
- World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean south west of Hartland Point, Devon by with the loss of three of her crew. (en)
- World War I: The cargo ship was scuttled in the Bay of Biscay off Punta Galea, Biscay by . Her crew survived. (en)
- The F-class submarine sank in the Ligurian Sea off La Spezia, Italy, during trials. She was refloated and repaired and she returned to service in September 1917. (en)
- World War I: The cargo ship was torpedoed and sunk in the North Sea north of Flamborough Head, Yorkshire, United Kingdom by . Her crew survived. (en)
- World War I: The coaster was sunk in the English Channel north north west of Le Tréport, Seine-Inférieure by . Her crew survived. (en)
- World War I: The sailing vessel was sunk in the English Channel off The Needles, Isle of Wight, United Kingdom by . (en)
- World War I: The sailing vessel struck a mine placed by and sank in the Tyrrhenian Sea. (en)
- The barge went ashore in a gale on the coast of California, a total loss. (en)
- World War I: The cargo ship was torpedoed and sunk in the Bristol Channel off the Pendeen Lighthouse, Cornwall by . (en)
- World War I: The passenger ship was scuttled in the Irish Sea north by east of Strumble Head, Pembrokeshire by . Her crew survived. (en)
- World War I: The barque was shelled and sunk in the Atlantic Ocean west of the Fastnet Rock by with the loss of eleven crew. (en)
- World War I: The cargo ship was sunk in the Atlantic Ocean west north west of the Fastnet Rock by . Her crew survived. (en)
- World War I: The fishing smack was shelled and sunk in the Atlantic Ocean south south east of the Eddystone Lighthouse by . Her crew survived. (en)
- World War I: The topsail schooner was sunk in the English Channel south of The Lizard, Cornwall, United Kingdom by . (en)
- World War I: The cargo ship was torpedoed and damaged in the English Channel off the Royal Sovereign Lightship by . She was beached but was later refloated, repaired and returned to service. (en)
- World War I: The three-masted schooner was scuttled in the Bay of Biscay west of Pointe de la Coubre, Charente-Maritime by . (en)
- The barge broke loose and went ashore after her tow vessel, , grounded on rocks in fog in an unknown location. (en)
- World War I: The cargo ship struck a mine and sank in the Indian Ocean south west of Colombo, Ceylon with the loss of two of her crew. (en)
- World War I: The cargo ship was shelled and sunk in the Atlantic Ocean north west by west of the Fastnet Rock by . Her crew survived, but her captain was taken as a prisoner of war. (en)
- World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean west of the Fastnet Rock by with the loss of 23 of her crew. (en)
- World War I: The collier struck a mine placed by and sank in the North Sea south by west of the Shipwash Lightship . Her crew survived. (en)
- World War I: The coaster was sunk in the Bay of Biscay west of La Rochelle, Charente-Maritime, France by . Her crew survived. (en)
- World War I: The fishing vessel was scuttled in the North Sea east by north of Aberdeen by . Her crew survived, but her captain was taken as a prisoner of war. (en)
- World War I: The auxiliary sailing vessel was shelled and sunk in the Atlantic Ocean north west of Ireland by . Her crew were rescued by . (en)
- World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean west of the Fastnet Rock by with the loss of two of her crew. (en)
- World War I: The cargo ship was sunk in the North Sea east north east of Noup Head, Orkney Islands, United Kingdom by . Her crew survived. (en)
- World War I: The cargo ship, on her maiden voyage, was sunk in the Atlantic Ocean east by north of Cape Frio, Brazil by . Her crew were taken as prisoners of war. (en)
- World War I: The sailing vessel was sunk in the Atlantic Ocean north north west of the St Paul Rocks, Brazil by . (en)
- World War I: The dredger struck a mine placed by and sank in the English Channel off Newhaven, Sussex. Her crew survived. (en)
- World War I: The sailing vessel was sunk in the Mediterranean Sea north of Ibiza, Spain by . Her crew survived. (en)
- World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean west of the Fastnet Rock by with the loss of four crew. (en)
- World War I: The cargo ship was shelled and damaged in the Atlantic Ocean (en)
- World War I: The fishing vessel was shelled and sunk in the North Sea off Norfolk by . Her crew survived. (en)
- World War I: The barque was captured and sunk by off Brazil. (en)
- World War I: The cargo ship was sunk in the English Channel south west of Start Point, Devon by . Her crew survived. (en)
- World War I: The collier was torpedoed and sunk in the Bay of Biscay north west of Belle Île by with the loss of a crew member. (en)
- World War I: The barque was sunk in the Atlantic Ocean off the Isles of Scilly, United Kingdom by . Her crew survived. (en)
- The naval drifter/net vessel was lost in a collision off the Owers Lightship . (en)
- World War I: The cargo ship was scuttled in the English Channel by . Her crew survived. (en)
- World War I: The passenger ship struck a mine placed by and sank in the North Sea off the Galloper Lightship . (en)
- World War I: The schooner was sunk in the English Channel off Triagoz, Côtes-du-Nord by . (en)
- World War I: The naval trawler struck a mine placed by and sank in the English Channel south of the Owers Lightship with the loss of twelve of her crew. (en)
- World War I: The cargo ship was sunk in the Atlantic Ocean off the Isles of Scilly, United Kingdom by . Her crew survived. (en)
- World War I: The tanker was sunk in the Atlantic Ocean west of Mizen Head, County Cork by with the loss of all 29 crew. (en)
- World War I: The cargo ship was sunk in the English Channel north west of Cap la Heve, Seine-Inférieure by with the loss of nine of her crew. (en)
- World War I: The naval trawler struck a mine placed by and sank in the North Sea north east of Aldeburgh, Suffolk with the loss of seven of her crew. (en)
- World War I: The trawler was scuttled in the North Sea east by south of Girdle Ness, Aberdeenshire by . Her crew survived. (en)
- World War I: The cargo ship was sunk in the Tyrrhenian Sea south of Rome by . Her crew survived. (en)
- World War I: The trawler was scuttled in the North Sea east of Berwick-upon-Tweed, Northumberland by . Her crew survived. (en)
- World War I: The auxiliary schooner was shelled and sunk in the English Channel south of Portland Bill, Dorset by . Her crew survived. (en)
- World War I: The naval trawler struck a mine placed by UC 33 and sank in the Irish Sea off the Daunts Rock Lightship with the loss of thirteen of her crew. (en)
- World War I: The cargo ship was scuttled in the Atlantic Ocean south west of Ouessant by with the loss of fifteen of her crew. (en)
- World War I: The fishing smack was sunk in the Atlantic Ocean south east by south of the Eddystone Lighthouse by . Her crew survived. (en)
- World War I: The barquentine was sunk in the English Channel by . Her crew survived. (en)
- World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean off Land's End, Cornwall by . Her crew were rescued by . (en)
- World War I: The cargo ship was sunk in the Bay of Biscay by . Her crew survived. (en)
- World War I: The fishing vessel was scuttled in the North Sea south of Fair Isle by . Her captain was taken as a prisoner of war. (en)
- World War I: The cargo ship was scuttled in the Irish Sea east by north of the South Bishop Lighthouse, Pembrokeshire by . Her crew survived. (en)
- World War I: The fishing vessel was scuttled in the North Sea off Inchcape, Forfarshire by . Her crew survived. (en)
- World War I: The cargo ship was sunk in the Atlantic Ocean west of the Île d'Yeu, Vendée by with the loss of 21 crew. (en)
- The coaster was torpedoed and sunk in the North Sea south east of Hartlepool, County Durham by with the loss of ten crew. (en)
- The auxiliary river gunboat was lost on this date. (en)
- World War I: The naval trawler struck a mine placed by and sank in Tees Bay with the loss of ten of her crew. (en)
- World War I: The barquentine was scuttled in the English Channel south of Anvil Point, Dorset by . Her crew survived. (en)
- World War I: The schooner was sunk in the English Channel north of Ouessant by . Her crew survived. (en)
- World War I: The cargo ship was scuttled in the Bay of Biscay off Pointe de la Coubre, Gironde, France by with the loss of fifteen crew. Four survivors were rescued by the fishing vessel Mamelena . (en)
- World War I: The auxiliary schooner was sunk in the North Sea by . Her crew survived. (en)
- World War I: The fleet messenger struck a mine placed by and sank in Mudros Bay with the loss of 33 lives (en)
- World War I: The cargo ship was scuttled in the Atlantic Ocean north west of the Bishop's Rock by . Her crew survived. (en)
- The collided with Astore and sank in the Mediterranean Sea off Stromboli. (en)
- The cargo ship collided with a Greek merchant vessel in the Bay of Biscay off Biarritz, Basses-Pyrénées, France and sank. Her crew were rescued. (en)
- World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean south west of the Fastnet Rock by with the loss of two of her crew. Her captain was taken as a prisoner of war. (en)
- World War I: the naval trawler struck a mine placed by and sank in the North Sea east of the Shipwash Lightship with the loss of seven of her crew. (en)
- World War I: The cargo ship was torpedoed and sunk in the English Channel south of Portland Bill by with the loss of eleven of her crew. (en)
- World War I: The cargo ship was sunk in the English Channel north of Ouessant, Finistère, France by . Her crew survived. (en)
- World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea south by west of Malta by . Her crew survived, but four survivors were taken as prisoners of war. (en)
- World War I: The ketch was shelled and sunk in the English Channel north north west of the Roches-Douvres Lighthouse, Côtes-du-Nord, France by . Her crew survived. (en)
- World War I: The naval trawler struck a mine placed by and sank in the Bristol Channel off Barry Island, Glamorgan with the loss of eight of her crew. (en)
- World War I: The sailing vessel was sunk in the Mediterranean Sea east of Siniscola, Sardinia by . (en)
- World War I: The cargo ship was sunk in the Atlantic Ocean south south west of the Fastnet Rock by . Her crew survived. (en)
- World War I: The cargo ship was sunk in the Atlantic Ocean west of Hartland Point by . (en)
- World War I: The troopship was torpedoed and sunk in the Atlantic Ocean north west by west of the Fastnet Rock by with the loss of twelve lives. (en)
- World War I: The sailing vessel was sunk in the Atlantic Ocean east north east of Cape Frio, Brazil by . Her crew were taken as prisoners of war. (en)
- World War I: The cargo ship was scuttled in the North Sea east by north of Spurn Point, Yorkshire by with the loss of a crew member. (en)
- World War I: The four-masted barque was scuttled in the Atlantic Ocean south west of Ireland by . Her crew survived. (en)
- World War I: The cargo ship was scuttled in the Irish Sea south west of Bardsey Island by . Her crew survived. (en)
- World War I: The barque was sunk in the Atlantic Ocean south west of the Fastnet Rock by . (en)
- World War I: The coaster was shelled and sunk in the North Sea north east of St Abb's Head, Berwickshire by . Her crew survived. (en)
- World War I: The coaster was scuttled in the Irish Sea north north east of the Bishops and Clerks Rocks by . Her crew survived. (en)
- World War I: The fishing lugger was sunk in the North Sea off the Terschelling Bank Lightship by . Her eight crew survived. (en)
- World War I: The cargo ship was torpedoed and sunk in the North Sea north east of Whitby, Yorkshire by with the loss of four of her crew. (en)
- World War I: The schooner was shelled and sunk in the Mediterranean Sea south east of Alicante, Spain by . (en)
- World War I: The sailing vessel was sunk in the Atlantic Ocean south west of the Isles of Scilly by . (en)
- World War I: The naval trawler struck a mine placed by and sank at Aberdeen with the loss of seven of her crew. (en)
- World War I: The struck a mine placed by and sank in the English Channel off Dungeness, Kent . There were five survivors out of her 79 crew. (en)
- World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean north west of Tearaght Island by with the loss of two crew. (en)
- World War I: The cargo ship was sunk in the Atlantic Ocean north west of the Bishop Rock, Isles of Scilly, United Kingdom by with the loss of a crew member. (en)
- World War I: The cargo ship struck a mine placed by and sank in the English Channel east of the Royal Sovereign Lightship . Her crew survived. (en)
- World War I: The naval trawler struck a mine placed by and sank in the English Channel off Le Havre, Seine-Inférieure. (en)
- World War I: The coaster was sunk in the North Sea off Dennis Head Old Beacon, North Ronaldsay, Orkney Islands, United Kingdom by . Her crew survived. (en)
- World War I: The cargo ship was sunk in the Atlantic Ocean north of the Créac'h Lighthouse, Ouessant, Finistère, France by with the loss of two crew. (en)
- World War I: The cargo ship was sunk in the Mediterranean Sea south of Alicante by . (en)
- World War I: The cargo ship was sunk in the Atlantic Ocean north of Ouessant by with the loss of seventeen crew. (en)
- World War I: The cargo ship struck a mine placed by and sank in the North Sea east of the Sunk Lightship with the loss of five of her crew. (en)
- World War I: The Q-ship was sunk in the English Channel west of Jersey Channel islands by . Her crew were rescued by . (en)
- World War I: The brigantine was scuttled in the Atlantic Ocean south west of the Fastnet Rock by . Her crew survived. (en)
- World War I: The full-rigged ship was scuttled in the Atlantic Ocean west of the Fastnet Rock by . Her crew survived. (en)
- World War I: The schooner was scuttled in the Atlantic Ocean south east by east of Cape St. Vincent, Portugal by . Her crew survived. (en)
- World War I: The full-rigged ship was sunk in the Atlantic Ocean south west of the Fastnet Rock by . Her crew survived. (en)
- The barge ran aground near Hog Island, Massachusetts. Refloated and returned to service. (en)
- World War I: The brigantine was scuttled in the Mediterranean Sea west of Marettimo, Italy by . Her crew survived. (en)
- World War I: The brigantine was shelled and sunk in the English Channel south of Anvil Point, Dorset by . Her crew survived. (en)
- World War I: The coaster was shelled and sunk in the Irish Sea south of Bardsey Island, Pembrokeshire by . Her crew survived. (en)
- World War I: The ocean liner was torpedoed and sunk in the Atlantic Ocean west of The Fastnet Rock by with the loss of 43 lives. (en)
- World War I: The fishing smack was scuttled in the Atlantic Ocean north north west of Trevose Head, Cornwall by . Her crew survived. (en)
- World War I: The barque was torpedoed and sunk in the Atlantic Ocean west of Ireland by . Her crew survived, three people were rescued by U-45. (en)
- World War I: The cargo ship was sunk in the English Channel off Barfleur, Manche by . (en)
- World War I: The sailing vessel was sunk in the Mediterranean Sea north west of Palermo by . (en)
- World War I: The passenger ship either struck a mine placed by or was torpedoed and damaged in the English Channel west of Portland Bill, Dorset with the loss of four lives. Her crew were rescued by the destroyer . Berrima was towed to Portland where she was repaired and returned to service. (en)
- World War I: The schooner was scuttled in the English Channel north north east of Cap d'Antifer, Manche, France by . Her crew survived. (en)
- World War I: The Augustenburg-class Vorpostenboot was sunk by mines south west of Fanø. (en)
- World War I: The Grasbrook-class Vorpostenboot was sunk by mines off Helgoland. (en)
- World War I: The tanker was torpedoed and damaged in the Irish Sea south south east of the South Bishop Lighthouse, Pembrokeshire by . She was beached at Milford Haven and was later refloated. (en)
- World War I: The converted minelayer struck a mine placed by and sank in the Strait of Bonifacio with the loss of 88 of her crew. (en)
- World War I: The trawler was sunk in the North Sea east by south of Aberdeen by . Her crew survived. (en)
- World War I: The cargo ship was scuttled in the Atlantic Ocean south west of Ar Men, Finistère, France by . Her crew survived. (en)
- World War I: The troopship was sunk in the Ionian Sea off Cape Matapan, Greece by with the loss of 870 lives. (en)
- World War I: The cargo ship was sunk in the English Channel south of the Owers Lightship by . Her crew survived. (en)
- World War I: The collier was shelled and sunk in the English Channel east of the Lizard, Cornwall by . Her crew survived. (en)
- World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean south by west of the Fastnet Rock by with the loss of two crew. Four survivors were taken as prisoners of war. (en)
- World War I: The cargo ship was sunk in the North Sea south east of Flamborough Head, Yorkshire by with the loss of two of her crew. (en)
- World War I: The collier was torpedoed and sunk in the Atlantic Ocean south by east of Galley Head, County Cork by . Her crew survived. (en)
- World War I: The trawler was torpedoed and sunk in the North Sea off the Firth of Forth by with the loss of nine crew. (en)
- World War I: The sailing vessel was sunk in the Mediterranean Sea south of Cape Carbonara, Sardinia by . (en)
- The naval trawler foundered in the North Sea with the loss of all thirteen crew. (en)
- World War I: The cargo ship was torpedoed and sunk in the North Sea east of Scarborough, Yorkshire by with the loss of eleven of her crew. (en)
- World War I: The cargo ship was sunk in the English Channel west north west of Cap d'Antifer, Seine-Inférieure by . (en)
- World War I: The sailing vessel was sunk in the Mediterranean Sea north of Linosa by . (en)
- World War I: The fishing vessel was scuttled in the North Sea south east of Buchan Ness, Aberdeenshire by . Her crew survived, but her captain was taken as a prisoner of war. (en)
- World War I: The cargo liner sank after being torpedoed the previous day in the Atlantic Ocean southwest of Ireland off Fastnet Rock by . Seven crew were killed while abandoning ship. Survivors were rescued by . (en)
- World War I: The four-masted schooner was captured and sunk with explosives in the Mediterranean Sea off Cagliari, Sardinia, Italy by . Her crew was taken to Sardinia and released. (en)
- World War I: The cargo ship struck a mine and sank in the Indian Ocean west of Colombo, Ceylon with the loss of three of her crew. (en)
- World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea east of Djidjelli, Algeria by with the loss of 21 crew. (en)
- World War I: The cargo ship was sunk in the Mediterranean Sea off Alicante by . Her crew survived. (en)
- World War I: The naval trawler was torpedoed and sunk in the Mediterranean Sea east by south of Malta by with the loss of seven crew. (en)
- World War I: The schooner was scuttled in the Atlantic Ocean south south east of the Isles of Scilly by . Her crew survived. (en)
- World War I: The fishing smack was shelled and sunk in the Atlantic Ocean north west by west of the Eddystone Lighthouse by . Her crew survived. (en)
- World War I: The cargo ship was sunk in the Mediterranean Sea off Alicante, Spain by . Her crew survived. (en)
- The ferry went ashore on Wilburs Point at Sconticut Neck near New Bedford, Massachusetts. Refloated, repaired and returned to service. (en)
- World War I: The collier was shelled and sunk in the Atlantic Ocean west of the Fastnet Rock by with the loss of five crew. (en)
- The four-masted barque was sunk by German submarine at . (en)
- World War I: The schooner was shelled and sunk in the Mediterranean Sea south of San Pietro Island by . (en)
- World War I: The naval yacht struck a mine placed by and sank in the North Sea off Portmahomack, Ross-shire with the loss of 23 of her crew. (en)
- World War I: A naval trawler was reportedly sunk by a mine while attempting to notify that she was entering a mine field from Le Havre, France. (en)
- World War I: The cargo ship was torpedoed and sunk in the Bay of Biscay off the Île de Ré, Charente-Maritime by with the loss of ten of her crew. (en)
- World War I: The cargo ship struck a mine placed by and sank in the Bay of Biscay north east of Kerdonis, Belle Île, Morbihan, France with the loss of a crew member. (en)
- World War I: The Type U 81 submarine was attacked and sunk in the Atlantic Ocean south west of Ireland by the Q-ship . Thirty-five of her 37 crew were killed. (en)
- World War I: The Q-ship was torpedoed and damaged in the Atlantic Ocean south of Ireland by . She was subsequently taken in tow and beached at Berehaven, County Cork. Later repaired and returned to service. (en)
- World War I: The cargo ship struck a mine placed by and sank in the Irish Sea south of Skokholm, Pembrokeshire with the loss of a crew member. (en)
- World War I: The cargo ship was shelled and sunk in the Mediterranean Sea south east of Pantelleria by with the loss of four crew. (en)
- World War I: The cargo ship was sunk in the Mediterranean Sea off Benghazi, Libya by . Her crew survived. (en)
- World War I: The cargo ship was sunk in the North Sea off the Noordhinder Lightship by . Her crew survived. (en)
- World War I: The cargo ship was torpedoed and sunk in the English Channel south east of Start Point, Devon by . Her fifteen crew survived. (en)
- World War I: The coaster was sunk in the English Channel north of Cap d'Antifer, Seine-Inférieure, France by . Her crew survived. (en)
- World War I: The cargo ship was shelled and sunk in the Bay of Biscay west of Belle Île, Morbihan, France by . Her crew survived. (en)
- World War I: the coaster was scuttled in the Bay of Biscay south west of the Glénan Islands, Finistère, France by . (en)
- World War I: The cargo ship was sunk in the English Channel south south west of Start Point, Devon, United Kingdom by . Her crew survived. (en)
- World War I: The trawler was shelled and sunk in the North Sea north east of the mouth of the River Tyne by . Her crew survived. (en)
- World War I: The cargo ship was sunk in the Atlantic Ocean north west of Tearaght Island, County Kerry, United Kingdom by . Her crew survived. (en)
- World War I: The fishing vessel was shelled and sunk in the North Sea east by south of St Abb's Head, Berwickshire by . Her crew survived. (en)
- World War I: The Type UC II submarine was depth charged, shelled and sunk in the North Sea off Flamborough Head by with the loss of seven of her crew. (en)
- World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea east of Cape Bon, Tunisia by with the loss of two crew. (en)
- World War I: The coaster struck a mine placed by and sank in the English Channel off Folkestone, Kent with the loss of two of her crew. (en)
- The schooner barge foundered off Delaware in a gale, a total loss. The crew were rescued by before sinking. (en)
- World War I: The barque was torpedoed and sunk in the Atlantic Ocean south east of Mine Head, County Cork by . Her crew survived. (en)
- World War I: The sailing vessel was scuttled in the English Channel off Cap Barfleur, Seine-Inférieure, France by . (en)
- World War I: The troopship was sunk in the Mediterranean Sea south east of Malta by with the loss of 754 lives. (en)
- World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea east of Benghazi, Libya by with the loss of 49 of her crew. One survivor was taken as a prisoner of war. (en)
- World War I: The barque was shelled and sunk in the English Channel west south west of Guernsey, Channel Islands by . Her crew survived. (en)
- World War I: The cargo ship was shelled and damaged in the Bay of Biscay south of the Île d'Yeu, Vendée, France by . She was beached at Saint-Gilles-sur-Vie. Later refloated and returned to service. (en)
- World War I: The cargo ship was captured and sunk with explosives in the Atlantic Ocean south of the Bishop Rock, Isles of Scilly, United Kingdom by . Her crew was rescued by trawler . (en)
- World War I: The boat was sunk in the English Channel west of Étaples by . (en)
- World War I: The sailing vessel was sunk in the Mediterranean Sea north west of Palermo, Sicily by . (en)
- World War I: The trawler struck a mine placed by and sank in the Atlantic Ocean off the Butt of Lewis, Outer Hebrides with the loss of ten crew. (en)
- The cargo ship collided with another vessel and sank in the Irish Sea. Her crew survived. (en)
- World War I: The cargo ship was sunk in the Atlantic Ocean north west of the Bishop Rock, Isles of Scilly, United Kingdom by . (en)
- World War I: The Type UC II submarine was sunk by a mine she was laying off the Roker Pier Lighthouse, County Durham, United Kingdom with the loss of all nineteen of her 22 crew. (en)
- World War I: The naval trawler struck a mine placed by and was damaged in the English Channel off Folkestone . One man died. She was beached by was later refloated, repaired and returned to service. (en)
- World War I: The full-rigged ship was scuttled in the English Channel south east of The Lizard, Cornwall by . Her crew survived. (en)
- World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean west by north of the Fastnet Rock by with the loss of five crew. Three survivors were taken as prisoners of war. (en)
- World War I: The fishing smack was sunk in the Irish Sea off the Smalls Lighthouse by with the loss of four of her crew. (en)
- The motor vessel grounded on rocks in fog in an unknown location. (en)
- World War I: The full-rigged sailing ship was captured and sunk by off Brazil. (en)
- World War I: The sailing vessel was sunk in the Mediterranean Sea north west of Alexandria, Egypt by . Her crew survived. (en)
- World War I: The barque was scuttled in the Atlantic Ocean south west of the Wolf Rock, Cornwall, United Kingdom by . Her crew survived, one of them was taken aboard SM UC-17 at his request. (en)
- World War I: The schooner was scuttled in the Atlantic Ocean north of Ouessant by . (en)
- World War I: The Type UC II submarine was sunk in the English Channel west of Jersey by the Q ship with the loss of all 28 crew. (en)
- World War I: The fishing vessel was sunk in the North Sea off the coast of Norfolk, United Kingdom by . (en)
- World War I: The schooner was scuttled in the Mediterranean Sea off Mallorca, Spain by . Her six crew were rescued by . (en)
- World War I: The cargo ship was captured, torpedoed and sunk in the Atlantic Ocean west of the Bishop's Rock by . (en)
- World War I: The cargo ship was sunk in the Atlantic Ocean north of Cap Villano, Spain by . Her crew survived. (en)
- World War I: The coaster was scuttled in the Irish Sea south west of Bardsey Island, Pembrokeshire by . Her crew survived. (en)
- World War I: The trawler was shelled and sunk in the North Sea off the Longstone Lighthouse, Farne Islands by . Her crew survived. (en)
- World War I: The coaster was scuttled in the Irish Sea off Bardsey Island, Pembrokeshire by with the loss of a crew member. (en)
- World War I: The sailing vessel was sunk in the Atlantic Ocean west south west of the Fastnet Rock by . Her crew survived. (en)
- World War I: The fishing vessel was scuttled in the Atlantic Ocean north north east of St. Ives Head, Cornwall by . Her crew survived. (en)
- World War I: The cargo ship was sunk in the North Sea by with the loss of two of her crew. (en)
- World War I: The fishing vessel was shelled and sunk in the Bay of Biscay off Les Sables-d'Olonne by . Her five crew survived. (en)
- World War I: The cargo ship was sunk in the North Sea south east of the Isle of May, Fife, United Kingdom by . Her crew survived. (en)
- World War I: The trawler was shelled and sunk in the North Sea off Girdle Ness, Aberdeenshire by . Her crew survived. (en)
- World War I: The full-rigged ship was sunk in the Bay of Biscay by . Her crew took to the lifeboats but were not recovered. (en)
- The schooner went ashore near Marquesas Keys off Key West, Florida. Refloated and returned to service. (en)
- World War I: The fishing smack was scuttled in the Irish Sea south west of the Smalls Lighthouse by . Her crew survived. (en)
- World War I: The fishing vessel was sunk in the English Channel north west of Fécamp, Seine-Inférieure by . (en)
- World War I: The cargo ship was sunk in the Atlantic Ocean north of the Stiff Lighthouse, Ouessant, Finistère, France by . (en)
- World War I: The cargo ship was sunk in the Atlantic Ocean south west of the Fastnet Rock by . Her crew survived. (en)
- World War I: The cargo ship struck a mine and sank in the English Channel south of the Owers Lightship by with the loss of eight of her crew. (en)
- World War I: The sailing vessel was sunk in the English Channel south south west of Dungeness, Kent, United Kingdom by . Her crew survived. (en)
- World War I: The cargo ship was sunk in the Atlantic Ocean west of Ouessant by . (en)
- World War I: The pilot boat was sunk in the Bay of Biscay west south west of La Coubre Point, Charente-Maritime by . Her crew survived. (en)
- The barge ran aground near Hog Island, Massachusetts. (en)
- World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean north north east of Gurnard's Head, Cornwall by with the loss of two of her crew. (en)
- World War I: The cargo ship was captured, torpedoed and sunk in the Atlantic Ocean north west of the Bishop's Rock by . (en)
- World War I: The lugger was scuttled in the Bay of Biscay off Les Sables-d'Olonne, Vendée by . (en)
- World War I: The fishing schooner was scuttled in the Atlantic Ocean off Cabo de Santa María, Portugal by . Her crew survived. (en)
- The barge sprung a leak and sank south south west of the Brenton Reef Lightship in Block Island Sound, a total loss. Both crewmen died. (en)
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