# List of shipwrecks in July 1917

The list of shipwrecks in July 1917 includes 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
List of shipwrecks: 1 July 1917 :
| Ship | State | Description |
| Advance | United Kingdom | World War I: The fishing smack was shelled and sunk in the North Sea by SM UC-63 ( Imperial German Navy). Her crew survived. |
| 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-31 ( Imperial German Navy). |
| Angela Madre | Italy | World War I: The sailing vessel was sunk in the Mediterranean Sea south of Sardinia by SM UC-67 ( Imperial German Navy). |
| 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 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). |
| Corrado | Italy | World War I: The sailing vessel was sunk in the Mediterranean Sea between Sardinia and Sicily by SM U-38 ( Imperial German Navy). |
| 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 ( Imperial German Navy) with the loss of a crew member. She was beached on the Île de Ré but was later refloated. |
| 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 ( Imperial German Navy with the loss of a crew member. |
| 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 ( Imperial German Navy). Her crew survived. |
| Gleam | United Kingdom | World War I: The fishing smack was shelled and sunk in the North Sea by SM UC-63 ( Imperial German Navy). Her crew survived. |
| Marie | France | World War I: The sailing vessel was sunk in the Mediterranean Sea west of Sardinia by SM U-63 ( Imperial German Navy). |
| 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 ( Imperial German Navy). Her crew survived. |
| Radiance | United Kingdom | World War I: The fishing smack was scuttled in the North Sea by SM UC-63 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). |

## 2 July

List of shipwrecks: 2 July 1917 :
| Ship | State | Description |
| 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 ( Imperial German Navy). |
| 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 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). Her crew survived. |
| Hamnavoe | United Kingdom | World War I: The drifter was shelled and sunk in the North Sea off Sumburgh Head by SM UC-33 ( Imperial German Navy). 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°40′N 1°20′E﻿ / ﻿61.667°N 1.333°E﻿ / 61.667; 1.333) by SM U-57 ( Imperial German Navy). Her crew survived. |
| Shinsan Maru | Japan | World War I: The cargo ship was sunk in the Mediterranean Sea by SM UB-47 ( Imperial German Navy). |
| 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-31 ( Imperial German Navy) with the loss of two of her crew. |

## 3 July

List of shipwrecks: 3 July 1917 :
| Ship | State | Description |
| 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 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). Her crew survived. |
| HMT Drake II | Royal Navy | The naval trawler was wrecked in the Kenmare River, County Kerry. |
| 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 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy) with the loss of two of her crew. |
| Immacolatina | Italy | World War I: The sailing vessel was sunk in the Mediterranean Sea west of Sicily by SM U-63 ( Imperial German Navy). |
| 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 ( Imperial German Navy). |
| 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 ( Imperial German Navy). Her crew survived. |
| 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-31 ( Imperial German Navy) with the loss of two of her crew. |
| 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. |
| Orleans | United States | World War I: The cargo ship was torpedoed and 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 ( Imperial German Navy) 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°09′N 5°50′W﻿ / ﻿60.150°N 5.833°W﻿ / 60.150; -5.833) by SM U-49 ( Imperial German Navy). 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°09′N 5°50′W﻿ / ﻿60.150°N 5.833°W﻿ / 60.150; -5.833 by SM U-49 ( Imperial German Navy). Her crew survived. |

## 4 July

List of shipwrecks: 4 July 1917 :
| Ship | State | Description |
| 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. |
| 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 ( Imperial German Navy). Her crew survived. |
| 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. |
| 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 ( Imperial German Navy). |
| 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 ( Imperial German Navy) with the loss of 21 of her crew. One of the survivors was rescued by SM U-84. |
| 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 ( Imperial German Navy). Her crew survived. |
| Kodan | Denmark | World War I: The schooner was scuttled in the Atlantic Ocean north west of Ireland by SM U-93 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). Her crew survived. |
| HMS Mona | Royal Navy | The Q-ship was lost in the Mediterranean Sea on this date. |
| 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 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). Her crew survived. |
| Unknown submarine | Unknown | World War I: The submarine was shelled and sunk in the English Channel in a gun battle with the tanker Navajo ( United States). |

## 5 July

List of shipwrecks: 5 July 1917 :
| Ship | State | Description |
| 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 ( Imperial German Navy) with the loss of sixteen crew. |
| 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 ( Imperial German Navy). |
| Cumberland | Australia | World War I: The coastal cargo ship was damaged by a mine off Gabo Island and was beached, partially sunk. Temporary repairs were made and she was refloated and towed off on 11 August. |
| 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 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). Her crew survived. |
| 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). |
| 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 ( Imperial German Navy). Her crew survived. |
| SM UC-7 | Imperial German Navy | 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

List of shipwrecks: 6 July 1917 :
| Ship | State | Description |
| AG-14 | Imperial Russian Navy | World War I: The AG-class submarine was sunk off Libava, probably by a mine. |
| 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. |
| 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 ( Imperial German Navy). All on board survived. |
| 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 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy) with the loss of eight of her 70 crew. |
| 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 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). Her crew survived. |
| Roma | Italy | World War I: The sailing vessel was sunk in the Strait of Sicily by SM U-65 ( Imperial German Navy). |
| 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 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). Her crew survived. |

## 7 July

List of shipwrecks: 7 July 1917 :
| Ship | State | Description |
| 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 ( Imperial German Navy) with the loss of four of her crew. She was taken in tow but consequently sank. |
| Condesa | United Kingdom | World War I: The refrigerated cargo ship was torpedoed 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 ( Imperial German Navy), a voyage from Montevideo to Falmouth. Her crew and passengers were rescued and landed at Falmouth. Although eventually taken in tow, she sank on 9 September, 30 nautical miles (56 km) from the Scillies. |
| 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 an Imperial German Navy submarine. |
| 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. |
| La Resolu | France | World War I: The sailing vessel was sunk in the Mediterranean Sea by SM U-38 ( Imperial German Navy). |
| 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 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). |
| Mt 11 | Imperial Russian Navy | World War I: The minesweeping boat struck a mine and sank in the Baltic Sea off Rauma, Finland. |
| Mt 14 | Imperial Russian Navy | 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 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 ( Imperial German Navy). Her crew survived. |
| 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. |
| 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. |
| 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 ( Imperial German Navy) with the loss of a crew member. |
| 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 ( Imperial German Navy). Her crew survived. |
| SM U-99 | Imperial German Navy | 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. |
| 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 ( Imperial German Navy) with the loss of a crew member. Two crew were taken as prisoners of war. |

## 8 July

List of shipwrecks: 8 July 1917 :
| Ship | State | Description |
| Asheim | Norway | World War I: The four-masted barque was scuttled in the Atlantic Ocean 20 nautical miles (37 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 ( Imperial German Navy) with the loss of a crew member. |
| Atlantic | Norway | World War I: The barque was sunk in the Atlantic Ocean 20 nautical miles (37 km) south of St. Kilda, United Kingdom by SM U-53 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). |
| 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 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). |
| Manila | United States | World War I: The Schooner was captured and sunk by SMS Seeadler ( Imperial German Navy) in the Pacific Ocean. |
| 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 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy) with the loss of two crew. Her captain was taken as a prisoner of war. |
| Pegu | United Kingdom | World War I: The cargo liner was torpedoed and sunk in the Atlantic Ocean 7 nautical miles (13 km)) south east 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 ( Imperial German Navy) with the loss of a crew member. |
| 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 ( Imperial German Navy). |
| 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 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). Her crew survived. |
| 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. |

## 9 July

List of shipwrecks: 9 July 1917 :
| Ship | State | Description |
| 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 ( Imperial German Navy). |
| 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 ( Imperial German Navy) with the loss of a crew member. |
| Nyora | Australia | The steamship foundered in a storm 50 miles (80 km) west of Kingston, South Australia just after passing Kangaroo Island while towing the schooner Astoria. 14 people onboard Nyora were lost, with 2 survivors. The vessel's wreck was found on 18 June 2019 off Café Jaffa, South Australia. |
| 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 ( Imperial German Navy) with the loss of two crew. |
| 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

List of shipwrecks: 10 July 1917 :
| Ship | State | Description |
| 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 ( Imperial German Navy). Her crew survived. |
| 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. |
| 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 ( Imperial German Navy) with the loss of twenty crew. |
| 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 ( Imperial German Navy). Her crew survived. |
| Jupiter | France | World War I: The trawler struck a mine and sank in the English Channel with the loss of eleven of her crew. |
| 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, or six wounded. Refloated in 1928 and scrapped. |
| 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 ( Imperial German Navy) with the loss of two crew. |
| Mabel | United Kingdom | World War I: The trawler was scuttled in the Atlantic Ocean off Suðuroy by SM U-53 ( Imperial German Navy). Her crew survived. |
| Pacific | United Kingdom | World War I: The trawler was scuttled in the Atlantic Ocean off Suðuroy by SM U-53 ( Imperial German Navy). Her crew survived. |
| Peridot | United Kingdom | World War I: The trawler was scuttled in the Atlantic Ocean off Suðuroy by SM U-53 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). Her crew survived. |
| Romantic | United Kingdom | World War I: The trawler was scuttled in the Atlantic Ocean off Suðuroy by SM U-53 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy) with the loss of nineteen lives. |
| Stoic | United Kingdom | World War I: The trawler was scuttled in the Atlantic Ocean off Suðuroy by SM U-53 ( Imperial German Navy). Her crew survived. |
| HMT Vale of Leven | Royal Navy | The naval trawler was lost on this date. |
| Yâdigâr-ı-Millet (aka Jadhigar-i-Millet) | Ottoman Navy | World War I: The S165-class destroyer was bombed and sunk at İstinye, Turkey 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 aircraft with the loss of 26 of her crew. She was refloated on 24 October 1917. |

## 11 July

List of shipwrecks: 11 July 1917 :
| Ship | State | Description |
| 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 ( Imperial German Navy) with the loss of four of her crew. |
| Beluga | United States | World War I: The steam schooner whaler was scuttled by shelling after being captured on 9 July off Lord Howe Island in the Pacific Ocean by SMS Wolf ( Imperial German Navy). |
| 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 ( Imperial German Navy). Her crew survived. |
| Croxteth Hall | United Kingdom | World War I: The steamer struck a mine and sank 25 miles (40 km) west of Bombay, India. |
| 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 ( Imperial German Navy). Her crew survived. |
| Siracusa | Italy | World War I: The cargo ship struck a mine and sank in the Mediterranean Sea. |
| SM U-69 | Imperial German Navy | 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 torpedoed and sunk in the North Sea with the loss of one crew whilst in convoy from Lerwick, at (60°15′N 1°20′E﻿ / ﻿60.250°N 1.333°E﻿ / 60.250; 1.333) by SM U-52 ( Imperial German Navy). |
| 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 ( Imperial German Navy). Her crew survived. |

## 12 July

List of shipwrecks: 12 July 1917 :
| Ship | State | Description |
| 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 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy) with the loss of all 27 crew. |
| 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 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy) with the loss of 26 crew. |
| 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 ( Imperial German Navy). |
| Fredrika | Sweden | World War I: The cargo ship was torpedoed and damaged in the North Sea whilst in convoy 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 ( Imperial German Navy). She was subsequently taken in tow but foundered 9 nautical miles (17 km) east of Auskerry. |
| 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. |
| 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 ( Imperial German Navy) with the loss of three of her crew. |
| 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 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). |
| Maija | Russia | World War I: The schooner was sunk in the Atlantic Ocean off the coast of Portugal by SM UC-54 ( Imperial German Navy). |
| 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 ( Imperial German Navy) 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 nautical miles (9.3 km) north of Denia, Spain by SM U-34 ( Imperial German Navy). All six crew survived. |

## 13 July

List of shipwrecks: 13 July 1917 :
| Ship | State | Description |
| 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 ( Imperial German Navy). |
| 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 ( Imperial German Navy). |
| 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 ( Imperial German Navy). |
| 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 ( Imperial German Navy) with the loss of two of her crew. |
| 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 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). |

## 14 July

List of shipwrecks: 14 July 1917 :
| Ship | State | Description |
| Bonus | Finland | World War I: The vessel was sunk in the Baltic Sea off Mäntyluoto by SM UC-58 ( Imperial German Navy). |
| 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 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). Her crew survived; they were rescued by HMS G12 ( Royal Navy). |
| 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 ( Imperial German Navy) with the loss of six crew. |

## 15 July

List of shipwrecks: 15 July 1917 :
| Ship | State | Description |
| Atalante | France | World War I: The barque was sunk in the Mediterranean Sea south east of the Balearic Islands, Spain by SM U-38 ( Imperial German Navy). |
| 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, Sussex by SM UB-40 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). Her crew survived. |
| Ebenezer | United Kingdom | World War I: The brig was scuttled in the English Channel 25 nautical miles (46 km) north west of Dieppe, Seine-Inférieure, France by SM UB-40 ( Imperial German Navy). Her crew survived. |
| Encore | United States | World War I: The barque was captured and burned in the Coral Sea by SMS Wolf ( Imperial German Navy). |
| Margaretha Blumenthal | Germany | Margaretha Blumenthal The cargo ship was driven ashore at Zandvoort, North Holland, Netherlands. |
| 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 ( Imperial German Navy) with the loss of 28 crew. |
| HMS Redbreast | Royal Navy | World War I: The fleet messenger was sunk in the Aegean Sea by SM UC-38 ( Imperial German Navy) with the loss of 44 lives. One of the survivors was taken as a prisoner of war. |
| 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 ( Imperial German Navy) with the loss of a crew member. |
| 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 ( Imperial German Navy). Her crew survived, but three of them were taken as prisoners of war. |

## 16 July

List of shipwrecks: 16 July 1917 :
| Ship | State | Description |
| 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 ( Imperial German Navy) with the loss of a crew member. |
| 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 ( Imperial German Navy). |
| 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 Pappas, Greece (37°42′N 25°47′E﻿ / ﻿37.700°N 25.783°E﻿ / 37.700; 25.783) by SM UC-38 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy) with the loss of 24 of her crew. |
| 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 ( Imperial German Navy). Her crew survived. |
| 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 Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). |
| 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 ( Imperial German Navy) with the loss of 25 crew. |
| 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 ( Imperial German Navy) with the loss of a crew member. |
| 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 ( Imperial German Navy). |
| 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 ( Imperial German Navy) with the loss of three of her crew. |
| Vesta | Denmark | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean north of Scotland by SM U-88 ( Imperial German Navy) with the loss of five of her crew. |

## 17 July

List of shipwrecks: 17 July 1917 :
| Ship | State | Description |
| 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 ( Imperial German Navy) 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-Inférieure with the loss of seven of her crew. |
| 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 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy) with the loss of 44 of her crew. Three of the survivors were taken as prisoners of war. |
| 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 ( Imperial German Navy). She was beached but was refloated on 19 July. Subsequently repaired and returned to service. |

## 18 July

List of shipwrecks: 18 July 1917 :
| Ship | State | Description |
| HMT Betsy Sim | Royal Navy | The naval trawler was lost on this date. |
| 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 ( Imperial German Navy). Her crew survived. |

## 19 July

List of shipwrecks: 19 July 1917 :
| Ship | State | Description |
| 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 ( Imperial German Navy). Her crew survived. |
| 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. |
| 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 ( Imperial German Navy) with the loss of over 156 lives. |
| 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 ( Imperial German Navy). Her crew survived and were rescued by HMS Arab ( Royal Navy). |
| Varvara | Greece | World War I: The cargo ship was shelled and sunk in the Mediterranean Sea off Cape Spartivento, Calabria by SM U-32 ( Imperial German Navy). |

## 20 July

List of shipwrecks: 20 July 1917 :
| Ship | State | Description |
| 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 ( Imperial German Navy) with the loss of eleven of her crew. |
| 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. |
| 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 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). |
| 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 ( Imperial German Navy) with the loss of two of her crew. |
| 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 ( Imperial German Navy). Her crew survived. |
| 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. |
| HMT Robert Smith | Royal Navy | The naval trawler was lost in the Atlantic Ocean on this date. |
| RMS 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 ( Imperial German Navy) with the loss of fifteen lives. |

## 21 July

List of shipwrecks: 21 July 1917 :
| Ship | State | Description |
| 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 ( Imperial German Navy). Her crew survived. |
| Augustus Welt | United States | World War I: The four-masted schooner was captured and scuttled in the Atlantic Ocean 130 nautical miles (240 km) south west of Ouessant, Finistère, France by SM UC-17 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). Her crew survived, but one of them was taken as a prisoner of war. |
| 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 ( Imperial German Navy) with the loss of two crew. |
| 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 ( Imperial German Navy). |
| 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 ( Imperial German Navy) with the loss of thirteen crew. |
| John Twohy | United States | World War I: The four-masted schooner was captured and scuttled in the Atlantic Ocean 120 nautical miles (220 km) south of the Azores by SM U-155 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy) with the loss of 29 lives. |
| 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 ( Imperial German Navy). Her crew survived, but her captain was taken as a prisoner of war. |
| HMT Robert Smith | Royal Navy | World War I: The naval trawler was shelled and sunk in the Atlantic Ocean by SM U-44 ( Imperial German Navy) 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. |
| 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. |
| 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 ( Imperial German Navy). Her crew survived. |

## 22 July

List of shipwrecks: 22 July 1917 :
| Ship | State | Description |
| 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 ( Imperial German Navy). She was then shelled and sunk 8 nautical miles (15 km) south west of the Noord Hinder Lightship by SM UB-18 ( Imperial German Navy). |
| 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. |
| 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 ( Imperial German Navy) with the loss of a crew member. |
| 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 ( Imperial German Navy). |
| HMT Orphesia | Royal Navy | The naval trawler struck a submerged wreck and sank in the Mediterranean Sea off Alexandria, Egypt. |
| 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 ( Imperial German Navy) with the loss of five of her crew. |

## 23 July

List of shipwrecks: 23 July 1917 :
| Ship | State | Description |
| 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 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). Her crew survived. |
| HMML 474 | Royal Navy | The motor launch was lost in the Mediterranean Sea on this date. |
| 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 the submarine SM UC-49 ( Imperial German Navy) with the loss of ten of her crew. |
| Vanland | Sweden | World War I: The cargo ship was damaged by shelling in the North Sea off Whitby, Yorkshire, United Kingdom by SM UB-21 ( Imperial German Navy). She was beached, but attacked again from the u-boat, this time with a torpedo. Broke in half and was a total loss. |

## 24 July

List of shipwrecks: 24 July 1917 :
| Ship | State | Description |
| 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 ( Imperial German Navy) with the loss of five of her crew. |
| 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 ( Imperial German Navy) with the loss of two 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). |
| 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 ( Imperial German Navy). |
| 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 ( Imperial German Navy). |
| 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 ( Imperial German Navy). All on board survived. |
| 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 ( Imperial German Navy). Her crew survived. |
| Viking | Sweden | World War I: The cargo ship was torpedoed and sunk with the loss of one life in the North Sea 15 nautical miles (28 km) off Sognefjord, Norway by SM U-67 ( Imperial German Navy). |
| Zateja | Russia | World War I: The sailing vessel was sunk in the Atlantic Ocean west of the Hebrides, Scotland by SM U-45 ( Imperial German Navy). |
| 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 ( Imperial German Navy with the loss of three crew. |

## 25 July

List of shipwrecks: 25 July 1917 :
| Ship | State | Description |
| 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 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). She was later salvaged, repaired and returned to service. |
| 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 ( Imperial German Navy) with the loss of a crew member. |
| RFA Oakleaf | Royal Navy | 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 ( Imperial German Navy). Her crew survived. |
| Otowa | Imperial Japanese Navy | The Otowa-class protected cruiser ran aground off Daiō, Mie (34°14′N 136°35′E﻿ / ﻿34.233°N 136.583°E﻿ / 34.233; 136.583). She sank on 10 August. |
| 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 ( Imperial German Navy) with the loss of a crew member. |
| 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 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). 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 SM UB-18 ( Imperial German Navy). |
| 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 ( Imperial German Navy). Her crew survived. |

## 26 July

List of shipwrecks: 26 July 1917 :
| Ship | State | Description |
| HMS Ariadne | Royal Navy | World War I: The Diadem-class cruiser was torpedoed and sunk in the English Channel off Beachy Head, Sussex by SM UC-65 ( Imperial German Navy) 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°20′N 8°58′W﻿ / ﻿41.333°N 8.967°W﻿ / 41.333; -8.967) by SM UC-69 ( Imperial German Navy). |
| 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 ( Imperial German Navy). |
| 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 ( Imperial German Navy). 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. |
| Gesu E Maria | Italy | World War I: The sailing vessel was sunk in the Mediterranean sea north of Cape Corse by SM U-33 ( Imperial German Navy). |
| 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 ( Imperial German Navy). Her crew survived. |
| 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. |
| 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 ( Imperial German Navy) with the loss of two lives. |
| 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. |
| 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 ( Imperial German Navy). Her crew survived. |
| SM UB-23 | Imperial German Navy | 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. |
| SM UC-61 | Imperial German Navy | SM UC-61, December 2018World War I: The Type UC II submarine ran aground at Wissant, 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 ( Imperial German Navy). |

## 27 July

List of shipwrecks: 27 July 1917 :
| Ship | State | Description |
| 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 ( Imperial German Navy) with the loss of two crew. |
| 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 ( Imperial German Navy). She was beached but was later refloated. |
| 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 ( Imperial German Navy). Her crew survived. |
| 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 Lightship ( United Kingdom) (50°32′N 0°26′W﻿ / ﻿50.533°N 0.433°W﻿ / 50.533; -0.433) by SM UC-65 ( Imperial German Navy) with the loss of a crew member. |
| 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 ( Imperial German Navy). Her crew of 20 survived and were picked up by HMS Attack on the same day . |
| 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 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). Her crew survived. |
| Frigido | Italy | World War I: The sailing vessel was sunk in the Gulf of Genoa by SM U-33 ( Imperial German Navy). |
| 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 ( Imperial German Navy). |
| 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 ( Imperial German Navy). Her crew survived. |
| John Hays Hammond | United States | World War I: The schooner was captured and scuttled 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 ( Imperial German Navy). Her crew survived. |
| Kotohira Maru | Japan | During a voyage from Japan to San Francisco, California, with a cargo of general merchandise, the 3,478-ton steamer was wrecked on the southeastern end of Amchitka Island in the Aleutian Islands. Her entire crew of 49 survived, abandoning ship in three lifeboats, one of which reached Unalaska on Unalaska Island in the Aleutian Islands. Another lifeboat reached Vancouver Island in British Columbia and the third was picked up at sea by the vessel Santa Ana ( United States). |
| 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 ( Imperial German Navy). 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 SM UC-16 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). Her crew survived. |

## 28 July

List of shipwrecks: 28 July 1917 :
| Ship | State | Description |
| 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 ( Imperial German Navy) with the loss of all hands. |
| Flora | United States | The barge sank in Gas House Channel, Lynn, Massachusetts. |
| 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 ( Imperial German Navy) with the loss of a crew member. |
| 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 ( Imperial German Navy). Her crew survived. |
| John Glen | United States | The tug sank in the Housatonic River at Derby, Connecticut. |
| Neptunus I | Netherlands | World War I: The trawler was shelled and sunk in the North Sea off IJmuiden, North Holland by SM UC-16 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). |
| SM UB-20 | Imperial German Navy | 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. |

## 29 July

List of shipwrecks: 29 July 1917 :
| Ship | State | Description |
| 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 ( Imperial German Navy) with the loss of a crew member. |
| Anitra | Norway | World War I: The barque was sunk in the North Sea 20 nautical miles (37 km) off Hvidingsö by SM U-96 ( Imperial German Navy). Her crew survived. |
| Bestwood | United Kingdom | The collier collided with Leander ( United Kingdom) and sank in the Irish Sea off the South Bishop Lighthouse. |
| 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 ( Imperial German Navy). Her crew survived. |
| Gyldenpris | Norway | World War I: The cargo ship was sunk in the Atlantic Ocean off A Coruña, Spain by SM UC-69 ( Imperial German Navy). |
| Ingeborg | Denmark | World War I: The cargo ship was torpedoed 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 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy) with the loss of a crew member. |
| 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. |
| 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 ( Imperial German Navy). Her crew survived. |
| SM UB-27 | Imperial German Navy | 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 ( Imperial German Navy) with the loss of a crew member. |

## 30 July

List of shipwrecks: 30 July 1917 :
| Ship | State | Description |
| 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 ( Imperial German Navy). Her crew survived. |
| Canis | Norway | World War I: The coaster was torpedoed and sunk in the North Sea 20 nautical miles (37 km) west of Holmengraå, Vestland off Bergen by SM U-60 ( Imperial German Navy) with the loss of two crew. |
| 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 ( Imperial German Navy). |
| 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 ( Imperial German Navy). |
| Ganges | United Kingdom | 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 ( Imperial German Navy) with the loss of a crew member. |
| Hansa | Germany | The cargo ship collided with a trawler and sank in the Baltic Sea off Landsort, Sweden. |
| 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 ( Imperial German Navy). |
| 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 ( Imperial German Navy). Her crew survived. |
| USAT Saratoga | United States Army | The troop ship was rammed at anchor by Panama (flag unknown) off Tompkinsville, New York and was filling rapidly when towed to a mudbank and beached. Later raised, repaired and put in service as USS Mercy ( United States Navy). No casualties or one killed. |
| 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 ( Imperial German Navy). |

## 31 July

List of shipwrecks: 31 July 1917 :
| Ship | State | Description |
| 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 ( Imperial German Navy) with the loss of all 23 crew. |
| 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 ( Imperial German Navy). She was scuttled the next day with the loss of 39 crew. |
| 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 ( Imperial German Navy). Her crew survived. |
| Charlotte W. Miller | United States | The schooner sank after a collision with the submarine USS D-2 ( United States Navy) near Bartletts Reef near New London, Connecticut. She was towed to the vicinity of Sarahs Ledge in Long Island Sound by USS Ontario ( United States Navy) where she sank again on 1 August. Raised and towed to New London, Connecticut, declared a total loss. |
| USS Chingachgook | United States Navy | The patrol vessel was damaged beyond repair by the explosion of her gasoline tank at New York. |
| Del Norte | United States | The cargo ship ran aground at Point Arena, California and was a total loss. |
| 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 ( Imperial German Navy) with the loss of five of her crew. |
| 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 ( Imperial German Navy) 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 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 ( Imperial German Navy) with the loss of eleven of her crew. Survivors were rescued by Santa Cecilia ( United States). |
| 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 ( Imperial German Navy) with the loss of 24 of her crew. |
| 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 ( Imperial German Navy) with the loss of a crew member. |
| 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 ( Imperial German Navy) with the loss of a crew member. |
| Regina | Greece | World War I: The sailing vessel was sunk in the Mediterranean Sea by SM UC-22 ( Imperial German Navy). |
| 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 ( Imperial German Navy) with the loss of seventeen crew. |
| 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 ( Imperial German Navy). Her crew survived. |
| 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 ( Imperial German Navy). Her crew survived. |

## Unknown date

List of shipwrecks: Unknown date 1917 :
| Ship | State | Description |
| SM UC-1 | Imperial German Navy | 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. |