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.

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

1 July

For the loss of the Norwegian barque Asalia on this date, see the entry for 30 June 1917

• Advance ( United Kingdom): World War I: The fishing smack was shelled and sunk in the North Sea by SM UC-63 ( Kaiserliche Marine). Her crew survived.^[1][2]
• Amstelland ( Netherlands): World War I: The cargo ship was sunk in the Atlantic Ocean 35 nautical miles (65 km) south of Galley Head, County Cork, United Kingdom by SM UC-30 ( Kaiserliche Marine).^[3]
• Angela Madre ( Italy): World War I: The sailing vessel was sunk in the Mediterranean Sea south of Sardinia by SM UC-67 ( Kaiserliche Marine).^[4]
• Ariel ( United Kingdom): World War I: The schooner was scuttled in the North Sea 15 nautical miles (28 km) east north east of Rattray Head, Aberdeenshire (57°45′N 1°12′W / 57.750°N 1.200°W / 57.750; -1.200) by SM UC-33 ( Kaiserliche Marine). Her crew survived.^[5]
• Bachi ( Spain): World War I: The cargo ship was sunk in the Bay of Biscay west of Sables d'Olonne, Vendée, France by SM U-84 ( Kaiserliche Marine).^[6]
• Corrado ( Italy): World War I: The sailing vessel was sunk in the Mediterranean Sea between Sardinia and Sicily by SM U-38 ( Kaiserliche Marine).^[7]
• Demerara ( United Kingdom): World War I: The passenger ship was torpedoed and damaged in the Bay of Biscay 6 nautical miles (11 km) west of Sables d'Olonne by SM U-84 ( Kaiserliche Marine) with the loss of a crew member. She was beached on the Île de Ré but was later refloated.^[8]
• Don Emilio ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 10 nautical miles (19 km) north west by west of the Esha Ness Lighthouse, Shetland Islands (60°33′N 2°08′W / 60.550°N 2.133°W / 60.550; -2.133) by SM U-80 ( Kaiserliche Marine with the loss of a crew member.^[9]
• Eclipse ( United Kingdom): World War I: The trawler was shelled and sunk in the Atlantic Ocean 100 nautical miles (190 km) north by west of Brough of Birsay, Orkney Islands by SM U-45 ( Kaiserliche Marine). Her crew survived.^[10]
• Gleam ( United Kingdom): World War I: The fishing smack was shelled and sunk in the North Sea by SM UC-63 ( Kaiserliche Marine). Her crew survived.^[2][11]
• Marie ( France): World War I: The sailing vessel was sunk in the Mediterranean Sea west of Sardinia by SM U-63 ( Kaiserliche Marine).^[12]
• Militades Embiricos ( Greece): World War I: The cargo ship was sunk in the Mediterranean Sea north of Bizerta, Algeria (37°58′N 9°40′E / 37.967°N 9.667°E / 37.967; 9.667) by SM UC-67 ( Kaiserliche Marine). Her crew survived.^[13]
• Radiance ( United Kingdom): World War I: The fishing smack was scuttled in the North Sea by SM UC-63 ( Kaiserliche Marine). Her crew survived.^[2][14]
• Volto Santo G. ( Italy): World War I: The sailing vessel was sunk in the Mediterranean Sea between Sardinia and Sicily (38°25′N 10°51′E / 38.417°N 10.850°E / 38.417; 10.850) by SM U-38 ( Kaiserliche Marine).^[15]

2 July

• Argentario ( Italy): World War I: The barque was scuttled in the Mediterranean Sea south of Sardinia (38°08′N 9°51′E / 38.133°N 9.850°E / 38.133; 9.850) by SM U-63 ( Kaiserliche Marine).^[16]
• Bessie ( Sweden): World War I: The trawler was shelled and sunk in the North Sea (61°55′N 1°10′E / 61.917°N 1.167°E / 61.917; 1.167) by SM U-86 ( Kaiserliche Marine). Her crew survived.^[17]
• General Buller ( United Kingdom): World War I: The drifter was shelled and sunk in the North Sea off Sumburgh Head, Shetland Islands by SM UC-33 ( Kaiserliche Marine). Her crew survived.^[18]
• Hamnavoe ( United Kingdom): World War I: The drifter was shelled and sunk in the North Sea off Sumburgh Head by SM UC-33 ( Kaiserliche Marine). Her crew survived.^[19]
• 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°40′N 1°20′E / 61.667°N 1.333°E / 61.667; 1.333) by SM U-57 ( Kaiserliche Marine). Her crew survived.^[20]
• Shinsan Maru ( Japan): World War I: The cargo ship was sunk in the Mediterranean Sea by SM UB-47 ( Kaiserliche Marine).^[21]
• Thirlby ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 122 nautical miles (226 km) north west by west of the Fastnet Rock (51°39′N 12°52′W / 51.650°N 12.867°W / 51.650; -12.867) by SM UC-30 ( Kaiserliche Marine) with the loss of two of her crew.^[22][23]

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°09′N 5°50′W / 60.150°N 5.833°W / 60.150; -5.833) by SM U-49 ( Kaiserliche Marine). Her crew survived.^[24]
• City of Cambridge ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 10 nautical miles (19 km) north west of Jijelli, Algeria by SM UC-67 ( Kaiserliche Marine). Her crew survived.^[23][25]
• HMT Drake II ( Royal Navy): The naval trawler was wrecked in the Kenmare River, County Cork.^[26]
• Henrik ( Norway): World War I: The cargo ship was torpedoed and sunk in the Bay of Biscay 60 nautical miles (110 km) west south west of Penmarc'h, Finistère, France (47°25′N 5°22′W / 47.417°N 5.367°W / 47.417; -5.367) by SM UC-72 ( Kaiserliche Marine). Her crew survived.^[27]
• Iceland ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 10 nautical miles (19 km) south west of Galley Head, County Cork by SM U-88 ( Kaiserliche Marine) with the loss of two of her crew.^[23][28]
• Immacolatina ( Italy): World War I: The sailing vessel was sunk in the Mediterranean Sea west of Sicily by SM U-63 ( Kaiserliche Marine).^[29]
• Marthe Roux ( France): World War I: The barque was scuttled in the Mediterranean Sea 25 nautical miles (46 km) off Cape Ivi, Algeria (36°30′N 0°13′E / 36.500°N 0.217°E / 36.500; 0.217) by SM U-34 ( Kaiserliche Marine).^[30]
• Mary Boyes ( Denmark): World War I: The fishing vessel was sunk in the Atlantic Ocean west of the Shetland Islands (60°09′N 5°50′W / 60.150°N 5.833°W / 60.150; -5.833) by SM U-49 ( Kaiserliche Marine). Her crew survived.^[31]
• Matador ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 115 nautical miles (213 km) west by north of the Fastnet Rock (51°16′N 12°25′W / 51.267°N 12.417°W / 51.267; -12.417) by SM UC-30 ( Kaiserliche Marine) with the loss of two of her crew.^[23][32]
• Mongara ( United Kingdom): World War I: The passenger ship was torpedoed and sunk in the Mediterranean Sea 1.5 nautical miles (2.8 km) off Messina, Sicily, Italy (38°10′N 15°36′E / 38.167°N 15.600°E / 38.167; 15.600) by SM U-28 ( Austro-Hungarian Navy). All on board survived.^[33]
• Orleans ( United States): World War I: The cargo ship was sunk in the Atlantic Ocean 165 nautical miles (306 km) west south west of Belle Île, Morbihan, France (47°12′N 7°40′W / 47.200°N 7.667°W / 47.200; -7.667) by SM UC-71 ( Kaiserliche Marine) with the loss of four of her crew.^[34]
• Proefneming I ( Netherlands): World War I: The fishing vessel was sunk in the Atlantic Ocean west of the Shetland Islands (60°09′N 5°50′W / 60.150°N 5.833°W / 60.150; -5.833) by SM U-49 ( Kaiserliche Marine). Her crew survived.^[35]
• Thor ( Netherlands): World War I: The fishing vessel was shelled and sunk in the Atlantic Ocean west of the Shetland Islands (60°09′N 5°50′W / 60.150°N 5.833°W / 60.150; -5.833 by SM U-49 ( Kaiserliche Marine). Her crew survived.^[36]

4 July

• HMS Aster ( Royal Navy): World War I: The Acacia-class sloop struck a mine and sank in the Mediterranean Sea off Malta with the loss of ten of her 77 crew.^[37]
• Bestevaer ( Netherlands): World War I: The cargo ship was sunk in the North Sea 6 nautical miles (11 km) off Scheveningen, South Holland by SM UC-21 ( Kaiserliche Marine). Her crew survived.^[38]
• Chrysolite ( United Kingdom): World War I: The fishing smack struck a mine and sank in the North Sea 4 nautical miles (7.4 km) north of the Haisbro Lightship ( United Kingdom) with the loss of five of her crew.^[39]
• Fratelli Bianchi ( Italy): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 4 nautical miles (7.4 km) off Cap de l'Aiguille (36°05′N 1°09′W / 36.083°N 1.150°W / 36.083; -1.150) by SM U-34 ( Kaiserliche Marine).^[40]
• Goathland ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Bay of Biscay 6.32 nautical miles (11.70 km) off Belle Île, Morbihan, France (47°11′N 3°08′W / 47.183°N 3.133°W / 47.183; -3.133 by SM U-84 ( Kaiserliche Marine) with the loss of 21 of her crew. One of the survivors was rescued by SM U-84.^[41]
• Hurstside ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 108 nautical miles (200 km) north north east of Cape Wrath, Sutherland (60°25′N 4°38′W / 60.417°N 4.633°W / 60.417; -4.633) by SM UC-54 ( Kaiserliche Marine). Her crew survived.^[23][42]
• Kodan ( Denmark): World War I: The schooner was scuttled in the Atlantic Ocean north west of Ireland by SM U-93 ( Kaiserliche Marine). Her crew survived.^[43]
• Loch Katrine ( United Kingdom): World War I: The trawler was shelled and sunk in the North Sea 85 nautical miles (157 km) east south east of Sandoy, Faroe Islands by SM U-87 ( Kaiserliche Marine). Her crew survived.^[2][44]
• HMS Mona ( Royal Navy): The Q-ship was lost in the Mediterranean Sea on this date.^[45]
• Snetoppen ( Norway): World War I: The cargo ship was sunk in the Atlantic Ocean 100 nautical miles (190 km) west south west of Ouessant, Finistère, France (47°30′N 7°05′W / 47.500°N 7.083°W / 47.500; -7.083) by SM UC-71 ( Kaiserliche Marine). Her crew survived.^[46]
• Ull ( Norway): World War I: The coaster was sunk in the English Channel 9 nautical miles (17 km) west north west of Portland Bill, Dorset, United Kingdom by SM UC-61 ( Kaiserliche Marine). Her crew survived.^[47]

5 July

• Bjerkø ( Norway): World War I: The cargo ship was torpedoed and sunk in the English Channel 7 nautical miles (13 km) north west of the Triagoz Lighthouse, Finistère, France (48°50′N 3°51′W / 48.833°N 3.850°W / 48.833; -3.850) by SM UB-18 ( Kaiserliche Marine) with the loss of sixteen crew.^[48]
• Ciboure ( France): World War I: The cargo ship was sunk in the Mediterranean Sea 22 nautical miles (41 km) south west of Gozo, Malta (35°55′N 13°41′E / 35.917°N 13.683°E / 35.917; 13.683) by SM U-65 ( Kaiserliche Marine).^[49]
• Cuyahoga ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 130 nautical miles (240 km) west north west of Tory Island, County Donegal (55°12′N 12°10′W / 55.200°N 12.167°W / 55.200; -12.167 (SS Cuyahoga)) by SM U-57 ( Kaiserliche Marine). Her crew survived.^[50][51]
• Havbris ( Norway): World War I: The coaster was torpedoed and sunk in the English Channel 3 nautical miles (5.6 km) south west of Prawle Point, Devon, United Kingdom by SM UB-32 ( Kaiserliche Marine). Her crew survived.^[52]
• Marionga Goulandris ( Greece): World War I: The cargo ship was sunk in the Mediterranean Sea off Cape Matapan (35°38′N 22°36′E / 35.633°N 22.600°E / 35.633; 22.600) by SM U-14 ( Austro-Hungarian Navy).^[53]
• Ocean Swell ( United Kingdom): World War I: The barquentine was shelled and sunk in the English Channel 15 nautical miles (28 km) south east of Start Point, Devon by SM UB-31 ( Kaiserliche Marine). Her crew survived.^[54]
• SM UC-7 ( Kaiserliche Marine): 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.^[55]

6 July

• Cumberland ( United Kingdom): World War I: The cargo ship struck a mine and sank in the Pacific Ocean 16 nautical miles (30 km) south west of Gabo Island, Victoria, Australia.^[23]
• Flora ( Norway): World War I: The passenger ship was sunk in the North Sea 12 nautical miles (22 km) north east of Lamba Ness, Shetland Islands, United Kingdom by SM U-52 ( Kaiserliche Marine).All on board survived.^[56]
• Handel en Visscherij ( Netherlands): World War I: The fishing vessel was shelled and sunk in the North Sea (56°50′N 5°20′E / 56.833°N 5.333°E / 56.833; 5.333) by SM UC-33 ( Kaiserliche Marine). Her crew survived.^[57]
• Indutiomare ( Belgium): World War I: The cargo ship was torpedoed and sunk in the English Channel (50°34′N 01°24′W / 50.567°N 1.400°W / 50.567; -1.400 (SS Indutiomare)) by SM UC-61 ( Kaiserliche Marine). Her crew survived.^[50][58]
• HMS Itchen ( Royal Navy): World War I: The E-class destroyer was torpedoed and sunk in the North Sea 70 nautical miles (130 km) north north east of Peterhead, Aberdeenshire (58°35′N 0°45′W / 58.583°N 0.750°W / 58.583; -0.750) by SM UC-44 ( Kaiserliche Marine) with the loss of eight of her 70 crew.^[59]
• Løvstakken ( Norway): World War I: The cargo ship was sunk in the Atlantic Ocean 40 nautical miles (74 km) north west of Ouessant, Finistère, France (48°00′N 5°43′W / 48.000°N 5.717°W / 48.000; -5.717) by SM UC-71 ( Kaiserliche Marine). Her crew survived.^[60]
• Motor ( Denmark): World War I: The auxiliary schooner was shelled and sunk in the North Sea off Utsira, Rogaland, Norway (59°22′N 2°45′E / 59.367°N 2.750°E / 59.367; 2.750) by SM U-58 ( Kaiserliche Marine). Her crew survived.^[61]
• Piet Hein ( Netherlands): World War I: The fishing vessel was shelled and sunk in the North Sea (56°50′N 5°20′E / 56.833°N 5.333°E / 56.833; 5.333) by SM UC-33 ( Kaiserliche Marine). Her crew survived.^[62]
• Roma ( Italy): World War I: The sailing vessel was sunk in the Strait of Sicily by SM U-65 ( Kaiserliche Marine).^[63]
• Skjald ( Norway): World War I: The barque was scuttled in the North Sea (57°03′N 4°46′E / 57.050°N 4.767°E / 57.050; 4.767) by SM UC-33 ( Kaiserliche Marine). Her crew survived.^[64]
• Victoria 2 ( Norway): World War I: The cargo ship was scuttled in the Atlantic Ocean 35 nautical miles (65 km) north of Ouessant by SM UC-71 ( Kaiserliche Marine). Her crew survived.^[65]

7 July

• Bellucia ( United Kingdom): World War I: The cargo ship was torpedoed and damaged in the English Channel 2 nautical miles (3.7 km) south south east of The Lizard, Cornwall (49°58′N 5°11′W / 49.967°N 5.183°W / 49.967; -5.183) by SM UB-31 ( Kaiserliche Marine) with the loss of four of her crew. She was taken in tow but consequently sank.^[23][66]
• Condesa ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 105 nautical miles (194 km) west of the Bishop Rock, Isles of Scilly (49°23′N 9°00′W / 49.383°N 9.000°W / 49.383; -9.000) by SM U-84 ( Kaiserliche Marine). Her crew survived.^[23][67]
• Coral Leaf ( United Kingdom): World War I: The sailing vessel was shelled and sunk in the Atlantic Ocean 18 nautical miles (33 km) north west by north of Tearaght Island, County Donegal by a Kaiserliche Marine submarine.^[23]
• HMT Kelvin ( Royal Navy): World War I: The naval trawler struck a mine and sank in the North Sea east of Aldeburgh, Suffolk (52°04′25″N 1°46′50″E / 52.07361°N 1.78056°E / 52.07361; 1.78056) with the loss of five of her crew.^[68]
• La Resolu ( France): World War I: The sailing vessel was sunk in the Mediterranean Sea by SM U-38 ( Kaiserliche Marine).^[69]
• Massapequa ( United States): World War I: The cargo ship was shelled and sunk in the Atlantic Ocean 200 nautical miles (370 km) west of Belle Île, Morbihan, France (46°40′N 9°00′W / 46.667°N 9.000°W / 46.667; -9.000) by SM UC-72 ( Kaiserliche Marine). Her crew survived.^[70]
• Milano ( Italy): World War I: The schooner was shelled and sunk in the Mediterranean Sea off Cape Sigli, Algeria (37°06′N 4°50′E / 37.100°N 4.833°E / 37.100; 4.833) by SM UC-67 ( Kaiserliche Marine).^[71]
• Mt 11 ( Imperial Russian Navy): World War I: The minesweeping boat struck a mine and sank in the Baltic Sea off Rauma, Finland.^[72]
• Mt 14 ( Imperial Russian Navy): World War I: The minesweeping boat struck a mine and sank in the Baltic Sea off Rauma.^[73]
• Oxø ( Norway): World War I: The barque was sunk in the Atlantic Ocean 90 nautical miles (170 km) west of the Isles of Scilly (49°32′N 8°17′W / 49.533°N 8.283°W / 49.533; -8.283) by SM U-84 ( Kaiserliche Marine). Her crew survived.^[74]
• USS Saxis ( United States Navy): The patrol vessel was wrecked at West Point, Virginia.
• Shigizan Maru ( 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.^[21]
• HMT Southesk ( Royal Navy): World War I: The naval trawler struck a mine and sank in Auskerry Sound (59°03′N 2°34′W / 59.050°N 2.567°W / 59.050; -2.567) with the loss of four of her crew.^[75]
• Southina ( United Kingdom): World War I: The collier was torpedoed and sunk in the Mediterranean Sea 6 nautical miles (11 km) north north west of Cape Sigli (36°52′N 4°56′E / 36.867°N 4.933°E / 36.867; 4.933) by SM UC-67 ( Kaiserliche Marine) with the loss of a crew member.^[23][76]
• Tarquah ( United Kingdom): World War I: The passenger ship was torpedoed and sunk in the Atlantic Ocean 10 nautical miles (19 km) south west of the Bull Rock (51°29′N 10°25′W / 51.483°N 10.417°W / 51.483; -10.417) by SM U-57 ( Kaiserliche Marine). Her crew survived.^[23][45][77]
• SM U-99 ( Kaiserliche Marine): World War I: The Type U 57 submarine was torpedoed and sunk in the North Sea (58°00′N 3°40′E / 58.000°N 3.667°E / 58.000; 3.667) by HMS J2 ( Royal Navy with the loss of all 40 crew.^[78]
• Wilberforce ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 25 nautical miles (46 km) south of the Cabo de Gata, Spain (36°23′N 2°22′W / 36.383°N 2.367°W / 36.383; -2.367) by SM U-34 ( Kaiserliche Marine) with the loss of a crew member. Two crew were taken as prisoners of war.^[23][79]

8 July

• Asheim ( Norway): World War I: The four-masted barque was scuttled in the Atlantic Ocean 120 nautical miles (220 km) north west of Inishtrahull Island, County Donegal, United Kingdom (57°33′N 7°55′W / 57.550°N 7.917°W / 57.550; -7.917) by SM U-53 ( Kaiserliche Marine) with the loss of a crew member.^[80]
• Atlantic ( Norway): World War I: The barque was sunk in the Atantic Ocean 20 nautical miles (37 km) south of St. Kilda, United Kingdom by SM U-53 ( Kaiserliche Marine). Her crew survived.^[81]
• Cambronne ( France): World War I: The barque was scuttled in the Atlantic Ocean 200 nautical miles (370 km) off the Île de Sein, Finistère (47°34′N 7°30′W / 47.567°N 7.500°W / 47.567; -7.500) by SM UC-72 ( Kaiserliche Marine).^[82]
• Fiorella ( Norway): World War I: The barque was scuttled in the Norwegian Sea 40 nautical miles (74 km) east of the Faroe Islands by SM U-58 ( Kaiserliche Marine). Her crew survived.^[83]
• L'Immortale Leone ( Italy): World War I: the brigantine was shelled and sunk in the Strait of Sicily (36°20′N 11°35′E / 36.333°N 11.583°E / 36.333; 11.583) by SM U-65 ( Kaiserliche Marine).^[84]
• Mary W. Bowen ( United States): World War I: The five-masted schooner was scuttled in the Atlantic Ocean west of Belle Île (47°20′N 8°10′W / 47.333°N 8.167°W / 47.333; -8.167) by SM UC-72 ( Kaiserliche Marine). Her crew survived.^[85]
• M. I. Mandal ( Denmark): World War I: The cargo ship was scuttled in the Atlantic Ocean 110 nautical miles (200 km) west of Ouessant, Finistère by SM UC-72 ( Kaiserliche Marine). Her crew survived.^[86]
• Obuasi ( United Kingdom): World War I: The passenger ship was torpedoed and sunk in the Atlantic Ocean 290 nautical miles (540 km) north west by west of the Fastnet Rock by SM U-49 ( Kaiserliche Marine) with the loss of two crew. Her captain was taken as a prisoner of war.^[23][87]
• Pegu ( United Kingdom): World War I: The cargo liner was torpedoed and sunk in the Atlantic Ocean 7 nautical miles (13 km)) south eath of Galley Head, County Cork (51°28′N 8°39′W / 51.467°N 8.650°W / 51.467; -8.650) by SM U-57 ( Kaiserliche Marine) with the loss of a crew member.^[88]
• Ruelle ( France): World War I: The cargo ship was sunk in the Atlantic Ocean 200 nautical miles (370 km) north west of Madeira, Portugal (approximately 38°N 18°W / 38°N 18°W / 38; -18) by SM U-155 ( Kaiserliche Marine).^[89]
• Spekulation ( Sweden): World War I: The barque was shelled and sunk in the North Sea 50 nautical miles (93 km) south east of Hartlepool, County Durham, United Kingdom by SM UC-55 ( Kaiserliche Marine). Her crew survived.^[90]
• Valetta ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 118 nautical miles (219 km) north west by west of the Fastnet Rock (51°49′N 12°22′W / 51.817°N 12.367°W / 51.817; -12.367) by SM U-87 ( Kaiserliche Marine). Her crew survived.^[91]
• Vendee ( United Kingdom): World War I: The cargo ship struck a mine and sank in the Bay of Biscay off the mouth of the Gironde (45°45′N 1°20′W / 45.750°N 1.333°W / 45.750; -1.333 with the loss of three of her crew.^[92]

9 July

• Ceres ( France): World War I: The brigantine was sunk in the Atlantic Ocean 130 nautical miles (240 km) west of Penmarc'h, Finistère (47°00′N 10°36′W / 47.000°N 10.600°W / 47.000; -10.600) by SM UC-72 ( Kaiserliche Marine).^[93]
• Iparraguirre ( Spain): World War I: The cargo ship was sunk in the Atlantic Ocean 40 nautical miles (74 km) north west of the Butt of Lewis, United Kingdom (59°08′N 6°10′W / 59.133°N 6.167°W / 59.133; -6.167) by SM U-66 ( Kaiserliche Marine) with the loss of a crew member.^[94]
• Prince Abbas ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the North Sea 29 nautical miles (54 km) east of Fair Isle by SM U-52 ( Kaiserliche Marine) with the loss of two crew.^[23][95]
• HMS Vanguard ( Royal Navy): The St. Vincent-class battleship exploded and sank at Scapa Flow, Orkney Isles with the loss of 804 of her 806 crew.

10 July

• Cedric ( United Kingdom): World War I: The trawler was scuttled in the Atlantic Ocean 55 nautical miles (102 km) south by west of Suðuroy, Faroe Islands by SM U-53 ( Kaiserliche Marine). Her crew survived.^[2][96]
• City of Washington ( United States): The coal barge came ashore at Key Largo, Florida and was wrecked.
• Flamma ( United Kingdom): 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.^[97]
• Garmoyle ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 14 nautical miles (26 km) south east of Mine Head, County Cork (51°49′N 6°52′W / 51.817°N 6.867°W / 51.817; -6.867) by SM U-57 ( Kaiserliche Marine) with the loss of twenty crew.^[23][98]
• Hildegard ( United States): World War I: The barquentine was scuttled in the English Channel 10 nautical miles (19 km) south east of Start Point, Devon, United Kingdom by SM UB-31 ( Kaiserliche Marine). Her crew survived.^[99]
• Jadhigar-i-Millet ( Ottoman Navy): World War I: The S165-class destroyer was bombed and sunk in the Bosphorus (39°56′00″N 29°10′30″E / 39.93333°N 29.17500°E / 39.93333; 29.17500) by a Royal Naval Air Service handley Page bomber. She was later refloated and scrapped.^[100]
• Jupiter ( France): World War I: The trawler struck a mine and sank in the English Channel with the loss of eleven of her crew.^[101]
• Kansan ( United States): World War I: The cargo ship struck a mine and sank in the Bay of Biscay 2 nautical miles (3.7 km) east of Kerdonis Point, Belle Île, Morbihan, France (47°20′N 3°03′W / 47.333°N 3.050°W / 47.333; -3.050) with the loss of four of her crew.^[102]
• King David ( United Kingdom): World War I: The cargo ship was shelled and sunk in the Atlantic Ocean 360 nautical miles (670 km) north west of the Fastnet Rock by SM U-49 ( Kaiserliche Marine) with the loss of two crew.^[23][103]
• Mabel ( United Kingdom): World War I: The trawler was scuttled in the Atlantic Ocean off Suðuroy by SM U-53 ( Kaiserliche Marine). Her crew survived.^[104]
• Pacific ( United Kingdom): World War I: The trawler was scuttled in the Atlantic Ocean off Suðuroy by SM U-53 ( Kaiserliche Marine). Her crew survived.^[105]
• Peridot ( United Kingdom): World War I: The trawler was scuttled in the Atlantic Ocean off Suðuroy by SM U-53 ( Kaiserliche Marine). Her crew survived.^[106]
• Pretoria ( United Kingdom): World War I: The trawler was shelled and sunk in the Atlantic Ocean 130 nautical miles (240 km) north by west of Hoy Head, Shetland Islands by SM U-53 ( Kaiserliche Marine). Her crew survived.^[2][107]
• Romantic ( United Kingdom): World War I: The trawler was scuttled in the Atlantic Ocean off Suðuroy by SM U-53 ( Kaiserliche Marine). Her crew survived.^[108]
• Sea King ( United Kingdom): World War I: The trawler was scuttled in the Atlantic Ocean 60 nautical miles (110 km) south by east of Suðuroy by SM U-53 ( Kaiserliche Marine). Her crew survived.^[109]
• Seang Choon ( United Kingdom): World War I: The passenger ship was torpedoed and sunk in the Atlantic Ocean 10 nautical miles (19 km) south west of the Fastnet Rock by SM U-87 ( Kaiserliche Marine) with the loss of nineteen lives.^[23][110]
• Stoic ( United Kingdom): World War I: The trawler was scuttled in the Atlantic Ocean off Suðuroy by SM U-53 ( Kaiserliche Marine). Her crew survived.^[111]
• HMT Vale of Leven ( Royal Navy): The naval trawler was lost on this date.^[45]
• Yâdigâr-ı-Millet ( Ottoman Navy): World War I: The S165-class destroyer was bombed and sunk at İstinye, Turkey by Royal Naval Air Service aircraft with the loss of 26 of her crew.^[112]

11 July

• Anglo-Patagonian ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Bay of Biscay 20 nautical miles (37 km) west south west of Sables d'Olonne, Vendée, France (46°26′N 2°10′W / 46.433°N 2.167°W / 46.433; -2.167) by SM UC-72 ( Kaiserliche Marine) with the loss of four of her crew.^[23][113]
• Brunhilda ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the English Channel 7 nautical miles (13 km) south east of Start Point, Devon by SM UB-31 ( Kaiserliche Marine). Her crew survived.^[23][114]
• Kioto ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 20 nautical miles (37 km) south west of the Fastnet Rock (51°07′N 9°51′W / 51.117°N 9.850°W / 51.117; -9.850) by SM U-87 ( Kaiserliche Marine). Her crew survived.^[115]
• Siracusa ( Italy): World War I: The cargo ship struck a mine and sank in the Mediterranean Sea.^[116]
• SM U-69 ( Kaiserliche Marine): 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 ( Royal Navy but post-war evaluation casts doubt that U-69 was the victim. Lost with all 40 crew.
• Vanda ( Sweden): World War I: The cargo ship was sunk in the North Sea (60°15′N 1°20′E / 60.250°N 1.333°E / 60.250; 1.333) by SM U-52 ( Kaiserliche Marine).^[117]
• Vordingborg ( Denmark): World War I: The cargo ship was scuttled in the English Channel 25 nautical miles (46 km) north east of Ouessant, Finistère (48°52′N 5°16′W / 48.867°N 5.267°W / 48.867; -5.267) by SM UC-77 ( Kaiserliche Marine). Her crew survived.^[118]

12 July

• Balzac ( Norway): World War I: The cargo ship was torpedoed and sunk in the North Sea off Lerwick, Shetland Islands, United Kingdom (58°50′N 0°46′W / 58.833°N 0.767°W / 58.833; -0.767) by SM UC-55 ( Kaiserliche Marine). Her crew survived.^[119]
• Calliope ( United Kingdom): World War I: The collier was sunk in the Atlantic Ocean 150 nautical miles (280 km) north of Madeira, Portugal by SM U-155 ( Kaiserliche Marine) with the loss of all 27 crew.^[120][121]
• Castleton ( United Kingdom): World War I: The cargo ship was shelled and sunk in the Atlantic Ocean 60 nautical miles (110 km) south south west of the Bishop Rock, Isles of Scilly by SM U-87 ( Kaiserliche Marine). Her crew survived.^[23][122]
• Claire ( Belgium): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 250 nautical miles (460 km) north east of Bône, Algeria(40°01′N 06°05′E / 40.017°N 6.083°E / 40.017; 6.083 (SS Claire)) by SM U-38 ( Kaiserliche Marine) with the loss of 26 crew.^[123][124]
• Francesco ( Italy): World War I: The brigantine was scuttled in the Mediterranean Sea 10 nautical miles (19 km) west of Marsala, Sicily (37°31′N 12°18′E / 37.517°N 12.300°E / 37.517; 12.300) by SM UC-67 ( Kaiserliche Marine).^[125]
• Fredrika ( Sweden): World War I: The cargo ship was torpedoed and damaged in the North Sea 50 nautical miles (93 km) off the Orkney Islands, United Kingdom (59°08′N 0°54′E / 59.133°N 0.900°E / 59.133; 0.900) by SM U-52 ( Kaiserliche Marine). She was subsequently taken in tow but foundered 9 nautical miles (17 km) east of Auskerry.^[126]
• HMT George Milburn ( Royal Navy): World War I: The naval trawler struck a mine and sank in the Irish Sea 1.5 nautical miles (2.8 km) south of Dunmore Point, County Waterford with the loss of eleven of her crew.^[127]
• Grace ( United States): World War I: The cargo ship was sunk in the Aegean Sea 5 nautical miles (9.3 km) north of Cape Phessos, Andros, Greece (38°11′N 24°41′E / 38.183°N 24.683°E / 38.183; 24.683) by SM UC-38 ( Kaiserliche Marine) with the loss of three of her crew.^[128]
• Lai ( Norway): World War I: The auxiliary schooner was sunk in the North Sea 40 nautical miles (74 km) west of Egersund, Rogaland by SM UC-55 ( Kaiserliche Marine). Her crew survived.^[129]
• Leonardo G. ( Italy): World War I: The vessel was sunk in the Mediterranean Sea 10 nautical miles (19 km) west of Marsala by SM UC-67 ( Kaiserliche Marine).^[130]
• Maija ( Russia): World War I: The schooner was sunk in the Atlantic Ocean off the coast of Portugal by SM UC-54 ( Kaiserliche Marine).^[131]
• Muirfield ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 350 nautical miles (650 km) north west of the Fastnet Rock by SM U-49 ( Kaiserliche Marine) with the loss of two crew. Two survivors were taken as prisoners of war.^[23][132]
• Ondine ( France): World War I: The schooner was scuttled in the Mediterranean Sea 5 nautical miles (9.3 km) north of Denia, Spain by SM U-34 ( Kaiserliche Marine). All six crew survived.^[133]

13 July

• Afram ( Denmark): World War I: The sailing vessel was sunk in the North Sea 90 to 100 nautical miles (170 to 190 km) east of Girdle Ness, Aberdeenshire, United Kingdom by SM UC-45 ( Kaiserliche Marine).^[134]
• Ascain ( France): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 11 nautical miles (20 km) north of the Stiff Lighthouse, Ouessant, Finistère by SM UC-77 ( Kaiserliche Marine).^[135]
• Charialos Tricoupis ( Greece): World War I: The cargo ship was sunk in the Atlantic Ocean off Bantry, County Cork, United Kingdom (52°25′N 12°54′W / 52.417°N 12.900°W / 52.417; -12.900) by SM U-58 ( Kaiserliche Marine).^[136]
• Ceres ( Denmark): World War I: The cargo ship was sunk in the Atlantic Ocean off Inistrahull Island, County Donegal, United Kingdom (56°00′N 12°00′W / 56.000°N 12.000°W / 56.000; -12.000) by SM U-88 ( Kaiserliche Marine) with the loss of two of her crew.^[93]
• Gibel-Yedid ( United Kingdom): World War I: The coaster was scuttled in the Atlantic Ocean 150 nautical miles (280 km) west of Ouessant by SM U-48 ( Kaiserliche Marine). Her crew survived.^[23][137]
• Loanda ( Portugal): World War I: The schooner was shelled and sunk in the Atlantic Ocean 50 nautical miles (93 km) off Cape Roca by SM UC-54 ( Kaiserliche Marine).^[138]

14 July

• Bonus ( Finland): World War I: The vessel was sunk in the Baltic Sea off Mäntyluoto by SM UC-58 ( Kaiserliche Marine).^[139]
• Chalkydon ( Greece): World War I: The cargo ship was sunk in the Atlantic Ocean 600 nautical miles (1,100 km) west of Gibraltar (34°10′N 17°25′W / 34.167°N 17.417°W / 34.167; -17.417) by SM U-155 ( Kaiserliche Marine). Her crew survived.^[140]
• Emanuel ( Denmark): World War I: The schooner was sunk in the Atlantic Ocean west of the Orkney Islands, United Kingdom (59°35′N 6°00′W / 59.583°N 6.000°W / 59.583; -6.000) by SM U-96 ( Kaiserliche Marine). Her crew survived; they were rescued by HMS G12 ( Royal Navy).^[141]
• Exford ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 180 nautical miles (330 km) west by south of Ouessant, Finistère, France (46°48′N 8°50′W / 46.800°N 8.833°W / 46.800; -8.833) by SM U-48 ( Kaiserliche Marine) with the loss of six crew.^[23][142]

15 July

• Atalante ( France): World War I: The barque was sunk in the Mediterranean Sea south east of the Balearic Islands, Spain by SM U-38 ( Kaiserliche Marine).^[143]
• Dinorwic ( United Kingdom): World War I: The three-masted schooner was scuttled in the English Channel 10 nautical miles (19 km) south by east of Hastings, East Sussex by SM UB-40 ( Kaiserliche Marine). Her crew survived.^[144]
• Dudhope ( United Kingdom): World War I: The full-rigged ship was scuttled in the Atlantic Ocean 200 nautical miles (370 km) west of the Fastnet Rock by SM U-49 ( Kaiserliche Marine). Her crew survived.^[23][145]
• Ebenezer ( United Kingdom): World War I: The brig was scuttled in the English Channel 25 nautical miles (46 km) north west of Dieppe, Seine-Maritime, France by SM UB-40 ( Kaiserliche Marine). Her crew survived.^[146]
• Mariston ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 82 nautical miles (152 km) west of the Fastnet Rock (50°52′N 11°38′W / 50.867°N 11.633°W / 50.867; -11.633) by SM U-45 ( Kaiserliche Marine) with the loss of 28 crew.^[23][147]
• HMS Redbreast ( Royal Navy: World War I: The fleet messenger was sunk in the Aegean Sea by SM UC-38 ( Kaiserliche Marine) with the loss of 44 lives. One of the survivors was taken as a prisoner of war.^[148]
• Torcello ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 160 nautical miles (300 km) south west by west of the Bishop Rock, Isles of Scilly by SM U-48 ( Kaiserliche Marine) with the loss of a crew member.^[23][149]
• Trelissick ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 80 nautical miles (150 km) south west by west of Ouessant, Finistère, France (47°28′N 6°28′W / 47.467°N 6.467°W / 47.467; -6.467) by SM UC-72 ( Kaiserliche Marine). Her crew survived, but three of them were taken as prisoners of war.^[23][150]

16 July

• HMT Asama ( Royal Navy): World War I: The trawler, operating as a Q-ship, was shelled and sunk in the Atlantic Ocean 190 nautical miles (350 km) due west of Lundy Island, Devon by SM U-48 ( Kaiserliche Marine) with the loss of a crew member.^[121][151]
• Cyrus ( Russia): World War I: The three-masted schooner was torpedoed and sunk in the Atlantic Ocean west of the Hebrides, United Kingdom (57°53′N 10°35′W / 57.883°N 10.583°W / 57.883; -10.583) by SM U-30 ( Kaiserliche Marine).^[152]
• Firfield ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Gulf of Patras 10 nautical miles (19 km) north west of Cape Papas, Greece (37°42′N 25°47′E / 37.700°N 25.783°E / 37.700; 25.783) by SM UC-38 ( Kaiserliche Marine). Her crew survived.^[23][153]
• Henry R. James ( United Kingdom): World War I: The cargo ship was sunk in the Atlantic Ocean 10 nautical miles (19 km) east by north of the Île de Batz, Finistère, France (48°49′N 3°46′W / 48.817°N 3.767°W / 48.817; -3.767) by SM UC-48 ( Kaiserliche Marine) with the loss of 24 of her crew.^[154]
• Khephren ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 178 nautical miles (330 km) east of Malta (36°15′N 18°00′E / 36.250°N 18.000°E / 36.250; 18.000) by SM U-32 ( Kaiserliche Marine). Her crew survived.^[23][155]
• Lamia L. ( Italy): World War I: The cargo ship was sunk in the Atlantic Ocean south west of Ireland by SM U-49 and SM U-58 (both  Kaiserliche Marine). Her crew survived.^[156]
• Porto di Adalia ( Italy): World War I: The cargo ship was sunk in the Mediterranean Sea 150 nautical miles (280 km) east of Malta (34°40′N 18°40′E / 34.667°N 18.667°E / 34.667; 18.667) by SM U-32 ( Kaiserliche Marine).^[157]
• Ribston ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 85 nautical miles (157 km) west of the Fastnet Rock (50°52′N 11°38′W / 50.867°N 11.633°W / 50.867; -11.633) by SM U-45 ( Kaiserliche Marine) with the loss of 25 crew.^[158]
• Tamele ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 65 nautical miles (120 km) west by south of the Fastnet Rock by SM U-87 ( Kaiserliche Marine) with the loss of a crew member.^[23][159]
• Timor ( Netherlands): World War I: The coaster was scuttled in the North Sea 18 nautical miles (33 km) south of the Noord Hinder Lightship ( Netherlands) by SM UC-64 ( Kaiserliche Marine).^[160]
• Valentia ( United Kingdom): World War I: The collier was torpedoed and sunk in the Atlantic Ocean 70 nautical miles (130 km) west by south of the Bishop Rock, Isles of Scilly by SM UC-41 ( Kaiserliche Marine) with the loss of three of her crew.^{[23][45][161]}
• Vesta ( Denmark): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean north of Scotland by SM U-88 ( Kaiserliche Marine) with the loss of five of her crew.^[162]

17 July

• HMS C34 ( Royal Navy): World War I: The C-class submarine was sunk off the Shetland Islands (59°51′N 1°05′W / 59.850°N 1.083°W / 59.850; -1.083) by SM U-52 ( Kaiserliche Marine) with the loss of eighteen of her nineteen crew. The survivor was rescued by U-52.^[163]
• 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.^[164]
• Haworth ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 94 nautical miles (174 km) west of the Fastnet Rock (50°47′N 11°55′W / 50.783°N 11.917°W / 50.783; -11.917) by SM U-45 ( Kaiserliche Marine). Her crew survived.^[165]
• HMS Newmarket ( Royal Navy): World War I: The auxiliary minesweeper) was torpedoed and sunk in the Aegean Sea south of Icaria, Greece (37°17′N 26°15′E / 37.283°N 26.250°E / 37.283; 26.250) by SM UC-38 ( Kaiserliche Marine) with the loss of 44 of her crew. Three of the survivors were taken as prisoners of war.^[166]
• Virent ( United Kingdom): World War I: The cargo ship was torpedoed and damaged in the Mediterranean Sea (35°40′N 14°45′E / 35.667°N 14.750°E / 35.667; 14.750) by SM U-32 ( Kaiserliche Marine). She was beached but was refloated on 19 July. Subsequently repaired and returned to service.^[167]

18 July

• HMT Betsy Sim ( Royal Navy): The naval trawler was lost on this date.^[121]
• Ellen ( Norway): World War I: The cargo ship was scuttled in the Atlantic Ocean (36°40′N 23°40′W / 36.667°N 23.667°W / 36.667; -23.667)) by SM U-155 ( Kaiserliche Marine). Her crew survived.^[168]

19 July

• Artensis ( Norway): World War I: The full-rigged ship was scuttled in the Atlantic Ocean west of Ireland 54°32′N 11°07′W / 54.533°N 11.117°W / 54.533; -11.117) by SM U-87 ( Kaiserliche Marine). Her crew survived.^[169]
• Clan McLachlan ( United Kingdom): The collier collided with Europa ( Italy) and sank in the Atlantic Ocean 60 nautical miles (110 km) south west of Cape Spartel, Morocco with the loss of six of her crew.^[121][170]
• Eloby ( United Kingdom): World War I: The troopship was torpedoed and sunk in the Mediterranean Sea 75 nautical miles (139 km) south east by east of Malta (35°11′N 15°38′E / 35.183°N 15.633°E / 35.183; 15.633) by SM U-38 ( Kaiserliche Marine) with the loss of over 156 lives.^[171]
• Harrildsborg ( Denmark): World War I: The cargo ship was torpedoed and sunk in the North Sea 24 nautical miles (44 km) west of Holmengrå, Hordaland, Norway (60°47′N 4°09′E / 60.783°N 4.150°E / 60.783; 4.150) by SM U-67 ( Kaiserliche Marine). Her crew survived and were rescued by HMS Arab ( Royal Navy).^[172]
• Varvara ( Greece): World War I: The cargo ship was shelled and sunk in the Mediterranean Sea off Cape Spartivento, Calabria by SM U-32 ( Kaiserliche Marine).^[173]

20 July

• Beatrice ( United Kingdom): World War I: The coaster was torpedoed and sunk in the English Channel 10 nautical miles (19 km) east by south of The Lizard, Cornwall (49°57′N 4°57′W / 49.950°N 4.950°W / 49.950; -4.950) by SM UC-47 ( Kaiserliche Marine) with the loss of eleven of her crew.^[174]
• Bramham ( United Kingdom): World War I: The cargo ship struck a mine and sank in the English Channel 10 nautical miles (19 km) east by south of The Lizard (50°01′N 4°56′W / 50.017°N 4.933°W / 50.017; -4.933) with the loss of a crew member.^[175]
• City of Florence ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 188 nautical miles (348 km) west by north of Ouessant, Finistère, France (47°45′N 9°45′W / 47.750°N 9.750°W / 47.750; -9.750) by SM UC-17 ( Kaiserliche Marine). Her crew survived.^[23][176]
• Fluent ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the English Channel 15 nautical miles (28 km) south west of Portland Bill, Dorset (50°26′N 1°52′W / 50.433°N 1.867°W / 50.433; -1.867) by SM UC-65 ( Kaiserliche Marine). Her crew survived.^[177]
• Hanseat ( Norway): World War I: The cargo ship was sunk in the Atlantic Ocean 105 nautical miles (194 km) south east by south of Santa Maria Island, Azores, Portugal (36°00′N 23°12′W / 36.000°N 23.200°W / 36.000; -23.200) by SM U-155 ( Kaiserliche Marine). Her crew survived.^[178]
• Kageshima Maru ( Japan): World War I: The cargo ship was sunk in the Atlantic Ocean 90 nautical miles (170 km) west of Ouessant (47°29′N 6°20′W / 47.483°N 6.333°W / 47.483; -6.333) by SM UC-69 ( Kaiserliche Marine).^[179]
• L. H. Carl ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the English Channel 14 nautical miles (26 km) west of Portland Bill (50°26′N 2°48′W / 50.433°N 2.800°W / 50.433; -2.800) by SM UB-40 ( Kaiserliche Marine) with the loss of two of her crew.^[23][180]
• Nevisbrook ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 90 nautical miles (170 km) west of the Fastnet Rock by SM U-45 ( Kaiserliche Marine). Her crew survived.^[181]
• HMS Queen of the North ( Royal Navy): World War I: The auxiliary minesweeper struck a mine and sank in the North Sea north east of the Shipwash Lightship ( United Kingdom) (52°03′15″N 1°49′39″E / 52.05417°N 1.82750°E / 52.05417; 1.82750) with the loss of 29 of her crew.^[182]
• HMT Robert Smith ( Royal Navy): The naval trawler was lost in the Atlantic Ocean on this date.^[45]
• Salsette ( United Kingdom): World War I: The passenger ship was torpedoed and sunk in the English Channel 15 nautical miles (28 km) south west of Portland Bill by SM UB-40 ( Kaiserliche Marine) with the loss of fifteen lives.^[23][183]

21 July

• African Prince ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 60 nautical miles (110 km) north north west of Tory Island, County Donegal (56°00′N 9°30′W / 56.000°N 9.500°W / 56.000; -9.500) by SM U-66 ( Kaiserliche Marine). Her crew survived.^[23][113]
• Augustus Welt ( United States): World War I: The four-masted schooner was sunk in the Atlantic Ocean 130 nautical miles (240 km) south west of Ouessant, Finistère, France by SM UC-17 ( Kaiserliche Marine). Her crew survived.^[184]
• Coniston Water ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 70 nautical miles (130 km) north by west of the Butt of Lewis (59°29′N 7°36′W / 59.483°N 7.600°W / 59.483; -7.600) by SM U-87 ( Kaiserliche Marine). Her crew survived, but one of them was taken as a prisoner of war.^[23][185]
• Dafila ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 85 nautical miles (157 km) west by south of the Fastnet Rock by SM U-45 ( Kaiserliche Marine) with the loss of two crew.^[23][186]
• Doris ( Italy): World War I: The cargo ship was scuttled in the Atlantic Ocean 90 nautical miles (170 km) south west of Santa Maria Island, Azores, Portugal by SM U-155 ( Kaiserliche Marine).^[187]
• Harold ( United Kingdom): World War I: The barque was torpedoed and sunk in the Atlantic Ocean 65 nautical miles (120 km) north north west of Tory Island by SM U-66 ( Kaiserliche Marine) with the loss of thirteen crew.^[188]
• John Twohy ( United States): World War I: The four-masted schooner was sunk in the Atlantic Ocean 120 nautical miles (220 km) south of the Azores by SM U-155 ( Kaiserliche Marine). Her crew survived.^[189]
• Paddington ( United Kingdom): World War I: The cargo liner was torpedoed and sunk in the Atlantic Ocean 250 nautical miles (460 km) west of the Fastnet Rock (49°47′N 15°40′W / 49.783°N 15.667°W / 49.783; -15.667) by SM U-96 ( Kaiserliche Marine) with the loss of 29 lives.^[23][190]
• Ramilles ( United Kingdom): World War I: The cargo ship was shelled and sunk in the Atlantic Ocean 120 nautical miles (220 km) west north west of Tory Island (55°24′N 11°08′W / 55.400°N 11.133°W / 55.400; -11.133) by SM U-58 ( Kaiserliche Marine). Her crew survived, but her captain was taken as a prisoner of war.^[191]
• HMT Robert Smith ( Royal Navy): World War I: The naval trawler was shelled and sunk in the Atlantic Ocean by SM U-44 ( Kaiserliche Marine) with the loss of all 25 crew. Her last known position was 59°14′N 9°40′W / 59.233°N 9.667°W / 59.233; -9.667.^[192]
• Trelyon ( United Kingdom): World War I: The cargo ship struck a mine in the North Sea 3 nautical miles (5.6 km) north of Scarborough, Yorkshire (54°18′N 0°20′W / 54.300°N 0.333°W / 54.300; -0.333). She was beached but was a total loss.^[193]
• Willena Gertrude ( United Kingdom): World War I: The schooner was scuttled in the Atlantic Ocean 120 nautical miles (220 km) south by east of Santa Maria Island, Azores (35°25′N 23°26′W / 35.417°N 23.433°W / 35.417; -23.433) by SM U-155 ( Kaiserliche Marine). Her crew survived.^[194]

22 July

• Breda ( Netherlands): World War I: The coaster was torpedoed and damaged in the North Sea 7 nautical miles (13 km) west of the Noord Hinder Lightship ( Netherlands) by SM UB-35 ( Kaiserliche Marine). She was then shelled and sunk 8 nautical miles (15 km) south west of the Noord Hinder Lightship by SM UB-18 ( Kaiserliche Marine).^[195]
• Cotovia ( United Kingdom): World War I: The cargo ship struck a mine and sank in the North Sea 2 nautical miles (3.7 km) south east by east of Auskerry, Orkney Islands (59°01′N 2°37′W / 59.017°N 2.617°W / 59.017; -2.617). Her crew survived.^[196]
• Dafila ( United Kingdom: World War I: The cargo ship was sunk by a U-boat. Twenty six survivors rescued by USS Jacob Jones ( United States Navy).
• Glow ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the North Sea off Robin Hood's Bay, Yorkshire (54°23′N 0°23′W / 54.383°N 0.383°W / 54.383; -0.383) by SM UB-21 ( Kaiserliche Marine) with the loss of a crew member.^[23][197]
• Nereus ( Netherlands): World War I: The sailing vessel was scuttled in the North Sea 10 nautical miles (19 km) south by east of the Noord Hinder Lightship ( Netherlands) by SM UB-18 ( Kaiserliche Marine).^[198]
• HMS Otway ( Royal Navy): World War I: The armed merchant cruiser was torpedoed and sunk in the Atlantic Ocean north of the Butt of Lewis, Outer Hebrides (58°54′N 6°28′W / 58.900°N 6.467°W / 58.900; -6.467) by SM UC-49 ( Kaiserliche Marine) with the loss of ten lives.^[199][200]
• HMT Orphesia ( Royal Navy): The naval trawler struck a submerged wreck and sank in the Mediterranean Sea off Alexandria, Egypt.^[201]
• Rota ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the English Channel 7 nautical miles (13 km) east by south of Berry Head, Devon by SM UB-40 ( Kaiserliche Marine) with the loss of five of her crew.^[23][202]

23 July

• Ashleigh ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 290 nautical miles (540 km) south west of the Fastnet Rock by SM U-54 ( Kaiserliche Marine). Her crew survived.^[23][203]
• Frithjof ( Norway): World War I: The cargo ship was sunk in the Atlantic Ocean off Cape Prior, Spain (43°39′N 2°10′W / 43.650°N 2.167°W / 43.650; -2.167) by SM UC-69 ( Kaiserliche Marine). Her crew survived.^[204]
• Huelva ( United Kingdom): World War I: The collier was torpedoed and sunk in the Atlantic Ocean 270 nautical miles (500 km) south west of the Fastnet Rock by SM U-54 ( Kaiserliche Marine). Her crew survived.^{[23][121][205]}
• HMML 474 ( Royal Navy): The motor launch was lost in the Mediterranean Sea on this date.^[45]
• HMS Otway ( Royal Navy): World War I: The armed merchant cruiser was torpedoed and sunk in the Atlantic Ocean off the Hebrides by SM UC-49 ( Kaiserliche Marine) with the loss of ten of her crew.
• Vanland ( Sweden): World War I: The cargo ship was damaged in the North Sea off Whitby, Yorkshire, United Kingdom by SM UB-21 ( Kaiserliche Marine). She was beached but was a total loss.^[206]

24 July

• Blake ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 30 nautical miles (56 km) north west of Cape Wrath, Sutherland by SM UC-49 ( Kaiserliche Marine) with the loss of five of her crew.^[23][207]
• Brumaire ( United Kingdom) World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 265 nautical miles (491 km) west by north of Ouessant, Finistère, France (48°20′N 11°41′W / 48.333°N 11.683°W / 48.333; -11.683) by SM U-46 ( Kaiserliche Marine) with the loss of two crew.^[23][208]
• HMS C34 ( Royal Navy): World War I: The C-class submarine was sunk by SM U-52 ( Kaiserliche Marine) in the Atlantic Ocean off Fair Isle with the loss of fifteen of her sixteen crew.
• Mikelis ( Greece): The cargo ship sank in the Atlantic Ocean (54°20′N 5°06′W / 54.333°N 5.100°W / 54.333; -5.100).^[209]
• Montevideo 488 ( Uruguay): World War I: The floating crane was sunk in the North Sea 30 nautical miles (56 km) off the Nieuwe Waterweg, Netherlands (51°50′N 3°03′E / 51.833°N 3.050°E / 51.833; 3.050) by SM UB-18 ( Kaiserliche Marine).^[210]
• Oostzee ( Netherlands): World War I: The tug was sunk in the North Sea 30 nautical miles (56 km) off the Nieuwe Waterweg (51°50′N 3°03′E / 51.833°N 3.050°E / 51.833; 3.050) by SM UB-18 ( Kaiserliche Marine).^[211]
• Sir Walter ( United Kingdom): World War I: The coaster was scuttled in the Atlantic Ocean (43°46′N 7°50′W / 43.767°N 7.833°W / 43.767; -7.833) by SM UC-69 ( Kaiserliche Marine). All on board survived.^[23][212]
• Thorsdal ( Norway): World War I: The cargo ship was sunk in the Atlantic Ocean west of Scotland (55°35′N 13°38′W / 55.583°N 13.633°W / 55.583; -13.633) by SM U-44 ( Kaiserliche Marine). Her crew survived.^[213]
• Viking ( Sweden): World War I: The cargo ship was torpedoed and sunk in the North Sea 15 nautical miles (28 km) off Sognefjord, Norway by SM U-67 ( Kaiserliche Marine).^[214]
• Zateja ( Russia): World War I: The sailing vessel was sunk in the Atlantic Ocean west of the Hebrides, Scotland by SM U-45 ( Kaiserliche Marine).^[215]
• Zermatt ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 355 nautical miles (657 km) west by north of Ouessant (47°40′N 13°38′W / 47.667°N 13.633°W / 47.667; -13.633) by SM U-46 ( Kaiserliche Marine with the loss of three crew.^[23][216]

25 July

• Baldwin ( Norway): World War I: The cargo ship was sunk in the Atlantic Ocean off Cabo Toriñana, Spain (43°05′N 9°19′W / 43.083°N 9.317°W / 43.083; -9.317) by SM UC-69 ( Kaiserliche Marine). Her crew survived.^[217]
• Dea ( Norway): World War I: The barque was scuttled in the Atlantic Ocean (60°20′N 4°01′W / 60.333°N 4.017°W / 60.333; -4.017) by SM UC-49 ( Kaiserliche Marine). Her crew survived.^[218]
• Janna ( Netherlands): World War I: The sailing vessel was scuttled in the North Sea 20 nautical miles (37 km) off the Nieuwe Waterweg by SM UB-18 ( Kaiserliche Marine). She was later salvaged, repaired and returned to service.^[219]
• Monkstone ( United Kingdom): World War I: The collier was torpedoed and sunk in the Atlantic Ocean 240 nautical miles (440 km) west of the Isles of Scilly by SM U-82 ( Kaiserliche Marine) with the loss of a crew member.^{[23][45][220]}
• RFA Oakleaf ( Royal Fleet Auxiliary): World War I: The tanker was torpedoed and sunk in the Atlantic Ocean 64 nautical miles (119 km) off the Butt of Lewis (59°01′N 7°26′W / 59.017°N 7.433°W / 59.017; -7.433) by SM UC-41 ( Kaiserliche Marine). Her crew survived.
• Peninsula ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 235 nautical miles (435 km) south west of the Fastnet Rock (48°00′N 11°10′W / 48.000°N 11.167°W / 48.000; -11.167) by SM U-46 ( Kaiserliche Marine) with the loss of a crew member.^[23][221]
• Purley ( United Kingdom): World War I: The collier was torpedoed and sunk in the Atlantic Ocean 210 nautical miles (390 km) south west of the Fastnet Rock (48°08′N 11°35′W / 48.133°N 11.583°W / 48.133; -11.583) by SM U-46 ( Kaiserliche Marine). Her crew survived.^{[23][45][222]}
• Rustington ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 235 nautical miles (435 km) west by south of Ouessant, Finistère, France by SM U-54 ( Kaiserliche Marine). Her crew survived.^[23][223]
• Spes Mea ( Netherlands): World War I: The sailing vessel was sunk in the North Sea off the Noord Hinder Lightship ( Netherlands) by SM UB-18 ( Kaiserliche Marine).^[21]
• Vaarbud ( Norway): World War I: The barque was scuttled in the Atlantic Ocean 40 nautical miles (74 km) west north west of Ouessant by SM UC-62 ( Kaiserliche Marine). Her crew survived.^[224]

26 July

• HMS Ariadne ( Royal Navy): World War I: The Diadem-class cruiser was torpedoed and sunk in the English Channel off Beachy Head, East Sussex by SM UC-65 ( Kaiserliche Marine) with the loss of 38 of her crew.^[225]
• Bertha ( Portugal): World War I: The schooner was sunk in the Atlantic Ocean off Villa do Conde, Norte (41°20′N 8°58′W / 41.333°N 8.967°W / 41.333; -8.967) by SM UC-69 ( Kaiserliche Marine).^[226]
• Blanchette ( Italy): World War I: The schooner was captured and sunk in the Mediterranean Sea off Cape Corse, Corsica, France (42°57′N 9°43′E / 42.950°N 9.717°E / 42.950; 9.717 by SM U-33 ( Kaiserliche Marine).^[123][227]
• Carmarthen ( United Kingdom): World War I: The cargo ship was torpedoed and damaged in the English Channel 2 nautical miles (3.7 km) south east of The Lizard, Cornwall (49°57′N 5°08′W / 49.950°N 5.133°W / 49.950; -5.133) by SM UC-50 ( Kaiserliche Marine). She was taken under tow but sank at 50°00′N 5°07′W / 50.000°N 5.117°W / 50.000; -5.117). Her crew survived.^[228]
• Gesu E Maria ( Italy: World War I: The sailing vessel was sunk in the Mediterranean sea north of Cape Corse by SM U-33 ( Kaiserliche Marine).^[229]
• Locksley ( Norway): World War I: The cargos ship was sunk in the Atlantic Ocean off Villa do Conde (41°23′N 8°51′W / 41.383°N 8.850°W / 41.383; -8.850 by SM UC-69 ( Kaiserliche Marine). Her crew survived.^[230]
• Ludgate ( United Kingdom): World War I: The cargo ship struck a mine and sank in the Atlantic Ocean 2 nautical miles (3.7 km) south of Galley Head, County Cork with the loss of 24 of her crew.^[231]
• Mooltan ( United Kingdom): World War I: The passenger ship was torpedoed and sunk in the Mediterranean Sea 53 nautical miles (98 km) north north west of Cape Serrat, Tunisia by SM UC-27 ( Kaiserliche Marine) with the loss of two lives.^[23][232]
• Roberto Ivens ( Portuguese Navy): 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.^[233]
• Somerset ( United Kingdom): World War I: The refrigerated cargo liner was torpedoed and sunk in the Atlantic Ocean 230 nautical miles (430 km) west by south of Ouessant, Finistère, France by SM U-54 ( Kaiserliche Marine). Her crew survived.^[23][234]
• SM UB-23 ( Kaiserliche Marine). 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 ( Royal Navy). She put into A Coruña, Spain where she was interned.^[235]
• SM UC-61 ( Kaiserliche Marine): World War I: The Type UC II submarine ran aground at Boulogne, Pas-de-Calais, France (50°53′N 1°33′E / 50.883°N 1.550°E / 50.883; 1.550) and was scuttled.
• Venturoso ( Portugal): World War I: The barquentine was sunk in the Atlantic Ocean off Villa do Conde (41°21′N 8°58′W / 41.350°N 8.967°W / 41.350; -8.967) by SM UC-69 ( Kaiserliche Marine).^[236]

27 July

• Batavier II ( Netherlands): World War I: The passenger ship was shelled and sunk in the North Sea off Texel, North Holland by HMS E55 ( Royal Navy).
• Begona No.4 ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 70 nautical miles (130 km) west by north of the Fastnet Rock (51°15′N 11°45′W / 51.250°N 11.750°W / 51.250; -11.750) by SM U-46 ( Kaiserliche Marine) with the loss of two crew.^[237]
• Bellagio ( United Kingdom): World War I: The cargo ship was torpedoed and damaged in the English Channel 4 nautical miles (7.4 km) south of the Owers Lightship ( United Kingdom) by SM UC-65 ( Kaiserliche Marine). She was beached but was later refloated.^[238]
• Belle of England ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 155 nautical miles (287 km) west north west of the Fastnet Rock (53°54′N 15°15′W / 53.900°N 15.250°W / 53.900; -15.250) by SM U-95 ( Kaiserliche Marine). Her crew survived.^[239]
• Candia ( United Kingdom}): World War I: The passenger ship was torpedoed and sunk in the English Channel 8 nautical miles (15 km; 9.2 mi) south of the Owers Lighthship ( United Kingdom) (50°32′N 0°26′W / 50.533°N 0.433°W / 50.533; -0.433) by SM UC-65 ( Kaiserliche Marine) with the loss of a crew member.^[23][240]
• Carmela ( United States): World War I: The auxiliary schooner was scuttled in the Atlantic Ocean 25 nautical miles (46 km) south west of The Lizard, Cornwall, United Kingdom (49°38′N 5°37′W / 49.633°N 5.617°W / 49.633; -5.617) by SM UC-62 ( Kaiserliche Marine). Her crew survived.^[241]
• Dirk ( Netherlands): World War I: The fishing vessel was sunk in the North Sea 19 nautical miles (35 km) off Zandvoort, North Holland by SM UC-16 ( Kaiserliche Marine). Her crew survived.^[242]
• Dirk van Duyne ( Netherlands): World War I: The fishing vessel was sunk in the north sea 19 nautical miles (35 km) west north west of IJmuiden, North Holland by SM UC-16 ( Kaiserliche Marine). Her crew survived.^[243]
• Frigido ( Italy): World War I: The sailing vessel was sunk in the Gulf of Genoa by SM U-33 ( Kaiserliche Marine).^[244]
• Genova ( Italy): World War I: The cargo ship was sunk in the Gulf of Genoa 2 nautical miles (3.7 km) off Portofino, Genoa (44°18′N 9°15′E / 44.300°N 9.250°E / 44.300; 9.250) by SM U-33 ( Kaiserliche Marine).^[245]
• Jan ( Netherlands): World War I: The fishing vessel was sunk in the North Sea 19 nautical miles (35 km) west north west of IJmuiden by SM UC-16 ( Kaiserliche Marine). Her crew survived.^[246]
• John Hays Hammond ( United States): World War I: The schooner was sunk in the Atlantic Ocean 350 nautical miles (650 km) north west of Ireland (56°54′N 14°18′W / 56.900°N 14.300°W / 56.900; -14.300) by SM U-44 ( Kaiserliche Marine). Her crew survived.^[247]
• Majoor Thompson ( Netherlands): World War I: The fishing vessel was sunk in the North Sea 19 nautical miles (35 km) off Zandvoort by SM UC-16 ( Kaiserliche Marine). Her crew survived.^[248]
• President Commisaris van den Burgh ( Netherlands): World War I: The fishing vessel was sunk in the North Sea off the Dutch coast by SM UC-16 ( Kaiserliche Marine). Her crew survived.^[249]
• Sterna III ( Netherlands): World War I: The fishing vessel was sunk in the North Sea 19 nautical miles (35 km) west north west of IJmuiden by SM UC-16 ( Kaiserliche Marine). Her crew survived.^[250]

28 July

• Atlas ( France): World War I: The barque was torpedoed and sunk in the Atlantic Ocean 200 nautical miles (370 km) west of the Fastnet Rock (51°35′N 15°31′W / 51.583°N 15.517°W / 51.583; -15.517) by SM U-30 ( Kaiserliche Marine) with the loss of all hands.^[251]
• Glenstrae ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 66 nautical miles (122 km) south west by south of the Bishop Rock, Isles of Scilly (48°40′N 6°55′W / 48.667°N 6.917°W / 48.667; -6.917) by SM UC-62 ( Kaiserliche Marine) with the loss of a crew member.^[23][252]
• Hildur ( Norway): World War I: The coaster was sunk in the Atlantic Ocean 2.5 nautical miles (4.6 km) off Cape Sisargos, Spain by SM UC-69 ( Kaiserliche Marine). Her crew survived.^[253]
• Neptunus I ( Netherlands): World War I: The trawler was shelled and sunk in the North Sea off IJmuiden, North Holland by SM UC-16 ( Kaiserliche Marine). Her crew survived.^[254]
• Rigmor ( Denmark): World War I: The cargo ship was torpedoed and sunk in the North Sea 16 nautical miles (30 km) off Holmengrå, Hordaland, Norway (60°49′N 4°05′E / 60.817°N 4.083°E / 60.817; 4.083) by SM U-67 ( Kaiserliche Marine). Her crew survived.^[255]
• Saint Emilion ( France): World War I: The cargo ship was sunk in the English Channel 12 nautical miles (22 km) west by south of Dungeness, Kent, United Kingdom by SM UC-65 ( Kaiserliche Marine).^[256]
• SM UB-20 ( Kaiserliche Marine): World War I: The Type UB II submarine struck a mine and sank in the North Sea off Zeebrugge, West Flanders, Belgium (51°21′N 2°38′E / 51.350°N 2.633°E / 51.350; 2.633) with the loss of all 13 crew.^[257]

29 July

• Adalia ( United Kingdom): World War I: The cargo ship was shelled and sunk in the North Sea 85 nautical miles (157 km) north east of Muckle Flugga, Shetland Islands by SM U-94 ( Kaiserliche Marine) with the loss of a crew member.^[23][258]
• Anitra ( Norway): World War I: The barque was sunk in the North Sea 20 nautical miles (37 km) off Hvidingsö by SM U-96 ( Kaiserliche Marine). Her crew survived.^[259]
• Bestwood ( United Kingdom): The collier collided with Leander ( United Kingdom and sank in the Irish Sea off the South Bishop Lighthouse.^[260]
• Cesarevitch Alexei ( Russia): World War I: The cargo ship was sunk in the North Sea 8 to 10 nautical miles (15 to 19 km) east of Lerwick, Shetland Islands by SM U-60 ( Kaiserliche Marine). Her crew survived.^[261]
• Gyldenpris ( Norway): World War I: The cargo ship was sunk in the Atlantic Ocean off A Coruña, Spain by SM UC-69 ( Kaiserliche Marine).^[262]
• Ingeborg ( Denmark): World War I: The cargo ship was torpeoeded and sunk in the North Sea 85 nautical miles (157 km) off Lerwick (60°16′N 1°25′E / 60.267°N 1.417°E / 60.267; 1.417) by SM U-94 ( Kaiserliche Marine). Her crew survived.^[263]
• Manchester Commerce ( United Kingdom): World War I: The cargo ship was torpedoed, shelled and sunk in the Strait of Gibraltar (35°52′N 6°16′W / 35.867°N 6.267°W / 35.867; -6.267) by SM U-39 ( Kaiserliche Marine) with the loss of a crew member.^[264]
• Okhla ( United Kingdom): World War I: The cargo ship struck a mine and sank in the Indian Ocean 30 nautical miles (56 km) west of Bombay, India with the loss of nine of her crew.^[23]
• Saint Marcouf ( France): World War I: The cargo ship was sunk in the Irish Sea 6 nautical miles (11 km) south east of the Arklow Lightship ( United Kingdom) (52°53′N 5°50′W / 52.883°N 5.833°W / 52.883; -5.833) by SM UC-75 ( Kaiserliche Marine). Her crew survived.^[265]
• SM UB-27 ( Kaiserliche Marine): World War I: The Type UB II submarine was probably rammed and sunk on this date by HMS Halcyon ( Royal Navy) with the loss of all 22 crew.
• Whitehall ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 270 nautical miles (500 km) west by north of the Fastnet Rock (50°05′N 16°28′W / 50.083°N 16.467°W / 50.083; -16.467) by SM U-95 ( Kaiserliche Marine) with the loss of a crew member.^[23][266]

30 July

• Amor ( Denmark): World War I: The three-masted barque was shelled and sunk in the North Sea (56°55′N 3°36′E / 56.917°N 3.600°E / 56.917; 3.600) by SM UC-40 ( Kaiserliche Marine). Her crew survived.^[267]
• Canis ( Norway): World War I: The coaster was torpedoed and sunk in the Barents Sea 20 nautical miles (37 km) west of Holmengrå, Finnmark by SM U-60 ( Kaiserliche Marine) with the loss of two crew.^[268]
• Carlo ( Italy): World War I: The cargo ship was sunk in the Strait of Gibraltar off Tangier, Morocco (35°24′N 6°25′W / 35.400°N 6.417°W / 35.400; -6.417) by SM U-39 ( Kaiserliche Marine).^[269]
• Eolo ( Italy): World War I: The cargo ship was sunk in the Atlantic Ocean (53°54′N 15°15′W / 53.900°N 15.250°W / 53.900; -15.250) by SM U-95 ( Kaiserliche Marine).^[270]
• Ganges ( Italy): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 8 nautical miles (15 km) off Cape Spartel, Morocco (35°43′N 6°00′W / 35.717°N 6.000°W / 35.717; -6.000) by SM U-39 ( Kaiserliche Marine) with the loss of a crew member.^[23][271]
• Hansa ( Germany): The cargo ship collided with a trawler and sank in the Baltic Sea off Landsort, Sweden.^[272]
• Kildin ( Russia): World War I: The cargo ship was sunk in the North Sea off Lerwick, Shetland Islands, United Kingdom (61°47′N 0°35′W / 61.783°N 0.583°W / 61.783; -0.583) by SM U-94 ( Kaiserliche Marine).^[273]
• Manchester Inventor ( United Kingdom): World War I: The cargo ship was shelled and sunk in the North Sea 80 nautical miles (150 km) north north east of Muckle Flugga, Shetland Islands (61°27′N 0°38′W / 61.450°N 0.633°W / 61.450; -0.633) by SM U-94 ( Kaiserliche Marine). Her crew survived.^[23][274]
• Souma ( Russia): World War I: The cargo ship was sunk in the North Sea north north east of Muckle Flugga (61°34′N 0°55′W / 61.567°N 0.917°W / 61.567; -0.917) by SM U-94 ( Kaiserliche Marine).^[275]

31 July

• Alcides ( Norway): World War I: The barque was sunk in the Atlantic Ocean north west of Ireland (55°05′N 17°05′W / 55.083°N 17.083°W / 55.083; -17.083) by SM U-54 ( Kaiserliche Marine) with the loss of all 23 crew.^[276]
• Belgian Prince ( United Kingdom): World War I: The cargo ship was torpedoed and damaged in the Atlantic Ocean 175 nautical miles (324 km) north west of Tory Island, County Donegal by SM U-55 ( Kaiserliche Marine). She was scuttled the next day with the loss of 40 crew.^[277]
• Carolvore ( Norway): World War I: The cargo ship was sunk in the Strait of Gibraltar 6 nautical miles (11 km) off Cape Roche, Spain (36°13′N 6°16′W / 36.217°N 6.267°W / 36.217; -6.267) by SM U-39 ( Kaiserliche Marine). Her crew survived.^[278]
• USS Chingachgook ( United States Navy): The patrol vessel was damaged beyond repair by the explosion of her petrol tank at New York.
• Del Norte ( United States): The cargo ship ran aground at Point Arena, California and was a total loss.^[279]
• Empress ( United Kingdom): World War I: The cargo ship struck a mine and sank in the North Sea 4.5 nautical miles (8.3 km) east by south of the Withernsea Lighthouse, Yorkshire (53°45′N 0°08′E / 53.750°N 0.133°E / 53.750; 0.133) by SM UC-63 ( Kaiserliche Marine) with the loss of five of her crew.^[280]
• Fremona ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the English Channel 10 nautical miles (19 km) north by west of the Île de Batz, Finistère, France (48°55′N 4°11′W / 48.917°N 4.183°W / 48.917; -4.183) by SM UC-47 ( Kaiserliche Marine) with the loss of eleven of her crew.^[23][281]
• Madeleine ( France): World War I: The full-rigged ship was shelled and sunk in the Atlantic Ocean 190 nautical miles (350 km) west of Madeira, Portugal (33°45′N 22°50′W / 33.750°N 22.833°W / 33.750; -22.833) by SM U-155 ( Kaiserliche Marine) with the loss of eleven of her crew. Survivors were rescued by Santa Cecilia ( United States).^[282]
• Motano ( United States): World War I: The tanker was torpedoed and sunk in the English Channel 20 nautical miles (37 km) south east of Start Point, Devon, United Kingdom by SM UC-47 ( Kaiserliche Marine) with the loss of 24 of her crew.^[283]
• Orubian ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 160 nautical miles (300 km) north west of Eagle Island, County Mayo (54°47′N 14°05′W / 54.783°N 14.083°W / 54.783; -14.083) by SM U-82 ( Kaiserliche Marine) with the loss of a crew member.^[23][284]
• HMS Quernmore ( Royal Navy): World War I: The escort vessel was torpedoed and sunk in the Atlantic Ocean 160 nautical miles (300 km) west north west of Tory Island (54°50′N 13°11′W / 54.833°N 13.183°W / 54.833; -13.183) by SM U-82 ( Kaiserliche Marine) with the loss of a crew member.^[23][285]
• Regina ( Greece): World War I: The sailing vessel was sunk in the Mediterranean Sea by SM UC-22 ( Kaiserliche Marine).^[286]
• Shimosa ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 220 nautical miles (410 km) north west of Eagle Island (55°14′N 15°05′W / 55.233°N 15.083°W / 55.233; -15.083) by SM U-46 ( Kaiserliche Marine) with the loss of seventeen crew.^[23][287]
• Snowdonian ( United Kingdom): World War I: The collier was scuttled in the Atlantic Ocean 245 nautical miles (454 km) south by east of Santa Maria Island, Azores, Portugal (33°44′N 22°22′W / 33.733°N 22.367°W / 33.733; -22.367) by SM U-155 ( Kaiserliche Marine). Her crew survived.^{[23][45][288]}
• Ypres ( United Kingdom): World War I: The coaster was shelled and sunk in the Strait of Gibraltar 2.75 nautical miles (5.09 km) off Cape Roche (36°15′N 6°14′W / 36.250°N 6.233°W / 36.250; -6.233) by SM U-39 ( Kaiserliche Marine). Her crew survived.^[23][289]

Unknown date

• SM UC-1 ( Kaiserliche Marine): 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.^[290]

References

Shipwrecks 1914–18, by month 1914 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Unknown date 1915 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Unknown date 1916 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Unknown date 1917 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Unknown date 1918 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Unknown date

Ship events in 1917
Ship launches:	1912	1913	1914	1915	1916	1917	1918	1919	1920	1921	1922
Ship commissionings:	1912	1913	1914	1915	1916	1917	1918	1919	1920	1921	1922
Ship decommissionings:	1912	1913	1914	1915	1916	1917	1918	1919	1920	1921	1922
Shipwrecks:	1912	1913	1914	1915	1916	1917	1918	1919	1920	1921	1922