# List of shipwrecks in April 1917

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

## 1 April

List of shipwrecks: 1 April 1917 :
| Ship | State | Description |
| Aztec | United States | World War I: The cargo ship was sunk in the Atlantic Ocean off Ouessant, Finistère, France (48°20′N 6°00′W﻿ / ﻿48.333°N 6.000°W﻿ / 48.333; -6.000) by SM U-46 ( Imperial German Navy) with the loss of 27 crew, and one gunner missing. One lifeboat was smashed against her hull during launch, and another was lost after launch. |
| Bergenhus | Denmark | World War I: The passenger ship was sunk in the North Sea 130 nautical miles (240 km) east of the Farne Islands, Northumberland, United Kingdom by SM UC-40 ( Imperial German Navy). There were no casualties. |
| Camilla | Norway | World War I: The cargo ship was sunk in the North Sea 150 nautical miles (280 km) west of Skudesnes, Rogaland (56°32′N 3°59′E﻿ / ﻿56.533°N 3.983°E﻿ / 56.533; 3.983) by SM UB-35 ( Imperial German Navy) with the loss of eight of her crew. |
| Consul Persson | Norway | World War I: The cargo ship was sunk in the North Sea (58°21′N 2°55′E﻿ / ﻿58.350°N 2.917°E﻿ / 58.350; 2.917) by SM U-54 ( Imperial German Navy). Her crew survived. |
| Eastern Belle | United Kingdom | World War I: The ketch was scuttled in the English Channel 30 nautical miles (56 km) southwest of St. Catherine's Point, Isle of Wight by SM UC-72 ( Imperial German Navy). Her crew survived. |
| Endymion | United Kingdom | World War I: The ketch was shelled and sunk in the English Channel off Start Point, Devon by SM UB-32 ( Imperial German Navy) with the loss of four crew. |
| Ester | Denmark | World War I: The cargo ship was sunk in the North Sea (56°32′N 4°18′E﻿ / ﻿56.533°N 4.300°E﻿ / 56.533; 4.300) by SM UB-35 ( Imperial German Navy). Her crew survived. |
| Fjelland | Norway | World War I: The coaster was sunk in the North Sea 50 nautical miles (93 km) south west by west of Utsire, Rogaland (58°20′N 5°50′E﻿ / ﻿58.333°N 5.833°E﻿ / 58.333; 5.833) by SM U-54 ( Imperial German Navy) with the loss of a crew member. |
| Jolie Brise | France | World War I: The fishing vessel was sunk in the Atlantic Ocean 20 nautical miles (37 km) off Audierne, Finistère by SM UB-36 ( Imperial German Navy). |
| Kasenga | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 2 nautical miles (3.7 km) off Cape Palos, Spain by an enemy submarine. |
| Maria Santissima D. Grazie | Italy | World War I: The sailing vessel was sunk in the Mediterranean Sea off Sicily by SM U-65 ( Imperial German Navy). |
| Maria T. | Italy | World War I: The sailing vessel was sunk in the Mediterranean Sea off Sicily by SM U-65 ( Imperial German Navy). |
| Providence de Dieu | France | World War I: The fishing vessel was sunk in the Atlantic Ocean 20 nautical miles (37 km) off Audierne by SM UB-36 ( Imperial German Navy). |
| Silvia | United Kingdom | World War I: The schooner was scuttled in the English Channel 15 nautical miles (28 km) south south east of the Owers Lightship ( United Kingdom) (50°19′N 0°28′W﻿ / ﻿50.317°N 0.467°W﻿ / 50.317; -0.467) by SM UB-39 ( Imperial German Navy). Her crew survived. |
| Warren | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Tyrrhenian Sea 20 nautical miles (37 km) south west of Civitavecchia, Lazio, Italy (41°51′N 11°22′E﻿ / ﻿41.850°N 11.367°E﻿ / 41.850; 11.367) by SM UC-38 ( Imperial German Navy) with the loss of three of her crew. Her captain was taken as a prisoner of war. |
| Zambesi | United Kingdom | World War I: The collier was torpedoed and sunk in the Mediterranean Sea 15 nautical miles (28 km) north by west of Alexandria, Egypt (31°26′N 29°49′E﻿ / ﻿31.433°N 29.817°E﻿ / 31.433; 29.817) by SM U-63 ( Imperial German Navy) with the loss of three crew. |

## 2 April

List of shipwrecks: 2 April 1917 :
| Ship | State | Description |
| Britannia | United Kingdom | World War I: The cargo ship torpedoed and was sunk in the Mediterranean Sea 22 nautical miles (41 km) west north west of Pantelleria, Italy (36°35′N 11°28′E﻿ / ﻿36.583°N 11.467°E﻿ / 36.583; 11.467) by SM U-65 ( Imperial German Navy). Her crew survived, but two of them were taken as prisoners of war. |
| HMT Commandant | Royal Navy | World War I: The naval trawler struck a mine placed by SM UC-7 ( Imperial German Navy) and sank in the North Sea off the Sunk Lightship ( United Kingdom) (51°33′N 1°36′E﻿ / ﻿51.550°N 1.600°E﻿ / 51.550; 1.600) with the loss of five of her crew. |
| Filicudi | Regia Marina | World War I: The naval tug struck a mine placed by SM UC-38 ( Imperial German Navy) and sank in the Mediterranean Sea off Trapani, Sicily. |
| Havlyst | Norway | World War I: The coaster was sunk in the North Sea off Lindesnes, Vest-Agder (57°30′N 6°50′E﻿ / ﻿57.500°N 6.833°E﻿ / 57.500; 6.833) by SM U-54 ( Imperial German Navy). Her crew survived. |
| Anna Fostenes | Norway | World War I: The cargo ship was sunk, probably by a floating mine, 90 miles (140 km) north of Terschelling, with the loss of eight crewman. |
| Lord Scarborough | United Kingdom | World War I: The trawler was sunk in the North Sea 100 nautical miles (190 km) east of the Isle of May, Fife by SM UB-35 ( Imperial German Navy). Her crew survived. |
| Sagitta | Norway | World War I: The barque was sunk in the North Sea (60°00′N 2°00′W﻿ / ﻿60.000°N 2.000°W﻿ / 60.000; -2.000) by SM U-78 ( Imperial German Navy). Her crew survived. |
| Snespurven | Norway | World War I: The barque was shelled and sunk in the Atlantic Ocean 25 nautical miles (46 km) south south west of the Tuskar Rock, Ireland (50°55′N 7°03′W﻿ / ﻿50.917°N 7.050°W﻿ / 50.917; -7.050) by SM U-59 ( Imperial German Navy). Her crew survived. |
| Zealandia | United States | The ship ran aground off Southport, Lancashire, United Kingdom. |

## 3 April

List of shipwrecks: 3 April 1917 :
| Ship | State | Description |
| Annunziata A. | Italy | World War I: The brigantine was scuttled in the Mediterranean Sea east of Sardinia (39°52′N 10°04′E﻿ / ﻿39.867°N 10.067°E﻿ / 39.867; 10.067) by SM UC-38 ( Imperial German Navy). |
| Ardgask | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 15 nautical miles (28 km) south west of Cape Rosello, Sicily by SM U-35 ( Imperial German Navy) with the loss of a crew member. |
| Caterina R. | Italy | World War I: The barquentine was scuttled in the Mediterranean Sea east of Sicily (39°27′N 9°46′E﻿ / ﻿39.450°N 9.767°E﻿ / 39.450; 9.767) by SM UC-38 ( Imperial German Navy). |
| Domenico | Italy | World War I: The sailing vessel was scuttled in the Mediterranean Sea east of Sardinia (39°24′N 9°55′E﻿ / ﻿39.400°N 9.917°E﻿ / 39.400; 9.917) by SM UC-38 ( Imperial German Navy). |
| Ellen James | United Kingdom | World War I: The schooner was shelled and sunk in the Atlantic Ocean west of Ouessant, Finistère, France by SM UC-71 ( Imperial German Navy) with the loss of five of her crew. |
| Ernest Simons | France | World War I: The passenger ship was sunk in the Mediterranean Sea north east of Cap Sera, Algeria (37°08′N 8°28′E﻿ / ﻿37.133°N 8.467°E﻿ / 37.133; 8.467) by SM UC-37 ( Imperial German Navy). Her crew survived. |
| Hesperus | Russia | World War I: The cargo ship was sunk in the Atlantic Ocean 72 nautical miles (133 km) off the Bishop Rock, Isles of Scilly, United Kingdom (48°50′N 7°20′W﻿ / ﻿48.833°N 7.333°W﻿ / 48.833; -7.333) by SM U-46 ( Imperial German Navy). Her crew survived. |
| Maria Ferrara | Italy | World War I: The sailing vessel was sunk in the Mediterranean Sea west of Sicily by SM U-65 ( Imperial German Navy). |
| Nuova Maria di Porto Salvo | Italy | World War I: The sailing vessel was sunk in the Mediterranean Sea east of Sicily by SM UC-38 ( Imperial German Navy). |
| Saint Simon | France | World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 20 nautical miles (37 km) north west of La Galite, Tunisia (37°36′N 8°38′E﻿ / ﻿37.600°N 8.633°E﻿ / 37.600; 8.633) by SM UC-37 ( Imperial German Navy). |
| Vasilefs Constantinos | Greece | World War I: The cargo ship was sunk in the Aegean Sea 45 nautical miles (83 km) south west of Akra Akritas by SM UB-43 ( Imperial German Navy). |

## 4 April

List of shipwrecks: 4 April 1917 :
| Ship | State | Description |
| City of Paris | United Kingdom | World War I: The passenger ship was torpedoed and sunk in the Mediterranean Sea 46 nautical miles (85 km) south by east of Cap d'Antibes, Alpes-Maritimes, France (42°54′N 7°38′E﻿ / ﻿42.900°N 7.633°E﻿ / 42.900; 7.633) by SM UC-35 ( Imperial German Navy) with the loss of 122 lives. |
| Domingo | Italy | World War I: The cargo ship was sunk in the Atlantic Ocean off Queenstown, County Cork, United Kingdom by SM U-60 ( Imperial German Navy). |
| Gibraltar | United Kingdom | World War I: The trawler was scuttled in the North Sea 20 nautical miles (37 km) east north east of Rattray Head, Aberdeenshire by SM UB-35 ( Imperial German Navy). Her crew survived. |
| Hundvaagø | Norway | World War I: The cargo ship was torpedoed and damaged in the Atlantic Ocean south west of Ireland. She was beached at Castletownbere, County Cork. Subsequently repaired and returned to service. |
| Hunstanton | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 36 nautical miles (67 km) west of the Isles of Scilly (49°50′N 7°40′W﻿ / ﻿49.833°N 7.667°W﻿ / 49.833; -7.667) by SM UC-30 ( Imperial German Navy). Her crew survived. |
| Maggie Ross | United Kingdom | World War I: The trawler was shelled and sunk in the North Sea 60 nautical miles (110 km) north east of Girdle Ness, Aberdeenshire by SM UB-35 ( Imperial German Navy). Her crew survived. |
| Margit | United Kingdom | World War I: The collier was torpedoed and sunk in the Mediterranean Sea 80 nautical miles (150 km) south west of Cape Matapan, Greece (35°28′N 21°24′E﻿ / ﻿35.467°N 21.400°E﻿ / 35.467; 21.400) by SM U-63 ( Imperial German Navy). Her crew survived. |
| Marguerite | United States | World War I: The four-masted schooner was captured and damaged in attempting to scuttle her with a torpedo or by scuttling charges in the Mediterranean Sea 35 nautical miles (65 km) south west of Sardinia by SM U-35 ( Imperial German Navy). She sank the next day. Her crew was rescued by a French torpedo boat 46 hours later. |
| Missourian | United States | World War I: The cargo ship was shelled and sunk in the Tyrrhenian Sea off Porto Maurizio, Liguria, Italy by SM U-52 ( Imperial German Navy). Her crew survived. |
| Monte Protedigo | Argentina | World War I: The barquentine was sunk in the Atlantic Ocean off the Isles of Scilly (49°27′N 6°44′W﻿ / ﻿49.450°N 6.733°W﻿ / 49.450; -6.733) by SM UC-30 ( Imperial German Navy). |
| Parana | Brazil | World War I: The cargo ship was sunk in the English Channel off Barfleur, Manche, France by SM UB-32 ( Imperial German Navy). Her crew survived. |
| Parkgate | United Kingdom | World War I: The cargo ship was scuttled in the Mediterranean Sea 80 nautical miles (150 km) north east of the Cap de Fer, Algeria (38°12′N 8°10′E﻿ / ﻿38.200°N 8.167°E﻿ / 38.200; 8.167) by SM U-35 ( Imperial German Navy) with the loss of sixteen crew. Her captain was taken as a prisoner of war. |
| Penseiro | Italy | World War I: The cargo ship was scuttled in the Atlantic Ocean 40 nautical miles (74 km) west of the Isles of Scilly by SM UC-71 ( Imperial German Navy). Her crew survived. |
| Ravenna | Italy | World War I: The passenger ship was sunk in the Tyrrhenian Sea 2 nautical miles (3.7 km) off Cape Mele, Liguria (44°00′N 8°28′E﻿ / ﻿44.000°N 8.467°E﻿ / 44.000; 8.467) by SM U-52 ( Imperial German Navy). |
| San Giovanni Battiste | Italy | World War I: The sailing vessel was sunk in the Mediterranean Sea by SM UC-37 ( Imperial German Navy). |
| Trevier | Belgium | World War I: The cargo ship was torpedoed, shelled and sunk in the North Sea off Scheveningen, South Holland, Netherlands (52°15′N 3°49′E﻿ / ﻿52.250°N 3.817°E﻿ / 52.250; 3.817﻿ (SS Trevier)) by SM UB-23 ( Imperial German Navy). |
| Vladimir Reitz | Denmark | World War I: The cargo ship was sunk in the Atlantic Ocean 40 nautical miles (74 km) north west by north of Foula, Shetland Islands, United Kingdom by SM U-78 ( Imperial German Navy) with the loss of two crew. |

## 5 April

List of shipwrecks: 5 April 1917 :
| Ship | State | Description |
| Amiral L'Hermite | France | World War I: The schooner was scuttled in the Atlantic Ocean 60 nautical miles (110 km) west north west of the Blasket Islands, County Kerry, United Kingdom by SM U-59 ( Imperial German Navy). |
| Angel Marina | Italy | World War I: The sailing vessel was scuttled in the Ligurian Sea (43°16′N 7°10′E﻿ / ﻿43.267°N 7.167°E﻿ / 43.267; 7.167) by SM U-52 ( Imperial German Navy). |
| Benheather | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 110 nautical miles (200 km) west north west of the Fastnet Rock (51°20′N 12°30′W﻿ / ﻿51.333°N 12.500°W﻿ / 51.333; -12.500) by SM U-46 ( Imperial German Navy). Her crew survived. |
| Bris | Denmark | World War I: The schooner was sunk in the Atlantic Ocean 20 nautical miles (37 km) north of the Butt of Lewis, Outer Hebrides, United Kingdom by SM U-78 ( Imperial German Navy) with the loss of two of her crew. |
| Calliope | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Tyrrhenian Sea 35 nautical miles (65 km) south west of Ustica, Italy (38°22′N 11°25′E﻿ / ﻿38.367°N 11.417°E﻿ / 38.367; 11.417) by SM U-65 ( Imperial German Navy) with the loss of six lives. Three survivors were taken as prisoners of war. |
| Canadian | United Kingdom | World War I: The passenger ship was torpedoed and sunk in the Atlantic Ocean 47 nautical miles (87 km) north west of the Fastnet Rock (51°36′N 10°48′W﻿ / ﻿51.600°N 10.800°W﻿ / 51.600; -10.800) by SM U-59 ( Imperial German Navy) with the loss of a crew member. |
| Dicto | Norway | World War I: The cargo ship was sunk in the Atlantic Ocean south east of the Armen Rock by SM UB-39 ( Imperial German Navy) with the loss of a crew member. |
| Dunkerquois | France | World War I: The schooner was sunk in the Atlantic Ocean 45 nautical miles (83 km) off the Blasket Islands by SM U-86 ( Imperial German Navy). |
| Ebenezer | Denmark | World War I: The three-masted schooner was shelled and sunk in the Atlantic Ocean 10 nautical miles (19 km) south west of St. Kilda, United Kingdom (57°58′N 8°20′W﻿ / ﻿57.967°N 8.333°W﻿ / 57.967; -8.333) by SM U-57 ( Imperial German Navy). Her crew survived. |
| Ernest Legouve | France | World War I: The barque was torpedoed and sunk in the English Channel 5 nautical miles (9.3 km) west by south of St. Catherine's Point, Isle of Wight, United Kingdom (50°30′N 1°26′W﻿ / ﻿50.500°N 1.433°W﻿ / 50.500; -1.433) by SM UB-32 ( Imperial German Navy) with the loss of twenty of her 24 crew. |
| Gower Coast | United Kingdom | World War I: The coaster struck a mine placed by SM UC-71 ( Imperial German Navy) and sank in the English Channel off Le Tréport, Seine-Inférieure, France with the loss of all fifteen crew. |
| Marie Celine | France | World War I: The schooner was sunk in the Atlantic Ocean south west of Ireland by SM U-86 ( Imperial German Navy). |
| N. J. Fjord | Denmark | World War I: The cargo ship was scuttled in the North Sea 40 nautical miles (74 km) east north east of Coquet Island, Northumberland, United Kingdom. Her crew survived. |
| Roland | France | World War I: The sailing vessel was sunk in the Atlantic Ocean 80 nautical miles (150 km) west north west of the Blasket Islands by SM U-59 ( Imperial German Navy). |
| San Fulgencio | Spain | World War I: The cargo ship was sunk in the Bay of Biscay off Sables d'Olonne, Vendée, France by SM UC-71 ( Imperial German Navy). |
| Siberier | Belgium | World War I: The cargo ship was torpedoed and damaged in the Atlantic Ocean 40 nautical miles (74 km) west of the Fastnet Rock (52°18′N 11°40′W﻿ / ﻿52.300°N 11.667°W﻿ / 52.300; -11.667﻿ (SS Siberier)) by SM U-86 ( Imperial German Navy). She was taken in tow but sank the next day. |
| Solstad | Norway | World War I: The cargo ship was sunk in the Ionian Sea northwest of Cythera, Greece (36°02′N 20°50′E﻿ / ﻿36.033°N 20.833°E﻿ / 36.033; 20.833) by SM U-63 ( Imperial German Navy). Her crew survived. |
| Vilja | Norway | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 135 nautical miles (250 km) west of the Fastnet Rock (52°12′N 13°07′W﻿ / ﻿52.200°N 13.117°W﻿ / 52.200; -13.117) by SM U-55 ( Imperial German Navy) with the loss of a crew member. |

## 6 April

List of shipwrecks: 6 April 1917 :
| Ship | State | Description |
| Cybele | France | World War I: The sailing vessel was sunk in the Mediterranean Sea of Cabo de Gata, Almeria, Spain by SM UC-25 ( Imperial German Navy). |
| Henry Clay | United States | The schooner barge sank in 15 fathoms (90 ft; 27 m) of water 9 miles (14 km) west south west of the Montauk Point Light after springing a leak in a gale, a total loss. The crew was rescued by her tug Germantown ( United States). |
| John H. Ryerson | United States | The barge went ashore on Kelsey Point near Duck Island, Connecticut. Refloated and returned to service. |
| Kongshaug | Norway | World War I: The coaster was captured and scuttled in the North Sea 45 nautical miles (83 km) north of Kinnaird Head, Aberdeenshire, United Kingdom by SM UB-35 ( Imperial German Navy). Her crew were rescued by a Scottish fishing vessel. |
| La Tour d'Auvergne | France | World War I: The brig was shelled and set on fire in the Atlantic Ocean 15 nautical miles (28 km) south south east of the Longships Lighthouse by SM UB-39 ( Imperial German Navy). She was towed to Mullion, Cornwall, United Kingdom but was declared a constructive total loss. Her crew survived. |
| Lord Kitchener | United Kingdom | World War I: The trawler was scuttled in the North Sea 45 nautical miles (83 km) north by east of Kinnaird Head by SM UB-35 ( Imperial German Navy). Her crew survived. |
| Marion | Norway | World War I: The barque was shelled and sunk in the Atlantic Ocean (52°10′N 13°46′W﻿ / ﻿52.167°N 13.767°W﻿ / 52.167; -13.767) by SM U-60 ( Imperial German Navy) with the loss of a crew member. |
| Narberth Castle | United Kingdom | World War I: The trawler was shelled and sunk in the North Sea 30 nautical miles (56 km) north north west of Dennis Head Old Beacon, North Ronaldsay, Orkney Islands by SM UC-27 ( Imperial German Navy). Her crew survived. |
| Nestor | United Kingdom | World War I: The trawler was shelled and sunk in the North Sea 20 nautical miles (37 km) north west by north of North Ronaldsay by SM UC-27 ( Imperial German Navy). Her crew survived. |
| Perce Neige | France | World War I: The schooner was sunk in the Atlantic Ocean off Lands End, Cornwall, United Kingdom by SM UB-39 ( Imperial German Navy). |
| Powhatan | United Kingdom | World War I: The tanker was torpedoed and sunk in the Atlantic Ocean 25 nautical miles (46 km) north by west of North Rona (59°32′N 6°30′W﻿ / ﻿59.533°N 6.500°W﻿ / 59.533; -6.500) by SM U-66 ( Imperial German Navy) with the loss of 36 crew. Her captain was taken as a prisoner of war. |
| Presto | United Kingdom | World War I: The cargo ship struck a mine placed by SM UC-40 ( Imperial German Navy) and sank in the North Sea 4 nautical miles (7.4 km) east of Roker Point, Sunderland, County Durham (54°57′N 1°16′W﻿ / ﻿54.950°N 1.267°W﻿ / 54.950; -1.267) with the loss of six of her crew. |
| Rahmanich | Egypt | World War I: The ship was sunk in the Mediterranean Sea off the coast of Egypt by SM UC-34 ( Imperial German Navy). |
| Recto | United Kingdom | World War I: The trawler was scuttled in the North Sea 45 nautical miles (83 km) north by east of Kinnaird Head by SM UB-35 ( Imperial German Navy). Her crew survived. |
| Rosalind | United Kingdom | World War I: The tanker was torpedoed and sunk in the Atlantic Ocean 180 nautical miles (330 km) west north west of the Fastnet Rock (51°39′N 14°20′W﻿ / ﻿51.650°N 14.333°W﻿ / 51.650; -14.333) by SM U-86 ( Imperial German Navy) with the loss of two of her crew. |
| Sand Flea | United States | The dredge sank in the harbor at Bridgeport, Connecticut. |
| Spithead | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 12 nautical miles (22 km) north by west of the Damietta Lighthouse, Egypt (31°44′N 31°46′E﻿ / ﻿31.733°N 31.767°E﻿ / 31.733; 31.767) by SM UC-34 ( Imperial German Navy) with the loss of a crew member. |
| HMT Strathrannoch | Royal Navy | World War I: The naval trawler struck a mine placed by SM UC-31 ( Imperial German Navy) and sank in the North Sea off St. Abb's Head, Berwickshire (55°55′N 2°07′W﻿ / ﻿55.917°N 2.117°W﻿ / 55.917; -2.117) with the loss of all thirteen crew. |
| Tell City | United States | The steamer sank after being forced ashore at Little Hocking, Ohio. |
| Thelma | Norway | World War I: The cargo ship struck a mine and sank in the English Channel 4 nautical miles (7.4 km) south by west of the Owers Lightship ( United Kingdom) by SM UC-65 ( Imperial German Navy) with the loss of a crew member. |
| Vine Branch | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean south west of Ireland (49°45′N 14°08′W﻿ / ﻿49.750°N 14.133°W﻿ / 49.750; -14.133) by SM U-55 ( Imperial German Navy) with the loss of all 44 crew. |

## 7 April

List of shipwrecks: 7 April 1917 :
| Ship | State | Description |
| Caminha | Portugal | World War I: The cargo ship was sunk in the Bay of Biscay (45°22′N 2°48′W﻿ / ﻿45.367°N 2.800°W﻿ / 45.367; -2.800﻿ (SS Caminha)) by gunfire from SM UC-71 ( Imperial German Navy). |
| SMS Cormoran | Imperial German Navy | World War I: The merchant raider was scuttled at Guam with the loss of nine crew. |
| Edwin R. Hunt | United States | World War I: The schooner was shelled and sunk in the Mediterranean Sea 40 nautical miles (74 km) off Cabo de Gata, Almeria, Spain by SM UC-25 ( Imperial German Navy). Her crew survived. |
| Emily S. Baymore | United States | The barge went on the rocks at Eastern Point, New London, Connecticut. |
| Fiskaa | Norway | World War I: The barque was sunk in the Atlantic Ocean 10 nautical miles (19 km) off St. Kilda, United Kingdom by SM U-46 ( Imperial German Navy). Her crew survived. |
| HMS Jason | Royal Navy | World War I: The torpedo boat struck a mine placed by SM U-78 ( Imperial German Navy) and sank off Coll, Inner Hebrides (56°35′45″N 6°28′15″W﻿ / ﻿56.59583°N 6.47083°W﻿ / 56.59583; -6.47083) with the loss of 25 crew. |
| SS Maplewood | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 47 nautical miles (87 km) south west of Cape Sperone, Sardinia, Italy by SM U-35 ( Imperial German Navy). Her crew survived. |
| Salmo | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 210 nautical miles (390 km) north west of the Fastnet Rock (52°30′N 14°40′W﻿ / ﻿52.500°N 14.667°W﻿ / 52.500; -14.667) by SM U-60 ( Imperial German Navy) with the loss of two crew. |
| Scow No. 35 | United States | The scow sank in White Head Pass, Portland, Maine. |
| Seward | United States | World War I: The cargo ship was shelled, or torpedoed, and sunk, or captured and scuttled with explosives, depending on source, in the Mediterranean Sea 22 nautical miles (41 km) north east of Begur, Spain (42°42′N 3°41′E﻿ / ﻿42.700°N 3.683°E﻿ / 42.700; 3.683) by SM U-52 ( Imperial German Navy). Her crew survived. |
| Trefusis | United Kingdom | World War I: The collier was scuttled in the Mediterranean Sea 30 nautical miles (56 km) south east of Cape Pula, Sardinia (38°38′N 9°25′E﻿ / ﻿38.633°N 9.417°E﻿ / 38.633; 9.417) by SM U-65 ( Imperial German Navy). Her crew survived, but three survivors were taken as prisoners of war. |

## 8 April

List of shipwrecks: 8 April 1917 :
| Ship | State | Description |
| Alba | Italy | World War I: The cargo ship was sunk in the Mediterranean Sea 3 nautical miles (5.6 km) off Garraf, Spain (41°05′N 1°53′E﻿ / ﻿41.083°N 1.883°E﻿ / 41.083; 1.883) by SM U-52 ( Imperial German Navy). |
| SMS G88 | Imperial German Navy | World War I: The G85-class torpedo boat was torpedoed and sunk in the North Sea by a Royal Navy Coastal Motor Boat. |
| Geilan Bahri | United Kingdom | World War I: The sailing vessel was scuttled in the Mediterranean Sea 54 nautical miles (100 km) off Alexandria, Egypt by SM UC-34 ( Imperial German Navy). |
| Livatho | Greece | World War I: The cargo ship was sunk in the Mediterranean Sea north west of Crete (36°24′N 20°56′E﻿ / ﻿36.400°N 20.933°E﻿ / 36.400; 20.933) by SM UB-47 ( Imperial German Navy). Her crew survived. |
| Lucia | Italy | World War I: The sailing vessel was sunk in the Mediterranean Sea off Cape Pula, Sardinia by SM U-65 ( Imperial German Navy). |
| Nestos | Greece | World War I: The cargo ship was sunk in the Mediterranean Sea 50 nautical miles (93 km) west south west of Sapientza (36°27′N 20°59′E﻿ / ﻿36.450°N 20.983°E﻿ / 36.450; 20.983) by SM UB-47 ( Imperial German Navy). |
| Papa Gian Battista | Italy | World War I: The sailing vessel was sunk in the Mediterranean Sea off Cape Pula, Sardinia by SM U-65 ( Imperial German Navy). |
| Petridge | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 200 nautical miles (370 km) west north west of Ouessant, Finistère, France (48°14′N 10°10′W﻿ / ﻿48.233°N 10.167°W﻿ / 48.233; -10.167) by SM U-55 ( Imperial German Navy). Her crew survived, but two of them were taken as prisoners of war. |
| Torrington | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 150 nautical miles (280 km) south west of the Isles of Scilly by SM U-55 ( Imperial German Navy) with the loss of 34 crew. Her captain was taken as a prisoner of war. |
| Umvoti | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 200 nautical miles (370 km) west north west of Ouessant (48°48′N 10°15′W﻿ / ﻿48.800°N 10.250°W﻿ / 48.800; -10.250) by SM U-55 ( Imperial German Navy) with the loss of four crew. Two survivors were taken as prisoners of war. |

## 9 April

List of shipwrecks: 9 April 1917 :
| Ship | State | Description |
| Avon | United Kingdom | World War I: The passenger ship struck a mine placed by SM UC-7 ( Imperial German Navy) and sank in the Thames Estuary 2.5 nautical miles (4.6 km) south east by south of the Tongue Lightship ( United Kingdom) (51°29′00″N 1°26′30″E﻿ / ﻿51.48333°N 1.44167°E﻿ / 51.48333; 1.44167) with the loss of two lives. |
| Cairnie | United Kingdom | The coaster dragged her anchors, collided with another vessel and sank. Her crew were rescued. |
| Concord | United States | The steamer went ashore on Hog Island, Massachusetts. |
| Esterel | France | World War I: The cargo ship was sunk in the Mediterranean Sea off Port-Vendres, Pyrénées-Orientales (42°39′N 3°30′E﻿ / ﻿42.650°N 3.500°E﻿ / 42.650; 3.500) by SM U-52 ( Imperial German Navy). |
| Fremad I | Norway | World War I: The barque was sunk in the North Sea 200 nautical miles (370 km) off Lindesnes, Vest-Agder (58°47′N 0°52′E﻿ / ﻿58.783°N 0.867°E﻿ / 58.783; 0.867) by SM U-59 ( Imperial German Navy). Her crew survived. |
| Ganslei | Russia | World War I: The cargo ship was sunk in Kola Bay (69°19′N 33°31′E﻿ / ﻿69.317°N 33.517°E﻿ / 69.317; 33.517) by SM U-75 ( Imperial German Navy). |
| Kittiwake | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the North Sea 25 nautical miles (46 km) north west of the Maas Lightship ( Netherlands) (52°15′N 3°18′E﻿ / ﻿52.250°N 3.300°E﻿ / 52.250; 3.300) by SM UB-30 ( Imperial German Navy) with the loss of seven crew. |
| HMT Ortho | Royal Navy | World War I: The naval trawler struck a mine placed by SM UC-14 ( Imperial German Navy) and sank in the North Sea off Lowestoft, Suffolk (52°23′00″N 1°52′30″E﻿ / ﻿52.38333°N 1.87500°E﻿ / 52.38333; 1.87500) with the loss of a crew member. |
| Saint Maudez | France | World War I: The sailing vessel was sunk in the English Channel 10 nautical miles (19 km) north north west of Fécamp, Seine-Inférieure by SM UB-39 ( Imperial German Navy). |
| Themistoclis | Greece | World War I: The cargo ship was sunk in the Atlantic Ocean 100 nautical miles (190 km) off Pointe Saint-Mathieu, Finistère, France by SM UC-71 ( Imperial German Navy). |
| Valhall | Norway | World War I: The cargo ship was sunk in the Atlantic Ocean 30 nautical miles (56 km) north of the Pierres Noires, Finistère by SM UC-71 ( Imperial German Navy). Her crew survived. |

## 10 April

List of shipwrecks: 10 April 1917 :
| Ship | State | Description |
| Abd Razid | Tunisia | World War I: The sailing vessel was sunk in the Mediterranean Sea off Tripoli, Libya by SM UC-20 ( Imperial German Navy). |
| Dalton | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea off Cape Matapan, Greece (36°00′N 22°40′E﻿ / ﻿36.000°N 22.667°E﻿ / 36.000; 22.667) by SM U-28 ( Austro-Hungarian Navy). Her crew survived. |
| HMS P26 | Royal Navy | World War I: The P-class sloop struck a mine placed by SM UC-26 ( Imperial German Navy) and sank in the English Channel off Le Havre, Seine-Inférieure, France with the loss of nineteen of her 59 crew. Survivors were rescued by HMS P19 ( Royal Navy |
| Pluto | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the North Sea 32 nautical miles (59 km) south east by east of Lowestoft, Suffolk (52°19′N 2°34′E﻿ / ﻿52.317°N 2.567°E﻿ / 52.317; 2.567) by SM UB-20 ( Imperial German Navy). Her crew survived. |
| Porto di Rodi | Italy | World War I: The cargo ship was sunk in the Ionian Sea 37°53′N 18°02′E﻿ / ﻿37.883°N 18.033°E﻿ / 37.883; 18.033) SM U-32 ( Imperial German Navy) with the loss of 31 crew. |
| Ranvik | Norway | World War I: The cargo ship was sunk in the Atlantic Ocean 45 nautical miles (83 km) west south west of Ouessant, Finistère, France by SM UC-71 ( Imperial German Navy). Her crew survived. |
| HMHS Salta | Royal Navy | ( Red Cross): World War I: The hospital ship struck a mine and sank at Le Havre with the loss of 130 of the 205 people on board. |

## 11 April

List of shipwrecks: 11 April 1917 :
| Ship | State | Description |
| HMT Amy | Royal Navy | World War I: The naval trawler struck a mine placed by SM UC-26 ( Imperial German Navy) and sank in the English Channel off Le Havre, Seine Maritime, France with the loss of nine of her crew. |
| Ansgar | Denmark | World War I: The barquentine was set afire and sunk in the Mediterranean Sea off Cape San Antonio, Spain (39°06′N 0°30′E﻿ / ﻿39.100°N 0.500°E﻿ / 39.100; 0.500) by SM U-52 ( Imperial German Navy). Her crew survived. |
| Candia | Italy | World War I: The cargo ship was sunk in the Mediterranean Sea off Zuwara, Libya by SM UC-20 ( Imperial German Navy). |
| Cyfarthfa | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 32 nautical miles (59 km) west south west of Antikythera, Greece (35°29′N 22°30′E﻿ / ﻿35.483°N 22.500°E﻿ / 35.483; 22.500) by SM UB-47 ( Imperial German Navy). Her crew survived. |
| Duchess of Cornwall | United Kingdom | World War I: The cargo ship struck a mine placed by SM UC-26 ( Imperial German Navy) and sank in the English Channel 5 nautical miles (9.3 km) north of Cape Barfleur, Manche, France with the loss of 23 of her crew. |
| Imperial Transport | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 140 nautical miles (260 km) north west by north of Alexandria, Egypt by SM UC-34 ( Imperial German Navy). Her crew survived, but her captain was taken as a prisoner of war. |
| Miss Morris | United Kingdom | World War I: The three-masted schooner was scuttled in the Mediterranean Sea 20 nautical miles (37 km) south east of Garrucha, Andalusia, Spain (36°57′N 1°50′W﻿ / ﻿36.950°N 1.833°W﻿ / 36.950; -1.833) by SM U-35 ( Imperial German Navy). Her crew survived. |
| Nancy | Denmark | World War I: The cargo ship was torpedoed and sunk in the North Sea 42 nautical miles (78 km) off the Hellisøy Lighthouse, Hordaland, Norway by SM U-30 ( Imperial German Navy) with the loss of three crew. |
| Precedent | United Kingdom | World War I: The fishing smack was scuttled in the English Channel 12 nautical miles (22 km) east south east of Berry Head, Devon by SM UB-38 ( Imperial German Navy). Her crew survived. |
| Quaggy | United Kingdom | World War I: The coaster struck a mine placed by SM UC-31 ( Imperial German Navy) and sank in the North Sea 3 nautical miles (5.6 km) east of Robin Hood's Bay, Yorkshire with the loss of two of her crew. |
| Sarvsfos | Norway | World War I: The barque was sunk in the North Sea 80 nautical miles (150 km) south east of Kirkwall, Orkney Islands (58°33′N 0°00′E﻿ / ﻿58.550°N 0.000°E﻿ / 58.550; 0.000) by SM U-50 ( Imperial German Navy). Her crew survived. |
| Saxo | Denmark | World War I: The coaster was sunk in the North Sea 42 nautical miles (78 km) off the Hellisøy Lighthouse by SM U-30 ( Imperial German Navy). Her crew survived. |
| Star | Norway | World War I: The coaster was sunk in the North Sea 68 nautical miles (126 km) off the coast of Fife, United Kingdom by SM U-30 ( Imperial German Navy). Her crew survived. |
| Sylfiden | Norway | World War I: The barque was sunk in the North Sea NW. of Bergen 50 nautical miles (93 km) north by west of Holmengråa Island, Vestland by SM U-30 ( Imperial German Navy). Her crew survived. |
| HMS Thrush | Royal Navy | The salvage ship was wrecked off Glenarm, Ireland. |
| Tremorvah | United Kingdom | World War I: The cargo ship was shelled and sunk in the Mediterranean Sea 70 nautical miles (130 km) north north west of Cape Bougaroni, Algeria by SM U-65 ( Imperial German Navy). Her crew survived, but four of them were taken as prisoners of war. |

## 12 April

List of shipwrecks: 12 April 1917 :
| Ship | State | Description |
| Angela M. | Italy | World War I: The three-masted schooner was scuttled in the Mediterranean Sea north west of Cape Bougaroni, Algeria by SM U-65 ( Imperial German Navy). |
| Caliban | United Kingdom | World War I: The trawler was shelled and sunk in the North Sea 45 nautical miles (83 km) north east by east of Rattray Head, Aberdeenshire by SM UC-76 ( Imperial German Navy). Her crew survived. |
| Chinkiang | United Kingdom | World War I: The trawler was shelled and sunk in the North Sea 30 nautical miles (56 km) north east by east of Buchan Ness, Aberdeenshire by SM UC-76 ( Imperial German Navy). Her crew survived. |
| Crown Prince | United Kingdom | World War I: The trawler was shelled and sunk in the North Sea 45 nautical miles (83 km) north east by east of Girdle Ness by SM UC-76 ( Imperial German Navy). Her crew survived. |
| Dina Henderika | Netherlands | World War I: The sailing vessel was scuttled in the North Sea 30 nautical miles (56 km) east north east of Hartlepool, County Durham, United Kingdom by SM UC-31 ( Imperial German Navy). |
| Edelweiss | France | World War I: The sailing vessel was shelled and sunk in the English Channel off Cherbourg, Seine-Inférieure by SM UC-71 ( Imperial German Navy). |
| Equerry | United Kingdom | World War I: The trawler was shelled and sunk in the North Sea 35 nautical miles (65 km) north east of Kincaid Head by SM UC-76 ( Imperial German Navy). Her crew survived. |
| Ernst Sophie | Russia | World War I: The sailing vessel was scuttled in the Atlantic Ocean south west of Ireland (51°05′N 11°58′W﻿ / ﻿51.083°N 11.967°W﻿ / 51.083; -11.967) by SM UC-27 ( Imperial German Navy). |
| Fife Ness | United Kingdom | World War I: The fishing vessel was shelled and sunk in the North Sea 23 nautical miles (43 km) east north east of Fraserburgh, Aberdeenshire by SM UC-76 ( Imperial German Navy). Her crew survived. |
| Glencliffe | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 2.5 nautical miles (4.6 km) off Tabarca Island, Alicante, Spain (38°07′N 0°22′W﻿ / ﻿38.117°N 0.367°W﻿ / 38.117; -0.367) by SM U-52 ( Imperial German Navy) with the loss of a crew member. Three survivors were taken as prisoners of war. |
| India | Greece | World War I: The cargo ship was sunk in the Mediterranean Sea east of Gibraltar by SM U-35 ( Imperial German Navy). |
| Kildale | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 40 nautical miles (74 km) east of Pantelleria, Italy (36°44′N 12°32′E﻿ / ﻿36.733°N 12.533°E﻿ / 36.733; 12.533) SM U-32 ( Imperial German Navy) with the loss of a crew member. |
| Kolaastind | Norway | World War I: The cargo ship was sunk in the North Sea (60°14′N 2°42′E﻿ / ﻿60.233°N 2.700°E﻿ / 60.233; 2.700) by SM U-30 ( Imperial German Navy) with the loss of four crew. |
| Largo Bay | United Kingdom | World War I: The trawler was shelled and sunk in the North Sea 30 nautical miles (56 km) north east by east of Buchan Ness by SM UC-76 ( Imperial German Navy). Her crew survived. |
| Lilian | United Kingdom | World War I: The trawler was shelled and sunk in the North Sea 45 nautical miles (83 km) north east by east of Girdle Ness by SM UC-76 ( Imperial German Navy). Her crew survived. |
| Lismore | United Kingdom | World War I: The passenger ship was torpedoed and sunk in the English Channel 22 nautical miles (41 km) north west by north of Le Havre, Seine-Inférieure, France (49°48′N 0°18′W﻿ / ﻿49.800°N 0.300°W﻿ / 49.800; -0.300) by SM UB-38 ( Imperial German Navy) with the loss of five lives. |
| Neptunus | Netherlands | World War I: The sailing vessel was sunk in the North Sea 20 nautical miles (37 km) east north east of Hartlepool by SM UC-31 ( Imperial German Navy). |
| Niritos | Greece | World War I: The cargo ship was sunk in the Mediterranean Sea 5 nautical miles (9.3 km) off Augusta, Sicily, Italy (37°13′N 15°20′E﻿ / ﻿37.217°N 15.333°E﻿ / 37.217; 15.333) by SM U-27 ( Austro-Hungarian Navy). |
| Osprey | United Kingdom | World War I: The trawler was shelled and sunk in the North Sea 45 nautical miles (83 km) north east by east of Girdle Ness by SM UC-76 ( Imperial German Navy). Her crew survived. |
| Toro | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 200 nautical miles (370 km) west north west of Ouessant, Finistère, France (48°30′N 10°00′W﻿ / ﻿48.500°N 10.000°W﻿ / 48.500; -10.000) by SM U-55 ( Imperial German Navy) with the loss of fourteen crew. Two survivors were taken as prisoners of war. |
| Union | Denmark | World War I: The schooner was sunk in the North Sea 18 to 20 nautical miles (33 to 37 km) east of the Souter Lighthouse, County Durham by SM UC-31 ( Imperial German Navy). Her crew survived. |
| Voorwarts | Netherlands | World War I: The schooner was sunk in the North Sea 20 nautical miles (37 km) east north east of Hartlepool by SM UC-31 ( Imperial German Navy). |

## 13 April

List of shipwrecks: 13 April 1917 :
| Ship | State | Description |
| Argyll | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 110 nautical miles (200 km) west of the Bishop Rock, Isles of Scilly (49°23′N 9°07′W﻿ / ﻿49.383°N 9.117°W﻿ / 49.383; -9.117) by SM U-84 ( Imperial German Navy) with the loss of 22 of her crew. |
| Bandon | United Kingdom | World War I: The cargo ship struck a mine placed by SM UC-44 ( Imperial German Navy) and sank in the Atlantic Ocean 2.5 nautical miles (4.6 km) south west of Mine Head, Waterford (51°57′N 7°35′W﻿ / ﻿51.950°N 7.583°W﻿ / 51.950; -7.583) with the loss of 28 of her crew. |
| Bokn | Norway | World War I: The coaster was sunk in the North Sea 95 nautical miles (176 km) off the Hellisøy Lighthouse, Hordaland (60°04′N 0°45′E﻿ / ﻿60.067°N 0.750°E﻿ / 60.067; 0.750) by SM U-30 ( Imperial German Navy). Her crew survived. |
| Frixos | Russian Empire | World War I: The cargo ship was torpedoed and sunk in the North Sea 60 nautical miles (110 km) east of the Shetland Islands, United Kingdom (60°04′N 0°45′E﻿ / ﻿60.067°N 0.750°E﻿ / 60.067; 0.750) by SM U-30 ( Imperial German Navy). |
| Gama | Norway | World War I: The coaster was sunk in the North Sea (60°24′N 1°15′E﻿ / ﻿60.400°N 1.250°E﻿ / 60.400; 1.250) by SM U-30 ( Imperial German Navy). Her crew survived. |
| Gambetta | France | World War I: The sailing vessel was sunk in the Bay of Biscay off the Île d'Yeu, Finistère by SM UC-26 ( Imperial German Navy). |
| Giuseppe Accame | Italy | World War I: The cargo ship was sunk in the Mediterranean Sea 40 nautical miles (74 km) west of Cape Spartel, Morocco by SM U-35 ( Imperial German Navy). |
| Glenlora | Norway | World War I: The barque was sunk in the North Sea (60°36′N 1°53′E﻿ / ﻿60.600°N 1.883°E﻿ / 60.600; 1.883) by SM U-30 ( Imperial German Navy). Her crew survived. |
| Kariba | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 260 nautical miles (480 km) west north west of Ouessant, Finistère, France (48°30′N 11°28′W﻿ / ﻿48.500°N 11.467°W﻿ / 48.500; -11.467) by SM UC-27 ( Imperial German Navy) with the loss of thirteen of her crew. |
| Maggie Todd | United States | The schooner went ashore at Wood End, Provincetown, Massachusetts. Refloated and returned to service. |
| Maria | United Kingdom | World War I: The schooner was scuttled in the English Channel 25 nautical miles (46 km) south west of Portland Bill, Dorset by SM UB-38 ( Imperial German Navy). Her crew survived. |
| HMML 534 | Royal Navy | The motor launch was lost in the Mediterranean Sea on this date. |
| Odysseus | Greece | World War I: The cargo ship was sunk in the Mediterranean Sea 30 nautical miles (56 km) west of Cape Spartel by SM U-35 ( Imperial German Navy). |
| HMT Pitstruan | Royal Navy | World War I: The naval trawler struck a mine placed by SM UC-76 ( Imperial German Navy) and sank in the North Sea 3 nautical miles (5.6 km) south east of the Noss Head Lighthouse, Shetland Islands with the loss of eleven of her crew. |
| Stork | United Kingdom | World War I: The trawler was scuttled in the North Sea 20 nautical miles (37 km) east of St Abb's Head, Berwickshire by SM UC-41 ( Imperial German Navy). Her crew survived. |
| Strathcona | Canada | World War I: The cargo ship was scuttled in the Atlantic Ocean 145 nautical miles (269 km) west north west of North Ronaldsay, Orkney Islands, United Kingdom (59°35′N 5°49′W﻿ / ﻿59.583°N 5.817°W﻿ / 59.583; -5.817) by SM U-78 ( Imperial German Navy) with the loss of nine crew. Three survivors were taken as prisoners of war. |
| Stromboli | Italy | World War I: The cargo ship was sunk in the Mediterranean Sea 50 nautical miles (93 km) west of Cape Spartel by SM U-35 ( Imperial German Navy). |
| W. F. Babcock | United States | The schooner barge went ashore on Monomoy Point, Massachusetts. Refloated and returned to service. |
| Zara | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the North Sea 90 nautical miles (170 km) off the Hellisøy Lighthouse (60°08′N 1°52′E﻿ / ﻿60.133°N 1.867°E﻿ / 60.133; 1.867) by SM U-30 ( Imperial German Navy) with the loss of 27 lives. |

## 14 April

List of shipwrecks: 14 April 1917 :
| Ship | State | Description |
| Andromach | United Kingdom | World War I: The trawler was scuttled in the Atlantic Ocean west of the Shetland Islands by SM U-78 ( Imperial German Navy). Her captain was taken as a prisoner of war. The other eleven crew took to the lifeboat but were not found. |
| Cinque Ottobre | Italy | World War I: The sailing vessel was sunk in the Mediterranean Sea off the coast of Tunisia by SM UC-20 ( Imperial German Navy). |
| Fjeldli | Norway | World War I: The coaster was sunk in the North Sea 76 nautical miles (141 km) west by north of the Marstein Lighthouse, Hordaland (60°02′N 2°10′E﻿ / ﻿60.033°N 2.167°E﻿ / 60.033; 2.167) by SM U-30 ( Imperial German Navy). Her crew survived. |
| Gange | French Navy | World War I: The troopship struck a mine and sank in the Mediterranean Sea 33 nautical miles (61 km) north east of Cape Serrat, Algeria (37°24′N 9°50′E﻿ / ﻿37.400°N 9.833°E﻿ / 37.400; 9.833) by SM UC-37 ( Imperial German Navy) with the loss of one life. |
| Hermione | United Kingdom | World War I: The cargo ship struck a mine placed by SM UC-33 ( Imperial German Navy) and was damaged in the Irish Sea off the Coningbeg Lightship ( United Kingdom). She was beached in Dunmore Bay where she was declared a constructive total loss. Subsequently scrapped in situ. |
| HMT Orcades | Royal Navy | World War I: The naval trawler struck a mine placed by SM UC-7 ( Imperial German Navy) and sank in the North Sea off Grimsby with the loss of six of her crew. |
| Patagonier | United Kingdom | World War I: The cargo ship was shelled and sunk in the Mediterranean Sea 135 nautical miles (250 km)) west of Gibraltar (36°00′N 9°00′W﻿ / ﻿36.000°N 9.000°W﻿ / 36.000; -9.000) by SM U-35 ( Imperial German Navy). Her crew survived. |
| Progresso | Italy | World War I: The tug was sunk in the Mediterranean Sea off the coast of Tunisia by SM UC-20 ( Imperial German Navy). |
| Spray | United Kingdom | World War I: The cargo ship was sunk in the North Sea 3.5 nautical miles (6.5 km) north east of the mouth of the River Tyne by SM UC-30 ( Imperial German Navy). Her crew survived. |
| Tom | Spain | World War I: The cargo ship was sunk in the Bay of Biscay 12 nautical miles (22 km) off Hourtin, Gironde, France (45°05′N 1°30′W﻿ / ﻿45.083°N 1.500°W﻿ / 45.083; -1.500) by SM UC-26 ( Imperial German Navy). Her crew survived. |
| Tres Macs | Portugal | World War I: The auxiliary sailing vessel was shelled and sunk in the Mediterranean Sea (36°39′N 7°22′W﻿ / ﻿36.650°N 7.367°W﻿ / 36.650; -7.367) by SM U-52 ( Imperial German Navy). |
| Venus | Norway | World War I: The coaster struck a mine placed by SM UC-50 ( Imperial German Navy) and sank in the North Sea 5 nautical miles (9.3 km) off Berwick-upon-Tweed, Northumberland, United Kingdom with the loss of fourteen of her crew. |

## 15 April

List of shipwrecks: 15 April 1917 :
| Ship | State | Description |
| A-5 | United States Navy | Sunk at Cavite Navy Yard in the Philippines due to a ballast tank leak. Raised and returned to service. |
| Alert | United Kingdom | World War I: The coaster struck a mine and sank in the English Channel off Dover, Kent. |
| Alessio Cocco | Italy | World War I: The sailing vessel was sunk in the Mediterranean Sea off the coast of Tunisia by SM UC-20 ( Imperial German Navy). |
| Arcadian | United Kingdom | SS ArcadianWorld War I: The troopship was torpedoed and sunk in the Sea of Crete 26 nautical miles (48 km) northeast of Milos, Greece (36°50′N 24°50′E﻿ / ﻿36.833°N 24.833°E﻿ / 36.833; 24.833) by SM UC-74 ( Imperial German Navy) with the loss of 277 lives. |
| Astræa | Denmark | World War I: The barquentine was set afire and sunk in the Atlantic Ocean south west of the Isles of Scilly, United Kingdom (49°00′N 10°30′W﻿ / ﻿49.000°N 10.500°W﻿ / 49.000; -10.500) by SM U-55 ( Imperial German Navy) with the loss of seven crew. |
| Brothertoft | United Kingdom | World War I: The trawler was sunk in the North Sea (approximately 55°50′N 1°30′E﻿ / ﻿55.833°N 1.500°E﻿ / 55.833; 1.500) by SM UC-30 ( Imperial German Navy). |
| Cameronia | United Kingdom | World War I: The troopship was torpedoed and sunk in the Mediterranean Sea 150 nautical miles (280 km) east of Malta (35°50′N 17°32′E﻿ / ﻿35.833°N 17.533°E﻿ / 35.833; 17.533) by SM U-33 ( Imperial German Navy) with the loss of 140-210 of the 2,650-plus people on board. Survivors were rescued by HMS Nemesis and HMS Rifleman (both Royal Navy). |
| Dalmatian | United Kingdom | World War I: The trawler was scuttled in the North Sea by SM UC-44 ( Imperial German Navy). Her nine crew took to the lifeboats but did not survive. |
| Fram | Denmark | World War I: The schooner was shelled and sunk in the North Sea (56°35′N 2°45′W﻿ / ﻿56.583°N 2.750°W﻿ / 56.583; -2.750) by SM U-93 ( Imperial German Navy). |
| Gretaston | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean (43°08′N 11°32′W﻿ / ﻿43.133°N 11.533°W﻿ / 43.133; -11.533) by SM UC-27 ( Imperial German Navy) with the loss of all 29 crew. |
| Heikina | Netherlands | World War I: The sailing vessel was sunk in the North Sea by SM UC-44 ( Imperial German Navy). Her crew took to the lifeboats but did not survive. |
| Mashobra | United Kingdom | World War I: The passenger ship was torpedoed and sunk in the Mediterranean Sea 140 nautical miles (260 km) south west of Cape Matapan, Greece (35°34′N 20°40′E﻿ / ﻿35.567°N 20.667°E﻿ / 35.567; 20.667) by SM U-28 ( Austro-Hungarian Navy) with the loss of eight lives. Her captain was taken as a prisoner of war. |
| Møhlenpris | Norway | World War I: The coaster was sunk in the English Channel 15 nautical miles (28 km) south west of Beachy Head, Sussex, United Kingdom (50°38′N 0°15′W﻿ / ﻿50.633°N 0.250°W﻿ / 50.633; -0.250) by SM UB-40 ( Imperial German Navy). Her crew survived. |
| Panaghi Drakatos | Greece | World War I: The cargo ship was sunk in the Atlantic Ocean 26 nautical miles (48 km) off Cape Santa Maria, Portugal by SM U-35 ( Imperial German Navy). Her crew survived. |
| Paris | Norway | World War I: The cargo ship was sunk in the North Sea 100 nautical miles (190 km) west of Greipengen by SM U-30 ( Imperial German Navy). Her crew survived. |
| Sutterton | United Kingdom | World War I: The trawler was scuttled in the North Sea 65 nautical miles (120 km) east south east of St Abb's Head, Berwickshire (55°45′N 0°15′W﻿ / ﻿55.750°N 0.250°W﻿ / 55.750; -0.250) by SM UC-44 ( Imperial German Navy) with the loss of a crew member. |
| Tusnastabb | Norway | World War I: The coaster struck a mine and sank in the English Channel off Cap Gris Nez, Pas-de-Calais, France (50°54′N 1°34′E﻿ / ﻿50.900°N 1.567°E﻿ / 50.900; 1.567). Her crew survived. |

## 16 April

List of shipwrecks: 16 April 1917 :
| Ship | State | Description |
| Amanda | Sweden | World War I: The brig was scuttled in the North Sea (56°27′N 3°00′E﻿ / ﻿56.450°N 3.000°E﻿ / 56.450; 3.000) by SM UC-51 ( Imperial German Navy). Her crew survived. |
| Anne | Denmark | World War I: The three-masted schooner was scuttled in the Atlantic Ocean west of Ireland (51°45′N 17°20′W﻿ / ﻿51.750°N 17.333°W﻿ / 51.750; -17.333) by SM U-43 ( Imperial German Navy). Her crew survived. |
| HMS C16 | Royal Navy | The C-class submarine was rammed and sunk at Harwich, Essex by HMS Melampus ( Royal Navy) with the loss of all sixteen crew. She was subsequently salvaged, repaired and returned to service. |
| Cairndhu | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the English Channel 25 nautical miles (46 km) west of Beachy Head, Sussex by SM UB-40 ( Imperial German Navy) with the loss of eleven of her crew. |
| Crios | Greece | World War I: The cargo ship was scuttled in the Atlantic Ocean off Cape Espichel, Portugal (38°20′N 9°12′W﻿ / ﻿38.333°N 9.200°W﻿ / 38.333; -9.200) by SM U-52 ( Imperial German Navy). |
| Eduard | United Kingdom | World War I: The three-masted schooner was scuttled in the English Channel 12 nautical miles (22 km) south west of Beachy Head (50°34′N 0°05′E﻿ / ﻿50.567°N 0.083°E﻿ / 50.567; 0.083) by SM UC-70 ( Imperial German Navy). Her crew survived. |
| Endymion | Russia | World War I: The sailing vessel was scuttled in the Atlantic Ocean 250 nautical miles (460 km) west of Galway, United Kingdom (52°30′N 16°20′W﻿ / ﻿52.500°N 16.333°W﻿ / 52.500; -16.333) by SM U-43 ( Imperial German Navy). |
| Lord Chancellor | United Kingdom | World War I: The trawler was scuttled in the North Sea 50 nautical miles (93 km) north east of the Longstone Lighthouse, Northumberland by SM UC-41 ( Imperial German Navy). Her crew survived. |
| Marden | United Kingdom | World War I: The coaster was shelled and sunk in the English Channel 6 nautical miles (11 km) north west of Cap Gris Nez, Pas-de-Calais, France by SM UB-36 ( Imperial German Navy) with the loss of a crew member. |
| Polycarp | Norway | World War I: The sailing vessel was sunk in the North Sea (56°23′N 2°52′E﻿ / ﻿56.383°N 2.867°E﻿ / 56.383; 2.867) by SM UC-51 ( Imperial German Navy). Her crew survived. |
| Queen Mary | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 180 nautical miles (330 km) north west by north of the Fastnet Rock (51°48′N 14°52′W﻿ / ﻿51.800°N 14.867°W﻿ / 51.800; -14.867) by SM U-60 ( Imperial German Navy) with the loss of nine crew. |
| Rochester Castle | United Kingdom | World War I: The ketch was shelled and sunk in the English Channel 5 nautical miles (9.3 km) west south west of Cap Gris Nez by SM UB-36 ( Imperial German Navy). Her crew survived. |
| Rosetta | Egypt | World War I: The sailing vessel was sunk in the Mediterranean Sea off Gaza by SM UB-42 ( Imperial German Navy). |
| Sagres | Portugal | World War I: The cargo ship struck a mine and sank in the Mediterranean Sea off Cap Blanc, Tunisia. |
| Sea Products Co. No. 1 | United States | The barge sank in a storm with high winds and high seas off the coast of California half way between Point Dume and San Pedro, California, a total loss. |
| Smeul | Royal Romanian Navy | World War I: The Nǎluca-class torpedo boat was sunk by Ottoman mines laid by the cruiser Midilli ( Ottoman Navy) in the Danube River Estuary. |
| Sontay | France | World War I: The passenger ship was sunk in the Mediterranean Sea 100 nautical miles (190 km) south east of Malta (35°02′N 16°28′E﻿ / ﻿35.033°N 16.467°E﻿ / 35.033; 16.467) by SM U-33 ( Imperial German Navy). Her crew survived. |
| Towergate | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 250 nautical miles (460 km) north west by west of the Fastnet Rock (52°10′N 16°16′W﻿ / ﻿52.167°N 16.267°W﻿ / 52.167; -16.267) by SM U-43 ( Imperial German Navy). Her crew survived. |
| Victoria | United Kingdom | World War I: The three-masted schooner was scuttled in the English Channel 30 nautical miles (56 km) south west of Beachy Head by SM UB-40 ( Imperial German Navy). Her crew survived. |

## 17 April

List of shipwrecks: 17 April 1917 :
| Ship | State | Description |
| Aburi | United Kingdom | World War I: The Elder Dempster 3,730 GRT cargo liner was torpedoed and sunk in the Atlantic Ocean 125 nautical miles (232 km) north west of Tory Island, County Donegal (56°15′N 11°30′W﻿ / ﻿56.250°N 11.500°W﻿ / 56.250; -11.500) by SM U-61 ( Imperial German Navy) with the loss of 25 crew. |
| Bretagne | Denmark | World War I: The cargo ship was sunk in the North Sea 8 to 9 nautical miles (15 to 17 km) off Rattray Head, Aberdeenshire, United Kingdom (57°43′N 1°42′W﻿ / ﻿57.717°N 1.700°W﻿ / 57.717; -1.700) by SM UC-45 ( Imperial German Navy). Her crew survived. |
| Brisbane River | United Kingdom | World War I: The cargo ship was scuttled in the Atlantic Ocean 140 nautical miles (260 km) west of Gibraltar (35°30′N 8°10′W﻿ / ﻿35.500°N 8.167°W﻿ / 35.500; -8.167) by SM U-35 ( Imperial German Navy). Her crew survived, but her captain was taken as a prisoner of war. |
| Cairnhill | United Kingdom | World War I: The cargo ship was scuttled in the Atlantic Ocean 160 nautical miles (300 km) south west of the Fastnet Rock (52°09′N 13°16′W﻿ / ﻿52.150°N 13.267°W﻿ / 52.150; -13.267) by SM U-55 ( Imperial German Navy). Her crew survived, but her captain was taken as a prisoner of war. |
| Charles Goodanew | United Kingdom | World War I: The coaster was sunk in the North Sea 3.5 nautical miles (6.5 km) north north east of Rattray Head (57°39′N 1°45′W﻿ / ﻿57.650°N 1.750°W﻿ / 57.650; -1.750) by SM UC-45 ( Imperial German Navy) with the loss of thirteen of her crew. |
| Corfu | United Kingdom | World War I: The cargo ship was scuttled in the Atlantic Ocean 160 nautical miles (300 km) west of Gibraltar (35°14′N 8°25′W﻿ / ﻿35.233°N 8.417°W﻿ / 35.233; -8.417) by SM U-35 ( Imperial German Navy) with the loss of three crew. |
| Costante | Italy | World War I: The cargo ship was sunk in the Mediterranean Sea off the coast of Algeria (36°53′N 4°15′E﻿ / ﻿36.883°N 4.250°E﻿ / 36.883; 4.250) by SM U-32 ( Imperial German Navy). |
| Dantzic | United Kingdom | World War I: The schooner was scuttled in the Irish Sea 30 nautical miles (56 km) south by west of St. Ann's Head, Pembrokeshire by SM UC-47 ( Imperial German Navy). Her crew survived. |
| Donegal | United Kingdom |: World War I: The hospital ship was torpedoed and sunk in the English Channel 19 nautical miles (35 km) south of the Dean Lightship ( United Kingdom) (50°26′N 1°00′W﻿ / ﻿50.433°N 1.000°W﻿ / 50.433; -1.000) by SM UC-21 ( Imperial German Navy) with the loss of 40 lives. |
| Fernmoor | United Kingdom | World War I: The cargo ship was scuttled in the Atlantic Ocean 150 nautical miles (280 km) west of Gibraltar (35°30′N 8°18′W﻿ / ﻿35.500°N 8.300°W﻿ / 35.500; -8.300) by SM U-35 ( Imperial German Navy). Her crew survived. |
| Kish | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 160 nautical miles (300 km) north west by west of the Fastnet Rock by SM U-67 ( Imperial German Navy) with the loss of six crew. |
| HMHS Lanfranc | Royal Navy | World War I: The hospital ship was torpedoed and sunk in the English Channel 42 nautical miles (78 km) north of Le Havre, Seine-Inférieure, France (50°11′N 0°12′E﻿ / ﻿50.183°N 0.200°E﻿ / 50.183; 0.200) by SM UB-40 ( Imperial German Navy) with the loss of 40 lives. |
| Robert | Denmark | World War I: The cargo ship was torpedoed and sunk in the North Sea 14 nautical miles (26 km) east of Fair Isle, United Kingdom by SM UC-76 ( Imperial German Navy) with the loss of eight crew. |
| U.S.A. | United Kingdom | World War I: The fishing vessel was scuttled in the North Sea 16 nautical miles (30 km) east north east of the Longstone Lighthouse, Northumberland (55°54′N 1°06′W﻿ / ﻿55.900°N 1.100°W﻿ / 55.900; -1.100) by SM UC-41 ( Imperial German Navy). Her crew survived. |
| William Shephard | United Kingdom | World War I: The three-masted schooner was scuttled in the Irish Sea 30 nautical miles (56 km) south by west of St. Ann's Head by SM UC-47 ( Imperial German Navy). Her crew survived. |

## 18 April

List of shipwrecks: 18 April 1917 :
| Ship | State | Description |
| Atalanta | Sweden | World War I: The cargo ship was sunk in the North Sea with the loss of all but one crew – 16 dead. The U-boat was SM U-86 ( Imperial German Navy). |
| Bergensgut | Norway | World War I: The cargo ship was sunk in the North Sea 60 nautical miles (110 km) east of Peterhead, Aberdeenshire, United Kingdom by SM UC-76 ( Imperial German Navy) with the loss of ten of her crew. |
| Castilian | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 110 nautical miles (200 km) north west by north of Tory Island, County Donegal (56°20′N 10°45′W﻿ / ﻿56.333°N 10.750°W﻿ / 56.333; -10.750) by SM U-61 ( Imperial German Navy) with the loss of ten crew. |
| Cragoswald | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 60 nautical miles (110 km) west by south of the Bishop Rock, Isles of Scilly by SM U-84 ( Imperial German Navy). with the loss of two of her crew. |
| Heim | Norway | World War I: The cargo ship struck a mine and sank in the English Channel 10 nautical miles (19 km) north of Pointe d'Ailly, Seine-Inférieure, France with the loss of two of her crew. by SM UC-71 ( Imperial German Navy). |
| John S. Boyle | United Kingdom | World War I: The fishing vessel was scuttled in the North Sea 25 nautical miles (46 km) east by south of St Abb's Head, Berwickshire (56°16′N 1°33′W﻿ / ﻿56.267°N 1.550°W﻿ / 56.267; -1.550) by SM UC-41 ( Imperial German Navy). Her crew survived. |
| Louisiana | Denmark | World War I: The cargo ship was torpedoed and sunk in the North Sea 20 nautical miles (37 km)) north north east of Buchan Ness, (57°47′N 1°22′W﻿ / ﻿57.783°N 1.367°W﻿ / 57.783; -1.367) by SM UC-45 ( Imperial German Navy). Her crew survived. |
| Marcel | Belgium | World War I: The tug was scuttled in the North Sea 8 nautical miles (15 km) north east of the Noord Hinder Lightship ( Netherlands) by SM UB-23 ( Imperial German Navy). |
| Rameses | United Kingdom | World War I: The trawler was scuttled in the North Sea 45 nautical miles (83 km) east of St Abb's Head (56°14′N 1°29′W﻿ / ﻿56.233°N 1.483°W﻿ / 56.233; -1.483) by SM UC-41 ( Imperial German Navy). Her crew survived. |
| Rhydwen | United Kingdom | World War I: the cargo ship was torpedoed and sunk in the Atlantic Ocean 170 nautical miles (310 km) north west by west of the Fastnet Rock (51°40′N 14°00′W﻿ / ﻿51.667°N 14.000°W﻿ / 51.667; -14.000) by SM U-67 ( Imperial German Navy) with the loss of six crew. |
| Rinaldo | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 18 nautical miles (33 km) west by north of Cape Cherchell, Algeria (36°35′N 1°48′E﻿ / ﻿36.583°N 1.800°E﻿ / 36.583; 1.800) by SM U-32 ( Imperial German Navy). Her crew survived. |
| Rowena | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 95 nautical miles (176 km) west by south of the Bishop Rock (49°03′N 8°25′W﻿ / ﻿49.050°N 8.417°W﻿ / 49.050; -8.417) by SM U-84 ( Imperial German Navy) with the loss of a crew member. |
| Scalpa | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 150 nautical miles (280 km) north west by west of the Fastnet Rock by SM U-53 ( Imperial German Navy). Her crew survived. |
| Sculptor | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 120 nautical miles (220 km) north west by west of the Fastnet Rock (51°56′N 12°50′W﻿ / ﻿51.933°N 12.833°W﻿ / 51.933; -12.833) by SM U-53 ( Imperial German Navy) with the loss of a crew member. |
| Surcouf | France | World War I: The sailing vessel was sunk in the English Channel off Île Vierge, Finistère by SM UC-26 ( Imperial German Navy). Her crew survived. |
| Thistle | United States | During a voyage from Seattle, Washington, to Nushagak, Territory of Alaska, the 102-gross register ton, 90.5-foot (27.6 m) steam fishing vessel ran aground in the Gulf of Georgia on Pender Island in the southern Gulf Islands in British Columbia, Canada. When the tide turned, she floated free, but then sank due to the damage she suffered in the grounding. All 14 people on board survived and were rescued by the steamer Admiral Farragut ( United States). |
| Thomas | United Kingdom | World War I: The schooner was scuttled in the Atlantic Ocean 40 nautical miles (74 km) off Cape St. Vincent, Portugal by SM UC-27 ( Imperial German Navy). Her crew survived. |
| Trekieve | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 100 nautical miles (190 km) west of Gibraltar (35°00′N 9°45′W﻿ / ﻿35.000°N 9.750°W﻿ / 35.000; -9.750) by SM U-35 ( Imperial German Navy) with the loss of three crew. |
| Troldfos | Norway | World War I: The cargo ship was sunk in the Atlantic Ocean 50 nautical miles (93 km) west north west of the Shetland Islands, United Kingdom by SM U-93 ( Imperial German Navy). Her crew survived. |
| West Lothian | Norway | World War I: The four-masted barque was torpedoed and sunk in the Atlantic Ocean 50 nautical miles (93 km) west of the Shetland Islands (60°55′N 3°30′W﻿ / ﻿60.917°N 3.500°W﻿ / 60.917; -3.500) by SM U-93 ( Imperial German Navy). Her crew survived. |
| Witham | United Kingdom | World War I: The trawler was shelled and sunk in the North Sea 125 nautical miles (232 km) east by south of St Abb's Head (55°56′N 1°36′E﻿ / ﻿55.933°N 1.600°E﻿ / 55.933; 1.600) by SM UC-50 ( Imperial German Navy). Her crew survived. |

## 19 April

List of shipwrecks: 19 April 1917 :
| Ship | State | Description |
| Avocet | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 100 nautical miles (190 km) west north west of the Fastnet Rock (51°19′N 12°30′W﻿ / ﻿51.317°N 12.500°W﻿ / 51.317; -12.500) by SM U-50 ( Imperial German Navy). Her crew survived. |
| Bethlehem | United Kingdom | World War I: The auxiliary sailing vessel struck a mine and sank in the North Sea with the loss of a crew member. |
| Cilurnum | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Bay of Biscay 5 nautical miles (9.3 km) south west of Penmarc'h, Finistère, France (47°45′N 4°30′W﻿ / ﻿47.750°N 4.500°W﻿ / 47.750; -4.500) by SM UC-21 ( Imperial German Navy) with the loss of a crew member. |
| Ellida | Norway | World War I: The cargo ship was sunk in the North Sea 2.5 nautical miles (4.6 km) east north east of Whitby, Yorkshire, United Kingdom by SM UB-41 ( Imperial German Navy). Her crew survived. |
| Elswick Manor | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 180 nautical miles (330 km) west of Ouessant, Finistère, France (47°36′N 9°32′W﻿ / ﻿47.600°N 9.533°W﻿ / 47.600; -9.533) by SM U-84 ( Imperial German Navy). Her crew survived. |
| Gold Coast | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 14 nautical miles (26 km) south of Mine Head, Waterford (51°46′N 7°28′W﻿ / ﻿51.767°N 7.467°W﻿ / 51.767; -7.467) by SM UC-47 ( Imperial German Navy). Her crew survived. |
| Howth Head | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 158 nautical miles (293 km) north west of the Fastnet Rock (52°20′N 13°38′W﻿ / ﻿52.333°N 13.633°W﻿ / 52.333; -13.633) by SM U-60 ( Imperial German Navy) with the loss of two crew. |
| Jewel | United Kingdom | World War I: The brig was scuttled in St. George's Channel 20 nautical miles (37 km) south east of the Coningbeg Lightship ( United Kingdom) by SM UC-47 ( Imperial German Navy). Her crew survived. |
| HMT Lobelia | Royal Navy | World War I: The naval trawler struck a mine and sank off Fanad Point, Lough Swilly (55°16′N 7°45′W﻿ / ﻿55.267°N 7.750°W﻿ / 55.267; -7.750) with the loss of eleven crew. |
| Poltava | United Kingdom | World War I: The coaster struck a mine and sank in the North Sea 3 nautical miles (5.6 km) east north east of the Souter Point Lighthouse, South Shields, County Durham (54°59′00″N 1°16′30″W﻿ / ﻿54.98333°N 1.27500°W﻿ / 54.98333; -1.27500). Her crew survived. |
| SMS Seeadler | Imperial German Navy | The hulk exploded and sank at Wilhelmshaven, Lower Saxony. |
| Senator Dantziger | United Kingdom | World War I: the schooner was shelled and sunk in the English Channel 15 nautical miles (28 km) south by east of Newhaven, Sussex by SM UC-26 ( Imperial German Navy). Her crew survived. |
| Senhora da Conceicao | Portugal | World War I: The sailing vessel was scuttled in the Atlantic Ocean north of Cape Finisterre, Spain (43°38′N 10°00′W﻿ / ﻿43.633°N 10.000°W﻿ / 43.633; -10.000) by SM U-52 ( Imperial German Navy). |
| Sowwell | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 170 nautical miles (310 km) west of Gibraltar by SM U-35 ( Imperial German Navy) with the loss of 21 crew. |
| HMT Star of Freedom | Royal Navy | World War I: The naval trawler struck a mine and sank in the Atlantic Ocean off Trevose Head, Cornwall (50°35′N 5°25′W﻿ / ﻿50.583°N 5.417°W﻿ / 50.583; -5.417 with the loss of ten of her crew. |
| Tempus | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 130 nautical miles (240 km) north west by west of the Fastnet Rock by SM U-53 ( Imperial German Navy) with the loss of a crew member. |

## 20 April

List of shipwrecks: 20 April 1917 :
| Ship | State | Description |
| Annapolis | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 74 nautical miles (137 km) north west of Eagle Island, County Mayo (55°45′N 11°45′W﻿ / ﻿55.750°N 11.750°W﻿ / 55.750; -11.750) by SM U-61 and SM U-69 (both Imperial German Navy). Her crew survived. |
| August | Russia | World War I: The barque was sunk in the Atlantic Ocean 300 nautical miles (560 km) west of Ireland (50°25′N 16°40′W﻿ / ﻿50.417°N 16.667°W﻿ / 50.417; -16.667) by SM U-43 ( Imperial German Navy). |
| Ballochbuie | United Kingdom | World War I: The coaster was torpedoed and sunk in the North Sea 7 nautical miles (13 km) east of the Isle of May, Fife by SM UC-41 ( Imperial German Navy) with the loss of three of her crew. |
| Caithness | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 130 nautical miles (240 km) north west by north of Cape Ortegal, Spain (45°48′N 11°07′W﻿ / ﻿45.800°N 11.117°W﻿ / 45.800; -11.117) by SM U-52 ( Imperial German Navy) with the loss of 47 crew. |
| Erith | United Kingdom | World War I: The trawler was scuttled in the North Sea 40 nautical miles (74 km) south of Girdleness, Aberdeenshire by SM UC-44 ( Imperial German Navy). Her crew survived. |
| Emma | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 200 nautical miles (370 km) south west by south of the Fastnet Rock (49°55′N 14°40′W﻿ / ﻿49.917°N 14.667°W﻿ / 49.917; -14.667) by SM U-50 ( Imperial German Navy) with the loss of two crew. |
| Georgios | Greece | World War I: The cargo ship was sunk in the Bay of Biscay 11 nautical miles (20 km) south east of La Vieille, Finistère, France (47°56′N 4°27′W﻿ / ﻿47.933°N 4.450°W﻿ / 47.933; -4.450) by SM UC-21 ( Imperial German Navy). |
| Grecian | United Kingdom | World War I: The trawler was scuttled in the North Sea 22 nautical miles (41 km) north east by east of the Longstone Lighthouse, Northumberland by SM UC-44 ( Imperial German Navy). Her crew survived. |
| HMT Loch Eye | Royal Navy | World War I: The naval trawler struck a mine and sank in the Irish Sea 1.25 nautical miles (2.32 km) south west of Hook Point, County Waterford (52°08′N 6°59′W﻿ / ﻿52.133°N 6.983°W﻿ / 52.133; -6.983 with the loss of seven of her crew. |
| Lowdale | United Kingdom | World War I: The collier was shelled and sunk in the Atlantic Ocean 90 nautical miles (170 km) west by north of Gibraltar by SM U-35 ( Imperial German Navy). Her crew survived. |
| Malakand | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 145 nautical miles (269 km) west of the Bishop Rock, Isles of Scilly (49°20′N 10°00′W﻿ / ﻿49.333°N 10.000°W﻿ / 49.333; -10.000) by SM U-84 ( Imperial German Navy) with the loss of a crew member. |
| Nentmoor | United Kingdom | World War I: The cargo ship was shelled and sunk in the Atlantic Ocean 140 nautical miles (260 km) west of Gibraltar (35°25′N 8°02′W﻿ / ﻿35.417°N 8.033°W﻿ / 35.417; -8.033) by SM U-35 ( Imperial German Navy). Her crew survived. |
| HMS Nepaulin | Royal Navy | World War I: The auxiliary minesweeper struck a mine and sank in the North Sea off the Dyck Lightship ( United Kingdom) with the loss of nineteen of her crew. |
| HMT Othonna | Royal Navy | World War I: The naval trawler struck a mine and sank in the North Sea (56°17′N 2°27′W﻿ / ﻿56.283°N 2.450°W﻿ / 56.283; -2.450) with the loss of nine of her crew. |
| Portloe | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 160 nautical miles (300 km) west north west of the Fastnet Rock (51°13′N 14°10′W﻿ / ﻿51.217°N 14.167°W﻿ / 51.217; -14.167) by SM U-67 ( Imperial German Navy) with the loss of 24 crew. |
| Ringholm | Norway | World War I: The coaster was sunk in the North Sea 5 nautical miles (9.3 km) off St. Abb's Head, Berwickshire, United Kingdom by SM UC-41 ( Imperial German Navy). Her crew survived. |
| HMT Ruthin Castle | Royal Navy | World War I: The naval trawler struck a mine and sank in the North Sea off Skinningrove, Yorkshire (54°37′N 0°53′W﻿ / ﻿54.617°N 0.883°W﻿ / 54.617; -0.883) with the loss of nine of her crew. |
| San Hilario | United Kingdom | World War I: The tanker was torpedoed and sunk in the Atlantic Ocean 270 nautical miles (500 km) west by north of the Fastnet Rock (50°55′N 16°28′W﻿ / ﻿50.917°N 16.467°W﻿ / 50.917; -16.467) by SM U-43 ( Imperial German Navy). Her crew survived. |
| Torr Head | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 160 nautical miles (300 km) north west by north of the Fastnet Rock (52°10′N 14°00′W﻿ / ﻿52.167°N 14.000°W﻿ / 52.167; -14.000) by SM U-60 ( Imperial German Navy). Her crew survived. |

## 21 April

List of shipwrecks: 21 April 1917 :
| Ship | State | Description |
| Diadem | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 200 nautical miles (370 km) south west by west of the Fastnet Rock by SM U-50 ( Imperial German Navy). Her crew survived. |
| Emile et Charlotte | France | World War I: The fishing vessel was sunk in the Bay of Biscay north east of the Île d'Yeu, Vendée by SM UC-21 ( Imperial German Navy). Her crew survived. |
| SMS G42 | Imperial German Navy | World War I: Battle of Dover Strait: The Großes Torpedoboot 1913-class torpedo boat was rammed and sunk in the Strait of Dover by HMS Broke ( Royal Navy) with the loss of 36 of her 83 crew. |
| SMS G85 | Imperial German Navy | World War I: Battle of Dover Strait: The Großes Torpedoboot 1913-class torpedo boat was torpedoed and sunk in the Strait of Dover by HMS Swift ( Royal Navy). |
| Gerda | Norway | World War I: The coaster was sunk in the North Sea 5 nautical miles (9.3 km) south west of Sumburgh Head, Shetland Islands, United Kingdom by SM UC-55 ( Imperial German Navy). Her crew survived. |
| Giosue | Italy | World War I: The brigantine was shelled and sunk in the Mediterranean Sea off Tunis, Tunisia (37°53′N 10°06′E﻿ / ﻿37.883°N 10.100°E﻿ / 37.883; 10.100) by SM U-32 ( Imperial German Navy). |
| Hercules | United States | The steam lighter was sunk in a collision with City of Atlanta (flag unknown) in the North Channel in the harbor at Boston, Massachusetts. |
| Jedburgh | United Kingdom | World War I: The trawler was scuttled in the North Sea (35 nautical miles (65 km) north north west of Foula by SM UC-33 ( Imperial German Navy). Her crew survived. |
| Peik | Norway | World War I: The coaster was sunk in the North Sea 10 nautical miles (19 km) north of Coquet Island, Northumberland, United Kingdom by SM UC-44 ( Imperial German Navy). Her crew survived. |
| Pontiac | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 56 nautical miles (104 km) south west of the Fastnet Rock (50°31′N 10°09′W﻿ / ﻿50.517°N 10.150°W﻿ / 50.517; -10.150) by SM U-53 ( Imperial German Navy) with the loss of two crew. |
| Sebek | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 145 nautical miles (269 km) north west of Tory Island, County Donegal (56°12′N 12°20′W﻿ / ﻿56.200°N 12.333°W﻿ / 56.200; -12.333) by SM U-70 ( Imperial German Navy) with the loss of a crew member. |
| Skjold | Norway | World War I: The barque was shelled and sunk in the Atlantic Ocean west north west of the Fastnet Rock (51°41′N 14°37′W﻿ / ﻿51.683°N 14.617°W﻿ / 51.683; -14.617) by SM U-61 ( Imperial German Navy). Her crew survived. |
| Telena | United Kingdom | World War I: The tanker was torpedoed and sunk in the Atlantic Ocean 170 nautical miles (310 km) west north west of the Fastnet Rock (51°16′N 14°00′W﻿ / ﻿51.267°N 14.000°W﻿ / 51.267; -14.000) by SM U-61 ( Imperial German Navy). Her crew survived. |
| SM UC-30 | Imperial German Navy | World War I: The Type UC II submarine struck a mine and sank in the North Sea 66 nautical miles (122 km) west of Nymindegab, Denmark with the loss of all 26 crew. |
| Ville de Dieppe | France | World War I: The barque was shelled and sunk in the Bay of Biscay west of the Île d'Oléron, Charente-Maritime (45°59′N 1°52′W﻿ / ﻿45.983°N 1.867°W﻿ / 45.983; -1.867) by SM UC-21 ( Imperial German Navy). Her crew survived and were rescued by a French Navy submarine. |
| Warrior | United Kingdom | World War I: The cargo ship struck a mine and sank in the Mediterranean Sea 7 nautical miles (13 km) north east of the Fratelli Rocks, Tunisia with the loss of a crew member. |
| Yeovil | United Kingdom | World War I: The trawler was scuttled in the North Sea 35 nautical miles (65 km) north north west of Foula by SM UC-33 ( Imperial German Navy) with the loss of a crew member. |

## 22 April

List of shipwrecks: 22 April 1917 :
| Ship | State | Description |
| Arethusa | United Kingdom | World War I: The barque was scuttled in the Atlantic Ocean 15 nautical miles (28 km) north west of Eagle Island, County Mayo by SM UC-66 ( Imperial German Navy). Her crew survived. |
| Blaatind | Norway | World War I: The cargo ship was sunk in the Tyrrhenian Sea 30 nautical miles (56 km) off Civitavecchia, Lazio, Italy (42°28′N 10°59′E﻿ / ﻿42.467°N 10.983°E﻿ / 42.467; 10.983) by SM U-33 ( Imperial German Navy) with the loss of two crew. |
| Capenor | United Kingdom | World War I: The cargo ship struck a mine and sank in the Bay of Biscay off La Pallice, Charente-Maritime, France (46°06′N 1°17′W﻿ / ﻿46.100°N 1.283°W﻿ / 46.100; -1.283). Her crew survived. |
| Giskø | Norway | World War I: The cargo ship was sunk in the North Sea (61°03′N 3°28′E﻿ / ﻿61.050°N 3.467°E﻿ / 61.050; 3.467 by SM U-21 ( Imperial German Navy). Her crew survived. |
| Godø | Norway | World War I: The coaster was sunk in the North Sea 16 nautical miles (30 km) east of the Shetland Islands, United Kingdom by SM UC-41 ( Imperial German Navy). Her crew survived. |
| Maria S. | Italy | World War I: The sailing vessel was sunk in the Tyrrhenian Sea off Civitavecchia by SM U-33 ( Imperial German Navy). |
| HMML 431 | Royal Navy | The motor launch was lost on this date. |
| Neepawah | Canada | World War I: The cargo ship was scuttled in the Atlantic Ocean 120 nautical miles (220 km) south west of the Bishop Rock, Isles of Scilly, United Kingdom by SM U-53 ( Imperial German Navy). Her crew survived. |
| Nightingale | United Kingdom | World War I: The fishing vessel was scuttled in the North Sea 26 nautical miles (48 km) south of Aberdeen by SM UC-44 ( Imperial German Navy). Her crew survived. |
| Percy Birdsall | United States | World War I: The schooner was shelled and sunk in the Bay of Biscay off the Gironde Estuary by SM UC-21 ( Imperial German Navy). Her crew survived. |
| Theodore William | Norway | World War I: The cargo ship was sunk in the North Sea 40 nautical miles (74 km) off the Shetland Islands (60°45′N 0°13′E﻿ / ﻿60.750°N 0.217°E﻿ / 60.750; 0.217) by SM U-21 ( Imperial German Navy). Her crew survived. |
| Unione | Italy | World War I: The brigantine was sunk in the Tyrrhenian Sea off Civitavecchia (42°01′N 10°54′E﻿ / ﻿42.017°N 10.900°E﻿ / 42.017; 10.900) by SM U-33 ( Imperial German Navy). |
| Valerie | Norway | World War I: The barque was shelled and sunk in the Bay of Biscay 30 nautical miles (56 km) west of the Cordouan Lighthouse, Charente Maritime by SM UC-21 ( Imperial German Navy). Her crew survived. |
| Vestelv | Norway | World War I: The full-rigged ship was scuttled in the Atlantic Ocean 14 nautical miles (26 km) off Tory Island, County Donegal, United Kingdom by SM U-93 ( Imperial German Navy). Her crew survived. |
| Woodward Abrahams | United States | World War I: The three-masted schooner was captured and scuttled with explosives in the Atlantic Ocean 407 nautical miles (754 km) west of the Fastnet Rock by SM U-43 ( Imperial German Navy). Her crew survived. |

## 23 April

List of shipwrecks: 23 April 1917 :
| Ship | State | Description |
| Acadian | Norway | World War I: The barque was scuttled in the Atlantic Ocean 65 nautical miles (120 km) north west of Tory Island, County Donegal, United Kingdom (55°44′N 9°30′W﻿ / ﻿55.733°N 9.500°W﻿ / 55.733; -9.500) by SM U-52 ( Imperial German Navy). Her crew survived. |
| Auriac | United Kingdom | World War I: The coaster was shelled and sunk in the North Sea 5 nautical miles (9.3 km) east south east of St Abb's Head, Berwickshire by SM UC-44 ( Imperial German Navy) with the loss of a crew member. |
| Bandiera E. Moro | United Kingdom | World War I: The cargo ship was sunk in the Atlantic Ocean 50 nautical miles (93 km) west of Tangier, Morocco by SM U-35 ( Imperial German Navy). Her crew survived. |
| Baron Stjernblad | Denmark | World War I: The coaster was sunk in the North Sea 5 nautical miles (9.3 km) north east of Eyemouth, Berwickshire by SM UC-44 ( Imperial German Navy). Her crew survived. |
| Boro | Italy | World War I: The sailing vessel was sunk in the Aegean Sea east of Rhodes, Greece by SM UB-42 ( Imperial German Navy). |
| Calluna | Denmark | World War I: The barque was sunk in the Atlantic Ocean south west of the Isles of Scilly, United Kingdom (48°51′N 8°38′W﻿ / ﻿48.850°N 8.633°W﻿ / 48.850; -8.633) by SM U-61 ( Imperial German Navy). Her crew survived. |
| Cenobic | Belgium | World War I: The fishing vessel struck a mine and sank in the English Channel off Le Tréport, Seine-Inférieure, France with the loss of four of her crew. |
| Dykland | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 200 nautical miles (370 km) west north west of the Fastnet Rock by SM U-50 ( Imperial German Navy). Her crew survived. |
| Eptapyrgion | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 150 nautical miles (280 km) west of the Isles of Scilly by SM U-53 ( Imperial German Navy). Her crew survived. |
| Imataka | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Irish Sea 15 nautical miles (28 km) south south west of the Daunt Rock by SM UC-47 ( Imperial German Navy). Her crew survived. |
| Lena | United Kingdom | World War I: The cargo ship was sunk in the Atlantic Ocean south west of the Isles of Scilly (48°45′N 8°30′W﻿ / ﻿48.750°N 8.500°W﻿ / 48.750; -8.500) by SM U-61 ( Imperial German Navy) with the loss of all 25 crew. |
| HMT Lena Melling | Royal Navy | World War I: The naval trawler struck a mine and sank in the North Sea off the Elbow Lightship ( United Kingdom) (51°22′30″N 1°33′30″E﻿ / ﻿51.37500°N 1.55833°E﻿ / 51.37500; 1.55833) with the loss of eleven of her crew. |
| Marita | Norway | World War I: The full-rigged ship was sunk in the Atlantic Ocean 110 nautical miles (200 km) west of St. Kilda, Inverness-shire, United Kingdom (58°21′N 10°34′W﻿ / ﻿58.350°N 10.567°W﻿ / 58.350; -10.567) by SM U-82 ( Imperial German Navy). Her crew survived. |
| Oswald | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 200 nautical miles (370 km) south west of the Fastnet Rock by SM U-50 ( Imperial German Navy). Her crew survived. |
| HMT Rose II | Royal Navy | World War I: The naval trawler struck a mine and sank in the Irish Sea off Belfast, County Down (54°44′N 5°38′W﻿ / ﻿54.733°N 5.633°W﻿ / 54.733; -5.633) with the loss of six of her crew. |
| Savio | Italy | World War I: The cargo ship was sunk in the Bay of Biscay 20 nautical miles (37 km) south east of Belle Île, Morbihan, France by SM UC-36 ( Imperial German Navy). Her crew survived. |
| Scot | Denmark | World War I: The cargo ship was sunk in the North Sea 12 nautical miles (22 km) east by north of St Abb's Head (56°02′N 1°46′W﻿ / ﻿56.033°N 1.767°W﻿ / 56.033; -1.767) by SM UC-44 ( Imperial German Navy). Her crew survived. |
| Stegg | Norway | World War I: The coaster was sunk in the North Sea (60 nautical miles (110 km) east of Lerwick, Shetland Islands, United Kingdom (60°41′N 0°37′E﻿ / ﻿60.683°N 0.617°E﻿ / 60.683; 0.617) by SM UC-41 ( Imperial German Navy) with the loss of a crew member. |
| Svanen | Denmark | World War I: The full-rigged ship was sunk in the Atlantic Ocean 30 nautical miles (56 km) west north west of Muckle Flugga, Shetland Islands by SM U-60 ( Imperial German Navy) with the loss of two crew. |

## 24 April

List of shipwrecks: 24 April 1917 :
| Ship | State | Description |
| Amulree | United Kingdom | World War I: The barque was sunk in the Atlantic Ocean 50 nautical miles (93 km) north by east of Tory Island, County Donegal (56°10′N 8°40′W﻿ / ﻿56.167°N 8.667°W﻿ / 56.167; -8.667) by SM U-81 ( Imperial German Navy). Her crew survived. |
| Anglesea | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 160 nautical miles (300 km) south west of the Bishop Rock, Isles of Scilly (48°56′N 10°17′W﻿ / ﻿48.933°N 10.283°W﻿ / 48.933; -10.283) by SM U-53 ( Imperial German Navy). Her crew survived. |
| Barnton | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Bay of Biscay 40 nautical miles (74 km) west by south of Pointe de Chassiron, Île d'Oléron, Charente-Maritime, France (45°40′N 2°12′W﻿ / ﻿45.667°N 2.200°W﻿ / 45.667; -2.200) by SM UC-21 ( Imperial German Navy) with the loss of fourteen of her crew. |
| Bien Aime Prof. Luigi | United Kingdom | World War I: The sailing vessel was scuttled in the Atlantic Ocean off Cape St. Vincent, Portugal (36°53′N 9°10′W﻿ / ﻿36.883°N 9.167°W﻿ / 36.883; -9.167) by SM U-35 ( Imperial German Navy). |
| Clan Galbraith | Norway | World War I: The four-masted barque was scuttled in the Atlantic Ocean west of Ireland (52°30′N 14°00′W﻿ / ﻿52.500°N 14.000°W﻿ / 52.500; -14.000) by SM U-70 ( Imperial German Navy). Her crew survived. |
| Cordelia | Sweden | World War I: The barque was shelled and sunk in the Atlantic Ocean (51°08′N 15°13′W﻿ / ﻿51.133°N 15.217°W﻿ / 51.133; -15.217﻿ (Cordelia)) by SM U-43 ( Imperial German Navy). Her crew survived. |
| Eos | Denmark | World War I: The three-masted schooner was sunk in the Atlantic Ocean west of Ireland (52°40′N 14°45′W﻿ / ﻿52.667°N 14.750°W﻿ / 52.667; -14.750) by SM U-70 ( Imperial German Navy). Her crew survived. |
| Ferndene | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 150 nautical miles (280 km) west of the Bishop Rock by SM U-53 ( Imperial German Navy) with the loss of nine crew. |
| Heather | United Kingdom | World War I: The drifter was scuttled in the Atlantic Ocean 14 nautical miles (26 km) west by north of the Bishop Rock (49°52′N 6°48′W﻿ / ﻿49.867°N 6.800°W﻿ / 49.867; -6.800) by SM UC-47 ( Imperial German Navy). Her crew survived. |
| Kenilworth | United Kingdom | World War I: The cargo ship struck a mine and sank in the Atlantic Ocean 3.5 nautical miles (6.5 km) west by south of Point St. Mathieu, Finistère, France (48°17′N 4°48′W﻿ / ﻿48.283°N 4.800°W﻿ / 48.283; -4.800) by SM UC-36 ( Imperial German Navy). Her crew survived. |
| La Providence | France | World War I: The schooner was sunk in the Loire Estuary by SM UC-36 ( Imperial German Navy). |
| HMT Margate | Royal Navy | World War I: The naval trawler was shelled and sunk in the North Sea off Spurn Head, Yorkshire by SM UC-50 ( Imperial German Navy) with the loss of thirteen of her crew. |
| Marie Blanche | France | World War I: The sailing vessel was sunk in the English Channel 30 nautical miles (56 km) north of Cherbourg, Seine Maritime (50°08′N 1°37′W﻿ / ﻿50.133°N 1.617°W﻿ / 50.133; -1.617) by SM UB-32 ( Imperial German Navy) with the loss of a crew member. |
| Mayfly | United Kingdom | World War I: The trawler was shelled and sunk in the North Sea 75 nautical miles (139 km) north east by east of Scarborough, Yorkshire by SM UC-50 ( Imperial German Navy) with the loss of three of her crew. |
| Metropolis | Norway | World War I: The four-masted barque was scuttled in the Atlantic Ocean south west of the Isles of Scilly (48°30′N 11°15′W﻿ / ﻿48.500°N 11.250°W﻿ / 48.500; -11.250) by SM U-61 ( Imperial German Navy). Her crew survived. |
| Minister Tak van Poortvliet | Netherlands | World War I: The cargo ship was torpedoed and sunk in the North Sea 20 nautical miles (37 km) off IJmuiden, North Holland (52°42′N 3°32′E﻿ / ﻿52.700°N 3.533°E﻿ / 52.700; 3.533) by SM UB-10 ( Imperial German Navy). |
| Nordsøen | Denmark | World War I: The cargo ship was scuttled in the Atlantic Ocean off Cape St. Vincent (37°02′N 8°54′W﻿ / ﻿37.033°N 8.900°W﻿ / 37.033; -8.900) by SM U-35 ( Imperial German Navy). Her crew survived. |
| Plutus | United Kingdom | World War I: The collier was torpedoed and sunk in the Atlantic Ocean 9 nautical miles (17 km) north West of Trevose Head, Cornwall (50°41′N 5°07′W﻿ / ﻿50.683°N 5.117°W﻿ / 50.683; -5.117) by SM UC-47 ( Imperial German Navy) with the loss if a crew member. |
| Thistleard | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 135 nautical miles (250 km) west north west of Tory Island (55°10′N 12°00′W﻿ / ﻿55.167°N 12.000°W﻿ / 55.167; -12.000) by SM U-82 ( Imperial German Navy). Her crew survived. |
| Torvore | Norway | World War I: The cargo ship was sunk in the Atlantic Ocean off Cape St. Vincent (37°00′N 8°54′W﻿ / ﻿37.000°N 8.900°W﻿ / 37.000; -8.900) by SM U-35 ( Imperial German Navy). Her crew survived. |
| Upton Castle | United Kingdom | World War I: The trawler was scuttled in the North Sea 60 nautical miles (110 km) east of the Longstone Lighthouse, Northumberland by SM UC-29 ( Imperial German Navy). Her crew survived. |
| Valkyrian | Sweden | World War I: The three-masted schooner was shelled and sunk in the Atlantic Ocean south west of Ireland by SM U-70 ( Imperial German Navy) with the loss of a crew member. |
| Vestdal | Norway | World War I: The full-rigged ship was shelled and sunk in the Atlantic Ocean 280 nautical miles (520 km) west of Ireland (52°19′N 15°18′W﻿ / ﻿52.317°N 15.300°W﻿ / 52.317; -15.300) by SM U-70 ( Imperial German Navy) with the loss of a crew member. |
| Vilhelm Krag | Norway | World War I: The cargo ship was sunk in the Atlantic Ocean 5 nautical miles (9.3 km) west of the Pildale Lighthouse, Portugal (37°03′N 8°44′W﻿ / ﻿37.050°N 8.733°W﻿ / 37.050; -8.733) by SM U-35 ( Imperial German Navy). Her crew survived. |

## 25 April

List of shipwrecks: 25 April 1917 :
| Ship | State | Description |
| Abosso | United Kingdom | World War I: The passenger ship was torpedoed and sunk in the Atlantic Ocean 180 nautical miles (330 km) west by north of the Fastnet Rock (57°10′N 14°58′W﻿ / ﻿57.167°N 14.967°W﻿ / 57.167; -14.967) by SM U-43 ( Imperial German Navy) with the loss of 65 lives. |
| Baigorry | France | World War I: The cargo ship was scuttled in the Bay of Biscay 15 nautical miles (28 km) south south east of Belle Île, Morbihan (47°04′N 2°54′W﻿ / ﻿47.067°N 2.900°W﻿ / 47.067; -2.900) by SM UC-21 ( Imperial German Navy). Her crew survived. |
| Ballarat | United Kingdom | World War I: The troopship was torpedoed and damaged in the Atlantic Ocean 24 nautical miles (44 km) south by west of the Wolf Rock, Cornwall (49°33′N 5°36′W﻿ / ﻿49.550°N 5.600°W﻿ / 49.550; -5.600) by SM UB-32 ( Imperial German Navy). She was taken under tow but consequently sank (49°51′45″N 5°19′00″W﻿ / ﻿49.86250°N 5.31667°W﻿ / 49.86250; -5.31667). Her crew and the troops on board survived. |
| E. G. Stoddard | United States | The barge sank in the Atlantic Ocean in an unknown location. |
| Elisabeth | Denmark | World War I: An attempt was made to scuttle the schooner in the Atlantic Ocean 70 to 80 nautical miles (130 to 150 km) south west of Ireland (51°02′N 12°05′W﻿ / ﻿51.033°N 12.083°W﻿ / 51.033; -12.083) by SM U-53 ( Imperial German Navy). The derelict ship was discovered 180 nautical miles (330 km)) north west of the Fastnet Rock on 30 April by SM U-81 ( Imperial German Navy), which also attempted to scuttle her, but she was kept afloat by her cargo of Pitch Pine. Although declared a constructive total loss, she was subsequently repaired and returned to service. |
| Elizabeth | Netherlands | World War I: The lugger was scuttled in the North Sea (52°36′N 3°40′E﻿ / ﻿52.600°N 3.667°E﻿ / 52.600; 3.667) by SM UB-10 ( Imperial German Navy). Her crew survived. |
| Este | Denmark | World War I: The barque was sunk in the North Sea 50 nautical miles (93 km) west of Egerø, Norway (58°25′N 3°48′E﻿ / ﻿58.417°N 3.800°E﻿ / 58.417; 3.800) by SM UB-34 ( Imperial German Navy). Her crew survived. |
| Étendard | French Navy | World War I: The Branlebas-class destroyer was torpedoed and sunk by an Imperial German Navy destroyer in the North Sea off Dunquerque, Nord, France, with the loss of all hands. |
| Glenesk | Norway | World War I: The barque was scuttled in the Atlantic Ocean 75 nautical miles (139 km) west north west of Eagle Island, County Mayo, United Kingdom by SM U-81 ( Imperial German Navy). Her crew survived. |
| Havila | Denmark | World War I: The barque was sunk on the Atlantic Ocean 15 nautical miles (28 km) east north east of North Rona, United Kingdom by SM U-58 ( Imperial German Navy). Her crew survived. |
| Hawthornbank | Denmark | World War I: The barque was sunk in the Atlantic Ocean 35 nautical miles (65 km) north by east of North Rona by SM U-58 ( Imperial German Navy) with the loss of nine crew. |
| Heathfield | Norway | World War I: The barque was scuttled in the Atlantic Ocean 53 nautical miles (98 km) west by north of Eagle Island by SM U-81 ( Imperial German Navy). Her crew survived. |
| Hesperides | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 130 nautical miles (240 km) north west of the Fastnet Rock (52°00′N 13°50′W﻿ / ﻿52.000°N 13.833°W﻿ / 52.000; -13.833) by SM U-69 ( Imperial German Navy) with the loss of a crew member. |
| Hirondelle | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Bay of Biscay 13 nautical miles (24 km) south by east of Belle Île, Morbihan, France by SM UC-36 ( Imperial German Navy). Her crew survived. |
| Invermay | United Kingdom | World War I: The barque was scuttled in the Atlantic Ocean 40 nautical miles (74 km) north west by north of Eagle Island (54°40′N 11°00′W﻿ / ﻿54.667°N 11.000°W﻿ / 54.667; -11.000) by SM U-81 ( Imperial German Navy). Her crew survived. |
| Laura | United Kingdom | World War I: The schooner was set afire and sunk in the Atlantic Ocean 150 nautical miles (280 km) west north west of the Fastnet Rock (51°20′N 13°30′W﻿ / ﻿51.333°N 13.500°W﻿ / 51.333; -13.500) by SM U-53 ( Imperial German Navy). Her crew survived. |
| Hackensack | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 180 nautical miles (330 km) south west of the Fastnet Rock by SM U-82 ( Imperial German Navy) with the loss of six of her crew. |
| Sokoto | Denmark | World War I: The barque was sunk in the Atlantic Ocean 15 nautical miles (28 km) north east by north of North Rona by SM U-58 ( Imperial German Navy). Her crew survived. |
| Swanmore | United Kingdom | World War I: The cargo ship was shelled and damaged in the Atlantic Ocean 230 nautical miles (430 km) west north west of the Fastnet Rock by SM U-43 and SM U-93 (both Imperial German Navy) She was then torpedoed and sunk by SM U-50 ( Imperial German Navy) with the loss of eleven crew. |

## 26 April

List of shipwrecks: 26 April 1917 :
| Ship | State | Description |
| Active | United Kingdom | World War I: The trawler was scuttled in the North Sea 65 nautical miles (120 km) east by south of the Longstone Lighthouse by SM UC-50 ( Imperial German Navy). Her crew survived. |
| Agnes Cairns | United Kingdom | World War I: The sailing vessel was scuttled in the English Channel 8 nautical miles (15 km) north east of Alderney, Channel Islands by SM UC-65 ( Imperial German Navy). Her crew survived. |
| Aigle | France | World War I: The brigantine was scuttled in the English Channel 11 nautical miles (20 km) south west of Start Point, Devon, United Kingdom by SM UC-47 ( Imperial German Navy). |
| Alhama | United Kingdom | World War I: The cargo ship struck a mine and sank in the English Channel off Calais, Pas-de-Calais, France. Her crew survived. |
| Amsteldijk | Netherlands | World War I: The trawler was sunk in the North Sea off the Haaks Lightship ( Netherlands) (52°56′N 4°10′E﻿ / ﻿52.933°N 4.167°E﻿ / 52.933; 4.167) by SM UC-63 ( Imperial German Navy). Her crew were rescued by the trawler Voorbode ( Netherlands. |
| Athole | United Kingdom | World War I: The auxiliary ketch was shelled and sunk in the English Channel 20 nautical miles (37 km) south of the Owers Lightship ( United Kingdom) by SM UC-65 ( Imperial German Navy). Her crew survived. |
| Augusta | Italy | The barque was scuttled in the Mediterranean Sea north east of Cap Bon, Tunisia (37°22′N 11°31′E﻿ / ﻿37.367°N 11.517°E﻿ / 37.367; 11.517) by SM UC-27 ( Imperial German Navy). |
| Boy Dennis | United Kingdom | World War I: The fishing vessel was scuttled in the English Channel 10 nautical miles (19 km) south south west of Start Point, Devon by SM UC-21 ( Imperial German Navy). Her crew survived. |
| Bretagne et Vendée | France | World War I: The sailing vessel was sunk in the English Channel off Alderney (49°51′N 2°04′W﻿ / ﻿49.850°N 2.067°W﻿ / 49.850; -2.067) by SM UC-65 ( Imperial German Navy). |
| Chertsey | United Kingdom | World War I: The collier was torpedoed and sunk in the Mediterranean Sea 4 nautical miles (7.4 km) north of Algiers, Algeria (36°52′N 3°05′W﻿ / ﻿36.867°N 3.083°W﻿ / 36.867; -3.083) by SM UC-67 ( Imperial German Navy). Her crew survived. |
| Ehrglis | Russia | World War I: The sailing vessel was set afire and sunk in the Atlantic Ocean (51°50′N 17°49′W﻿ / ﻿51.833°N 17.817°W﻿ / 51.833; -17.817) by SM U-43 ( Imperial German Navy). |
| Gennarino | Italy | World War I: The three-masted schooner was scuttled in the Mediterranean Sea off Cap Bon (37°26′N 11°26′E﻿ / ﻿37.433°N 11.433°E﻿ / 37.433; 11.433) by SM UC-27 ( Imperial German Navy). |
| Harflete | United Kingdom | World War I: The cargo ship was torpedoed, shelled and sunk in the Atlantic Ocean 200 nautical miles (370 km) north west by west of the Fastnet Rock (51°54′N 14°48′W﻿ / ﻿51.900°N 14.800°W﻿ / 51.900; -14.800) by SM U-70 ( Imperial German Navy) with the loss of a crew member. |
| Hekla | Norway | World War I: The three-masted schooner was sunk in the Atlantic Ocean 120 nautical miles (220 km) north west of the Slyne Head Lighthouse, County Galway, United Kingdom by SM U-53 ( Imperial German Navy). Her crew survived. |
| Hektoria | Norway | World War I: The cargo ship was sunk in the Atlantic Ocean (50°38′N 18°40′W﻿ / ﻿50.633°N 18.667°W﻿ / 50.633; -18.667) by SM U-43 ( Imperial German Navy). Her crew survived. |
| John Lockett | Norway | World War I: The barque was scuttled in the English Channel 25 nautical miles (46 km) south of The Lizard, Cornwall, United Kingdom (49°32′N 5°05′W﻿ / ﻿49.533°N 5.083°W﻿ / 49.533; -5.083) by SM UC-47 ( Imperial German Navy). Her crew survived. |
| Kong Oscar II | Norway | World War I: The sailing vessel was sunk in the Seine Estuary by SM UB-38 ( Imperial German Navy). Her crew survived. |
| Monitor | United Kingdom | World War I: The schooner was scuttled in the Mediterranean Sea 20 nautical miles (37 km) south by east of Cap d'Antibes, Alpes-Maritimes, France (43°11′N 7°52′E﻿ / ﻿43.183°N 7.867°E﻿ / 43.183; 7.867) by SM U-33 ( Imperial German Navy). Her crew survived. |
| HMT Plantin | Royal Navy | World War I: The naval trawler struck a mine and sank in the English Channel 3 nautical miles (5.6 km) east of Anvil Point, Dorset with the loss of nine of her crew. |
| HMT Repro | Royal Navy | World War I: The naval trawler struck a mine and sank in the North Sea off Tod Head, Aberdeenshire (56°53′N 2°08′W﻿ / ﻿56.883°N 2.133°W﻿ / 56.883; -2.133) with the loss of thirteen of her crew. |
| Rio Lages | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 155 nautical miles (287 km) north west by north of the Fastnet Rock (51°38′N 12°52′W﻿ / ﻿51.633°N 12.867°W﻿ / 51.633; -12.867) by SM U-69 ( Imperial German Navy) with the loss of three of her crew. |
| SMS Senator Sachse | Imperial German Navy | The Vorpostenboot was lost on this date. |
| Telefon | Norway | World War I: The sailing vessel was sunk in the North Sea (54°57′N 1°48′E﻿ / ﻿54.950°N 1.800°E﻿ / 54.950; 1.800) by SM UC-50 ( Imperial German Navy). Her crew survived. |
| Vauxhall | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 110 nautical miles (200 km) north west by west of the Fastnet Rock (51°45′N 12°30′W﻿ / ﻿51.750°N 12.500°W﻿ / 51.750; -12.500) by SM U-69 ( Imperial German Navy) with the loss of two of her crew. |
| No. 1 | Imperial Russian Navy | The submarine sank in a storm. She was refloated in the summer but was declared a constructive total loss. |

## 27 April

List of shipwrecks: 27 April 1917 :
| Ship | State | Description |
| HMT Agile | Royal Navy | World War I: The naval trawler struck a mine and sank in the North Sea 3 nautical miles (5.6 km) east of the Sunk Lightship ( United Kingdom) with the loss of three of her crew. |
| HMS Alfalfa | Royal Navy | World War I: The collier was sunk in the Atlantic Ocean 30 nautical miles (56 km) off the Isles of Scilly (49°15′N 6°20′W﻿ / ﻿49.250°N 6.333°W﻿ / 49.250; -6.333) by SM UB-32 ( Imperial German Navy) with the loss of 30 crew. |
| Beemah | United Kingdom | World War I: The collier was torpedoed and sunk in the Atlantic Ocean 30 nautical miles (56 km) south west by south of the Bishop Rock, Isles of Scilly by SM UB-32 ( Imperial German Navy) with the loss of three of her crew. |
| Burrowa | United Kingdom | The four-masted barque was scuttled in the Atlantic Ocean 60 nautical miles (110 km) west of the Isles of Scilly by SM UC-65 ( Imperial German Navy). Her crew survived. |
| Dromore | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 140 nautical miles (260 km) west of Tory Island, County Donegal (56°30′N 11°40′W﻿ / ﻿56.500°N 11.667°W﻿ / 56.500; -11.667) by SM U-58 ( Imperial German Navy). Her crew survived. |
| Dunmore Head | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 135 nautical miles (250 km) west of Tory Island (56°12′N 12°00′W﻿ / ﻿56.200°N 12.000°W﻿ / 56.200; -12.000) by SM U-62 ( Imperial German Navy). Her crew survived. |
| Glencluny | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 4 nautical miles (7.4 km) north west of Cape Sigli, Algeria by SM UC-67 ( Imperial German Navy) with the loss of four of her crew. |
| Good Hope | United Kingdom | World War I: The ketch was shelled and sunk in the English Channel 15 nautical miles (28 km) north north west of Barfleur, Manche, France by SM UC-72 ( Imperial German Navy). Her crew survived. |
| Inveramsay | United Kingdom | World War I: The barque was shelled and sunk in the Atlantic Ocean north west of Ireland (56°00′N 11°30′W﻿ / ﻿56.000°N 11.500°W﻿ / 56.000; -11.500) by SM U-62 ( Imperial German Navy) with the loss of all hands. |
| Jessie | United Kingdom | World War I: The schooner was scuttled in the English Channel 7 nautical miles (13 km) west of Portland Bill, Dorset by SM UB-38 ( Imperial German Navy). Her crew survived. |
| Karuma | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 5 nautical miles (9.3 km) north of Cape Sigle (37°09′N 4°50′E﻿ / ﻿37.150°N 4.833°E﻿ / 37.150; 4.833) by SM UC-67 ( Imperial German Navy) with the loss of two of her crew. |
| Langfond | Norway | World War I: The cargo ship was sunk in the Atlantic Ocean (58°49′N 10°53′W﻿ / ﻿58.817°N 10.883°W﻿ / 58.817; -10.883) by SM U-58 ( Imperial German Navy). Her crew survived. |
| Mafalda | Italy | World War I: The brigantine was scuttled in the Mediterranean Sea (43°06′N 7°40′E﻿ / ﻿43.100°N 7.667°E﻿ / 43.100; 7.667) by SM U-33 ( Imperial German Navy). |
| Manchester Citizen | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 240 nautical miles (440 km) north west of the Fastnet Rock (52°30′N 15°40′W﻿ / ﻿52.500°N 15.667°W﻿ / 52.500; -15.667) by SM U-70 ( Imperial German Navy) with the loss of a crew member. |
| Margaret B. Rouss | United States | The schooner was captured and scuttled by burning in the Mediterranean Sea 42 nautical miles (78 km) south of Monaco by SM U-33 ( Imperial German Navy). Her crew survived. |
| Nidelven | Norway | World War I: The cargo ship struck a mine and sank in the North Sea 10 nautical miles (19 km) north east of Coquet Island, Northumberland, United Kingdom (55°29′N 1°27′W﻿ / ﻿55.483°N 1.450°W﻿ / 55.483; -1.450) with the loss of three of her crew. |
| Ragnhild | Norway | World War I: The cargo ship struck a mine and sank in the North Sea 10 nautical miles (19 km) north of the mouth of the River Tyne (55°16′N 1°22′W﻿ / ﻿55.267°N 1.367°W﻿ / 55.267; -1.367) with the loss of two of her crew. |
| Uranus | Italy | World War I: The cargo ship was sunk in the Atlantic Ocean 60 nautical miles (110 km) west of the Fastnet Rock by SM U-81 ( Imperial German Navy). |
| Verjø | Norway | World War I: The cargo ship was sunk in the Atlantic Ocean 10 nautical miles (19 km) north of the Stiff Lighthouse, Ouessant, Finistère, France by SM UC-36 ( Imperial German Navy) with the loss of ten of her crew. |

## 28 April

List of shipwrecks: 28 April 1917 :
| Ship | State | Description |
| Alu Mendi | Spain | World War I: The cargo ship was sunk in the Atlantic Ocean 12 nautical miles (22 km) south south east of the Tuskar Rock, Ireland by SM UC-65 ( Imperial German Navy). |
| Anne Marie | Norway | World War I: The sailing vessel was sunk in the Atlantic Ocean 160 nautical miles (300 km) north west of Ireland by SM U-70 ( Imperial German Navy). Her crew survived. |
| Bullmouth | United Kingdom | World War I: The tanker was torpedoed and sunk in the Atlantic Ocean 125 nautical miles (232 km) north west by west of Tory Island, County Donegal (58°34′N 10°50′W﻿ / ﻿58.567°N 10.833°W﻿ / 58.567; -10.833) by SM U-58 ( Imperial German Navy). Her crew survived. |
| Carmelo Padre | Italy | World War I: The sailing vessel was sunk in the Strait of Messina by SM U-63 ( Imperial German Navy). |
| Condor | Russia | World War I: The cargo ship was sunk in the Atlantic Ocean 90 nautical miles (170 km) west of Ouessant, Finistère, France by SM UC-36 ( Imperial German Navy). |
| Diana | Denmark | World War I: The barquentine was damaged in the Atlantic Ocean 200 nautical miles (370 km) south west of the Fastnet Rock (49°40′N 13°10′W﻿ / ﻿49.667°N 13.167°W﻿ / 49.667; -13.167) by SM U-93 ( Imperial German Navy). She was subsequently towed into Queenstown, County Cork, United Kingdom where she was declared a total loss. Diana was later repaired and returned to service. |
| Giuseppe Padre I | Italy | World War I: The sailing vessel was sunk in the Strait of Messina by SM U-63 ( Imperial German Navy). |
| Giuseppina G. | Italy | World War I: The sailing vessel was sunk in the Strait of Messina by SM U-63 ( Imperial German Navy). |
| I Due Fratelli P. | Italy | World War I: The sailing vessel was sunk in the Strait of Messina by SM U-63 ( Imperial German Navy). |
| Jose de Larrinaga | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 150 nautical miles (280 km) west north west of the Fastnet Rock (51°32′N 13°20′W﻿ / ﻿51.533°N 13.333°W﻿ / 51.533; -13.333) by SM U-81 ( Imperial German Navy) with the loss of twelve crew. |
| Juliette | France | World War I: The sailing vessel struck a mine and sank in the Mediterranean Sea off Mostaganem, Algeria. |
| Karonga | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Strait of Messina 2 nautical miles (3.7 km) south south east of Cape Schio, Italy by SM U-63 ( Imperial German Navy) with the loss of eighteen crew. Her captain was taken as a prisoner of war. |
| Lisetta | Italy | World War I: The fishing vessel was sunk in the Mediterranean Sea 8 nautical miles (15 km) west of the Îles Sanguinaires, France by SM U-33 ( Imperial German Navy). Her crew survived. |
| Medina | United Kingdom | World War I: The passenger ship was torpedoed and sunk in the English Channel off Start Point, Devon (50°15′N 3°30′W﻿ / ﻿50.250°N 3.500°W﻿ / 50.250; -3.500) by SM UB-31 ( Imperial German Navy). |
| Natale B. | Italy | World War I: The sailing vessel was sunk in the Strait of Messina by SM U-63 ( Imperial German Navy). |
| Niobe | Italy | World War I: The sailing vessel was sunk in the Mediterranean Sea off Malta by SM UC-37 ( Imperial German Navy). |
| Olga | Russia | World War I: The cargo ship was shelled and sunk in the Barents Sea 89 nautical miles (165 km) off the North Cape, Finnmark, Norway by SM U-45 ( Imperial German Navy). |
| Pontiac | United Kingdom | World War I: The cargo ship was sunk in the Mediterranean Sea 70 nautical miles (130 km) north east of Marsa Susa, Libya (34°04′N 22°06′E﻿ / ﻿34.067°N 22.100°E﻿ / 34.067; 22.100) by SM UC-74 ( Imperial German Navy) with the loss of a crew member. Four of the survivors were taken as prisoners of war. |
| Port Jackson | United Kingdom | World War I: The four-masted barque was torpedoed and sunk in the Atlantic Ocean 180 nautical miles (330 km) west by north of the Fastnet Rock (51°00′N 14°02′W﻿ / ﻿51.000°N 14.033°W﻿ / 51.000; -14.033) by SM U-67 ( Imperial German Navy) with the loss of fourteen crew. |
| Pursue | United Kingdom | World War I: The fishing vessel was scuttled in the English Channel 12 nautical miles (22 km) south west of Bolt Head, Devon by SM UB-32 ( Imperial German Navy). Her crew survived. |
| San Francesco Di Paola | Italy | World War I: The sailing vessel was sunk in the Strait of Messina by SM U-63 ( Imperial German Navy). |
| Teakwood | United Kingdom | World War I: The tanker was torpedoed and sunk in the Aegean Sea 26 nautical miles (48 km) south west by west of Sapientza, Greece (36°39′N 21°10′E﻿ / ﻿36.650°N 21.167°E﻿ / 36.650; 21.167) by SM U-14 ( Austro-Hungarian Navy). Her crew survived. |
| Terence | United Kingdom | World War I: The cargo ship was shelled and sunk in the Atlantic Ocean 150 nautical miles (280 km) west by north of the Fastnet Rock (52°40′N 12°55′W﻿ / ﻿52.667°N 12.917°W﻿ / 52.667; -12.917) by SM U-81 ( Imperial German Navy) with the loss of a crew member. |
| Vacuum | United States | World War I: The tanker was torpedoed and sunk in the Atlantic Ocean 120 nautical miles (220 km) west of Barra, Outer Hebrides, United Kingdom (57°20′N 10°10′W﻿ / ﻿57.333°N 10.167°W﻿ / 57.333; -10.167) by SM U-44 ( Imperial German Navy) with the loss of her captain and 23 crew. 21 crew were rescued. |

## 29 April

List of shipwrecks: 29 April 1917 :
| Ship | State | Description |
| Askepot | Norway | World War I: The full-rigged ship was scuttled in the Atlantic Ocean 125 nautical miles (232 km) west of the Isles of Scilly, United Kingdom (49°48′N 9°17′W﻿ / ﻿49.800°N 9.283°W﻿ / 49.800; -9.283) by SM U-21 ( Imperial German Navy). Her crew survived. |
| Bayonnais | France | World War I: The fishing vessel was scuttled in the Bay of Biscay off Guilvinec, Finistère by SM UC-72 ( Imperial German Navy) with the loss of all four crew. |
| Carbo I | Denmark | World War I: The cargo ship was sunk in the North Sea (55°56′N 2°06′E﻿ / ﻿55.933°N 2.100°E﻿ / 55.933; 2.100) by SM UC-29 ( Imperial German Navy). Her crew survived. |
| Comedian | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 200 nautical miles (370 km) west of the Bishop Rock, Isles of Scilly (48°06′N 10°45′W﻿ / ﻿48.100°N 10.750°W﻿ / 48.100; -10.750) by SM U-93 ( Imperial German Navy). Her crew survived. |
| Daleby | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 180 nautical miles (330 km) north west of the Fastnet Rock by SM U-70 ( Imperial German Navy) with the loss of 25 crew. |
| Dilston Castle | United Kingdom | World War I: The trawler was scuttled in the North Sea 16 nautical miles (30 km) east by south of Aberdeen (57°10′N 1°32′W﻿ / ﻿57.167°N 1.533°W﻿ / 57.167; -1.533) by SM UB-22 ( Imperial German Navy). Her crew survived. |
| Ellen Harrison | United Kingdom | World War I: The schooner was shelled and sunk in the English Channel 7 nautical miles (13 km) north west of Cherbourg, Seine-Inférieure, France by SM UB-32 ( Imperial German Navy). Her crew survived. |
| Eugènie et Lucie | France | World War I: The sailing vessel was sunk in the Bay of Biscay off Audierne, Finistère by SM UC-72 ( Imperial German Navy). |
| Frère des Cinq Soeurs | France | World War I: The sailing vessel was sunk in the Bay of Biscay off Audierne by SM UC-72 ( Imperial German Navy) Her crew survived. |
| Giuseppe Maria | Italy | World War I: The sailing vessel was sunk in the Strait of Sicily by SM UC-37 ( Imperial German Navy). |
| Hurlford | United Kingdom | The collier was wrecked in Gunna Sound, Scotland. |
| Ikbal | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 200 nautical miles (370 km) west by south of the Bishop Rock (48°34′N 12°35′W﻿ / ﻿48.567°N 12.583°W﻿ / 48.567; -12.583) by SM U-93 ( Imperial German Navy). Her crew survived, but three of them were taken as prisoners of war. |
| Mermaid | United Kingdom | World War I: The schooner was scuttled in the English Channel 18 nautical miles (33 km) south south west of Anvil Point, Devon by SM UB-32 ( Imperial German Navy). Her crew survived. |
| Petit Ernest | France | World War I: The fishing vessel was scuttled in the Bay of Biscay off Guilvinec by SM UC-72 ( Imperial German Navy) with the loss of all three crew. |
| Victoria | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the North Sea 5 nautical miles (9.3 km) north east by north of Scarborough, Yorkshire by SM UB-21 ( Imperial German Navy) with the loss of a crew member. |

## 30 April

List of shipwrecks: 30 April 1917 :
| Ship | State | Description |
| HMT Arfon | Royal Navy | World War I: The naval trawler struck a mine and sank in the English Channel off St Alban's Head, Dorset (50°30′N 2°10′W﻿ / ﻿50.500°N 2.167°W﻿ / 50.500; -2.167) with the loss of ten of her crew. |
| Argo | United Kingdom | World War I: The trawler was shelled and sunk in the North Sea 15 nautical miles (28 km) east of Buchan Ness, Aberdeenshire by SM UB-22 ( Imperial German Navy). Her crew survived. |
| Ascaro | Italy | World War I: The cargo ship was sunk in the Atlantic Ocean south west of Ireland (49°10′N 11°40′W﻿ / ﻿49.167°N 11.667°W﻿ / 49.167; -11.667) by SM U-93 ( Imperial German Navy). |
| Borrowdale | Russian Empire | World War I: The barque was stopped and sunk in the Atlantic Ocean south of Ireland (49°00′N 10°20′W﻿ / ﻿49.000°N 10.333°W﻿ / 49.000; -10.333) by SM U-21 ( Imperial German Navy). Her crew survived. |
| Chrisomalli Th. Sifneo | Greece | World War I: The cargo ship was sunk in the Mediterranean Sea east of Algiers, Algeria (36°55′N 4°02′E﻿ / ﻿36.917°N 4.033°E﻿ / 36.917; 4.033) by SM U-33 ( Imperial German Navy). Her crew survived. |
| Colbert | France | World War I: The troopship was torpedoed and sunk in the Mediterranean Sea (37°05′N 8°22′E﻿ / ﻿37.083°N 8.367°E﻿ / 37.083; 8.367) by SM UC-37 ( Imperial German Navy) with the loss of 51 lives. |
| Delamere | United Kingdom | World War I: The 1,525-ton United Africa Company cargo ship was torpedoed and sunk in the Atlantic Ocean 110 nautical miles (200 km) west by north of the Fastnet Rock (51°40′N 13°00′W﻿ / ﻿51.667°N 13.000°W﻿ / 51.667; -13.000) by SM U-70 ( Imperial German Navy) with the loss of ten crew. |
| Durley Chine | United Kingdom | The 1,918-gross register ton tanker sank in 180 feet (55 m) of water in the North Atlantic Ocean east of Toms River, New Jersey, after colliding with the steamer Harlem ( United States). Her entire crew of 28 survived. Her wreck is known as the "Bacardi Wreck." |
| Eden | Norway | World War I: The cargo ship was sunk in the English Channel off Worthing, Sussex, United Kingdom (50°48′N 0°22′W﻿ / ﻿50.800°N 0.367°W﻿ / 50.800; -0.367) by SM UC-70 ( Imperial German Navy). Her crew survived. |
| Fortunata | Italy | World War I: The cargo ship was sunk in the Atlantic Ocean 130 nautical miles (240 km) west of the Fastnet Rock by SM U-62 ( Imperial German Navy). Her crew survived. |
| Gorizia | Uruguay | World War I: The cargo ship struck a mine and sank in the English Channel 17 nautical miles (31 km) west by north of Portland Bill, Dorset (50°36′N 2°55′W﻿ / ﻿50.600°N 2.917°W﻿ / 50.600; -2.917). |
| Horsa | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 195 nautical miles (361 km) south west by west of the Fastnet Rock (48°43′N 12°35′W﻿ / ﻿48.717°N 12.583°W﻿ / 48.717; -12.583) by SM U-93 ( Imperial German Navy) with the loss of eleven of her crew. One of the survivors was taken as a prisoner of war. |
| Jarstein | Norway | World War I: The sailing vessel was sunk in the North Sea 80 nautical miles (150 km) south west by west of the Egerä Lighthouse (57°35′N 4°15′E﻿ / ﻿57.583°N 4.250°E﻿ / 57.583; 4.250) by SM U-61 ( Imperial German Navy). Her crew survived. |
| Kuhwarder | Imperial German Navy | World War I: The Grasbrook-class Vorpostenboot was sunk by mines in Lister Deep. |
| Little Mystery | United Kingdom | World War I: The schooner was scuttled in the English Channel off Portland Bill by SM UC-61 ( Imperial German Navy). Her crew survived. |
| Parthenon | Greece | World War I: The cargo ship was sunk in the Atlantic Ocean 200 nautical miles (370 km) south west of the Fastnet Rock (49°25′N 11°58′W﻿ / ﻿49.417°N 11.967°W﻿ / 49.417; -11.967) by SM U-93 ( Imperial German Navy). |
| Portbail | France | World War I: The coaster was sunk in the English Channel north east of Cap Barfleur, Manche (50°05′N 0°55′W﻿ / ﻿50.083°N 0.917°W﻿ / 50.083; -0.917) by SM UB-32 ( Imperial German Navy). Her crew survived. |
| Scow No. 9 | United States | The scow sank at Jennings Dock, Southport, Connecticut. |
| HMS Tulip | Royal Navy | World War I: The Aubrietia-class sloop, operating as a Q-ship, was torpedoed and sunk in the Atlantic Ocean south west of Ireland by SM U-62 ( Imperial German Navy) with the loss of 102 crew. Her captain survived and was taken as a prisoner of war. |

## Unknown date

List of shipwrecks: Unknown date 1917 :
| Ship | State | Description |
| Agia | Greece | World War I: The sailing vessel was sunk in the Mediterranean Sea off the coast of North Africa by SM UC-22 ( Imperial German Navy). |
| Evangelistria | Greece | World War I: The sailing vessel was sunk in the Mediterranean Sea off the coast of North Africa by SM UC-22 ( Imperial German Navy). |
| Kyriotis | Greece | World War I: The sailing vessel was sunk in the Mediterranean Sea off the coast of North Africa by SM UC-22 ( Imperial German Navy). Her crew survived. |