List of shipwrecks in July 1917

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

1 July
For the loss of the Norwegian barque Asalia on this date, see the entry for 30 June 1917
 * Advance ( undefined): World War I: The fishing smack was shelled and sunk in the North Sea by SMU UC-63 . Her crew survived.
 * SS Amstelland (1900) (🇳🇱 Netherlands): World War I: The cargo ship was sunk in the Atlantic Ocean 35 nmi south of Galley Head, County Cork, United Kingdom by SMU UC-30.
 * Angela Madre ( undefined): World War I: The sailing vessel was sunk in the Mediterranean Sea south of Sardinia by SMU UC-67.
 *  Ariel ( undefined): World War I: The schooner was scuttled in the North Sea 15 nmi east north east of Rattray Head, Aberdeenshire (57.75°N, -1.2°W) by SMU UC-33 . Her crew survived.
 * SS Bachi (1893) (🇪🇸 Spain): World War I: The cargo ship was sunk in the Bay of Biscay west of Sables d'Olonne, Vendée, France by SMU U-84.
 * Corrado ( undefined): World War I: The sailing vessel was sunk in the Mediterranean Sea between Sardinia and Sicily by SMU U-38.
 * SS Demerara (1912) ( undefined): World War I: The passenger ship was torpedoed and damaged in the Bay of Biscay 6 nmi west of Sables d'Olonne by SMU U-84 with the loss of a crew member. She was beached on the Île de Ré but was later refloated.
 * SS Don Emilio (1906) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 10 nmi north west by west of the Esha Ness Lighthouse, Shetland Islands (60.55°N, -2.13333°W) by SMU U-80 ( with the loss of a crew member.
 * Eclipse ( undefined): World War I: The trawler was shelled and sunk in the Atlantic Ocean 100 nmi north by west of Brough of Birsay, Orkney Islands by SMU U-45 . Her crew survived.
 * Gleam ( undefined): World War I: The fishing smack was shelled and sunk in the North Sea by SMU UC-63 . Her crew survived.
 * Marie (🇫🇷 France): World War I: The sailing vessel was sunk in the Mediterranean Sea west of Sardinia by SMU U-63 (Germany).
 * SS Militades Embiricos (1897) (🇬🇷 Greece): World War I: The cargo ship was sunk in the Mediterranean Sea north of Bizerta, Algeria (37.96667°N, 9.66667°W) by SMU UC-67 . Her crew survived.
 * Radiance ( undefined): World War I: The fishing smack was scuttled in the North Sea by SMU UC-63 . Her crew survived.
 * Volto Santo G. ( undefined): World War I: The sailing vessel was sunk in the Mediterranean Sea between Sardinia and Sicily (38.41667°N, 10.85°W) by SMU U-38.

2 July

 *  Argentario ( undefined): World War I: The barque was scuttled in the Mediterranean Sea south of Sardinia (38.13333°N, 9.85°W) by SMU U-63 (Germany).
 * Bessie (🇸🇪 Sweden): World War I: The trawler was shelled and sunk in the North Sea (61.91667°N, 1.16667°W) by SMU U-86 . Her crew survived.
 * General Buller ( undefined): World War I: The drifter was shelled and sunk in the North Sea off Sumburgh Head, Shetland Islands by SMU UC-33 . Her crew survived.
 * Hamnavoe ( undefined): World War I: The drifter was shelled and sunk in the North Sea off Sumburgh Head by SMU UC-33 . Her crew survived.
 * May Flower (🇸🇪 Sweden): World War I: The fishing vessel was shelled and sunk in the North Sea north of the Shetland Islands, United Kingdom (61.66667°N, 1.33333°W) by SMU U-57 . Her crew survived.
 * SS Shinsan Maru (1898) (🇯🇵 Japan): World War I: The cargo ship was sunk in the Mediterranean Sea by SMU UB-47.
 * SS Thirlby (1898) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 122 nmi north west by west of the Fastnet Rock (51.65°N, -12.86667°W) by SMU UC-30 with the loss of two of her crew.

3 July

 *  Cimbria (🇩🇰 Denmark): World War I: The three-masted schooner was sunk in the Atlantic Ocean west of the Shetland Islands, United Kingdom (60.15°N, -5.83333°W) by SMU U-49 . Her crew survived.
 * SS City of Cambridge (1882) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 10 nmi north west of Jijelli, Algeria by SMU UC-67 . Her crew survived.
 * HMT Drake II : The naval trawler was wrecked in the Kenmare River, County Cork.
 * SS Henrik (1911) (🇳🇴 Norway): World War I: The cargo ship was torpedoed and sunk in the Bay of Biscay 60 nmi west south west of Penmarc'h, Finistère, France (47.41667°N, -5.36667°W) by SMU UC-72 . Her crew survived.
 * SS Iceland (1903) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 10 nmi south west of Galley Head, County Cork by SMU U-88 with the loss of two of her crew.
 * Immacolatina ( undefined): World War I: The sailing vessel was sunk in the Mediterranean Sea west of Sicily by SMU U-63 (Germany).
 *  Marthe Roux (🇫🇷 France): World War I: The barque was scuttled in the Mediterranean Sea 25 nmi off Cape Ivi, Algeria (36.5°N, 0.21667°W) by SMU U-34 (Germany).
 * Mary Boyes (🇩🇰 Denmark): World War I: The fishing vessel was sunk in the Atlantic Ocean west of the Shetland Islands (60.15°N, -5.83333°W) by SMU U-49 . Her crew survived.
 * SS Matador (1904) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 115 nmi west by north of the Fastnet Rock (51.26667°N, -12.41667°W) by SMU UC-30 with the loss of two of her crew.
 * SS Mongara (1914) ( undefined): World War I: The passenger ship was torpedoed and sunk in the Mediterranean Sea 1.5 nmi off Messina, Sicily, Italy (38.16667°N, 15.6°W) by SMU U-28 (Austria-Hungary) . All on board survived.
 * SS Orleans (1905) (🇺🇸 United States): World War I: The cargo ship was sunk in the Atlantic Ocean 165 nmi west south west of Belle Île, Morbihan, France (47.2°N, -7.66667°W) by SMU UC-71 with the loss of four of her crew.
 * Proefneming I (🇳🇱 Netherlands): World War I: The fishing vessel was sunk in the Atlantic Ocean west of the Shetland Islands (60.15°N, -5.83333°W) by SMU U-49 . Her crew survived.
 * Thor (🇳🇱 Netherlands): World War I: The fishing vessel was shelled and sunk in the Atlantic Ocean west of the Shetland Islands (60.15°N, -5.83333°W by SMU U-49 . Her crew survived.

4 July

 * HMS Aster (1915) : World War I: The struck a mine and sank in the Mediterranean Sea off Malta with the loss of ten of her 77 crew.
 * SS Bestevaer (1879) (🇳🇱 Netherlands): World War I: The cargo ship was sunk in the North Sea 6 nmi off Scheveningen, South Holland by SMU UC-21 . Her crew survived.
 * Chrysolite ( undefined): World War I: The fishing smack struck a mine and sank in the North Sea 4 nmi north of the Haisbro Lightship ( undefined) with the loss of five of her crew.
 * SS Fratelli Bianchi (1898) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 4 nmi off Cap de l'Aiguille (36.08333°N, -1.15°W) by SMU U-34 (Germany).
 * SS Goathland (1906) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Bay of Biscay 6.32 nmi off Belle Île, Morbihan, France (47.18333°N, -3.13333°W by SMU U-84 with the loss of 21 of her crew. One of the survivors was rescued by SM U-84.
 * SS Hurstside (1907) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 108 nmi north north east of Cape Wrath, Sutherland (60.41667°N, -4.63333°W) by SMU UC-54 . Her crew survived.
 *  Kodan (🇩🇰 Denmark): World War I: The schooner was scuttled in the Atlantic Ocean north west of Ireland by SMU U-93 . Her crew survived.
 * Loch Katrine ( undefined): World War I: The trawler was shelled and sunk in the North Sea 85 nmi east south east of Sandoy, Faroe Islands by SMU U-87 . Her crew survived.
 * HMS Mona : The Q-ship was lost in the Mediterranean Sea on this date.
 * SS Snetoppen (1889) (🇳🇴 Norway): World War I: The cargo ship was sunk in the Atlantic Ocean 100 nmi west south west of Ouessant, Finistère, France (47.5°N, -7.08333°W) by SMU UC-71 . Her crew survived.
 * SS Ull (1880) (🇳🇴 Norway): World War I: The coaster was sunk in the English Channel 9 nmi west north west of Portland Bill, Dorset, United Kingdom by SMU UC-61 . Her crew survived.

5 July

 * SS Bjerkø (1912) (🇳🇴 Norway): World War I: The cargo ship was torpedoed and sunk in the English Channel 7 nmi north west of the Triagoz Lighthouse, Finistère, France (48.83333°N, -3.85°W) by SMU UB-18 with the loss of sixteen crew.
 * SS Ciboure (1911) (🇫🇷 France): World War I: The cargo ship was sunk in the Mediterranean Sea 22 nmi south west of Gozo, Malta (35.91667°N, 13.68333°W) by SMU U-65 (Germany).
 * SS Cuyahoga ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 130 nmi west north west of Tory Island, County Donegal (55.2°N, -12.16667°W) by SMU U-57 . Her crew survived.
 * SS Havbris (1906) (🇳🇴 Norway): World War I: The coaster was torpedoed and sunk in the English Channel 3 nmi south west of Prawle Point, Devon, United Kingdom by SMU UB-32 . Her crew survived.
 * SS Marionga Goulandris (1905) (🇬🇷 Greece): World War I: The cargo ship was sunk in the Mediterranean Sea off Cape Matapan (35.63333°N, 22.6°W) by SMU U-14 (Austria-Hungary).
 *  Ocean Swell ( undefined): World War I: The barquentine was shelled and sunk in the English Channel 15 nmi south east of Start Point, Devon by SMU UB-31 . Her crew survived.
 * SMU UC-7 : World War I: The Type UC I submarine was last reported in the North Sea on this date. Believed to have subsequently struck a mine and sank in the North Sea north of Zeebrugge, West Flanders, Belgium with the loss of all eighteen crew.

6 July

 * SS Cumberland ( undefined): World War I: The cargo ship struck a mine and sank in the Pacific Ocean 16 nmi south west of Gabo Island, Victoria, Australia.
 * SS Flora (1891) (🇳🇴 Norway): World War I: The passenger ship was sunk in the North Sea 12 nmi north east of Lamba Ness, Shetland Islands, United Kingdom by SMU U-52 .All on board survived.
 * Handel en Visscherij (🇳🇱 Netherlands): World War I: The fishing vessel was shelled and sunk in the North Sea (56.83333°N, 5.33333°W) by SMU UC-33 . Her crew survived.
 * SS Indutiomare (🇧🇪 Belgium): World War I: The cargo ship was torpedoed and sunk in the English Channel (50.56667°N, -1.4°W) by SMU UC-61 . Her crew survived.
 * HMS Itchen (1903) : World War I: The E-class destroyer was torpedoed and sunk in the North Sea 70 nmi north north east of Peterhead, Aberdeenshire (58.58333°N, -0.75°W) by SMU UC-44 with the loss of eight of her 70 crew.
 * SS Løvstakken (1894) (🇳🇴 Norway): World War I: The cargo ship was sunk in the Atlantic Ocean 40 nmi north west of Ouessant, Finistère, France (48°N, -5.71667°W) by SMU UC-71 . Her crew survived.
 *  Motor (🇩🇰 Denmark): World War I: The auxiliary schooner was shelled and sunk in the North Sea off Utsira, Rogaland, Norway (59.36667°N, 2.75°W) by SMU U-58 . Her crew survived.
 * Piet Hein (🇳🇱 Netherlands): World War I: The fishing vessel was shelled and sunk in the North Sea (56.83333°N, 5.33333°W) by SMU UC-33 . Her crew survived.
 * Roma ( undefined): World War I: The sailing vessel was sunk in the Strait of Sicily by SMU U-65 (Germany).
 *  Skjald (🇳🇴 Norway): World War I: The barque was scuttled in the North Sea (57.05°N, 4.76667°W) by SMU UC-33 . Her crew survived.
 * SS Victoria 2 (1896) (🇳🇴 Norway): World War I: The cargo ship was scuttled in the Atlantic Ocean 35 nmi north of Ouessant by SMU UC-71 . Her crew survived.

7 July

 * SS Bellucia (1909) ( undefined): World War I: The cargo ship was torpedoed and damaged in the English Channel 2 nmi south south east of The Lizard, Cornwall (49.96667°N, -5.18333°W) by SMU UB-31 with the loss of four of her crew. She was taken in tow but consequently sank.
 * SS Condesa (1916) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 105 nmi west of the Bishop Rock, Isles of Scilly (49.38333°N, -9°W) by SMU U-84 . Her crew survived.
 * Coral Leaf ( undefined): World War I: The sailing vessel was shelled and sunk in the Atlantic Ocean 18 nmi north west by north of Tearaght Island, County Donegal by a Kaiserliche Marine submarine.
 * HMT Kelvin : World War I: The naval trawler struck a mine and sank in the North Sea east of Aldeburgh, Suffolk (52.07361°N, 1.78056°W) with the loss of five of her crew.
 * La Resolu (🇫🇷 France): World War I: The sailing vessel was sunk in the Mediterranean Sea by SMU U-38.
 * SS Massapequa (1893) (🇺🇸 United States): World War I: The cargo ship was shelled and sunk in the Atlantic Ocean 200 nmi west of Belle Île, Morbihan, France (46.66667°N, -9°W) by SMU UC-72 . Her crew survived.
 *  Milano ( undefined): World War I: The schooner was shelled and sunk in the Mediterranean Sea off Cape Sigli, Algeria (37.1°N, 4.83333°W) by SMU UC-67.
 * Mt 11 : World War I: The minesweeping boat struck a mine and sank in the Baltic Sea off Rauma, Finland.
 * Mt 14 : World War I: The minesweeping boat struck a mine and sank in the Baltic Sea off Rauma.
 *  Oxø (🇳🇴 Norway): World War I: The barque was sunk in the Atlantic Ocean 90 nmi west of the Isles of Scilly (49.53333°N, -8.28333°W) by SMU U-84 . Her crew survived.
 * USS Saxis (SP-615) : The patrol vessel was wrecked at West Point, Virginia.
 * SS Shigizan Maru (1892) (🇯🇵 Japan): World War I: The cargo ship struck a mine and sank in the Mediterranean Sea off Port-la-Nouvelle, Aude, France. Her crew survived.
 * HMT Southesk : World War I: The naval trawler struck a mine and sank in Auskerry Sound (59.05°N, -2.56667°W) with the loss of four of her crew.
 * SS Southina (1899) ( undefined): World War I: The collier was torpedoed and sunk in the Mediterranean Sea 6 nmi north north west of Cape Sigli (36.86667°N, 4.93333°W) by SMU UC-67 with the loss of a crew member.
 * SS Tarquah (1902) ( undefined): World War I: The passenger ship was torpedoed and sunk in the Atlantic Ocean 10 nmi south west of the Bull Rock (51.48333°N, -10.41667°W) by SMU U-57 . Her crew survived.
 * SMU U-99 : World War I: The Type U 57 submarine was torpedoed and sunk in the North Sea (58°N, 3.66667°W) by HMS J2 ( with the loss of all 40 crew.
 * SS Wilberforce (1899) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 25 nmi south of the Cabo de Gata, Spain (36.38333°N, -2.36667°W) by SMU U-34 (Germany) with the loss of a crew member. Two crew were taken as prisoners of war.

8 July

 *  Asheim (🇳🇴 Norway): World War I: The four-masted barque was scuttled in the Atlantic Ocean 120 nmi north west of Inishtrahull Island, County Donegal, United Kingdom (57.55°N, -7.91667°W) by SMU U-53 with the loss of a crew member.
 *  Atlantic (🇳🇴 Norway): World War I: The barque was sunk in the Atantic Ocean 20 nmi south of St. Kilda, United Kingdom by SMU U-53 . Her crew survived.
 *  Cambronne (🇫🇷 France): World War I: The barque was scuttled in the Atlantic Ocean 200 nmi off the Île de Sein, Finistère (47.56667°N, -7.5°W) by SMU UC-72.
 *  Fiorella (🇳🇴 Norway): World War I: The barque was scuttled in the Norwegian Sea 40 nmi east of the Faroe Islands by SMU U-58 . Her crew survived.
 *  L'Immortale Leone ( undefined): World War I: the brigantine was shelled and sunk in the Strait of Sicily (36.33333°N, 11.58333°W) by SMU U-65 (Germany).
 *  Mary W. Bowen (🇺🇸 United States): World War I: The five-masted schooner was scuttled in the Atlantic Ocean west of Belle Île (47.33333°N, -8.16667°W) by SMU UC-72 . Her crew survived.
 * SS M. I. Mandal (1913) (🇩🇰 Denmark): World War I: The cargo ship was scuttled in the Atlantic Ocean 110 nmi west of Ouessant, Finistère by SMU UC-72 . Her crew survived.
 * SS Obuasi (1910) ( undefined): World War I: The passenger ship was torpedoed and sunk in the Atlantic Ocean 290 nmi north west by west of the Fastnet Rock by SMU U-49  with the loss of two crew. Her captain was taken as a prisoner of war.
 * SS Pegu (1913) ( undefined): World War I: The cargo liner was torpedoed and sunk in the Atlantic Ocean 7 nmi) south eath of Galley Head, County Cork (51.46667°N, -8.65°W) by SMU U-57 with the loss of a crew member.
 * SS Ruelle (1901) (🇫🇷 France): World War I: The cargo ship was sunk in the Atlantic Ocean 200 nmi north west of Madeira, Portugal (approximately 38°N, -18°W) by SMU U-155.
 *  Spekulation (🇸🇪 Sweden): World War I: The barque was shelled and sunk in the North Sea 50 nmi south east of Hartlepool, County Durham, United Kingdom by SMU UC-55 . Her crew survived.
 * SS Valetta ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 118 nmi north west by west of the Fastnet Rock (51.81667°N, -12.36667°W) by SMU U-87 . Her crew survived.
 * SS Vendee (1911) ( undefined): World War I: The cargo ship struck a mine and sank in the Bay of Biscay off the mouth of the Gironde (45.75°N, -1.33333°W with the loss of three of her crew.

9 July

 *  Ceres (🇫🇷 France): World War I: The brigantine was sunk in the Atlantic Ocean 130 nmi west of Penmarc'h, Finistère (47°N, -10.6°W) by SMU UC-72.
 * SS Iparraguirre (1882) (🇪🇸 Spain): World War I: The cargo ship was sunk in the Atlantic Ocean 40 nmi north west of the Butt of Lewis, United Kingdom (59.13333°N, -6.16667°W) by SMU U-66 with the loss of a crew member.
 * SS Prince Abbas (1892) ( undefined): World War I: The cargo ship was torpedoed and sunk in the North Sea 29 nmi east of Fair Isle by SMU U-52 with the loss of two crew.
 * HMS Vanguard (1909) : The exploded and sank at Scapa Flow, Orkney Isles with the loss of 804 of her 806 crew.

10 July

 * Cedric ( undefined): World War I: The trawler was scuttled in the Atlantic Ocean 55 nmi south by west of Suðuroy, Faroe Islands by SMU U-53 . Her crew survived.
 *  City of Washington (🇺🇸 United States): The coal barge came ashore at Key Largo, Florida and was wrecked.
 * SS Flamma (1917) ( undefined): World War I: The cargo ship struck a mine and was damaged in the North Sea off Hartlepool, County Durham. She was beached but was later refloated.
 * SS Garmoyle (1896) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 14 nmi south east of Mine Head, County Cork (51.81667°N, -6.86667°W) by SMU U-57 with the loss of twenty crew.
 *  Hildegard (🇺🇸 United States): World War I: The barquentine was scuttled in the English Channel 10 nmi south east of Start Point, Devon, United Kingdom by SMU UB-31 . Her crew survived.
 * OTTOMAN DESTROYER Jadhigar-i-Millet : World War I: The was bombed and sunk in the Bosphorus (39.93333°N, 29.175°W) by a Royal Naval Air Service handley Page bomber. She was later refloated and scrapped.
 * Jupiter (🇫🇷 France): World War I: The trawler struck a mine and sank in the English Channel with the loss of eleven of her crew.
 * SS Kansan (1903) (🇺🇸 United States): World War I: The cargo ship struck a mine and sank in the Bay of Biscay 2 nmi east of Kerdonis Point, Belle Île, Morbihan, France (47.33333°N, -3.05°W) with the loss of four of her crew.
 * SS King David (1906) ( undefined): World War I: The cargo ship was shelled and sunk in the Atlantic Ocean 360 nmi north west of the Fastnet Rock by SMU U-49 with the loss of two crew.
 * Mabel ( undefined): World War I: The trawler was scuttled in the Atlantic Ocean off Suðuroy by SMU U-53 . Her crew survived.
 * Pacific ( undefined): World War I: The trawler was scuttled in the Atlantic Ocean off Suðuroy by SMU U-53 . Her crew survived.
 * Peridot ( undefined): World War I: The trawler was scuttled in the Atlantic Ocean off Suðuroy by SMU U-53 . Her crew survived.
 * Pretoria ( undefined): World War I: The trawler was shelled and sunk in the Atlantic Ocean 130 nmi north by west of Hoy Head, Shetland Islands by SMU U-53 . Her crew survived.
 * Romantic ( undefined): World War I: The trawler was scuttled in the Atlantic Ocean off Suðuroy by SMU U-53 . Her crew survived.
 * Sea King ( undefined): World War I: The trawler was scuttled in the Atlantic Ocean 60 nmi south by east of Suðuroy by SMU U-53 . Her crew survived.
 * SS Seang Choon (1891) ( undefined): World War I: The passenger ship was torpedoed and sunk in the Atlantic Ocean 10 nmi south west of the Fastnet Rock by SMU U-87 with the loss of nineteen lives.
 * Stoic ( undefined): World War I: The trawler was scuttled in the Atlantic Ocean off Suðuroy by SMU U-53 . Her crew survived.
 * HMT Vale of Leven : The naval trawler was lost on this date.
 * OTTOMAN DESTROYER Yâdigâr-ı-Millet : World War I: The was bombed and sunk at İstinye, Turkey by Royal Naval Air Service aircraft with the loss of 26 of her crew.

11 July

 * SS Anglo-Patagonian (1910) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Bay of Biscay 20 nmi west south west of Sables d'Olonne, Vendée, France (46.43333°N, -2.16667°W) by SMU UC-72 with the loss of four of her crew.
 * SS Brunhilda (1901) ( undefined): World War I: The cargo ship was torpedoed and sunk in the English Channel 7 nmi south east of Start Point, Devon by SMU UB-31 . Her crew survived.
 * SS Kioto (1910) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 20 nmi south west of the Fastnet Rock (51.11667°N, -9.85°W) by SMU U-87 . Her crew survived.
 * SS Siracusa (1906) ( undefined): World War I: The cargo ship struck a mine and sank in the Mediterranean Sea.
 * SMU U-69 : The Type U 66 submarine reported that she was off the coast of Norway. The British claimed that she was depth charged and sank on 12 July by HMS Patriot (1916) ( but post-war evaluation casts doubt that U-69 was the victim. Lost with all 40 crew.
 * SS Vanda (1882) (🇸🇪 Sweden): World War I: The cargo ship was sunk in the North Sea (60.25°N, 1.33333°W) by SMU U-52.
 * SS Vordingborg (1908) (🇩🇰 Denmark): World War I: The cargo ship was scuttled in the English Channel 25 nmi north east of Ouessant, Finistère (48.86667°N, -5.26667°W) by SMU UC-77 . Her crew survived.

12 July

 * SS Balzac (1913) (🇳🇴 Norway): World War I: The cargo ship was torpedoed and sunk in the North Sea off Lerwick, Shetland Islands, United Kingdom (58.83333°N, -0.76667°W) by SMU UC-55 . Her crew survived.
 * SS Calliope (1900) ( undefined): World War I: The collier was sunk in the Atlantic Ocean 150 nmi north of Madeira, Portugal by SMU U-155 with the loss of all 27 crew.
 * SS Castleton (1891) ( undefined): World War I: The cargo ship was shelled and sunk in the Atlantic Ocean 60 nmi south south west of the Bishop Rock, Isles of Scilly by SMU U-87 . Her crew survived.
 * SS Claire (1871) (🇧🇪 Belgium): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 250 nmi north east of Bône, Algeria(40.01667°N, 6.08333°W) by SMU U-38 with the loss of 26 crew.
 *  Francesco ( undefined): World War I: The brigantine was scuttled in the Mediterranean Sea 10 nmi west of Marsala, Sicily (37.51667°N, 12.3°W) by SMU UC-67.
 * SS Fredrika (1890) (🇸🇪 Sweden): World War I: The cargo ship was torpedoed and damaged in the North Sea 50 nmi off the Orkney Islands, United Kingdom (59.13333°N, 0.9°W) by SMU U-52 . She was subsequently taken in tow but foundered 9 nmi east of Auskerry.
 * HMT George Milburn : World War I: The naval trawler struck a mine and sank in the Irish Sea 1.5 nmi south of Dunmore Point, County Waterford with the loss of eleven of her crew.
 * SS Grace (1912) (🇺🇸 United States): World War I: The cargo ship was sunk in the Aegean Sea 5 nmi north of Cape Phessos, Andros, Greece (38.18333°N, 24.68333°W) by SMU UC-38 with the loss of three of her crew.
 *  Lai (🇳🇴 Norway): World War I: The auxiliary schooner was sunk in the North Sea 40 nmi west of Egersund, Rogaland by SMU UC-55 . Her crew survived.
 * Leonardo G. ( undefined): World War I: The vessel was sunk in the Mediterranean Sea 10 nmi west of Marsala by SMU UC-67.
 *  Maija ( undefined): World War I: The schooner was sunk in the Atlantic Ocean off the coast of Portugal by SMU UC-54.
 * SS Muirfield (1907) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 350 nmi north west of the Fastnet Rock by SMU U-49 with the loss of two crew. Two survivors were taken as prisoners of war.
 *  Ondine (🇫🇷 France): World War I: The schooner was scuttled in the Mediterranean Sea 5 nmi north of Denia, Spain by SMU U-34 (Germany) . All six crew survived.

13 July

 * Afram (🇩🇰 Denmark): World War I: The sailing vessel was sunk in the North Sea 90 to 100 nmi east of Girdle Ness, Aberdeenshire, United Kingdom by SMU UC-45.
 * SS Ascain (1913) (🇫🇷 France): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 11 nmi north of the Stiff Lighthouse, Ouessant, Finistère by SMU UC-77.
 * SS Charialos Tricoupis (1892) (🇬🇷 Greece): World War I: The cargo ship was sunk in the Atlantic Ocean off Bantry, County Cork, United Kingdom (52.41667°N, -12.9°W) by SMU U-58.
 * SS Ceres (1882) (🇩🇰 Denmark): World War I: The cargo ship was sunk in the Atlantic Ocean off Inistrahull Island, County Donegal, United Kingdom (56°N, -12°W) by SMU U-88 with the loss of two of her crew.
 * SS Gibel-Yedid (1894) ( undefined): World War I: The coaster was scuttled in the Atlantic Ocean 150 nmi west of Ouessant by SMU U-48 . Her crew survived.
 *  Loanda (🇵🇹 Portugal): World War I: The schooner was shelled and sunk in the Atlantic Ocean 50 nmi off Cape Roca by SMU UC-54.

14 July

 * Bonus (🇫🇮 Finland): World War I: The vessel was sunk in the Baltic Sea off Mäntyluoto by SMU UC-58.
 * SS Chalkydon (1894) (🇬🇷 Greece): World War I: The cargo ship was sunk in the Atlantic Ocean 600 nmi west of Gibraltar (34.16667°N, -17.41667°W) by SMU U-155 . Her crew survived.
 *  Emanuel (🇩🇰 Denmark): World War I: The schooner was sunk in the Atlantic Ocean west of the Orkney Islands, United Kingdom (59.58333°N, -6°W) by SMU U-96 . Her crew survived; they were rescued by HMS G12.
 * SS Exford (1914) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 180 nmi west by south of Ouessant, Finistère, France (46.8°N, -8.83333°W) by SMU U-48 with the loss of six crew.

15 July

 *  Atalante (🇫🇷 France): World War I: The barque was sunk in the Mediterranean Sea south east of the Balearic Islands, Spain by SMU U-38.
 *  Dinorwic ( undefined): World War I: The three-masted schooner was scuttled in the English Channel 10 nmi south by east of Hastings, East Sussex by SMU UB-40 . Her crew survived.
 *  Dudhope ( undefined): World War I: The full-rigged ship was scuttled in the Atlantic Ocean 200 nmi west of the Fastnet Rock by SMU U-49 . Her crew survived.
 *  Ebenezer ( undefined): World War I: The brig was scuttled in the English Channel 25 nmi north west of Dieppe, Seine-Maritime, France by SMU UB-40 . Her crew survived.
 * SS Mariston (1915) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 82 nmi west of the Fastnet Rock (50.86667°N, -11.63333°W) by SMU U-45 with the loss of 28 crew.
 * HMS Redbreast (: World War I: The fleet messenger was sunk in the Aegean Sea by SMU UC-38 with the loss of 44 lives. One of the survivors was taken as a prisoner of war.
 * SS Torcello (1912) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 160 nmi south west by west of the Bishop Rock, Isles of Scilly by SMU U-48 with the loss of a crew member.
 * SS Trelissick (1909) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 80 nmi south west by west of Ouessant, Finistère, France (47.46667°N, -6.46667°W) by SMU UC-72 . Her crew survived, but three of them were taken as prisoners of war.

16 July

 * HMT Asama : World War I: The trawler, operating as a Q-ship, was shelled and sunk in the Atlantic Ocean 190 nmi due west of Lundy Island, Devon by SMU U-48 with the loss of a crew member.
 *  Cyrus ( undefined): World War I: The three-masted schooner was torpedoed and sunk in the Atlantic Ocean west of the Hebrides, United Kingdom (57.88333°N, -10.58333°W) by SMU U-30 (Germany).
 * SS Firfield (1915) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Gulf of Patras 10 nmi north west of Cape Papas, Greece (37.7°N, 25.78333°W) by SMU UC-38 . Her crew survived.
 * SS Henry R. James (1909) ( undefined): World War I: The cargo ship was sunk in the Atlantic Ocean 10 nmi east by north of the Île de Batz, Finistère, France (48.81667°N, -3.76667°W) by SMU UC-48 with the loss of 24 of her crew.
 * SS Khephren (1905) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 178 nmi east of Malta (36.25°N, 18°W) by SMU U-32 (Germany) . Her crew survived.
 * SS Lamia L. (1893) ( undefined): World War I: The cargo ship was sunk in the Atlantic Ocean south west of Ireland by SMU U-49 and SMU U-58 (both ). Her crew survived.
 * SS Porto di Adalia (1899) ( undefined): World War I: The cargo ship was sunk in the Mediterranean Sea 150 nmi east of Malta (34.66667°N, 18.66667°W) by SMU U-32 (Germany).
 * SS Ribston (1894) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 85 nmi west of the Fastnet Rock (50.86667°N, -11.63333°W) by SMU U-45 with the loss of 25 crew.
 * SS Tamele (1910) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 65 nmi west by south of the Fastnet Rock by SMU U-87 with the loss of a crew member.
 * MV Timor (1910) (🇳🇱 Netherlands): World War I: The coaster was scuttled in the North Sea 18 nmi south of the Noord Hinder Lightship (🇳🇱 Netherlands) by SMU UC-64.
 * SS Valentia (1898) ( undefined): World War I: The collier was torpedoed and sunk in the Atlantic Ocean 70 nmi west by south of the Bishop Rock, Isles of Scilly by SMU UC-41 with the loss of three of her crew.
 * SS Vesta (1879) (🇩🇰 Denmark): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean north of Scotland by SMU U-88 with the loss of five of her crew.

17 July

 * HMS C34 : World War I: The C-class submarine was sunk off the Shetland Islands (59.85°N, -1.08333°W) by SMU U-52 with the loss of eighteen of her nineteen crew. The survivor was rescued by U-52.
 *  Coquimbo (🇫🇷 France): World War I: The full-rigged ship struck a mine and sank in the Bay of Biscay off La Rochelle, Loire-Atlantique with the loss of seven of her crew.
 * SS Haworth (1912) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 94 nmi west of the Fastnet Rock (50.78333°N, -11.91667°W) by SMU U-45 . Her crew survived.
 * HMS Newmarket (1907) : World War I: The auxiliary minesweeper) was torpedoed and sunk in the Aegean Sea south of Icaria, Greece (37.28333°N, 26.25°W) by SMU UC-38 with the loss of 44 of her crew. Three of the survivors were taken as prisoners of war.
 * SS Virent (1902) ( undefined): World War I: The cargo ship was torpedoed and damaged in the Mediterranean Sea (35.66667°N, 14.75°W) by SMU U-32 (Germany) . She was beached but was refloated on 19 July. Subsequently repaired and returned to service.

18 July

 * HMT Betsy Sim : The naval trawler was lost on this date.
 * SS Ellen (1907) (🇳🇴 Norway): World War I: The cargo ship was scuttled in the Atlantic Ocean (36.66667°N, -23.66667°W)) by SMU U-155 . Her crew survived.

19 July

 *  Artensis (🇳🇴 Norway): World War I: The full-rigged ship was scuttled in the Atlantic Ocean west of Ireland 54.53333°N, -11.11667°W) by SMU U-87 . Her crew survived.
 * SS Clan McLachlan (1900) ( undefined): The collier collided with Europa ( undefined) and sank in the Atlantic Ocean 60 nmi south west of Cape Spartel, Morocco with the loss of six of her crew.
 * SS Eloby (1913) ( undefined): World War I: The troopship was torpedoed and sunk in the Mediterranean Sea 75 nmi south east by east of Malta (35.18333°N, 15.63333°W) by SMU U-38 with the loss of over 156 lives.
 * SS Harrildsborg (1907) (🇩🇰 Denmark): World War I: The cargo ship was torpedoed and sunk in the North Sea 24 nmi west of Holmengrå, Hordaland, Norway (60.78333°N, 4.15°W) by SMU U-67 . Her crew survived and were rescued by HMS Arab (1901).
 * SS Varvara (1872) (🇬🇷 Greece): World War I: The cargo ship was shelled and sunk in the Mediterranean Sea off Cape Spartivento, Calabria by SMU U-32 (Germany).

20 July

 * SS Beatrice (1890) ( undefined): World War I: The coaster was torpedoed and sunk in the English Channel 10 nmi east by south of The Lizard, Cornwall (49.95°N, -4.95°W) by SMU UC-47 with the loss of eleven of her crew.
 * SS Bramham (1891) ( undefined): World War I: The cargo ship struck a mine and sank in the English Channel 10 nmi east by south of The Lizard (50.01667°N, -4.93333°W) with the loss of a crew member.
 * SS City of Florence (1914) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 188 nmi west by north of Ouessant, Finistère, France (47.75°N, -9.75°W) by SMU UC-17 . Her crew survived.
 * SS Fluent (1911) ( undefined): World War I: The cargo ship was torpedoed and sunk in the English Channel 15 nmi south west of Portland Bill, Dorset (50.43333°N, -1.86667°W) by SMU UC-65 . Her crew survived.
 * SS Hanseat (1895) (🇳🇴 Norway): World War I: The cargo ship was sunk in the Atlantic Ocean 105 nmi south east by south of Santa Maria Island, Azores, Portugal (36°N, -23.2°W) by SMU U-155 . Her crew survived.
 * SS Kageshima Maru (1898) (🇯🇵 Japan): World War I: The cargo ship was sunk in the Atlantic Ocean 90 nmi west of Ouessant (47.48333°N, -6.33333°W) by SMU UC-69.
 * SS L. H. Carl (1898) ( undefined): World War I: The cargo ship was torpedoed and sunk in the English Channel 14 nmi west of Portland Bill (50.43333°N, -2.8°W) by SMU UB-40 with the loss of two of her crew.
 * SS Nevisbrook (1913) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 90 nmi west of the Fastnet Rock by SMU U-45 . Her crew survived.
 * HMS Queen of the North : World War I: The auxiliary minesweeper struck a mine and sank in the North Sea north east of the Shipwash Lightship ( undefined) (52.05417°N, 1.8275°W) with the loss of 29 of her crew.
 * HMT Robert Smith : The naval trawler was lost in the Atlantic Ocean on this date.
 * SS Salsette (1908) ( undefined): World War I: The passenger ship was torpedoed and sunk in the English Channel 15 nmi south west of Portland Bill by SMU UB-40 with the loss of fifteen lives.

21 July

 * SS African Prince (1903) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 60 nmi north north west of Tory Island, County Donegal (56°N, -9.5°W) by SMU U-66 . Her crew survived.
 *  Augustus Welt (🇺🇸 United States): World War I: The four-masted schooner was sunk in the Atlantic Ocean 130 nmi south west of Ouessant, Finistère, France by SMU UC-17 . Her crew survived.
 * SS Coniston Water (1908) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 70 nmi north by west of the Butt of Lewis (59.48333°N, -7.6°W) by SMU U-87 . Her crew survived, but one of them was taken as a prisoner of war.
 * SS Dafila (1917) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 85 nmi west by south of the Fastnet Rock by SMU U-45 with the loss of two crew.
 *  Doris ( undefined): World War I: The cargo ship was scuttled in the Atlantic Ocean 90 nmi south west of Santa Maria Island, Azores, Portugal by SMU U-155.
 *  Harold ( undefined): World War I: The barque was torpedoed and sunk in the Atlantic Ocean 65 nmi north north west of Tory Island by SMU U-66 with the loss of thirteen crew.
 *  John Twohy (🇺🇸 United States): World War I: The four-masted schooner was sunk in the Atlantic Ocean 120 nmi south of the Azores by SMU U-155 . Her crew survived.
 * SS Paddington (1906) ( undefined): World War I: The cargo liner was torpedoed and sunk in the Atlantic Ocean 250 nmi west of the Fastnet Rock (49.78333°N, -15.66667°W) by SMU U-96 with the loss of 29 lives.
 * SS Ramilles (1892) ( undefined): World War I: The cargo ship was shelled and sunk in the Atlantic Ocean 120 nmi west north west of Tory Island (55.4°N, -11.13333°W) by SMU U-58 . Her crew survived, but her captain was taken as a prisoner of war.
 * HMT Robert Smith : World War I: The naval trawler was shelled and sunk in the Atlantic Ocean by SMU U-44 with the loss of all 25 crew. Her last known position was 59.23333°N, -9.66667°W.
 * SS Trelyon (1898) ( undefined): World War I: The cargo ship struck a mine in the North Sea 3 nmi north of Scarborough, Yorkshire (54.3°N, -0.33333°W). She was beached but was a total loss.
 *  Willena Gertrude ( undefined): World War I: The schooner was scuttled in the Atlantic Ocean 120 nmi south by east of Santa Maria Island, Azores (35.41667°N, -23.43333°W) by SMU U-155 . Her crew survived.

22 July

 * SS Breda (1915) (🇳🇱 Netherlands): World War I: The coaster was torpedoed and damaged in the North Sea 7 nmi west of the Noord Hinder Lightship (🇳🇱 Netherlands) by SMU UB-35 . She was then shelled and sunk 8 nmi south west of the Noord Hinder Lightship by SMU UB-18.
 * SS Cotovia (1911) ( undefined): World War I: The cargo ship struck a mine and sank in the North Sea 2 nmi south east by east of Auskerry, Orkney Islands (59.01667°N, -2.61667°W). Her crew survived.
 * SS Dafila ( undefined: World War I: The cargo ship was sunk by a U-boat. Twenty six survivors rescued by USS Jacob Jones (DD-61).
 * SS Glow (1900) ( undefined): World War I: The cargo ship was torpedoed and sunk in the North Sea off Robin Hood's Bay, Yorkshire (54.38333°N, -0.38333°W) by SMU UB-21 with the loss of a crew member.
 * Nereus (🇳🇱 Netherlands): World War I: The sailing vessel was scuttled in the North Sea 10 nmi south by east of the Noord Hinder Lightship (🇳🇱 Netherlands) by SMU UB-18.
 * HMS Otway (1909) : World War I: The armed merchant cruiser was torpedoed and sunk in the Atlantic Ocean north of the Butt of Lewis, Outer Hebrides (58.9°N, -6.46667°W) by SMU UC-49 with the loss of ten lives.
 * HMT Orphesia : The naval trawler struck a submerged wreck and sank in the Mediterranean Sea off Alexandria, Egypt.
 * SS Rota (1915) ( undefined): World War I: The cargo ship was torpedoed and sunk in the English Channel 7 nmi east by south of Berry Head, Devon by SMU UB-40 with the loss of five of her crew.

23 July

 * SS Ashleigh (1917) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 290 nmi south west of the Fastnet Rock by SMU U-54 . Her crew survived.
 * SS Frithjof (1902) (🇳🇴 Norway): World War I: The cargo ship was sunk in the Atlantic Ocean off Cape Prior, Spain (43.65°N, -2.16667°W) by SMU UC-69 . Her crew survived.
 * SS Huelva (1915) ( undefined): World War I: The collier was torpedoed and sunk in the Atlantic Ocean 270 nmi south west of the Fastnet Rock by SMU U-54 . Her crew survived.
 * HMML 474 : The motor launch was lost in the Mediterranean Sea on this date.
 * HMS Otway (1909) : World War I: The armed merchant cruiser was torpedoed and sunk in the Atlantic Ocean off the Hebrides by SMU UC-49 with the loss of ten of her crew.
 * SS Vanland (1893) (🇸🇪 Sweden): World War I: The cargo ship was damaged in the North Sea off Whitby, Yorkshire, United Kingdom by SMU UB-21 . She was beached but was a total loss.

24 July

 * SS Blake (1906) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 30 nmi north west of Cape Wrath, Sutherland by SMU UC-49 with the loss of five of her crew.
 * SS Brumaire (1901) ( undefined) World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 265 nmi west by north of Ouessant, Finistère, France (48.33333°N, -11.68333°W) by SMU U-46 with the loss of two crew.
 * HMS C34 : World War I: The C-class submarine was sunk by SMU U-52 in the Atlantic Ocean off Fair Isle with the loss of fifteen of her sixteen crew.
 * SS Mikelis (1885) (🇬🇷 Greece): The cargo ship sank in the Atlantic Ocean (54.33333°N, -5.1°W).
 * Montevideo 488 (🇺🇾 Uruguay): World War I: The floating crane was sunk in the North Sea 30 nmi off the Nieuwe Waterweg, Netherlands (51.83333°N, 3.05°W) by SMU UB-18.
 * ST Oostzee (🇳🇱 Netherlands): World War I: The tug was sunk in the North Sea 30 nmi off the Nieuwe Waterweg (51.83333°N, 3.05°W) by SMU UB-18.
 * SS Sir Walter (1878) ( undefined): World War I: The coaster was scuttled in the Atlantic Ocean (43.76667°N, -7.83333°W) by SMU UC-69 . All on board survived.
 * SS Thorsdal (1890) (🇳🇴 Norway): World War I: The cargo ship was sunk in the Atlantic Ocean west of Scotland (55.58333°N, -13.63333°W) by SMU U-44 . Her crew survived.
 * SS Viking (1906) (🇸🇪 Sweden): World War I: The cargo ship was torpedoed and sunk in the North Sea 15 nmi off Sognefjord, Norway by SMU U-67.
 * Zateja ( undefined): World War I: The sailing vessel was sunk in the Atlantic Ocean west of the Hebrides, Scotland by SMU U-45.
 * SS Zermatt (1907) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 355 nmi west by north of Ouessant (47.66667°N, -13.63333°W) by SMU U-46 ( with the loss of three crew.

25 July

 * SS Baldwin (1903) (🇳🇴 Norway): World War I: The cargo ship was sunk in the Atlantic Ocean off Cabo Toriñana, Spain (43.08333°N, -9.31667°W) by SMU UC-69 . Her crew survived.
 *  Dea (🇳🇴 Norway): World War I: The barque was scuttled in the Atlantic Ocean (60.33333°N, -4.01667°W) by SMU UC-49 . Her crew survived.
 * Janna (🇳🇱 Netherlands): World War I: The sailing vessel was scuttled in the North Sea 20 nmi off the Nieuwe Waterweg by SMU UB-18 . She was later salvaged, repaired and returned to service.
 * SS Monkstone (1909) ( undefined): World War I: The collier was torpedoed and sunk in the Atlantic Ocean 240 nmi west of the Isles of Scilly by SMU U-82 with the loss of a crew member.
 * RFA Oakleaf : World War I: The tanker was torpedoed and sunk in the Atlantic Ocean 64 nmi off the Butt of Lewis (59.01667°N, -7.43333°W) by SMU UC-41 . Her crew survived.
 * SS Peninsula (1877) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 235 nmi south west of the Fastnet Rock (48°N, -11.16667°W) by SMU U-46 with the loss of a crew member.
 * SS Purley (1913) ( undefined): World War I: The collier was torpedoed and sunk in the Atlantic Ocean 210 nmi south west of the Fastnet Rock (48.13333°N, -11.58333°W) by SMU U-46 . Her crew survived.
 * SS Rustington (1909) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 235 nmi west by south of Ouessant, Finistère, France by SMU U-54 . Her crew survived.
 * Spes Mea (🇳🇱 Netherlands): World War I: The sailing vessel was sunk in the North Sea off the Noord Hinder Lightship (🇳🇱 Netherlands) by SMU UB-18.
 *  Vaarbud (🇳🇴 Norway): World War I: The barque was scuttled in the Atlantic Ocean 40 nmi west north west of Ouessant by SMU UC-62 . Her crew survived.

26 July

 * HMS Ariadne (1898) : World War I: The was torpedoed and sunk in the English Channel off Beachy Head, East Sussex by SMU UC-65  with the loss of 38 of her crew.
 *  Bertha (🇵🇹 Portugal): World War I: The schooner was sunk in the Atlantic Ocean off Villa do Conde, Norte (41.33333°N, -8.96667°W) by SMU UC-69.
 *  Blanchette ( undefined): World War I: The schooner was captured and sunk in the Mediterranean Sea off Cape Corse, Corsica, France (42.95°N, 9.71667°W by SMU U-33 (Germany).
 * SS Carmarthen (1916) ( undefined): World War I: The cargo ship was torpedoed and damaged in the English Channel 2 nmi south east of The Lizard, Cornwall (49.95°N, -5.13333°W) by SMU UC-50 . She was taken under tow but sank at 50°N, -5.11667°W). Her crew survived.
 * Gesu E Maria ( undefined: World War I: The sailing vessel was sunk in the Mediterranean sea north of Cape Corse by SMU U-33 (Germany).
 * SS Locksley (1903) (🇳🇴 Norway): World War I: The cargos ship was sunk in the Atlantic Ocean off Villa do Conde (41.38333°N, -8.85°W by SMU UC-69 . Her crew survived.
 * SS Ludgate (1906) ( undefined): World War I: The cargo ship struck a mine and sank in the Atlantic Ocean 2 nmi south of Galley Head, County Cork with the loss of 24 of her crew.
 * SS Mooltan (1905) ( undefined): World War I: The passenger ship was torpedoed and sunk in the Mediterranean Sea 53 nmi north north west of Cape Serrat, Tunisia by SMU UC-27 with the loss of two lives.
 * PORTUGUESE TRAWLER Roberto Ivens : World War I: The naval trawler struck a mine and sank in the Atlantic Ocean north of Cape Espichel with the loss of fourteen of her crew.
 * SS Somerset (1903) ( undefined): World War I: The refrigerated cargo liner was torpedoed and sunk in the Atlantic Ocean 230 nmi west by south of Ouessant, Finistère, France by SMU U-54 . Her crew survived.
 * SMU UB-23 . World War I: The Type UB II submarine was depth charged and severely damaged in the English Channel off The Lizard by HMS PC-60 . She put into A Coruña, Spain where she was interned.
 * SMU UC-61 : World War I: The Type UC II submarine ran aground at Boulogne, Pas-de-Calais, France (50.88333°N, 1.55°W) and was scuttled.
 *  Venturoso (🇵🇹 Portugal): World War I: The barquentine was sunk in the Atlantic Ocean off Villa do Conde (41.35°N, -8.96667°W) by SMU UC-69.

27 July

 * SS Batavier II (1897) (🇳🇱 Netherlands): World War I: The passenger ship was shelled and sunk in the North Sea off Texel, North Holland by HMS E55.
 * SS Begona No.4 (1890) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 70 nmi west by north of the Fastnet Rock (51.25°N, -11.75°W) by SMU U-46 with the loss of two crew.
 * SS Bellagio (1890) ( undefined): World War I: The cargo ship was torpedoed and damaged in the English Channel 4 nmi south of the Owers Lightship ( undefined) by SMU UC-65 . She was beached but was later refloated.
 * SS Belle of England (1905) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 155 nmi west north west of the Fastnet Rock (53.9°N, -15.25°W) by SMU U-95 . Her crew survived.
 * SS Candia (1896) ( undefined}): World War I: The passenger ship was torpedoed and sunk in the English Channel 8 nmi south of the Owers Lighthship ( undefined) (50.53333°N, -0.43333°W) by SMU UC-65 with the loss of a crew member.
 *  Carmela (🇺🇸 United States): World War I: The auxiliary schooner was scuttled in the Atlantic Ocean 25 nmi south west of The Lizard, Cornwall, United Kingdom (49.63333°N, -5.61667°W) by SMU UC-62 . Her crew survived.
 * Dirk (🇳🇱 Netherlands): World War I: The fishing vessel was sunk in the North Sea 19 nmi off Zandvoort, North Holland by SMU UC-16 . Her crew survived.
 * Dirk van Duyne (🇳🇱 Netherlands): World War I: The fishing vessel was sunk in the north sea 19 nmi west north west of IJmuiden, North Holland by SMU UC-16 . Her crew survived.
 * Frigido ( undefined): World War I: The sailing vessel was sunk in the Gulf of Genoa by SMU U-33 (Germany).
 * SS Genova (1904) ( undefined): World War I: The cargo ship was sunk in the Gulf of Genoa 2 nmi off Portofino, Genoa (44.3°N, 9.25°W) by SMU U-33 (Germany).
 * Jan (🇳🇱 Netherlands): World War I: The fishing vessel was sunk in the North Sea 19 nmi west north west of IJmuiden by SMU UC-16 . Her crew survived.
 *  John Hays Hammond (🇺🇸 United States): World War I: The schooner was sunk in the Atlantic Ocean 350 nmi north west of Ireland (56.9°N, -14.3°W) by SMU U-44 . Her crew survived.
 * Majoor Thompson (🇳🇱 Netherlands): World War I: The fishing vessel was sunk in the North Sea 19 nmi off Zandvoort by SMU UC-16 . Her crew survived.
 * President Commisaris van den Burgh (🇳🇱 Netherlands): World War I: The fishing vessel was sunk in the North Sea off the Dutch coast by SMU UC-16 . Her crew survived.
 * Sterna III (🇳🇱 Netherlands): World War I: The fishing vessel was sunk in the North Sea 19 nmi west north west of IJmuiden by SMU UC-16 . Her crew survived.

28 July

 *  Atlas (🇫🇷 France): World War I: The barque was torpedoed and sunk in the Atlantic Ocean 200 nmi west of the Fastnet Rock (51.58333°N, -15.51667°W) by SMU U-30 (Germany) with the loss of all hands.
 * SS Glenstrae (1905) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 66 nmi south west by south of the Bishop Rock, Isles of Scilly (48.66667°N, -6.91667°W) by SMU UC-62 with the loss of a crew member.
 * SS Hildur (1897) (🇳🇴 Norway): World War I: The coaster was sunk in the Atlantic Ocean 2.5 nmi off Cape Sisargos, Spain by SMU UC-69 . Her crew survived.
 * Neptunus I (🇳🇱 Netherlands): World War I: The trawler was shelled and sunk in the North Sea off IJmuiden, North Holland by SMU UC-16 . Her crew survived.
 * SS Rigmor (1911) (🇩🇰 Denmark): World War I: The cargo ship was torpedoed and sunk in the North Sea 16 nmi off Holmengrå, Hordaland, Norway (60.81667°N, 4.08333°W) by SMU U-67 . Her crew survived.
 * SS Saint Emilion (1917) (🇫🇷 France): World War I: The cargo ship was sunk in the English Channel 12 nmi west by south of Dungeness, Kent, United Kingdom by SMU UC-65.
 * SMU UB-20 : World War I: The Type UB II submarine struck a mine and sank in the North Sea off Zeebrugge, West Flanders, Belgium (51.35°N, 2.63333°W) with the loss of all 13 crew.

29 July

 * SS Adalia (1899) ( undefined): World War I: The cargo ship was shelled and sunk in the North Sea 85 nmi north east of Muckle Flugga, Shetland Islands by SMU U-94 with the loss of a crew member.
 *  Anitra (🇳🇴 Norway): World War I: The barque was sunk in the North Sea 20 nmi off Hvidingsö by SMU U-96 . Her crew survived.
 * SS Bestwood (1913) ( undefined): The collier collided with Leander ( undefined and sank in the Irish Sea off the South Bishop Lighthouse.
 * SS Cesarevitch Alexei (1903) ( undefined): World War I: The cargo ship was sunk in the North Sea 8 to 10 nmi east of Lerwick, Shetland Islands by SMU U-60 . Her crew survived.
 * SS Gyldenpris (1906) (🇳🇴 Norway): World War I: The cargo ship was sunk in the Atlantic Ocean off A Coruña, Spain by SMU UC-69.
 * SS Ingeborg (1917) (🇩🇰 Denmark): World War I: The cargo ship was torpeoeded and sunk in the North Sea 85 nmi off Lerwick (60.26667°N, 1.41667°W) by SMU U-94 . Her crew survived.
 * SS Manchester Commerce (1906) ( undefined): World War I: The cargo ship was torpedoed, shelled and sunk in the Strait of Gibraltar (35.86667°N, -6.26667°W) by SMU U-39 with the loss of a crew member.
 * SS Okhla ( undefined): World War I: The cargo ship struck a mine and sank in the Indian Ocean 30 nmi west of Bombay, India with the loss of nine of her crew.
 * SS Saint Marcouf (1903) (🇫🇷 France): World War I: The cargo ship was sunk in the Irish Sea 6 nmi south east of the Arklow Lightship ( undefined) (52.88333°N, -5.83333°W) by SMU UC-75 . Her crew survived.
 * SMU UB-27 : World War I: The Type UB II submarine was probably rammed and sunk on this date by HMS Halcyon (1916) with the loss of all 22 crew.
 * SS Whitehall (1905) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 270 nmi west by north of the Fastnet Rock (50.08333°N, -16.46667°W) by SMU U-95 with the loss of a crew member.

30 July

 *  Amor (🇩🇰 Denmark): World War I: The three-masted barque was shelled and sunk in the North Sea (56.91667°N, 3.6°W) by SMU UC-40 . Her crew survived.
 * SS Canis (1911) (🇳🇴 Norway): World War I: The coaster was torpedoed and sunk in the Barents Sea 20 nmi west of Holmengrå, Finnmark by SMU U-60 with the loss of two crew.
 * SS Carlo (1912) ( undefined): World War I: The cargo ship was sunk in the Strait of Gibraltar off Tangier, Morocco (35.4°N, -6.41667°W) by SMU U-39.
 * SS Eolo (1877) ( undefined): World War I: The cargo ship was sunk in the Atlantic Ocean (53.9°N, -15.25°W) by SMU U-95.
 * SS Ganges (1902) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 8 nmi off Cape Spartel, Morocco (35.71667°N, -6°W) by SMU U-39 with the loss of a crew member.
 * Hansa ( undefined): The cargo ship collided with a trawler and sank in the Baltic Sea off Landsort, Sweden.
 * SS Kildin (1908) ( undefined): World War I: The cagro ship was sunk in the North Sea off Lerwick, Shetland Islands, United Kingdom (61.78333°N, -0.58333°W) by SMU U-94.
 * SS Manchester Inventor (1907) ( undefined): World War I: The cargo ship was shelled and sunk in the North Sea 80 nmi north north east of Muckle Flugga, Shetland Islands (61.45°N, -0.63333°W) by SMU U-94 . Her crew survived.
 * SS Souma (1907) ( undefined): World War I: The cargo ship was sunk in the North Sea north north east of Muckle Flugga (61.56667°N, -0.91667°W) by SMU U-94.

31 July

 *  Alcides (🇳🇴 Norway): World War I: The barque was sunk in the Atlantic Ocean north west of Ireland (55.08333°N, -17.08333°W) by SMU U-54 with the loss of all 23 crew.
 * SS Belgian Prince (1901) ( undefined): World War I: The cargo ship was torpedoed and damaged in the Atlantic Ocean 175 nmi north west of Tory Island, County Donegal by SMU U-55 . She was scuttled the next day with the loss of 40 crew.
 * SS Carolvore (1883) (🇳🇴 Norway): World War I: The cargo ship was sunk in the Strait of Gibraltar 6 nmi off Cape Roche, Spain (36.21667°N, -6.26667°W) by SMU U-39 . Her crew survived.
 * USS Chingachgook (SP-35) : The patrol vessel was damaged beyond repair by the explosion of her petrol tank at New York.
 * SS Del Norte (🇺🇸 United States): The cargo ship ran aground at Point Arena, California and was a total loss.
 * SS Empress (1893) ( undefined): World War I: The cargo ship struck a mine and sank in the North Sea 4.5 nmi east by south of the Withernsea Lighthouse, Yorkshire (53.75°N, 0.13333°W) by SMU UC-63 with the loss of five of her crew.
 * SS Fremona (1887) ( undefined): World War I: The cargo ship was torpedoed and sunk in the English Channel 10 nmi north by west of the Île de Batz, Finistère, France (48.91667°N, -4.18333°W) by SMU UC-47 with the loss of eleven of her crew.
 *  Madeleine (🇫🇷 France): World War I: The full-rigged ship was shelled and sunk in the Atlantic Ocean 190 nmi west of Madeira, Portugal (33.75°N, -22.83333°W) by SMU U-155 with the loss of eleven of her crew. Survivors were rescued by SS Santa Cecilia (🇺🇸 United States).
 * SS Motano (1890) (🇺🇸 United States): World War I: The tanker was torpedoed and sunk in the English Channel 20 nmi south east of Start Point, Devon, United Kingdom by SMU UC-47 with the loss of 24 of her crew.
 * SS Orubian (1914) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 160 nmi north west of Eagle Island, County Mayo (54.78333°N, -14.08333°W) by SMU U-82 with the loss of a crew member.
 * HMS Quernmore : World War I: The escort vessel was torpedoed and sunk in the Atlantic Ocean 160 nmi west north west of Tory Island (54.83333°N, -13.18333°W) by SMU U-82 with the loss of a crew member.
 * Regina (🇬🇷 Greece): World War I: The sailing vessel was sunk in the Mediterranean Sea by SMU UC-22.
 * SS Shimosa (1902) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 220 nmi north west of Eagle Island (55.23333°N, -15.08333°W) by SMU U-46 with the loss of seventeen crew.
 * SS Snowdonian (1907) ( undefined): World War I: The collier was scuttled in the Atlantic Ocean 245 nmi south by east of Santa Maria Island, Azores, Portugal (33.73333°N, -22.36667°W) by SMU U-155 . Her crew survived.
 * SS Ypres (1897) ( undefined): World War I: The coaster was shelled and sunk in the Strait of Gibraltar 2.75 nmi off Cape Roche (36.25°N, -6.23333°W) by SMU U-39 . Her crew survived.

Unknown date

 * SMU UC-1 : World War I: The Type UC I submarine struck a mine and sank in the North Sea off Nieuport, West Flanders, Belgium on or after 18 July with the loss of all seventeen crew.