List of shipwrecks in March 1917

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

1 March

 * SS Apollonia (1891) ( undefined): World War I: The cargo ship struck a mine and sank in the North Sea 1 nmi east of Flamborough Head, Yorkshire, United Kingdom (54.16667°N, -0.06667°W). Her crew survived.
 * Bout de Zan (🇫🇷 France): World War I: The fishing vessel was shelled and damaged in the English Channel 6 nmi west of Berck, Pas-de-Calais. She was abandoned by her crew and came ashore at Dungeness, Kent, United Kingdom where she was declared a total loss.
 * SS Chatburn (1894) ( undefined): World War I: The cargo ship was torpedoed and sunk in the English Channel 22 nmi north east of Cape Barfleur, Manche, France (50°N, -0.91667°W) by SMU UB-18 . Her crew survived.
 * Diamond Cross (🇧🇪 Belgium): World War I: The fishing vessel was shelled and sunk in the English Channel west of Berck by SMU UC-65 . Her crew survived.
 * SS Drina (1913) ( undefined): World War I: The passenger ship struck a mine and sank in the Irish Sea 2 nmi west of Skokholm, Pembrokeshire (51.68333°N, -5.33333°W) with the loss of fifteen lives.
 * Elise II (🇫🇷 France): World War I: The fishing vessel was shelled and sunk in the English Channel 8 nmi off Cayeux-sur-Mer, Somme by SMU UC-65 . Her crew survived.
 * SS Elorn (1894) (🇫🇷 France): World War I: The coaster was shelled and sunk in the English Channel 6 nmi north north east of Le Tréport, Seine-Maritime (50.18333°N, 1.4°W) by SMU UC-65 with the loss of two of her crew.
 * General Radiguet (🇫🇷 France): World War I: The fishing vessel was scuttled in the English Channel 2 nmi north north west of Cayeux-sur-Mer by SMU UC-65 . Her crew survived.
 * Germaine (🇫🇷 France): World War I: The trawler was scuttled in the English Channel 6 nmi west of Berck by SMU UC-65.
 *  : World War I: The hospital ship struck a mine and was damaged in the English Channel 8 nmi north west of the Owers Lightship ( undefined). She was repaired and returned to service.
 * SS Gurre (1889) (🇳🇴 Norway): World War I: The cargo ship was sunk in the North Sea (59.5°N, 2°W) by SMU U-66 with the loss of twenty crew.
 * Herbert Ingram ( undefined): World War I: The trawler was scuttled in the North Sea 70 nmi east of the Longstone Lighthouse, Northumberland (55.98333°N, 0.41667°W) by SMU UC-29 . Her crew survived.
 * Homocea (🇫🇷 France): World War I: The trawler was shelled and sunk in the English Channel 7 nmi north north west of Cayeux-sur-Mer by SMU UC-65 . Her crew survived.
 * Josephine Adolphine (🇫🇷 France): World War I: The fishing vessel was scuttled in the English Channel 2 nmi north west of Cayeux-sur-Mer by SMU UC-65 . Her crew survived.
 * SS Jumna ( undefined): World War I: The cargo ship was scuttled in the Indian Ocean 650 nmi west of Minicoy, India by SMS Wolf (auxiliary cruiser).
 *  Mabella (🇳🇴 Norway): World War I: The full-rigged ship was sunk in the Atlantic Ocean 24 nmi south south west of Old Head of Kinsale, County Cork, United Kingdom (51.21667°N, -9.06667°W) by SMU UC-43 . Her crew survived.
 * SS Munificent ( undefined): World War I: The collier was torpedoed and sunk in the English Channel 3.5 nmi off Cap Gris Nez, Pas-de-Calais, France by a Kaiserliche Marine submarine.
 * N.D. de Lourdes (🇫🇷 France): World War I: The fishing vessel was shelled and sunk in the English Channel 6 nmi west of Berck by SMU UC-65.
 * SS Nicolaos (1882) (🇬🇷 Greece): World War I: The cargo ship was sunk in the Mediterranean Sea south of Sardinia, Italy by SMU U-65 (Germany).
 *  Norma (🇳🇴 Norway): World War I: The barque was shelled and sunk in the North Sea 4 nmi east by north of the Shetland Islands by SMU U-58 with the loss of a crew member.
 * SS Orion (1882) (🇳🇴 Norway): World War I: The cargo ship was sunk in the North Sea (55.96667°N, 0.85°W) by SMU UC-41 with the loss of nineteen of her crew.
 * HMS Pheasant (1916) : World War I: The Admiralty M-class destroyer struck a mine and sank in the Atlantic Ocean west of the Orkney Islands with the loss of 88 crew.
 * Redcap ( undefined): World War I: The trawler was shelled and sunk in the North Sea 97 nmi east of the Longstone Lighthouse (56.16667°N, 1.16667°W) by SMU UC-29 with the loss of a crew member.
 * Reine des Anges (🇫🇷 France): World War I: The trawler was sunk in the English Channel 6 nmi west of Berck by SMU UC-65 . Her crew survived.
 * Sainte Famille (🇫🇷 France): World War I: The fishing vessel was shelled and sunk in the English Channe off Boulogne, Pas-de-Calais by SMU UC-65 . Her crew survived.
 * Saint Joseph (🇫🇷 France): World War I: The fishing vessel was sunk in the English Channel south of Boulogne by SMU UC-65.
 * Seigneur (🇫🇷 France): World War I: The fishing vessel was shelled and sunk in the English Channel west of Berck by SMU UC-65.
 *  Storenes (🇳🇴 Norway): World War I: The barque was scuttled in the Atlantic Ocean south west of the Old Head of Kinsale by SMU UC-43 . Her crew survived.
 *  Teresina ( undefined): World War I: The brigantine was scuttled in the Mediterranean Sea south of Sardinia by SMU U-65 (Germany) . Her crew survived.
 * SS Tillycorthie (1913) ( undefined): World War I: The coaster was shelled and sunk in the North Sea off the Longstone Lighthouse, Northumberland by SMU UC-41 . Her crew survived.

2 March

 * SS Edvard Greig (1903) (🇳🇴 Norway): World War I: The coaster was sunk in the North Sea (57.16667°N, 4.08333°W) by SMU U-61 with the loss of fifteen crew.
 *  Gazelle ( undefined): World War I: The ketch was scuttled in the English Channel 20 nmi south south west of Dungeness, Kent by SMU U-53 . Her crew survived.
 * San Vincenza F. ( undefined): World War I: The sailing vessel was sunk in the Strait of Sicily by SMU U-65 (Germany).
 * Utopia ( undefined): World War I: The sailing vessel was shelled and sunk in the English Channel 20 nmi south south west of Dungeness (50.51667°N, 0.65°W) by SMU U-53 . Her crew survived.

3 March

 * Anna E ( undefined): World War I: The sailing vessel was sunk in the Strait of Sicily by SMU U-39.
 * RMS Connaught (1897) ( undefined): World War I: The troopship was torpedoed and sunk in the English Channel 29 nmi south of the Owers Lightship ( undefined) (50.13333°N, -0.75°W) by SMU U-48 with the loss of three crew.
 * SS Craigendoran (1899) ( undefined): World War I: The collier was torpedoed and sunk in the Mediterranean Sea 6 nmi east of Cape Sigli, Algeria by SMU UC-37 with the loss of three of her crew. Two of the survivors were taken as prisoners of war.
 * Hermes (🇳🇴 Norway): World War I: The sailing vessel was sunk in the North Sea 10 nmi of Utsira, Rogaland by SMU U-80 with the loss of twelve crew.
 * SS Kincardine (1906) ( undefined): World War I: The collier was torpedoed and sunk in the Atlantic Ocean 20 nmi north east of Tearaght Island, County Donegal (52.36667°N, -10.43333°W) by SMU U-70 . Her crew survived.
 * SS Meldon (1902) ( undefined): World War I: The collier struck a mine and was damaged in the Firth of Lorn (56.33333°N, -5.93333°W). She was taken in tow but sank at the mouth of Loch Buie. Her crew survived.
 * SS Newstead (1894) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 150 nmi west north west of the Fastnet Rock (52.03333°N, -13.4°W) by SMU U-49 with the loss of fifteen crew.
 * HMT Northumbria : World War I: The naval trawler struck a mine and sank in the Firth of Forth 1 nmi north of the Isle of May, Fife (56.20694°N, -2.56667°W) with the loss of five of her crew.
 * SS Ring (1897) (🇳🇴 Norway): World War I: The coaster was sunk in the North Sea 4 nmi east by south of Berwick-upon-Tweed, Northumberland, United Kingdom (59.82833°N, -1.91389°W) by SMU UC-41 . Her crew survived.
 * SS River Forth (1907) ( undefined): World War I: The collier was torpedoed and sunk in the Mediterranean Sea 60 nmi south by east of Malta (34.9°N, 15°W) by SMU UC-35 with the loss of two of her crew.
 * SS Rosborg (1907) (🇳🇴 Norway): World War I: The cargo ship was sunk in the North Sea (58.66667°N, -0.25°W) by SMU U-61 with the loss of six crew.
 * SS Sagamore (Harland & Wolff, 1892) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 150 nmi west of the Fastnet Rock (51.83333°N, -14°W) by SMU U-49 with the loss of 52 crew.
 * SS Setubal (🇵🇹 Portugal): The cargo ship was wrecked. Her crew survived.
 * SS Theodoros Panaglos (1895) (🇬🇷 Greece): World War I: The cargo ship was shelled and sunk in the English Channel 30 nmi south south west of The Lizard, Cornwall, United Kingdom (49.66667°N, -5.5°W) by SMU U-53 . Her crew survived.

4 March

 * SS Narcis (🇧🇪 Belgium): The cargo ship sprang a leak in the Atlantic Ocean. She developed a 32° list on 5 March, and was abandoned on 6 March at 49.5°N, -22.28333°W. Narcis was later sunk by gunfire from SS Taramac ( undefined) as she was a danger to navigation.
 *  The Macbain ( undefined): World War I: The barquentine was scuttled in the English Channel 20 nmi south of Portland Bill, Dorset by SMU U-48 . Her crew survived.
 * SS Rhodanthe ( undefined): World War I: The cargo ship was sunk in the Atlantic Ocean 330 nmi north north west of the Cape Verde Islands, Portugal by SMS Möwe . Her crew were taken as prisoners of war.
 * SS Turritella ( undefined): World War I: The cargo ship was scuttled in the Indian Ocean by SMS Wolf (auxiliary cruiser).

5 March

 * HMT Campania II : The naval trawler was lost on this date with the loss of all hands.
 * SS Copenhagen (1907) ( undefined): World War I: The passenger ship was torpedoed and sunk in the North Sea 8 nmi east of the Noord Hinder Lightship (🇳🇱 Netherlands) by SMU UC-61 with the loss of six lives.
 * SS Federico Confalonieri (1911) ( undefined): World War I: The cargo ship was sunk in the Atlantic Ocean south west of Ireland (51.83333°N, -13.53333°W) by SMU U-53.
 * Guadiana (🇵🇹 Portugal): World War I: The sailing vessel was set afire and sunk in the Atlantic Ocean south of Ireland by SMU UC-44.
 * Salvatore ( undefined): World War I: The sailing vessel was sunk in the Malta Channel by SMU UC-37.

6 March

 * SS Caldergrove (1909) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 200 nmi west north west of the Fastnet Rock (51.5°N, -14.85°W) by SMU U-44 with the loss of nineteen crew.
 * SS Cornelia (1872) ( undefined): World War I: The coaster was shelled and sunk in the Atlantic Ocean 9 nmi of the Skellig Islands, County Kerry (51.78333°N, -10.71667°W) by SMU UC-43 . Her crew survived.
 * SS Fenay Lodge (1904) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 250 nmi north west of the Fastnet Rock (51.4°N, -16.18333°W) by SMU U-44 with the loss of four crew.
 * SS Porto di Smirne (1895) ( undefined): World War I: The cargo ship was sunk in the Mediterranean Sea 150 nmi south west of Cape Matapan, Greece by SMU U-65 (Germany).
 * SS Sawa Maru (1890) (🇯🇵 Japan): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 30 nmi west of Bull Rock, County Cork, United Kingdom by SMU UC-43 . Her crew survived.

7 March

 * SS Adalands (1880) (🇳🇴 Norway): World War I: The cargo ship was sunk in the Atlantic Ocean 8 nmi south west of the Fastnet Rock by SMU UC-44 . Her crew survived.
 * SS Antonio (1905) ( undefined): World War I: The cargo ship struck a mine and sank in the English Channel 7 nmi off Dartmouth, Devon with the loss of eleven of her crew.
 * SS Baron Wemyss (1912) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 73 nmi north west by west of the Fastnet Rock (51.66667°N, -11.5°W) by SMU UC-43 with the loss of two of her crew.
 * Naamah ( undefined): World War I: The trawler was shelled and sunk in the North Sea 35 nmi south by east of North Ronaldsay, Orkney Islands by SMU UC-76 . Her crew survived.
 * SS Navarra (1907) (🇳🇴 Norway): World War I: The cargo ship was shelled and sunk in the Atlantic Ocean south of the Eddystone Lighthouse, Cornwall, United Kingdom (49.6°N, -4.2°W) by SMU U-48 with the loss of nineteen crew.
 * SS Ohio (1914) (🇫🇷 France): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 152 nmi north west of the Skellig Islands, County Kerry, United Kingdom (51.75°N, -14.5°W) by SMU U-44.
 * HMT Vivanti : The naval trawler was lost on this date.
 * Vulcana ( undefined): World War I: The trawler was shelled and sunk in the North Sea 40 nmi east south east of the Auskerry Lighthouse, Orkney Islands by SMU UC-76 with the loss of two of her crew.
 * SS Westwick (1916) ( undefined): World War I: The cargo ship struck a mine and sank in the Irish Sea 1 nmi south of Roche Point, Queenstown, County Cork. Her crew survived.

8 March

 * SS Ares (1914) (🇳🇱 Netherlands): World War I: The tanker was sunk in the Atlantic Ocean 40 nmi west of Cascais, Portugal (38.2°N, -10.31667°W) by SMU UC-74.
 * SS Dunbarmoor (1903) ( undefined): World War I: The cargo ship was shelled and sunk in the Atlantic Ocean 180 nmi west north west of the Fastnet Rock (51.36667°N, -14.51667°W) by SMU U-44 with the loss of twelve crew.
 * SS Georgian (1890) ( undefined): The cargo ship was torpeded and sunk in the Mediterranean Sea 52 nmi north of Cape Sidero, Crete, Greece (36.21667°N, -26.08333°W) by SMU UB-47  with the loss of five of her crew.
 *  Silas (🇳🇴 Norway): World War I: The barque was sunk in the Atlantic Ocean off the west coast of Ireland (52.16667°N, -16°W) by SMU U-44 . Her crew survived.
 * SS Storstad ( undefined): World War I: The collier was sunk in the Atlantic Ocean 45 nmi west south west of the Fastnet Rock (51.33333°N, -11.83333°W) by SMU U-62 with the loss of three crew.
 *  Vega ( undefined): World War I: The barque was sunk in the Atlantic Ocean west of the Bishop Rock, Isles of Scilly (51°N, -12°W) by SMU U-62.

9 March

 *  Abeja ( undefined): World War I: The schooner was shelled and sunk in the English Channel 20 nmi south west by south of Start Point (49.88333°N, -3.7°W) by SMU U-48 . Her crew survived.
 * SS Cavour ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean off Ireland (51.25°N, -6.91667°W) by SMU U-53 . Her crew survived.
 * SS Dana (1903) (🇳🇴 Norway: World War I: The coaster was sunk in the North Sea 5 nmi south of Sumburgh Head, Shetland Islands, United Kingdom by SMU UC-76 . Her crew survived.
 * SS East Point (1901) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 9 nmi east by south of the Eddystone Lighthouse by SMU U-48 . Her crew survived.
 * HMS Fauvette : World War I: The armed boarding steamer struck a mine and sank in The Downs (51.4°N, 1.48333°W with the loss of fourteen of her crew.
 *  Inverlogie ( undefined): World War I: The barque was torpedoed and sunk in the Atlantic Ocean 15 nmi south west of the Smalls Lighthouse by SMU U-70 . Her crew survived.
 * SS Lars Fostenes (1916) (🇳🇴 Norway): World War I: The cargo ship was sunk in the Atlantic Ocean off Cork, United Kingdom by SMU U-53 . Her crew survived.
 *  Laurits (🇩🇰 Denmark): World War I: The schooner was sunk in the Atlantic Ocean off Stornoway, Isle of Lewis, Outer Hebrides, United Kingdom by SMU UC-43 . Her crew survived.
 *  Spartan (🇳🇴 Norway): World War I: The barque was torpedoed and sunk in the Atlantic Ocean 75 nmi south west of the Fastnet Rock (50.43333°N, -10.75°W) by SMU U-61 . Her crew survived.

10 March

 * SS Algol (1896) (🇳🇴 Norway): World War I: The coaster was shelled and sunk in the North Sea east of the Shetland Islands, United Kingdom (60.33333°N, 0.83333°W) by SMU U-81 . Her eighteen crew took to the lifeboats but were not rescued.
 * SS Asbjørn (1899) (🇳🇴 Norway): World War I: The cargo ship was sunk in the Atlantic Ocean 13 nmi north north west of Ouessant, Finistère, France by SMU UC-21 . Her crew survived.
 * SS Angola (1906) (🇵🇹 Portugal): World War I: The cargo ship was sunk in the Atlantic Ocean 112 nmi south west of the Bishop Rock, Isles of Scilly, United Kingdom by SMU U-61.
 * SS Esmereldas ( undefined): World War I: The cargo ship was sunk in the Atlantic Ocean 420 nmi west of Lisbon, Portugal by SMS Möwe . Her crew were taken as prisoners of war.
 *  James Burton Cook ( undefined): World War I: The schooner was shelled and sunk in the Mediterranean Sea 25 nmi south south east of Málaga, Spain by SMU UC-74 . Her crew survived.
 *  Marie (🇫🇷 France): World War I: The schooner was sunk in the Atlantic Ocean 15 nmi north of the Seven Stones reef by SMU U-62.
 *  Mediterranean ( undefined): World War I: The schooner was shelled and sunk in the Atlantic Ocean 13 nmi south of Hook Point, County Waterford by SMU U-70 . Her crew survived.
 * SS Otaki ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 420 nmi west of Lisbon by SMS Möwe with the loss of six of her crew. Survivors were taken as prisoners of war.
 * SS Skreien (1869) (🇳🇴 Norway): World War I: The coaster was scuttled in the North Sea 60 nmi east of Lerwick, Shetland Islands by SMU U-81 with the loss of five of her crew.
 *  T. Crowley ( undefined): World War I: The schooner was shelled and sunk in the Atlantic Ocean 12 nmi south of Hook Point by SMU U-70 . Her crew survived.
 * SMU UC-43 : World War I: The Type UC II submarine was torpedoed and sunk in the North Sea north of Muckle Flugga, Shetland Islands, United Kingdom (60.95°N, -1.18333°W) by HMS G13 with the loss of all 26 crew.

11 March

 * SS Charles Le Cour (1903) (🇫🇷 France): World War I: The cargo ship was sunk in the Atlantic Ocean 7 nmi north north east of the Pendeen Lighthouse, Cornwall, United Kingdom (50.26667°N, -5.6°W) by SMU UC-47 . Her crew survived.
 * SS Folia (1907) ( undefined): World War I: The cargo liner was torpedoed and sunk in the Atlantic Ocean 4 nmi east south east of Ram Head by SMU U-53 with the loss of seven crew.
 * SS G. A. Savage (1900) ( undefined): World War I: The coaster was torpedoed and sunk in the Atlantic Ocean off Pendeen Point, Cornwall by SMU UC-47 with the loss of all nine crew.
 * SS Gracia (1888) (🇪🇸 Spain): World War I: The cargo ship was sunk in the Atlantic Ocean 5 nmi south of Ballycotton, County Cork, United Kingdom by SMU U-53 . Her crew survived.
 * SS Horngarth ( undefined): World War I: The cargo ship was scuttled in the Atlantic Ocean 220 nmi east north east of the St Paul Rocks, Brazil by SMS Seeadler (auxiliary cruiser) with the loss of a crew member.
 * SS Kwasind (1894) ( undefined): World War I: The cargo ship struck a mine and sank in the North Sea off Southwold, Suffolk (52.13333°N, 1.75°W) with the loss of twelve of her crew.
 * Thrift ( undefined): World War I: The fishing smack was shelled and sunk in the Atlantic Ocean 15 nmi west of Trevose Head, Cornwall (50.5°N, -5.4°W) by SMU U-62 . Her crew survived.
 * SS Wordsworth ( undefined): World War I: The cargo ship was scuttled in the Indian Ocean 680 nmi west of Mahé, Seychelles by SMS Wolf (auxiliary cruiser).

12 March

 * SS Algonquin (1888) (🇺🇸 United States): World War I: The cargo ship was sunk in the Atlantic Ocean 65 nmi west of the Bishop Rock, Isles of Scilly, United Kingdom (49.65°N, -7.85°W) by SMU U-62 . Her crew survived.
 * Alice Charles (🇫🇷 France): World War I: The fishing vessel was scuttled in the Bay of Biscay off the Gironde Estuary by SMU UC-21.
 * HMS Ambient (1904) ( undefined): World War I: The collier struck a mine and sank in the North Sea 7 nmi north west of the Shipwash Lightship ( undefined) (52.13333°N, 1.76667°W). Her crew survived.
 * Aréthuse (🇫🇷 France): World War I: The fishing vessel was scuttled in the Bay of Biscay off the Gironde Estuary by SMU UC-21.
 * SS Bilswood (1915) ( undefined): World War I: The collier struck a mine and sank in the Mediterranean Sea 8 nmi off Alexandria, Egypt. Her crew survived.
 *  Collingwood (🇳🇴 Norway): World War I: The barque was sunk in the Atlantic Ocean west of the Isles of Scilly (49.21667°N, -9.65°W) by SMU U-62 . Her crew survived.
 * C.A.S. ( undefined): World War I: The fishing smack was scuttled in the Atlantic Ocean 12 nmi north north west of Trevose Head, Cornwall (50.76667°N, -5.16667°W) by SMU UC-47 . Her crew survived.
 * HMS E49 : World War I: The E-class submarine struck a mine and sank off the Shetland Islands with the loss of all 30 crew.
 * SS Einar Jarl (1914) (🇳🇴 Norway): World War I: The cargo ship was sunk in the English Channel 10 nmi east south east of Start Point, Devon, United Kingdom by SMU UC-66 . Her crew survived.
 * Ena ( undefined): World War I: The fishing smack was scuttled in the Atlantic Ocean 10 nmi north by west of Trevose Head (50.7°N, -5.08333°W) by SMU UC-47 . Her crew survived.
 * Forget-Me-Not ( undefined): World War I: The fishing smack was sunk in the English Channel 12 nmi south west of Portland Bill, Dorset by SMU UC-66 . Her crew survived.
 * SS Glynymel (1890) ( undefined): World War I: The cargo ship was shelled and scuttled in the English Channel 23 nmi south by west of St. Catherine's Point, Isle of Wight (50.2°N, -1.18333°W) by SMU UC-66 with the loss of a crew member.
 * Gracia ( undefined): World War I: The fishing smack was scuttled in the Atlantic Ocean 12 nmi north north west of Trevose Head (50.73333°N, -5.11667°W) by SMU UC-47 . Her crew survived.
 *  Guerveur (🇫🇷 France): World War I: The barque was shelled and sunk in the Atlantic Ocean 84 nmi of Tory Island, County Donegal, United Kingdom (55.7°N, -10.86667°W) by SMU U-48.
 * SS Hainaut ( undefined) World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean south west of Ireland (52.08333°N, -11.5°W) by SMU U-53 . Her crew survived.
 * Hyacinth ( undefined): World War I: The fishing smack was scuttled in the Atlantic Ocean 15 nmi north by west of Trevose Head (50.78333°N, -5.16667°W) by SMU UC-47 . Her crew survived.
 * Inter-nos ( undefined): World War I: The fishing smack was scuttled in the Atlantic Ocean 12 nmi north north west of Trevose Head (50.73333°N, -5.11667°W)) by SMU UC-47 . Her crew survived.
 * Jessamine ( undefined): World War I: The fishing smack was scuttled in the Atlantic Ocean 14 nmi north north west of Trevose Head (50.76667°N, -5.13333°W) by SMU UC-47 . Her crew survived.
 *  Jules Gommes (🇫🇷 France): World War I: The schooner was scuttled in the Atlantic Ocean 60 nmi west of the Isles of Scilly (49.16667°N, -8.83333°W) by SMU U-62 . Her crew survived.
 * Lent Lily ( undefined): World War I: The fishing smack was scuttled in the Atlantic Ocean 13 nmi north north west of Trevose Head (50.75°N, -5.15°W) by SMU UC-47 . Her crew survived.
 * SS Lucy Anderson (1904) ( undefined): World War I: The cargo ship was shelled and sunk in the North Sea 55 nmi east south east of Noss, Shetland Islands (58.45°N, -1.3°W) by SMU UC-44 . Her crew survived.
 * SS Marna (1883) (🇳🇴 Norway): World War I: The coaster was sunk in the North Sea 60 nmi north east of Kinnaird Head, Aberdeenshire, United Kingdom by SMU UC-44 . Her crew survived.
 * SS Memnon (1890) ( undefined): World War I: The cargo ship was torpedoed and sunk in the English Channel 20 nmi south west of Portland Bill (50.25°N, -2.8°W) by SMU UC-66 with the loss of six of her crew.
 * Nellie ( undefined): World War I: The fishing smack was scuttled in the Atlantic Ocean 13 nmi north by west of Trevose Head (50.75°N, -5.15°W) by SMU UC-47 . Her crew survived.
 * Nina M. ( undefined): World War I: The sailing vessel was sunk in the Mediterranean Sea off Malta (36.45°N, 14.55°W) by SMU U-64 (Germany).
 * SS Pontypridd (1883) ( undefined): World War I: The cargo ship struck a mine and sank in the North Sea off Aldeburgh, Suffolk (52.13333°N, 1.76667°W) with the loss of three of her crew.
 * Proverb ( undefined): World War I: The fishing smack was scuttled in the Atlantic Ocean 25 nmi north west of Trevose Head (50.78333°N, -5.58333°W) by SMU UC-47 . Her crew survived.
 * Reindeer ( undefined): World War I: The fishing smack was scuttled in the English Channel 15 nmi south east of Berry Head, Devon by SMU UC-66 . Her crew survived.
 * Rivina ( undefined): World War I: The fishing smack was scuttled in the Atlantic Ocean 15 nmi north north west of Trevose Head (50.78333°N, -5.16667°W) by SMU UC-47 . Her crew survived.
 * HMS Skate (1917) : World War I: The Admiralty R-class destroyer was torpedoed and damaged in the North Sea off the Maas Lightship (🇳🇱 Netherlands) by SMU UC-69 with the loss of a crew member. She was repaired and returned to service.
 * SS Tandil (1900) ( undefined): World War I: The collier was torpedoed and sunk in the English Channel 20 nmi west by north of Portland Bill (49.6°N, -2.95°W) by SMU UC-68 with the loss of four of her crew.
 * SS Thode Fagelund (1904) (🇳🇴 Norway): World War I: The cargo ship was sunk in the North Sea off the Noord Hinder Lightship (🇳🇱 Netherlands) (51.66667°N, 2.96667°W) by SMU UB-27 . Her crew survived.
 * SS Topaz (1896) ( undefined): World War I: The coaster was torpedoed and sunk in the English Channel 27 nmi east by north of Cape Barfleur, Manche, France (49.83333°N, -0.66667°W) by SMU UB-18 with the loss of three of her crew.

13 March

 *  Alma ( undefined): World War I: The schooner was shelled and sunk in the Atlantic Ocean off Wexford, United Kingdom (approximately 51.58333°N, -7.58333°W) by SMU U-70.
 * Comrades ( undefined): World War I: The fishing smack was shelled and sunk in the North Sea off the coast of Norfolk by SMU UB-32 . Her crew survived.
 * SS Coronda (1892) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 180 nmi west of Tory Island, County Donegal (56.18333°N, -13.66667°W) by SMU U-81 with the loss of nine crew.
 *  Dag (🇸🇪 Sweden): World War I: The schoonerl was scuttled in the Atlantic Ocean south of the Fastnet Rock (49.3°N, -9.46667°W) by SMU U-62 . All ten people on board survived.
 * SS Demeterton ( undefined): World War I: The cargo ship was scuttled in the Atlantic Ocean 730 nmi east by north of Cape Race, Newfoundland by SMS Möwe . Her crew were taken as prisoners of war.
 * De Tien Kinders (🇧🇪 Belgium): World War I: The fishing vessel was sunk in the North Sea off the coast of Norfolk by SMU UB-32.
 * FRENCH TRAWLER Elisabeth : World War I: The naval trawler struck a mine and sank in the English Channel off Calais, Pas-de-Calais (51.01667°N, 1.86667°W).
 *  Elizabeth Eleanor ( undefined): World War I: The three-masted schooner was shelled and sunk in the Atlantic Ocean 77 nmi north west of Trevose Head, Cornwall (50.78333°N, -6.96667°W) by SMU U-70 . Her crew survived.
 * SS Girda (1888) (🇳🇴 Norway): World War I: The cargo ship was sunk in the Bay of Biscay off the Île d'Oléron, Charente-Maritime, France by SMU UC-21 . Her crew survived.
 * Gold Seeker ( undefined): World War I: The fishing smack was shelled and sunk in the North Sea off the coast of Norfolk by SMU UB-32 . Her crew survived.
 * SS La Campine (1890) (🇳🇱 Netherlands): World War I: The tanker was captured and sunk in the North Sea (56°N, 4.95°W) by SMU UC-50 . Her crew survived.
 * SS Luciline (1899) ( undefined): World War I: The tanker was torpedoed and damaged in the Atlantic Ocean off Tearaght Island, County Kerry by SMU U-61 . She was beached but was later refloated.
 * Navenby ( undefined): World War I: The trawler was scuttled in the North Sea 85 nmi east of Rattray Head, Aberdeenshire by SMU UC-44 . Her crew survived.
 * SS Northwaite (1905) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean off the Blasket Islands, County Kerry (52.18333°N, -11.11667°W) by SMU U-61 . Her crew survived.
 * SS Norwegian (1913) (🇳🇴 Norway): World War I: The cargo ship struck a mine and sank in the Atlantic Ocean 4 nmi south west of Seven Heads, Clonakilty, County Cork, United Kingdom with the loss of five of her crew.
 *  Pera ( undefined): World War I: The full-rigged ship was scuttled in St. George's Channel (50.83333°N, -7°W) by SMU U-70 . Her crew survived.
 *  Reward' ( undefined): The three-masted schooner was shelled and sunk in the English Channel south of Start Point, Cornwall (49.91667°N, -3.25°W) by SMU UC-72 with the loss of all hands.
 * Try ( undefined) World War I: The fishing smack was shelled and sunk in the Atlantic Ocean 10 nmi south of the Wolf Rock, Cornwall (49.86667°N, -5.76667°W) by SMU UC-66 . Her crew survived.
 * SMU UC-68 : The Type UC II submarine was sunk by the detonation of one of her own mines off Start Point, Cornwall, United Kingdom with the loss of all 26 crew.
 * SS Vivina (1885) (🇪🇸 Spain): World War I: The cargo ship was sunk in the Bay of Biscay 12 nmi off the Île d'Oléron by SMU UC-21 . Her crew survived.
 * HMS Warner : World War I: The Q-ship was torpedoed and sunk in the Atlantic Ocean south west of Ireland (52.33333°N, -11°W) by SMU U-61 with the loss of eleven crew.

14 March

 * Aquila (🇳🇴 Norway): World War I: The sailing vessel was sunk in the Atlantic Ocean west of the Orkney Islands, United Kingdom by SMU U-53 . Her crew survived.
 * SS Blåmanden (1907) (🇳🇴 Norway): World War I: The coaster was shelled and sunk in the Bay of Biscay 3 nmi east of the Île du Pilier, Vendée (47.01667°N, -2.45°W) by SMU UC-21 . Her crew survived.
 * SS Bray Head (1894) ( undefined): World War I: The cargo ship was shelled and sunk in the Atlantic Ocean 375 nmi north west by west of the Fastnet Rock (52.06667°N, -18.83333°W) by SMU U-44 with the loss of 21 crew.
 * SS Brika (1908) ( undefined): World War I: The cargo ship was torpedoed and sunk in St. George's Channel 13 nmi south east by south of the Coningbeg Lightship ( undefined) by SMU UC-47 with the loss of two of her crew.
 * SS Davanger (1916) (🇳🇴 Norway): World War I: The cargo ship was sunk in the North Sea 40 nmi west north west of Hoek van Holland, South Holland, Netherlands by SMU UB-27 . Her crew survived.
 * SS Governor ( undefined): World War I: The cagro ship was torpedoed and sunk in the Atlantic Ocean 930 nmi west of the Fastnet Rock by SMS Möwe with the loss of four of her crew. The survivors were taken as prisoners of war.
 * La Marne (🇫🇷 France): World War I: The sailing vessel was sunk in the Bay of Biscay by SMU UC-21.
 * SS Orsova (1909) ( undefined): World War I: The ocean liner struck a mine and was damaged in the Atlantic Ocean off the Eddystone Lighthouse with the loss of eight lives. She was beached but was later refloated.
 * SS Paignton (1911) ( undefined): World War I: The cargo ship was shelled and sunk in the Atlantic Ocean 40 nmi north west of the Skellig Islands, County Kerry (52.01667°N, -11.48333°W) by SMU U-81 with the loss of a crew member.
 * SS Rose Lea (1902) ( undefined): World War I: The collier was torpedoed and sunk in the Atlantic Ocean 230 nmi west of the Bishop Rock, Isles of Scilly (48.75°N, -12.13333°W) by SMU U-62 . Her crew survived.
 * SS Storaas (1895) (🇳🇴 Norway): World War I: The cargo ship was sunk in the North Sea 160 nmi south west of Lista, Vest-Agder (55.5°N, 2.91667°W) by SMU UC-29 . Her crew survived.

15 March

 * Adieu Va (🇫🇷 France): World War I: The sailing vessel was sunk in the English Channel off Cape Barfleur, Manche by SMU UB-18.
 * SS Balaguier (1904) (🇫🇷 France): World War I: The cargo ship was sunk in the Atlantic Ocean 150 nmi south west of the Bishop Rock, Isles of Scilly, United Kingdom (48.66667°N, -9.5°W) by SMU U-70.
 * SS Circe (1910) (🇫🇷 France): World War I: The cargo ship was torpedoed and damaged in the Atlantic Ocean 96 nmi south west of the Bishop Rock (49.16667°N, -8.83333°W) by SMU U-70 ( with the loss of four crew. She was discovered derelict the next day by SS Gordonia ( undefined), which rescued a survivor. Circe subsequently sank.
 * SS Coonagh (1904) ( undefined): World War I: The cargo ship was sunk in the English Channel off Saint-Valery-en-Caux, Seine-Maritime, France (49.91667°N, 0.7°W) by SMU UC-16 with the loss of all ten crew.
 *  Eugene Pergeline (🇫🇷 France): World War I: The barque was sunk in the Atlantic Ocean off the Fastnet Rock (51.08333°N, -9.58333°W) by SMU U-54 . Her crew survived.
 *  Eugene Robert (🇫🇷 France): World War I: The schooner was shelled and sunk in the Bay of Biscay 22 nmi north west of the Île d'Yeu, Vendée (47°N, -2.83333°W) by SMU UC-21 . Her crew survived.
 * Fleur d'Esperance (🇫🇷 France): World War I: The fishing vessel was shelled and sunk in the Bay of Biscay 8 nmi south of Kerdonis Point, Belle Île, Morbihan by SMU UC-21 . Her crew survived.
 * HMS Foyle (1902) World War I: The River-class destroyer struck a mine in the Strait of Dover, the force of which blew off her bows. Twenty eight of her crew were killed. The stern was towed towards Plymouth but sank off the Mewstone (50.27833°N, -4.18°W).
 * SS Frimaire (1899) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Bay of Biscay 21 nmi south south east of Belle Île (47.05°N, -2.43333°W) by SMU UC-21 with the loss of twelve of her crew.
 * Petit Jean (🇫🇷 France): World War I: The fishing vessel was sunk in the Bay of Biscay 15 nmi south of Pointe d'Arzie by SMU UC-21.
 * SS Solferino (1900) (🇳🇴 Norway): World War I: The cargo ship was sunk in the Atlantic Ocean 7 nmi north of Ouessant, Finistère, France by SMU UC-47 . Her crew survived.
 * SS Wilfred (1905) (🇳🇴 Norway): World War I: The cargo ship was sunk in the Atlantic Ocean 18 nmi north of Ouessant (48.7°N, -5.1°W) by SMU UC-47 . Her crew survived.

16 March

 *  Anaïs (🇫🇷 France): World War I: The schooner was scuttled in the Atlantic Ocean 14 nmi south east of the Glénan Islands, Finistère by SMU UC-21 . Her crew survived.
 * SS Catania (1906) ( undefined): World War I: The passenger ship was sunk in the Mediterranean Sea 15 nmi off Belvedere Calabro (39.53333°N, 15.7°W) by SMU U-64 (Germany).
 * Cordouan (🇫🇷 France): World War I: The pilot boat was sunk in the Bay of Biscay off the coast of Gironde by SMU UC-70.
 * SS Gudbrand (1897) (🇳🇴 Norway): World War I: The cargo ship was sunk in the North Sea 7 nmi north east of Blyth, Northumberland, United Kingdom by SMU UC-50 . Her crew survived.
 * SS Kingswood (1896) ( undefined): The cargo ship collided with another vessel and sank. Her crew were rescued.
 *  Madeleine Davoust (🇫🇷 France): World War I: The schooner was shelled and damaged in the Bay of Biscay 6 nmi north west of Penmarc'h, Finistère by SMU UC-21 . The attack was broken off due to the arrival of a torpedo boat. Madeleine Davoust was taken in tow but sank at Audierne.
 *  Maggie Belle ( undefined): The schooner caught fire and sank in the Atlantic Ocean east of the Azores, Portugal. Her crew were rescued.
 * SS Medusa (1883) ( undefined): World War I: The cargo ship was sunk in the Atlantic Ocean off Ouessant, Finistère by SMU UC-47 . Her crew survived.
 * SS Narragansett (1903) ( undefined): World War I: The tanker was torpedoed and sunk in the Atlantic Ocean south west of Ireland (50.2°N, -17.56667°W) by SMU U-44 with the loss of 46 crew.
 * SS Norma Pratt (1907) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 150 nmi west of the Bishop Rock, Isles of Scilly (48.88333°N, -9.88333°W) by SMU U-70 . Her crew survived, but two of them were taken as prisoners of war.
 * SS Pandion (1904) ( undefined): The cargo ship collided with another vessel and sank. Her crew were rescued.
 * Pencaer ( undefined): World War I: The fishing ketch was scuttled in the Atlantic Ocean 9 nmi south by west of Ram Head, County Cork by SMU UC-48 . Her crew survived.
 * HMT Protect : The naval trawler was lost on this date.
 * SS Ronald (1894) (🇳🇴 Norway): World War I: The cargo ship was sunk in the Bay of Biscay 7.5 nmi south south east of the Penfret Lighthouse, Glénan Islands, Finistère (47.7°N, -3.86667°W) by SMU UC-21 . Her crew survived.
 * Sir Joseph ( undefined): World War I: The ketch was scuttled in the English Channel 30 nmi south south east of Start Point, Devon by SMU UB-18 . Her crew survived.
 *  Sully (🇫🇷 France): World War I: The barque was scuttled in the Atlantic Ocean 15 nmi west of Ouessant by SMU UC-47 . Her crew survived.
 * SS Vigilancia (1890) (🇺🇸 United States): World War I: The cargo ship was sunk in the Atlantic Ocean 145 nmi west of the Bishop Rock (48.95°N, -9.56667°W) by SMU U-70 with the loss of fifteen of her crew.
 *  William Martin ( undefined): World War I: The schooner was scuttled in the Atlantic Ocean 9 nmi south by west of Ram Head by SMU UC-48 . Her crew survived.

17 March

 * Alcide Marie (🇫🇷 France): World War I: The fishing vessel was sunk in the Bay of Biscay off the coast of Gironde by SMU UC-70.
 * SS Antony (1907) ( undefined): World War I: The passenger ship was torpedoed and sunk in the Irish Sea 19 nmi west by north of the Coningbeg Lightship ( undefined) by SMU UC-48 with the loss of 55 lives.
 * HMT Caledonia : World War I: The naval trawler was sunk in the North Sea off Newton-by-the-Sea, Northumberland by SMU UC-50.
 * Camille Emile (🇫🇷 France): World War I: The fishing vessel was sunk in the Bay of Biscay off the coast of Gironde by SMU UC-70.
 * SS City of Memphis (1902) (🇺🇸 United States): World War I: The passenger ship was sunk in the Atlantic Ocean 33 nmi south of the Fastnet Rock by SMU UC-66 . All 57 people on board survived.
 * Dieu te Garde (🇫🇷 France): World War I: The fishing vessel was sunk in the Bay of Biscay off the coast of Gironde by SMU UC-70.
 * SS Expedit (1901) (🇳🇴 Norway): World War I: The coaster was sunk in the North Sea 15 nmi east of the Farne Islands, Northumberland (56.06667°N, -0.06667°W) by SMU UC-50 . Her crew survived.
 * HMT Gowan : World War I: The naval trawler was shelled and sunk in the North Sea 15 nmi east by south of the Longstone Lighthouse by SMU UC-50 . Her crew survived.
 * Guard ( undefined): World War I: The fishing vessel was shelled and sunk in the Irish Sea 8 nmi south west by west of the Coningbeg Lightship ( undefined) by SMU UC-48 . Her crew survived.
 * Juliette (🇫🇷 France): World War I: The fishing vessel was sunk in the Bay of Biscay off the coast of Gironde by SMU UC-70.
 * Kestrel ( undefined): World War I: The trawler was shelled and sunk in the North Sea 20 nmi east by south of the Longstone Lighthouse by SMU UC-50 . Her crew survived.
 * Louis XIV (🇫🇷 France): World War I: The fishing vessel was scuttled in the Bay of Biscay 35 nmi west of the Île de Ré, Charente-Maritime by SMU UC-70.
 *  Marie Louise (🇫🇷 France): World War I: The schooner was scuttled in the English Channel 35 nmi east by south of Start Point, Devon, United Kingdom (50.11667°N, -2.75°W) by SMU UB-18 . Her crew survived, they were rescued by SS Basse Indre (🇫🇷 France).
 * Marie Louise (🇫🇷 France): World War I: The ) sailing vessel was scuttled in the English Channel 32 nmi east south east of Portland Bill, Dorset, United Kingdom (50.23333°N, -1.73333°W) by SMU UB-18 . Her crew survived.
 * HMS Mignonette (1916) : World War I: The Arabis-class sloop struck a mine and sank in the Atlantic Ocean south west of Ireland with the loss of fourteen of her 79 crew.
 * Notre Dame du Perpetuel Secours (🇫🇷 France): World War I: The fishing vessel was sunk in the Bay of Biscay off the coast of Gironde by SMU UC-70.
 * Nozal'' (🇫🇷 France): World War I: The fishing vessel was sunk in the Bay of Biscay off the coast of Gironde by SMU UC-70.
 * HMS Paragon (1913) : World War I: Action of 17 March 1917: The Acasta-class destroyer was sunk in the Strait of Dover by a kaiserliche Marine destroyer.
 * Primeira Flor d'Abril (🇵🇹 Portugal): World War I: The fishing vessel was scuttled in the Atlantic Ocean 15 nmi west of Cabo da Roca by SMU UC-67.
 * Renée Islander (🇫🇷 France): World War I: The fishing vessel was sunk in the Bay of Biscay off the coast of Gironde by SMU UC-70.
 * Restaurador (🇵🇹 Portugal): World War I: The fishing vessel was sunk in the Atlantic Ocean 15 nmi west of Cabo da Roca by SMU UC-67.
 * Rupella (🇫🇷 France): World War I: The fishing vessel was sunk in the Bay of Biscay off the coast of Gironde by SMU UC-70.
 * SS Russia (1889) (🇩🇰 Denmark): World War I: The cargo ship was sunk in the English Channel 24 nmi north by east of Oeussant, Finistère, France (48.83333°N, -5.13333°W) by SMU UC-36 with the loss of four of her crew.
 * Santa Rita Segunda (🇵🇹 Portugal): World War I: The fishing vessel was sunk in the Atlantic Ocean 15 nmi west of Cabo da Roca by SMU UC-67.
 * Senhora do Rosario'' ( undefined): World War I: The fishing vessel was sunk in the Atlantic Ocean 15 nmi west of Cabo da Roca by SMU UC-67.
 * SS Tasso (1904) ( undefined): World War I: the cargo ship struck a mine and sank in the Bay of Biscay 5 nmi south of Groix, Morbihan, France with the loss of nineteen of her crew.
 * SS Tripoli (1872) ( undefined): World War I: The coaster was shelled and sunk in the Mediterranean Sea 40 nmi north of Stromboli (39.36667°N, 15.28333°W) by SMU U-64 (Germany).

18 March

 * HMS Alyssum (1915) : World War I: The Arabis-class sloop struck a mine and sank in the Atlantic Ocean south west of Galley Head, County Cork (51.51667°N, -8.95°W). Her crew survived.
 * HMT Ameer : World War I: The naval trawler struck a mine and sank in the North Sea off Felixtowe, Suffolk (51.97917°N, 1.46667°W) with the loss of eight of her crew.
 * HMS Duchess of Montrose : World War I: The auxiliary minesweeper struck a mine and sank in the North Sea off Gravelines, Pas-de-Calais, France (51.05°N, 2.11667°W) with the loss of twelve of her crew.
 * Entente Cordiale (🇫🇷 France): World War I: The fishing vessel was scuttled in the Bay of Biscay 18 nmi south of Les Barges, Vendée by SMU UC-70 . Her crew survived.
 * Félicité Albert (🇫🇷 France): World War I: The fishing vessel was scuttled in the Bay of Biscay 10 nmi south south east of the Île d'Yeu, Vendée (46.5°N, -2.23333°W) by SMU UC-70 . Her crew survived.
 * SS Greypoint ( undefined): World War I: The coaster was torpedoed and sunk in the English Channel 2 nmi south east by south of Broadstairs, Kent by a Kaiserliche Marine torpedo boat.
 * FRENCH PATROL VESSEL Hyacinthe Yvonne : World War I: The Q-ship was sunk in the Bay of Biscay off La Pallice, Charente-Maritime by SMU UC-70.
 * SS Illinois (1913) (🇺🇸 United States): World War I: The tanker was scuttled in the English Channel 20 nmi north of Alderney, Channel Islands by SMU UC-21 . Her crew survived.
 * SS Joshua Nicholson (1880) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean off Wolf Rock, Cornwall (49.61667°N, -6.61667°W) by SMU U-70 with the loss of 26 crew.
 * SS Lowlands (1888) ( undefined): World War I: The cargo ship struck a mine and sank in the North Sea off North Foreland, Kent. Her crew survived.
 * Madone (🇫🇷 France): World War I: The fishing vessel was scuttled in the Bay of Biscay west by south of Les Barges by SMU UC-70 . Her crew survived.
 * Marie Louise (🇫🇷 France): World War I: The fishing vessel was sunk in the English Channel 15 nmi north north west of Cap de la Hève, Manche (49.75°N, -0.08333°W) by SMU UB-18.
 * SS Pola (1898) ( undefined): World War I: The collier was torpedoed and sunk in the Atlantic Ocean 280 nmi west north west of Ouessant, Finistère, France (48.5°N, -12°W) by SMU U-81 with the loss of fiver of her crew.
 * SS Trevose (1896) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 230 nmi west by north of Ouessant (48.66667°N, -11.48333°W) by SMU U-81 . with the loss of two of her crew. Survivors were rescued by SS Alnwick Castle (1901) ( undefined).
 * SMU UB-6 : World War I: The Type UB I submarine was scuttled at Hellevoetsluis, Zeeland, Netherlands.
 * SS Victoria (1912) (🇸🇪 Sweden): World War I: The cargo ship was sunk in the Atlantic Ocean south west of Spain (36.85°N, -8.3°W) by SMU UC-67.

19 March

 * SS Alnwick Castle (1901) ( undefined): World War I: The Union-Castle passenger ship was torpedoed and sunk in the Atlantic Ocean 310 nmi west of the Bishop Rock, Isles of Scilly (47.63333°N, -13.4°W) by SMU U-81 with the loss of 40 lives.
 * SS Angiolina (1897) ( undefined): World War I: The cargo ship was torpedoed and damaged in the Mediterranean Sea off Elba (42.68333°N, 10.6°W) by SMU U-34 (Germany) . She was beached but was later refloated.
 *  Armoricain (🇫🇷 France): World War I: The three-masted schooner was shelled and sunk in the English Channel 20 nmi south west of Dodman Point, Cornwall, United Kingdom(49.88333°N, -4.71667°W) by SMU UC-66 . Her crew survived.
 * SS Bergsli (1892) (🇳🇴 Norway): World War I: The cargo ship struck a mine and sank in the Bay of Biscay off the Chassiron Lighthouse, Charente-Maritime, France with the loss of four of her crew.
 * SS Brode (1905) (🇳🇴 Norway): World War I: The cargo ship was sunk in the Atlantic Ocean 28 nmi south south east of Ar Men, Finistère by SMU UC-36 with the loss of a crew member.
 * SS Charlois (1888) (🇳🇱 Netherlands): World War I: The tanker was sunk in the North Sea (57.35°N, 4.55°W) by SMU U-59 with the loss of all hands.
 * FRENCH BATTLESHIP Danton : World War I: The was torpedoed and sunk in the Mediterranean Sea 30 nmi off San Pietro Island (38.75972°N, 8.05833°W) by SMU U-64 (Germany)  with the loss of 296 of her 1,102 crew. Survivors were rescued by FRENCH DESTROYER Massue and various patrol vessels (all ).
 * SS Frinton (1912) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 320 nmi north west of Ouessant, Finistère, France (approximately 48°N, -13°W) by SMU U-81 with the loss of four of her crew.
 * SS Kong Inge (1909) (🇳🇴 Norway): World War I: The coaster was sunk in the Bay of Biscay 4 nmi south west by west of Brest, Finistère, France (47.96667°N, -4.6°W) by SMU UC-36 . Her crew survived.
 * SS Michel (1881) (🇫🇷 France): World War I: The cargo ship struck a mine and sank in the Bay of Biscay off the Chassiron Lighthouse.
 * HMS Paragon (1913) World War I: The Acasta-class destroyer was torpedoed and sunk in the Strait of Dover in a battle with eight torpedo boats (all ).
 * SS Pollux (1907) (🇳🇴 Norway): World War I: The cargo ship was sunk in the North Sea 60 nmi north north east of Girdleness, Aberdeenshire, United Kingdom (57.91667°N, -1.16667°W) by SMU UC-45 with the loss of sixteen lives.
 * Rhodora (🇫🇷 France): World War I: The fishing vessel was scuttled in the English Channel off Boulogne, Pas-de-Calais (50.4°N, 1.31667°W) by SMU UC-17 . Her crew survived.
 * HMT Valpa : World War I: The naval trawler struck a mine and sank in the North Sea off Spurn Head, Yorkshire (53.55833°N, 0.16667°W) with the loss of three of her crew.

20 March

 *  ( undefined): World War I: The hospital ship was damaged in the English Channel 6 nmi off Start Point, Devon by SMU UC-66 with the loss of 35 lives. She was beached and was later salvaged.
 * SS Frisk (1883) (🇳🇴 Norway): World War I: The cargo ship was sunk in the North Sea 85 nmi north east of Coquet Island, Northumberland, United Kingdom by SMU UC-50 with the loss of seven of her crew.
 * SS Gurre (1891) (🇩🇰 Denmark): World War I: The cargo ship was sunk in the North Sea (58.43333°N, 1.2°W) by SMU U-59 with the loss of 21 crew.
 * SS Hazelpark (1916) ( undefined): World War I: The cargo ship was torpedoed and sunk in the English Channel 3 nmi south by east of Start Point, Devon by SMU UC-66 . Her crew survived.
 *  Paul et Marie (🇫🇷 France): World War I: The three-masted schooner was shelled and sunk in the Mediterranean Sea north east of Cape Corse, Corsica (43.46667°N, 9.58333°W) by SMU U-34 (Germany) with the loss of six crew.

21 March

 * Avance ( undefined): World War I: The fishing smack was shelled and sunk in the English Channel 25 nmi west south west of Portland Bill, Dorset by SMU UC-66 . Her crew survived.
 * SS Healdton (🇺🇸 United States): World War I: The tanker was torpedoed and sunk in the North Sea with the loss of at least seven of her crew.
 * SS Hindustan (1912) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 150 nmi north west of the Fastnet Rock (51.41667°N, -13.5°W) by SMU U-46 with the loss of two crew.
 *  Najade (🇳🇴 Norway): World War I: The full-rigged ship was torpedoed and sunk in the Atlantic Ocean off Fair Isle, United Kingdom (59.58333°N, -2.28333°W) by SMU U-59 with the loss of all 21 crew.
 * SS Rio Sorocaba (1906) ( undefined): World War I: The cargo ship was scuttled in the Atlantic Ocean 10 nmi south east of the Eddystone Lighthouse (50.06667°N, -4.21667°W) by SMU UC-48 . Her crew survived.
 * SS Stanley (1914) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 230 nmi west by north of the Fastnet Rock (50.83333°N, -16°W) by SMU U-24 with the loss of three crew.

22 March

 * SS Attika (1891) (🇳🇴 Norway): World War I: The cargo ship was sunk in the Atlantic Ocean north west of Ireland (54.83333°N, -12.83333°W) by SMU U-81 . Her crew survived.
 * Efeu (🇳🇴 Norway): World War I: The sailing vessel wassunk in the English Channel 10 nmi west south west of Dungeness, Kent, United Kingdom by SMU UC-66 . Her crew survived.
 * SS Chorley (1901) ( undefined): World War I: The cargo ship was torpedoed and sunk in the English Channel 25 nmi east by south of Start Point, Devon (50.23333°N, -3.03333°W) by SMU UC-48 . Her crew survived.
 * Curlew ( undefined): World War I: The fishing smack was scuttled in the English Channel 14 nmi south of Berry Head, Devon by SMU UC-17 . Her crew survived.
 * SS Egenaes (1894) (🇳🇴 Norway): World War I: The coaster was sunk in the North Sea 10 nmi east of Peterhead, Aberdeenshire, United Kingdom by SMU UC-45 with the loss of five of her crew.
 * SS Hugin (1901) (🇳🇴 Norway): World War I: The cargo ship was sunk in the Atlantic Ocean 10 nmi south of Ar Men, Finistère, France by SMU UC-36 . Her crew survived.
 * SS Malmanger (1917) (🇳🇴 Norway): World War I: The tanker struck a mine and sank in the Atlantic Ocean 2 nmi south of Baltimore, County Cork, United Kingdom (51.38333°N, -9.5°W). Her crew survived.
 * SS Providence (1903) ( undefined): World War I: The cargo ship struck a mine and sank in St. George's Channel 1.25 nmi south by west of the Barrels Lightship ( undefined). Her crew survived.
 * SS Rio Colorado (1903) ( undefined): World War I: The cargo ship struck a mine and sank in the North Sea off the mouth of the River Tyne with the loss of ten of her crew.
 * SS Rotorua (1910) ( undefined): World War I: The cargo ship was torpedoed and sunk in the English Channel 24 nmi east of Start Point, Devon (50.28333°N, -3.11667°W) by SMU UC-17 with the loss of a crew member.
 *  Sirius (🇳🇴 Norway): World War I: The barque was scuttled in the North Sea (58.66667°N, 1.83333°W) by SMU U-57 with the loss of a crew member.
 * SS Stuart Prince (1899) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 85 nmi west by north of Broadhaven, County Cork (55.46667°N, -11.33333°W) by SMU U-66 with the loss of twenty crew.
 * SS Susanna (1889) (🇳🇴 Norway): World War I: The coaster was cuttled in the North Sea 6 nmi south east by south of Aberdeen (57.06667°N, -1.9°W) by SMU UC-45 . Her crew survived.
 *  Svendsholm (🇳🇴 Norway): World War I: The full-rigged ship was shelled and sunk in the Atlantic Ocean west of the Fastnet Rock (50.56667°N, -15.75°W) by SMU U-24 . Her crew survived.

23 March

 * SS Achille Adam (1887) ( undefined): World War I: The coaster was scuttled in the English Channel 31 nmi south east by east of Beachy Head, East Sussex by SMU UB-39 with the loss of six of her crew.
 * SS Amstelstroom (1910) (🇳🇱 Netherlands): World War I: The cargo ship was shelled and damaged in the North Sea by SMS G86, SMS G87 and SMS V44 (all ). The derelict vessel was sunk on 27 March 20 nmi east north east of the Noord Hinder Lightship (🇳🇱 Netherlands) by SMU UB-10.
 *  Argo (🇵🇹 Portugal): World War I: The full-rigged ship was scuttled in the Atlantic Ocean (47.76667°N, -10.75°W) by SMU U-46.
 * SS Artemis (1884) (🇬🇷 Greece): World War I: The coaster was sunk in the Tyrrhenian Sea off Porto Ercole, Tuscany, Italy (42.36667°N, 11.36667°W) by SMU U-34 (Germany) . Her crew survived.
 * SS Bellatrix (1907) (🇳🇴 Norway): World War I: The cargo ship was sunk in the Tyrrhenian Sea 6 nmi off Civitavecchia, Lazio, Italy by SMU U-34 (Germany) . Her crew survived.
 * SS Blomwaag (1891) (🇳🇴 Norway): World War I: The coaster was sunk in the North Sea (51.66667°N, 1.33333°W by SMU UC-45 . Her crew survived.
 * SS Clan Macmillan (1901) ( undefined): World War I: The cargo ship was torpedoed and sunk in the English Channel 10 nmi west of Beachy Head (50.68333°N, -0.01667°W) by SMU UB-39 . Her crew survived.
 * SS Eptalofos (1911) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 47 nmi north west of Malta (36.66667°N, 13.13333°W) by SMU U-64 (Germany) . Her crew survived, but eight survivors were taken as prisoners of war.
 * SS Exchange (1884) ( undefined): World War I: The coaster was shelled and sunk in the English Channel 30 nmi north west of Cayeux-sur-Mer, Somme, France by SMU UB-39 with the loss of eight crew.
 * HMS Laforey (1913) The Laforey-class destroyer struck a mine and sank in the English Channel off Boulogne, Pas de Calais, France (50.91667°N, 0.45°W) with the loss of 59 of her 77 crew.
 * SS Maine (1905) ( undefined): World War I: The cargo ship was torpedoed and sunk in the English Channel 9.5 nmi south south west of Dartmouth, Devon (50.2°N, -3.88333°W) by SMU UC-17 . Her crew survived.
 * SS Noli (1878) ( undefined): World War I: The cargo ship was sunk in the Tyrrhenian Sea off Civitavecchia (42.18333°N, 11.61667°W) by SMU U-34 (Germany) . Her crew survived.
 * Queenborough ( undefined): World War I: The trawler was shelled and sunk in the North Sea 106 nmi east of Peterhead, Aberdeenshire (57.46667°N, 1.53333°W) by SMU U-86 . Her nine crew took to the lifeboats but were not rescued.
 * Tres Fratres (🇳🇱 Netherlands): World War I: The trawler was scuttled in the North Sea (57.5°N, 6.16667°W) by SMU U-62 . Her crew survived.

24 March

 * Alice ( undefined): World War I: The fishing smack was scuttled in the Atlantic Ocean 12 nmi south south west of the Eddystone Lighthouse (49.98333°N, -4.28333°W) by SMU UC-17 . Her crew survived.
 * Boy Walter ( undefined): World War I: The fishing smack was scuttled in the Atlantic Ocean 15 nmi south east of the Eddystone Lighthouse by SMU UC-17 . Her crew survived.
 *  Bruyère (🇫🇷 France): World War I: The schooner was scuttled in the Irish Sea off South Stack, Anglesey, United Kingdom (53.33333°N, -5.16667°W) by SMU UC-65 . Her crew survived.
 * Emanuela ( undefined): World War I: The sailing vessel was sunk in the Malta Channel by SMU UC-38.
 * Endeavour ( undefined): World War I: The fishing smack was scuttled in the Atlantic Ocean 15 nmi south east of the Eddystone Lighthouse by SMU UC-17 . Her crew survived.
 * Enigma ( undefined): World War I: The fishing smack was scuttled in the Atlantic Ocean 15 nmi south east of the Eddystone Lighthouse by SMU UC-17 . Her crew survived.
 * SS Ennistown (1908) ( undefined): World War I: The coaster was scuttled in St. George's Channel 10 nmi south east of the South Arklow Lightship ( undefined) by SMU UC-65 . Her crew survived.
 * SS Fairearn (1915) ( undefined): World War I: The coaster was torpedoed and sunk in the Irish Sea 16 nmi west north west of South Stack by SMU UC-65 . Her crew survived.
 * SS Fulmar (1902) ( undefined): World War I: The cargo ship struck a mine and sank in the Thames Estuary 8 nmi south west of the Kentish Knock Lightship ( undefined) with the loss of a crew member.
 * SS Grenmar (1884) (🇳🇴 Norway): World War I: The cargo ship was sunk in the North Sea 34 nmi north by east of St Abb's Head, Berwickshire, United Kingdom by SMU UC-77 . Her crew survived.
 * H.C.G. ( undefined): World War I: The fishing smack was scuttled in the Atlantic Ocean 15 nmi south east of the Eddystone Lighthouse by SMU UC-17 . Her crew survived.
 *  Howe ( undefined): World War I: The schooner was scuttled in St. George's Channel 4 nmi north east by east of the South Arklow Lightship ( undefined) by SMU UC-65 . Her crew survived.
 * SS Korsnaes (1891) (🇳🇴 Norway): World War I: The coaster was scuttled in the Irish Sea 3 nmi west south west of Bardsey Island, Pembrokeshire, United Kingdom by SMU UC-65 . Her crew survived.
 * FRENCH TRAWLER L'Amerique : World War I: The naval trawler was torpedoed and sunk in the Ras de Sein by SMU UC-36 with the loss of all 26 hands.
 * May Flower ( undefined): World War I: The fishing smack was scuttled in the Atlantic Ocean 15 nmi south east of the Eddystone Lighthouse by SMU UC-17 . Her crew survived.
 * SS Montreal (1896) (🇫🇷 France): World War I: The cargo ship was torpedoed and damaged in the Atlantic Ocean 77 nmi off Cape Ortegal, Spain (45.66667°N, -7.66667°W) by SMU U-46 with the loss of 22 crew. She sank on 26 March, One survivor was rescued by a Royal Navy patrol boat.
 * Qui Vive ( undefined): World War I: The fishing smack was scuttled in the Atlantic Ocean 15 nmi south east of the Eddystone Lighthouse by SMU UC-17 . Her crew survived.
 * Reindeer ( undefined): World War I: The fishing smack was scuttled in the Atlantic Ocean 15 nmi south east of the Eddystone Lighthouse by SMU UC-17 . Her crew survived.
 * Satanita ( undefined): World War I: The fishing smack was scuttled in the Atlantic Ocean 12 nmi south south west of the Eddystone Lighthouse by SMU UC-17 . Her crew survived.
 * ST Tapir (🇫🇷 France): World War I: The tug struck a mine and sank in the Bay of Biscay off Groix, Morbihan (47.66667°N, -3.56667°W) with the loss of fifteen of her crew.

25 March

 * SS Adenwen ( undefined): World War I: The cargo ship was torpedoed and sunk in the Irish Sea 6 nmi south east by east of the North Arklow Lightship ( undefined) by a kaiserliche Marine submarine with the loss of ten of her crew.
 * SS Baynaen (1904) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Bay of Biscay 20 nmi north west by west of Belle Île, Morbihan, France (47.56667°N, -3.66667°W) by SMU UC-36 with the loss of five of her crew.
 * SS Berbera (1905) ( undefined): World War I: The cagro ship was torpedoed and sunk in the Mediterranean Sea 60 nmi east of Catania, Sicily, Italy (37.53333°N, 15.13333°W) by SMU U-64 (Germany) with the loss of a crew member. Three survivors were taken as prisoners of war.
 *  Brandon ( undefined): World War I: Teh barque was scuttled in the Irish Sea by SMU UC-65 . Her four crew took to the lifeboats but were not rescued.
 * SS C. Sundt (1901) (🇳🇴 Norway): World War I: The cargo ship was sunk in the North Sea east of the Shetland Islands, United Kingdom by SMU U-81 . Her fifteen crew took to the lifeboats but were not rescued.
 * Etoile de la Mer (🇫🇷 France): World War I: The fishing vessel was sunk in the Seine Estuary by SMU UB-40.
 * Etoile Polaire (🇫🇷 France): World War I: The fishing vessel was sunk in the Bay of Biscay 15 nmi south west of Groix, Morbihan by SMU UC-36.
 * HMT Evangel : World War I: The naval trawler struck a mine and sank in the Irish Sea off Milford Haven, Pembrokeshire with the loss of fifteen of her crew.
 * Felix Faure (🇫🇷 France): World War I: The fishing vessel was sunk in the Seine Estuary by SMU UB-40.
 *  Fringante (🇫🇷 France): World War I: The schooner was scuttled in the Irish Sea by SMU UC-65 . Her crew survived.
 * SS Garant (1904) (🇳🇴 Norway): World War I: The coaster was sunk in the North Sea east of the Shetland Islands by SMU U-81 . Her fourteen crew took to the lifeboats bu were not rescued.
 * HMT Hilary II : World War I: The naval trawler struck a mine and sank in the North Sea (51.475°N, 1.4°W) with the loss of eight of her crew.
 * Huntleys ( undefined): World War I: The sailing vessel was scuttled in the English Channel 28 nmi south south west of Beachy Head, East Sussex by SMU UC-69 . Her crew survived.
 * Immacolata ( undefined): World War I: The sailing vessel was sunk in the Strait of Messina by SMU U-64 (Germany).
 * Industria ( undefined): World War I: The trawler was sunk off the coast of Scotland by SMU UC-75 with the loss of all nine crew.
 * SS Laly (1894) (🇳🇴 Norway): World War I: The cargo ship was scuttled in the North Sea east of the Shetland Islands by SMU U-81 . Her nineteen crew took to the lifeboats but were not rescued.
 *  Leontine (🇫🇷 France): World War I: The brigantine was shelled and sunk in the Bay of Biscay 5 nmi south of Groix by SMU UC-36 with the loss of six of her crew.
 * Louise (🇫🇷 France): World War I: The fishing vessel was sunk in the Seine Estuary by SMU UB-40.
 * Marie Louise (🇫🇷 France): World War I: The fishing vessel was sunk in the English Channel 9 nmi north north west of Port-en-Bessin, Calvados by SMU UB-40.
 * SS Marshall (1904) (🇳🇴 Norway): World War I: The cargo ship was sunk in the North Sea 17 nmi east of Peterhead, Aberdeenshire, United Kingdom by SMU UC-75 . Her crew survived.
 *  Mary Annie ( undefined): World War I: The three-masted schooner was scuttled in the English Channel 28 nmi south south west of Beachy Head by SMU UC-69 . Her crew survived.
 * Median ( undefined): World War I: The trawler was scuttled in the North Sea 30 nmi east by south of Aberdeen by SMU UC-75 . Her crew survived.
 * SS Poseidon (1893) (🇬🇷 Greece): World War I: The cargo ship was sunk in the Irish Sea (52.45°N, -5.2°W) by SMU UC-65 . Her crew survived.
 * Prince of Wales ( undefined): World War I: The trawler was scuttled in the North Sea 17 nmi east by south of Girdle Ness, Aberdeenshire (57.16667°N, -1.53333°W) by SMU UC-77 . Her crew survived.
 * SS Queen Eugenie (1909) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 23 nmi north north east of the Cani Rocks, Tunisia (37.95°N, 9.78333°W) by SMU UC-67 with the loss of 35 of her crew. Two survivors were taken as prisoners of war.
 * Roslyn ( undefined): World War I: The trawler was shelled and sunk in the North Sea 54 nmi east of Girdle Ness, Aberdeenshire by SMU UC-75 . Her crew survived.
 * Saint Joseph (🇫🇷 France): World War I: The fishing vessel was sunk in the Seine Estuary by SMU UB-40.
 * SS Vellore (1896) ( undefined): World War I: The collier was torpedoed and sunk in the Mediterranean Sea 21 nmi north west by north of Alexandria, Egypt by SMU U-63 (Germany) . Her crew survived, but two were taken as prisoners of war.

26 March

 * SS Ceres ( undefined): The cargo ship ran aground off Terschelling, Friesland, Netherlands. She was declared a total loss on 4 April.
 * SS Cerne (1915) ( undefined): World War I: The cargo ship struck a mine and sank in the Thames Estuary. Her crew survived.
 * SS Ledbury (1892) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 90 nmi north by east of Benghazi, Libya by SMU UB-43 with the loss of three of her crew.
 * L. Rahmanich (🇪🇬 Egypt): World War I: The sailing vessel was sunk in the Mediterranean Sea between Alexandria and Port Said by SMU U-63 (Germany).
 * HMS Myrmidon (1900) : The Myrmidon-class destroyer collided with SS Hamborn ( undefined and sank in the English Channel off Dungeness, Kent with the loss of a crew member. Survivors were rescued by HMS Mermaid (1898) and SS Tambour ( undefined).
 * SS Norma (1885) (🇸🇪 Sweden): World War I: The cargo ship was sunk in the English Channel 9 nmi north of Île Vierge by SMU UC-69 . Her crew survived.

27 March

 * SS Aasta (1902) (🇳🇴 Norway): World War I: The cargo ship was sunk in the Atlantic Ocean 3 nmi south west of Ar Men, Finistère, France by SMU UC-69 . Her crew survived.
 * SS Don Benito ( undefined): The collier collided with SS Ultonia ( undefined) and sank in the Atlantic Ocean (49.58333°N, -6.73333°W).
 * Galatia ( undefined): World War I: The fishing vessel was scuttled in the North Sea 30 nmi south south west of Buchan Ness, Aberdeenshire by SMU UC-77 . Her crew survived.
 * SS Glenogle (1916) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 207 nmi south west of the Fastnet Rock (48.33333°N, -12°W) by SMU U-24 . Her crew survived.
 * SS Grib (1905) (🇳🇴 Norway): World War I: The cargo ship was sunk in the Atlantic Ocean 7 nmi west of Ar Men by SMU UC-69 . Her crew survived.
 * SS Holgate (1896) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 10 nmi north west of the Skellig Islands, County Kerry by SMU U-57 . Her crew survived.
 * SS Kelvinhead (1905) ( undefined): World War I: The cargo ship struck a mine and sank in Liverpool Bay 0.75 nmi west south west of the Liverpool Bar Lightship. Her crew survived.
 *  Neath ( undefined): World War I: The auxiliary barque was torpedoed and sunk in the Atlantic Ocean 28 nmi south by east of the Fastnet Rock by SMU U-66 . Her crew survived, but her captain was taken as a prisoner of war.
 * SS Nova (1915) (🇳🇴 Norway): World War I: The cargo ship was sunk in the North Sea 18 nmi off Girdle Ness by SMU UC-77 . Her crew survived.
 * SS Sandvik (1910) (🇳🇴 Norway): World War I: The coaster was sunk in the North Sea 7 nmi off Tod Head, Aberdeenshire by SMU UC-77 . Her crew survived.
 * SS Thracia (1898) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Bay of Biscay 12 nmi north of Belle Île, Morbihan, France (47.51667°N, -3.28333°W) by SMU UC-69 with the loss of 36 of her crew.
 * FRENCH GUNBOAT 62 : World War I: The gunboat was sunk in the Mediterranean Sea west of Bizerte, Algeria by SMU UC-37.

28 March

 * Antonietta R. ( undefined): World War I: The sailing vessel was sunk in the Tyrrhenian Sea off Capo Palinuro, Calabria by SMU U-34 (Germany).
 * SS Ardglass (1914) ( undefined): World War I: The coaster was scuttled in the Irish Sea 4 nmi east of the South Arklow Lightship ( undefined) (52.23333°N, -5.85°W) by SMU UC-65 . Her crew survived.
 * SS Cannizaro (1914) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 145 nmi south west of the Fastnet Rock (49°N, -10°W) by SMU U-24 . Her crew survived.
 * Carlo T ( undefined): World War I: The sailing vessel was sunk in the Tyrrhenian Sea off Capo Palinuro by SMU U-34 (Germany).
 * SS Dagali (1909) (🇳🇴 Norway): World War I: The coaster was sunk in the Irish Sea 5 nmi north east of the South Arklow Lightship ( undefined) by SMU UC-65 . Her crew survived.
 * Expedient ( undefined): World War I: The trawler was scuttled in the North Sea by SMU UC-75 with the loss of all nine crew.
 * SS Gafsa (1903) ( undefined): World War I: The tanker was torpedoed and sunk in the Atlantic Ocean 10 nmi south east of the Old Head of Kinsale, County Cork by SMU U-57 with the loss of seven crew.
 * Giuseppina ( undefined): World War I: The sailing vessel was sunk in the Tyrrhenian Sea off Capo Palinuro by SMU U-34 (Germany).
 *  Giuseppina Rosa ( undefined): World War I: The brigantine was scuttled in the Tyrrhenian Sea by SMU U-34 (Germany).
 *  Harvest Home (🇮🇲 Isle of Man): World War I: The schooner was shelled and sunk in the Irish Sea 4 nmi north east of the South Arklow Lightship ( undefined) by SMU UC-65 . Her crew survived.
 * ST Hero ( undefined): World War I: The tug struck a mine and sank in the North Sea off the mouth of the River Wear with the loss of a crew member.
 * SS Katina (1891) (🇬🇷 Greece): World War I: The cargo ship was torpedoed and sunk in the Bay of Biscay 10 nmi north west of the Île d'Yeu, Vendée, France (46.78333°N, -2.46667°W) by SMU UC-69 . Her crew survived.
 *  Laima ( undefined): World War I: The schooner was sunk in the Irish Sea 10 nmi south east of the Codling Lightship by SMU UC-65.
 * La Maria ( undefined): World War I: The sailing vessel was sunk in the Tyrrhenian Sea by SMU U-34 (Germany).
 * Moulmein ( undefined): World War I: The trawler was scuttled in the North Sea 25 nmi north east of the Longstone Lighthouse, Northumberland by SMU UC-77 . Her crew survived.
 * SS Oakwell (1887) ( undefined): World War I: The coaster was torpedoed and sunk in the North Sea 3 nmi north east of Robin Hood's Bay, Yorkshire by SMU UB-22 with the loss of four crew.
 * Pietro Lofaro ( undefined): World War I: The sailing vessel was sunk in the Tyrrhenian Sea off Capo Palinuro by SMU U-34 (Germany).
 * Raffaele ( undefined): World War I: The sailing vessel was sunk in the Tyrrhenian Sea off Capo Palinuro by SMU U-34 (Germany).
 * SS Ruby (1882) ( undefined): World War I: The coaster struck a mine and sank in the North Sea 2.5 nmi off Auskerry Orkney Islands with the loss of six of her crew.
 * South Arklow Lightship ( undefined): World War I: The lightship was scuttled in the Irish Sea 1.5 nmi west of Hook Point, County Waterford by SMU UC-65 . Her crew survived.
 * SS Snowdon Ranger (1906) ( undefined): World War I: The cargo ship was torpedoed and sunk in St. George's Channel 25 nmi west of Bardsey Island, Pembrokeshire (52.6°N, -5.56667°W) by SMU UC-65 with the loss of four of her crew.
 * SS Tizona (1901) (🇳🇴 Norway): World War I: The cargo ship was sunk in the North sea 34 nmi north by east of the Longstone Lighthouse by SMU UC-77 . Her crew survived.
 *  Urania (🇳🇴 Norway): World War I: The barque was sunk in the North Sea 12 nmi east of Copinsay, Orkney Islands by SMU UC-42 with the loss of seven of her crew.
 * SS Wychwood (1907) ( undefined): World War I: The collier was torpedoed and sunk in the Irish Sea 4 nmi south south west of the South Arklow Lightship ( undefined) (52.66667°N, -5.91667°W) by SMU UC-65 with the loss of three of her crew.

29 March

 * SS Bywell (1913) ( undefined):World War I: The cargo ship was torpedoed and sunk in the North Sea 3 nmi east of Scarborough, Yorkshire (54.28333°N, -0.3°W) by SMU UB-21 . Her crew survived.
 *  Conoid ( undefined): World War I: The schooner was shelled and sunk in the English Channel 3.5 nmi north of the Barfleur Lighthouse, Manche, France by SMU UB-40 . Her crew survived.
 * SS Crispin (1907) ( undefined): World War I: World War I: The cargo liner was torpedoed and sunk in the Atlantic Ocean 14 nmi south of Hook Point, Waterford by SMU U-57 with the loss of eight crew.
 * Irma (🇫🇷 France): World War I: The sailing vessel was sunk in the English Channel off Cap Barfleur, Manche by SMU UB-40 . Her crew survived.
 * SS Kathleen Lily (1872) ( undefined): World War I: The coaster was sunk in the North Sea 2 nmi east of Robin Hood's Bay, Yorkshire (54.45°N, -0.46667°W) by SMU UC-30 with the loss of four of her crew.
 * SS Lincolnshire (1899) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 8 nmi south west by south of Hook Point (52°N, -7°W) by SMU U-57 . Her crew survived.
 * SS Mascota ( undefined): World War I: The coaster was torpedoed and sunk in the North Sea 8 nmi east of Lowestoft, Suffolk by a Kaiserliche Marine torpedo boat with the loss of seven of her fourteen crew. Survivors were taken as prisoners of war.
 * SS Morild I (1883) (🇳🇴 Norway): World War I: The cargo ship was scuttled in the Bay of Biscay 3 nmi off Hourtin, Gironde, France by SMU UC-69 . Her crew survived.
 * SS Os (1916) (🇳🇴 Norway): World War I: The coaster was sunk in the Atlantic Ocean 2 nmi north west by north of Noup Head, Orkney Islands, United Kingdom by SMU U-60 . Her crew survived.
 * SS Schaldis (1878) (🇧🇪 Belgium) The cargo ship was torpedoed and sunk in the North Sea 6 nmi north north east of Whitby, Yorkshire, United Kingdom by SMU UC-75.

30 March

 * SS Avanguardia (1889) ( undefined): World War I: The cargo ship was scuttled in the Bay of Biscay 15 nmi off the Contis les Bains Lighthouse, Pyrenées-Atlantiques by SMU UC-69 . Her crew survived.
 * SS Britta (1889) (🇳🇴 Norway): World War I: The cargo ship was scuttled in the Bay of Biscay 14 nmi north of the Contis les Bains Lighthouse by SMU UC-69 . Her crew survived.
 * HMT Christopher : World War I: The naval trawler struck a mine and sank in the North Sea off Southwold, Suffolk (52.43333°N, 1.8°W) with the loss of five of her crew.
 * Dee ( undefined): World War I: The sailing vessel was scuttled in the Pacific Ocean 410 nmi west by south of Cape Leeuwin, Western Australia by SMS Möwe.
 * Endymion ( undefined): World War I: The sailing vessel was sunk in the English Channel by a Kaiserliche Marine submarine with the loss of four of her crew.
 * SS Harberton (1894) ( undefined): World War I: The cargo ship struck a mine and sank in the North Sea with the loss of fifteen of her crew.
 * Michelina Catalano ( undefined): World War I: The sailing vessel was sunk in the Mediterranean Sea north of Sicily by SMU U-52.
 * Petrel ( undefined): World War I: The trawler was scuttled in the North Sea 120 nmi east of Aberdeen (57°N, 1.5°W) by SMU UC-77 . Her crew survived.
 * FRENCH TRAWLER Saint Louis III : World War I: The naval trawler struck a mine and sank off Saint Valery with the loss of sixteen of her crew.
 * Sarcelle (🇫🇷 France): World War I: The sailing vessel struck a mine and sank in the English Channel off Dieppe, Seine-Maritime.
 * SS Somme (1916) ( undefined): World War I: The cargo ship was torpedoed and sunk in the English Channel 20 nmi east by north of Cap Barfleur, Manche, France (49.8°N, -0.68333°W) by SMU UB-40 with the loss of five of her crew.

31 March

 *  Boaz ( undefined): World War I: The ketch was scuttled in the English Channel 15 nmi north of Cap Barfleur, Manche, France by SMU UB-32 . Her crew survived.
 * SS Braefield (1892) ( undefined): World War I: The coaster was sunk in St. George's Channel off Milford Haven, Pembrokeshire by SMU U-57 with the loss of all ten crew.
 * SS Brodness (1894) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Tyrrhenian Sea 5 nmi west north west of Anzio, Lazio, Italy (41.46667°N, 12.43333°W) by SMU UC-38 . Her crew survived.
 * SS Farmand (1900) (🇳🇴 Norway): World War I: The cargo ship was sunk in the Bay of Biscay 6 nmi north of Punta Galea, Biscay, Spain by SMU UC-69 . Her crew survived.
 * HMT Forward III : World War I: The naval trawler struck a mine and sank in the North Sea south of the Shipwash Lightship ( undefined) (51.95833°N, 1.80833°W) with the loss of ten of her crew.
 * SS Galatee (1908) (🇫🇷 France): World War I: The cargo ship was torpedoed and damaged in the Mediterranean Sea east of Cape Corbelin, Algeria (36.88333°N, 5.01667°W) by SMU UC-37 . She was beached at Sidi Kralem but was later refloated.
 *  Gippeswic ( undefined): World War I: The ketch was scuttled in the English Channel 15 nmi north of Barfleur, Manche by SMU UB-32 . Her crew survived.
 *  : World War I: The hospital ship was torpedoed and damaged in the English Channel off the Isle of Wight by SMU UB-32 with the loss of three crew.  She was subsequently repaired and returned to service.
 * SS Hestia (1916) World War I: The tanker was sunk in the North Sea 31 nmi west of the Maas Lightship (🇳🇱 Netherlands) by SMU UB-23.
 * SS Lisbeth (1915) (🇳🇴 Norway): World War I: The cargo ship was sunk in the North Sea north east of the Noord Hinder Lightship (🇳🇱 Netherlands) by SMU UB-23 . Her crew survived.
 *  Primrose ( undefined): World War I: The schooner was shelled and sunk in the English Channel 35 nmi south west of Start Point, Devon by SMU UC-71 with the loss of a crew member.

Unknown date

 * SS Acton ( undefined): World War I: The cargo ship was sunk in the English Channel by a Kaiserliche Marine submarine.
 * SMU U-85 : The Type U 81 submarine foundered in the North Sea with the loss of all 38 crew after 7 March.