List of shipwrecks in March 1918

The list of shipwrecks in March 1918 includes ships sunk, foundered, grounded, or otherwise lost during March 1918.

1 March

 * SMS A57 : World War I: The A56-class torpedo boat struck a mine and sank in the North Sea with the loss of twelve of her crew.
 * SS Borga (1907) ( undefined): World War I: The cargo ship was torpedoed and sunk in the English Channel 9 nmi south east by south of Beer Head, Devon (50.53333°N, -2.93333°W) by SMU U-55 with the loss of 5 crew.
 * HMS Calgarian (1913) : World War I: The armed merchant cruiser was torpedoed and sunk in the Irish Sea off Rathlin Island, County Antrim (55.41667°N, -6.25°W) by SMU U-19 with the loss of 49 crew.
 * SS Norefos (1914) : World War I: The supply vessel was scuttled in the Atlantic Ocean 60 nmi off Dakar, French West Africa.
 * SS Penvearn (1906) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Irish Sea 15 nmi north of South Stack, Anglesey (53.58333°N, -4.81667°W) by SMU U-105  with the loss of 21 crew.
 * Sunrise ( undefined): The ketch struck a submerged wreck and sank.
 * HMT Thomas Collard : World War I: The naval trawler was sunk by the force of the explosions of the torpedoes that sunk HMS Calgarian (1913), which was a victim of SMU U-19 (Germany) . Her crew survived.
 * SMU UB-54 : World War I: The Type UB III submarine departed for a patrol in the English Channel. No further trace, lost with all 29 crew, possibly off Brighton, East Sussex, United Kingdom.

2 March

 * Bessy (🇮🇲 Isle of Man): World War I: The coaster was shelled and sunk in the Irish Sea 12 nmi north west of Peel by SMU U-91 and SMU U-105 (both ). Her crew survived.
 * SS Carmelite (1892) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Irish Sea 10 nmi south west of the Calf of Man, Isle of Man (54°N, -4.86667°W) by SMU U-105 with the loss of two of her crew.
 * SS Euxeinos (1901) (🇬🇷 Greece): World War I: The cargo ship was sunk in the Mediterranean Sea (32.28333°N, 32.05°W) by SMU UB-53.
 * HMS H5 : World War I: The H-class submarine was rammed and sunk by SS Rutherglen ( undefined), which mistook her for a U-boat. All 22 crew were killed.
 * SS Havna (🇳🇴 Norway): World War I: The cargo ship was sunk in the Irish Sea 20 nmi east south east of the Tuskar Rock by SMU UB-65 with the loss of eleven of her eighteen crew.
 * SS Kenmare (1895) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Irish Sea 25 nmi north west of The Skerries, Isle of Anglesey by SMU U-104 with the loss of 29 crew.
 * Maria ( undefined): The schooner foundered with the loss of three of her crew.
 * SS Rockpool (1912) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 12 nmi north east by north of Eagle Island, County Mayo by SMU U-94 . Her crew survived, but her captain was taken as a prisoner of war.
 * SS Stina (1883) (🇸🇪 Sweden): World War I: The cargo ship was torpedoed, shelled and sunk in the Atlantic Ocean 8 nmi north by east of the Cairns of Coll, Argyllshire, United Kingdom (56.8°N, -6.5°W) by SMU U-22 (Germany) . Her crew survived.

3 March

 * Countess ( undefined): The vessel foundered in the English Channel off Deal, Kent. Her crew were rescued by the Deal Lifeboat.
 * Diamond ( undefined): The vessel foundered in the English Channel off Deal. Her crew were rescued by the Deal Lifeboat.
 * ''Eliza and Alice ( undefined): The vessel foundered in the English Channel off Deal. Her crew were rescued by the Deal Lifeboat.
 * Navator ( undefined): The vessel foundered in the English Channel off Deal. Her crew were rescued by the Deal Lifeboat.
 * SS Romeo (1881) ( undefined): World War I: The refrigerated cargo ship was torpedoed and sunk in the Irish Sea 11 nmi north west of Peel, Isle of Man (52.36667°N, -4.86667°W) by SMU U-102 with the loss of 26 of her 29 crew. The survivors were rescued by SS Ardgavel ( undefined) and HMS Kilgobnet.

4 March

 * SS Antioco Accame (1895) ( undefined): World War I: The cargo ship was sunk in the Atlantic Ocean west of Gibraltar (35.18333°N, -7.91667°W) by SMU U-155 . Her crew survived.
 * SS Castle Eden (1914) ( undefined): World War I: The collier was torpedoed and sunk in the Atlantic Ocean 4 nmi south south east of the Inishtrahull Lighthouse, County Donegal by SMU U-110 with the loss of a crew member.
 * SS Clan Macpherson (1905) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 24 nmi north of Cape Serrat, Tunisia (37.78333°N, 9.08333°W) by SMU UC-27 with the loss of eighteen of her crew.
 * SS Geneva ( undefined): The coaster struck a submerged wreck and was beached. She sank the next day.
 * SS Lady Londonderry ( undefined): The coaster collided with another vessel and sank.
 * SS Northfield (1901) ( undefined): World War I: The collier was torpedoed and sunk in the Bristol Channel 25 nmi south west of Lundy Island, Devon (50.92083°N, -4.75833°W) by SMU U-60 with the loss of fifteen crew.
 * SS Polkerris (1889) (🇫🇷 France): World War I: The cargo ship was sunk in the English Channel 10 nmi south east of Portland Bill, Dorset, United Kingdom by SMU UB-80 . Her crew survived.

5 March

 * SS Coalgas (1890) ( undefined): World War I: The cargo ship struck a mine and sank in the North Sea 5 nmi south by west of the Shipwash Lightship ( undefined). Her crew survived.
 * Edouard Marie (🇧🇪 Belgium): World War I: The fishing vessel was sunk in the Atlantic Ocean 5 nmi south of the Wolf Rock, Cornwall, United Kingdom (49.86667°N, -5.86667°W) by SMU UC-75.
 * SS Estrella (1912) ( undefined): World War I: The cargo ship struck a mine and sank in the North Sea 5 nmi south by west of the Shipwash Lightship ( undefined) with the loss of twenty of her crew.
 * SS Quarnero (1899) ( undefined): World War I: The cargo ship was sunk in the Atlantic Ocean 5 nmi north of Portreath, Cornwall, United Kingdom (50.35°N, -5.31667°W) by SMU U-60.
 * SS Roxburgh (1906) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 15 nmi east by north of Cape St. John, Crete, Greece by SMU UC-74 with the loss of six of her crew.
 * SS Tusnastabb (1916) (🇳🇴 Norway): World War I: The cargo ship struck a mine and sank in the North Sea south west of the Shipwash Lightship ( undefined) (51.95°N, 1.71667°W). Her crew survived.
 * SS Uskmoor (1912) ( undefined): World War I: The cargo ship was torpedoed and sunk in the English Channel 3 nmi south west of Prawle Point, Devon by SMU UB-80 . Her crew survived.
 * HMT William Tennant : The naval trawler collided with a British trawler and sank.

6 March

 * SS Daiten Maru (1889) (🇯🇵 Japan): World War I: The cargo ship was sunk in the Mediterranean Sea west of Sicily, Italy by SMU U-35 (Germany) . Her crew survived.
 * Elector (🇵🇹 Portugal): World War I: The sailing vessel was sunk in the Atlantic Ocean off Rio de Oro by SMU U-152.
 * HMS H5 : World War I: The H-class submarine was rammed and sunk in the Irish Sea by SS Rutherglen ( undefined, which mistook her for a Kaiserliche Marine U-boat. All 26 crew were killed.
 * SS Kalgan (1895) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 33 nmi south west of Jaffa, Occupied Enemy Territory Administration by SMU UB-53 with the loss of a crew member.
 * HMT Princess Alice : The naval trawler was lost in the Mediterranean Sea on this date.

7 March

 * SS Begona No.4 (1890) (🇪🇸 Spain): World War I: The cargo ship was shelled and sunk in the Mediterranean Sea 60 nmi north west of Marettimo, Italy by SMU U-35 (Germany).
 * SS Braatt II (1914) (🇳🇴 Norway): World War I: The cargo ship was torpedoed and sunk in the English Channel 7 nmi south west by south of St. Catherine's Point, Isle of Wight, United Kingdom (50.48333°N, -1.35°W) by SMU UB-30 . Her crew survived.
 * Brise (🇫🇷 France): World War I: The sailing vessel was shelled and sunk in the Atlantic Ocean 3.5 nmi north of Trevose Head, Cornwall, United Kingdom (50.6°N, -5.05°W) by SMU U-55.
 * SS Luigi (1896) ( undefined): World War I: The cargo ship was sunk in the Atlantic Ocean off Rio de Oro (25.58333°N, -14.63333°W) by SMU U-152 . Her crew survived.
 * SS Martha (1905) (🇧🇪 Belgium): World War I: The coaster was torpedoed and sunk in the English Channel 5 nmi west by south of Portland Bill, Dorset, United Kingdom (50.5°N, -2.6°W) by SMU UB-80.
 * Saint Georges (🇫🇷 France): World War I: The sailing vessel was shelled and sunk in the Atlantic Ocean 2 nmi north of Trevose Head (50.58333°N, -5.05°W) by SMU U-55.
 *  Saint Joseph (🇫🇷 France): World War I: The three-masted barquentine was shelled and sunk in the Atlantic Ocean 5 nmi north west of Trevose Head (50.6°N, -5.13333°W) by SMU U-55.
 * SS Tarbetness (1904) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Irish Sea 12 nmi south west of the Caernarvon Lightship ( undefined) by SMU U-110 . Her crew survived.
 * RFA Vitol : World War I: The tanker was sunk in the Irish Sea (52.63333°N, -5.06667°W) by SMU U-110 with the loss of four crew.

8 March

 * SS Ayr (1894) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 31 nmi north of Linosa, Italy (36.38333°N, 13.75°W) by SMU UC-27 . Her crew survived.
 * SS Corsham (1918) ( undefined): World War I: The cargo ship was torpedoed and sunk in the North Sea 6 nmi east south east of the mouth of the River Tees by SMU UC-40 with the loss of nine of her crew.
 *  Erica ( undefined): World War I: The schooner was shelled and sunk in the Irish Sea 5 nmi south west of Bardsey Island, Pembrokeshire by SMU U-110 . Her crew survived.
 * SS Intent (1911) ( undefined): World War I: The collier was torpedoed and sunk in the North Sea 4 nmi east by north of Seaham, County Durham by SMU UC-40 with the loss of a crew member.
 * SS Madeline (1894) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 14 nmi east north east of the Pendeen Lighthouse, Cornwall (50.03333°N, -5.41667°W) by SMU U-55 with the loss of three crew.
 * SS Uganda (1905) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 32 nmi north east by north of Linosa, Italy (36.3°N, 13.25°W) by SM U-28  with the loss of a cew member.

9 March

 * SS Grane (1899) (🇳🇴 Norway): World War I: The cargo ship was sunk in the English Channel 4 nmi west south west of Portland Bill, Dorset, United Kingdom by SMU UB-80 with the loss of two of her crew.
 *  Hindenburg ( undefined): World War I: The icebreaker struck a mine and sank in the Baltic Sea off Åland, Sweden with the loss of three of her crew.
 *  Jolanda ( undefined): World War I: The brigantine was scuttled in the Mediterranean Sea north east of Sardinia (41.41667°N, 9.66667°W) by SMU UC-67 . Her crew survived.
 * Marguerite ( undefined): World War I: The fishing smack was scuttled in the Irish Sea off Barrow-in-Furness, Lancashire by SMU UC-75.
 *  Nanny Wignall ( undefined): World War I: The schooner was shelled and sunk in the Atlantic Ocean 14 nmi south east by south of the Tuskar Rock, Ireland by SMU U-110 . Her crew survived.
 *  Pasqualina ( undefined): World War I: The schooner was scuttled in the Mediterranean Sea north east of Sardinia by SMU UC-67.
 * SS Randelsborg (1907) (🇩🇰 Denmark): World War I: The cargo ship was sunk in the Skagerrak 20 nmi south east of Oscö by SMU UB-34 . Her crew survived.
 * SS Silverdale (1906) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 28 nmi east by north of the Cani Rocks, Tunisia by SMU U-35 (Germany) . Her crew survived.
 * SS Udala Mendi (🇪🇸 Spain): The cargo ship collided with a British merchant vessel and sank. Her crew were rescued.

10 March

 * SS Chagres (1912) ( undefined): World War I: The passenger ship] was torpedoed and sunk in the Mediterranean Sea 62 nmi east north east of Cape Drepano, Crete, Greece by SMU UC-74 with the loss of one life.
 * HMT Columba : World War I: The naval trawler struck a mine and sank in the Firth of Forth 2 nmi off the Isle of May, Fife (56.16667°N, -2.56667°W) with the loss of five of her crew.
 * SS Cristina (1903) (🇪🇸 Spain): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 15 nmi south west of Trevose Head, Cornwall, United Kingdom (50.38333°N, -5.21667°W) by SMU U-55 . Her crew survived.
 * HMT Endeavour : World War I: The naval trawler was lost due to enemy action.
 * SS Germaine (1909) (🇫🇷 France): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 2 nmi off Pentire Head, Cornwall (50.61667°N, -4.96667°W) by SMU U-110.
 * SS Prince Charles de Belgique (🇧🇪 Belgium): The cargo ship collided with SS Firtree ( undefined) in the English Channel, 3 to 4 nmi east of Bull Point 51.33333°N, -4.1°W and sank. Her ten crew were rescued.
 * SS Skrymer (1913) (🇳🇴 Norway): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 2 nmi off Pendeen, Cornwall (50.18333°N, -5.66667°W) by SMU UC-77 with the loss of two of her crew.
 * Sunrise ( undefined): World War I: The fishing smack was scuttled in the Irish Sea 10 nmi south east of Maughold Head, Isle of Man by SMU UC-75 . Her crew survived.
 * SMU UB-58 : World War I: The Type UB III submarine struck a mine and sank in the English Channel (51°N, 1.31667°W) with the loss of all 35 crew.
 * Wave ( undefined): World War I: The fishing smack was scuttled in the Irish Sea 10 nmi south west by west of St Bees Head, Cumberland by SMU UC-75 . Her crew survived.

11 March

 * HMT Frigate Bird : The naval trawler was lost on this date.
 * SS Stolt Nielsen (1917) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 38 nmi south of Dellimara Point, Malta (35.16667°N, 14.66667°W) by SMU U-28 (Austria-Hungary) . Her crew survived.
 *  Tripoli ( undefined): World War I: The barque was scuttled in the Mediterranean Sea off Toulon, Var, France by SMU UC-67.
 * SMU UB-17 : World War I: The Type UB I submarine departed Zeebrugge, West Flanders, Belgium on patrol. No further trace, lost with all eighteen crew.
 * W. A. Massey ( undefined): World War I: The trawler struck a mine and sank in the Atlantic Ocean 4 nmi west by north of Handa Island, Sutherland with the loss of ten of her crew.

12 March

 * HMS D3 : World War I: The D-class submarine was bombed and sunk in the English Channel by the French airship FRENCH AIRSHIP AT-0 with the loss of all 25 crew.
 * SS Gaupen ( undefined): World War I: The cargo ship struck a mine and sank in the English Channel 5 nmi south east by east of North Foreland, Kent.
 * SS Nordkyn (1895) (🇳🇴 Norway): World War I: The cargo ship was sunk in the Atlantic Ocean (34.2°N, -10.28333°W) by SMU U-154 . Her crew survived.
 * SS Oswin (1890) (🇸🇪 Sweden): World War I: The cargo ship was sunk in the North Sea 40 nmi east north east of St Abb's Head, Berwickshire, United Kingdom by SMU UB-62 . Her crew survived.

13 March

 * SMS A56 : World War I: The A56-class torpedo boat struck a mine and sank in the North Sea with the loss of sixteen of her crew.
 * SS Adine (🇳🇴 Norway): World War I: The cargo ship was torpedoed and sunk in the North Sea 8 nmi off the Heugh Battery, Hartlepool, County Durham, United Kingdom (54.7°N, 0.96667°W) by SMU UB-34 . Her crew survived.
 * HMT Adrian : The naval trawler was lost on this date.
 * A. E. Whyland (🇺🇸 United States): World War I: The whaler was sunk in the Atlantic Ocean 55 nmi off Tenerife, Canary Islands, Spain (27.03333°N, -16.43333°W) by SMU U-152 . Her crew survived.
 * SS Arno Mendi (1897) (🇪🇸 Spain): World War I: The cargo ship was torpedoed and sunk in the Irish Sea 14 nmi south of the Stack Lighthouse by SMU UC-75.
 * SS Crayford (1911) ( undefined): World War I: The cargo ship was torpedoed and sunk in the North Sea 110 nmi west by south of Skudesnes, Rogaland, Norway by SMU U-46  with the loss of a crew member.
 * SS Lisette ( undefined): World War I: The cargo ship was torpedoed and sunk in the North Sea 8 nmi north east by north of the Shipwash Lightship ( undefined) by a Kaiserliche Marine submarine with the loss of a crew member.
 * SS Londonier (1911) (🇧🇪 Belgium): World War I: The cargo ship was torpedoed and sunk in the English Channel south of the Isle of Wight, United Kingdom (50.51667°N, -1.31667°W) by SMU UC-71.
 * HMT Nexus : The naval trawler was lost on this date.
 * San Francesco di Paola ( undefined): World War I: The sailing vessel was sunk in the Tyrrhenian Sea 70 nmi south of Naples (39.75°N, 12.63333°W) by SMU UB-49.
 * SS Tweed (1892) ( undefined): World War I: The collier was torpedoed and sunk in the English Channel 10 nmi south by west of St. Catherine's Point, Isle of Wight by SMU UB-59 with the loss of seven of her crew.
 * SS Wegadesk (🇳🇴 Norway): World War I: The cargo ship was scuttled in the Atlantic Ocean west of Gibraltar by SMU U-155 . Her crew survived.

14 March

 * SS A. A. Raven (1912) (🇺🇸 United States): World War I: The cargo ship was sunk in the Atlantic Ocean 15 nmi south of the Wolf Rock, Cornwall, United Kingdom (49.68333°N, -5.83333°W) by SMU UB-55 with the loss of seven crew.
 * HMT Agate (1913) : World War I: The naval trawler struck a mine and sank in the English Channel off the Royal Sovereign Lightship ( undefined) with the loss of four of her crew. by SMU UC-71 . Her crew survived.
 * SS Amulet ( undefined): The cargo ship collided with a Norwegian merchant vessel and sank. Her crew were rescued.
 * HMS Ardandearg (1895) : World War I: The collier was torpedoed and sunk in the Mediterranean Sea 86 nmi east of Malta by SMU UC-54 with the loss of two of her crew.
 * SS Arpillao (1892) (🇪🇸 Spain): World War I: The cargo ship was sunk in the Atlantic Ocean off Las Palmas, Canary Islands (29.13333°N, -14.88333°W) by SMU U-157 . Her crew survived.
 *  Carla (🇳🇴 Norway): World War I: The barque was shelled and sunk in the English Channel 56 nmi north west by north of Le Havre, Seine-Maritime, France by SMU UB-33 . Her crew survived.
 * SS Castleford (1897) ( undefined): World War I: The cargo ship was torpedoed and sunk in the North Sea 2 nmi east by north of Robin Hood's Bay, Yorkshire by SMU UC-40 . Her crew survived.
 *  Jeanne (🇫🇷 France): World War I: The schooner was scuttled in the Gulf of Lion (42.53333°N, 4.16667°W) by SMU UC-67.
 * SS Jeanne Marie (1912) (🇫🇷 France): World War I: The cargo ship struck a mine and sank in the English Channel off Sark, Channel Islands (49.33333°N, -2.36667°W).
 * SS Principessa Laetitia (1903) ( undefined): World War I: The cargo ship was sunk in the Tyrrhenian Sea off Ponza by SMU UB-49 . Her crew survived.
 * SS Tweed (1907) ( undefined): World War I: The cargo ship was torpedoed and sunk in St. George's Channel 15 nmi south south east of the Tuskar Rock, Ireland (52.18333°N, -5.83333°W) by SMU UC-75 . Her crew survived.
 * SS Venezuela (1907) (🇫🇷 France): World War I: The coaster was sunk in the English Channel off the Isle of Wight, United Kingdom by SMU UB-59 with the loss of all hands.

15 March

 * SS Adriatico ( undefined): The cargo ship collided with a British merchant vessel and sank.
 *  Alessandra ( undefined): World War I: The full-rigged ship was scuttled in the Atlantic Ocean west of Madeira, Portugal (33.35°N, -21°W) by SMU U-153.
 * SS Amazon (1906) ( undefined): World War I: The ocean liner was torpedoed and sunk in the Atlantic Ocean off Malin Head, County Donegal (55.81667°N, -8.1°W) by SMU U-110 . Her crew survived.
 * SS Armonia (1891) (🇨🇦 Canada): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 38 nmi off Porquerolles, Var, France by SMU UC-67 with the loss of seven of her crew.
 *  Carrie A. Lane (🇺🇸 United States): The schooner foundered in the Gulf of Guinea off Assinie, French West Africa.
 * SS Clan Macdougal (1904) ( undefined): World War I: The cargo ship was sunk in the Mediterranean Sea 60 nmi south of Cape Carbonara, Sardinia, Italy by SMU UB-49 with the loss of 33 crew.
 * Severn ( undefined): The coaster collided with the Widnes-Runcorn Transporter Bridge and sank in the River Mersey with the loss of all three crew.
 * Sparkling Foam ( undefined): World War I: The three-masted sailing vessel was scuttled in the English Channel 9 nmi south east of Beer Head, Devon by SMU UB-33 . Her crew survived.
 * SMU U-110 : World War I: The Type U 93 submarine was depth charged and sunk in the Atlantic Ocean off Malin Head (54.81667°N, -8.1°W) by HMS Michael (1915) and HMS Moresby (1915) (both ) with the loss of all 39 crew.
 * SMU UB-106 : The Type UB III submarine sank at Kiel, Schleswig-Holstein (54.7°N, 10.15°W) with the loss of all 35 crew. She was raised on 18 March, repaired and returned to service.

16 March

 * SS Ellaston (1890) ( undefined): World War I: The collier was scuttled in the Atlantic Ocean 180 nmi off the Canary Islands, Spain by SMU U-152 . Her crew survived, but her captain was taken as a prisoner of war.
 * SS Lightfoot (1916) ( undefined): World War I: The cargo ship was torpedoed and sunk in the English Channel 2 nmi south of the Owers Lightship ( undefined) by SMU UB-30 . Her crew survived.
 * SS Oilfield (1896) ( undefined): World War I: The tanker was torpedoed and damaged in the Atlantic Ocean off Cape Wrath, Sutherland (58.75°N, -5.43333°W) by SMU U-90 . She was beached at Stornoway, Orkney Islands but was declared a constructive total loss.
 *  Quintero (🇩🇰 Denmark): World War I: The three-masted barque was scuttled in the North Sea off Skagen (57.9°N, 9.55°W) by SMU UB-34 . Her crew survived.
 * HMT Vulture II : The naval trawler collided with another vessel and sank off Eriboll, Sutherland.

17 March

 * Anne Yvonne (🇫🇷 France): World War I: The sailing vessel was shelled and sunk in the English Channel 1.5 nmi off Cadgwith, Cornwall, United Kingdom (49.98333°N, -5.16667°W) by SMU UB-57.
 * Arvor (🇫🇷 France): World War I: The sailing vessel was sunk in the English Channel 1.5 nmi north east of The Lizard, Cornwall (49.98333°N, -5.16667°W) by SMU UB-57.
 * Beata (🇫🇷 France): World War I: The sailing vessel was shelled and sunk in the English Channel 1.5 nmi north east of The Lizard (49.98333°N, -5.16667°W) by SMU UB-57.
 * SY Cressida ( undefined): World War I: The steam yacht was torpedoed and sunk in the Irish Sea 16 nmi west by north of The Skerries, Isle of Anglesey (53.38333°N, -5.08333°W by SMU U-103 with the loss of three crew.
 *  Dunure ( undefined): The barque sprang a leak and foundered in the Mediterranean Sea 12 nmi south of Isla Cristina, Spain. Her crew were rescued.
 * Eliza Anne ( undefined): World War I: The ketch was scuttled in the Atlantic Ocean 33 nmi south by west of the Eddystone Lighthouse by SMU UC-75 . Her crew survived.
 * SS Guadalquivir (1897) (🇪🇸 Spain): World War I: The cargo ship was sunk in the Atlantic Ocean (33.16667°N, -9.61667°W) by SMU U-154 . Her crew survived.
 * SS Ivydene (1901) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 36 nmi north of Cape Bougaroni, Algeria (38.81667°N, 6.53333°W by SMU UB-52 with the loss of a crew member.
 * SS Sea Gull (1899) ( undefined): World War I: The coaster was torpedoed and sunk in the Irish Sea 7 nmi off Point Lynas, Anglesey by SMU U-103 with the loss of twenty crew.
 * SS South Western (1874) ( undefined): World War I: The coaster was torpedoed and sunk in the English Channel 9 nmi west by south of St. Catherine's Point, Isle of Wight by SMU UB-59 with the loss of 24 of her crew.
 * SS Tripoli (1912) ( undefined): World War I: The passenger ship was sunk in the Mediterranean Sea off Capo Figari, Sardinia (41.11667°N, 9.95°W) by SMU UB-49.
 * SS Waihemo (1904) ( undefined): World War I: The cargo ship struck a mine and sank in the Aegean Sea off Piraeus. Her crew survived.

18 March

 * SS Atlantic Sun ( undefined): World War I: The tanker was torpedoed and sunk off Orsay, Inner Hebrides (55.81667°N, -7.16667°W) by SM U-46 with the loss of two of her crew.
 * SS Baygitano (1905) ( undefined: World War I: The cargo ship was torpedoed and sunk in the English Channel off Lyme Regis, Dorset (50.68333°N, -2.93333°W) by SMU UC-77 with the loss of two of her crew.
 * SS Heian Maru No.18 (🇯🇵 Japan): The cargo ship caught fire and sank at Nagasaki. She was a total loss.
 * SS John H. Barry (1899) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 104 nmi north north west of Cape Bougaroni, Algeria (38.7°N, 5.75°W) by SMU UB-52 with the loss of three crew.
 * SS Massilia ( undefined): World War I: The coal hulk was torpedoed and sunk at Augusta, Sicily by SMU UC-25.
 * SS Prometeo (1906) ( undefined): World War I: The tanker was sunk in the Atlantic Ocean off Cape Carvoeiro, Portugal (37.9°N, -16°W) by SMU U-155.
 * SS Reidar (1903) (🇳🇴 Norway): World War I: The cargo ship was sunk in the Atlantic Ocean 340 nmi off the coast of Portugal by SMU U-155 with the loss of four of her crew.
 * SS Saldanha (1911) ( undefined): World War I: The cargo ship was torpedoed and damaged in the Mediterranean Sea 95 nmi north of Algiers, Algeria (38.31667°N, 2.65°W) by SMU UB-52 . She was torpedoed again the next day and sank with the loss of six crew.
 * FRENCH TUG Utrecht : World War I: The naval tug was shelled and sunk in the Mediterranean Sea90 nmi east of Capo Figari, Sardinia, Italy (41.06667°N, 11.8°W) by SMU UB-49 with the loss of two of her crew.

19 March

 * SS Burnstone (1903) ( undefined): World War I: The collier was torpedoed and sunk in the North Sea 44 nmi north of the Farne Islands, Northumberland by SMU UB-62 with the loss of five of her crew.
 *  Giovanni Albanesi ( undefined): World War I: The barque was shelled and sunk in the Gulf of Naples (40.41667°N, 13.28333°W) by SMU UB-49.
 * San Francesco di Paolo ( undefined): World War I: The sailing vessel was scuttled in the Gulf of Naples 70 nmi west of Naples (40.66667°N, 13.8°W) by SMU UB-49.
 * SS Luxor (1918) ( undefined): World War I: The cargo ship was torpedoed and sunk in the English Channel 27 nmi west by south of St. Catherine's Point, Isle of Wight by SMU UB-57 . Her crew survived.

20 March

 * SS Antonios M. Theophilatos (1889) (🇬🇷 Greece): World War I: The cargo ship was sunk in the Mediterranean Sea 75 nmi north west of Port Said, Egypt (32.06667°N, 32.13333°W) by SMU U-33 (Germany).
 * SS Azemmour (1909) (🇫🇷 France): World War I: The coaster was torpedoed and sunk in the English Channel south of the Isle of Wight, United Kingdom (50.53333°N, -1.6°W) by SMU UB-59.
 * SS Eros (1905) (🇸🇪 Sweden): World War I: The coaster was torpedoed and sunk in the Atlantic Ocean 8 nmi west of The Lizard, Cornwall, United Kingdom (49.93333°N, -5.41667°W) by SMU UB-103 with the loss of three of her crew.
 * SS Glenford (1893) ( undefined): World War I: The coaster was shelled and sunk in the Irish Sea 24 nmi east of Rockabill, County Dublin (53.66667°N, -5.33333°W) by SMU U-101 . Her crew survived.
 * SS Kassanga (1899) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Irish Sea 23 nmi south east by south of the South Arklow Lightship ( undefined) (52.45°N, -5.43333°W) by SMU U-103 . Her crew survived.
 * SS Matteo Renato Imbriani (1911) ( undefined): World War I: The cargo ship struck a mine and sank in the Mediterranean Sea 6 nmi south west of the Île du Planier, Bouches-du-Rhône, France by SMU UC-67.
 * SS Saint Dimitrios (1901) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 50 nmi north by east of Port Said by SMU U-33 (Germany) . Her crew survived.
 * SS Samoset (1909) ( undefined): World War I: The tanker was torpedoed and sunk in the Mediterranean Sea 50 nmi east north east of Port Said by SMU U-33 (Germany) with the loss of three crew.
 * SS Yochow (1901) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 54 nmi north by east of Port Said by SMU U-33 (Germany) with the loss of 50 crew.

21 March

 * SMS A7 : World War I: The A1-class torpedo boat) was shelled and sunk in the North Sea off Zeebrugge, West Flanders, Belgium by HMS Morris (1914) and/or FRENCH DESTROYER Bouclier and FRENCH DESTROYER Capitaine Mehl (both ) with the loss of 23 of her crew.
 * SMS A10 : World War I: The destroyer was rammed and sunk in the North Sea off Zeebrugge by HMS Botha (1914).
 * SS Begonia (1918) ( undefined): World War I: The collier was torpedoed and sunk in the Atlantic Ocean 44 nmi north of Wolf Rock, Cornwall (49.21667°N, -5.66667°W) by SMU UB-55 . Her crew survived.
 * Dante C ( undefined): World War I: The vessel was sunk in the Gulf of Naples by SMU UB-49.
 * SS Ikeda (1917) ( undefined): World War I: The cargo ship was torpedoed and sunk in the English Channel 7 nmi west of the Brighton Lightship ( undefined) by SMU UB-40 . Her crew survived.
 * SS Termini (1906) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Aegean Sea off Milos, Greece (36.81667°N, 24.35°W) by SMU UC-37.
 * SS Tyrhaug (1906) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 10 nmi north east of the Pendeen Lighthouse, Cornwall (50.31667°N, -5.6°W) by SMU UB-103 with the loss of two of her crew.

22 March

 * HMS Gaillardia (1917) : World War I: The Aubretia-class sloop struck a mine and sank in the North Sea.
 * HMT J. C. P. : The naval trawler was lost on this date.
 * SS Polleon (1915) ( undefined): World War I: The cargo ship was torpedoed and sunk in the North Sea 3 nmi east north east of the mouth of the River Tyne by SMU UB-78 with the loss of four of her crew.
 * SS Saint Jean II (1908) (🇫🇷 France): World War I: The cargo ship was sunk in the Mediterranean Sea 61 nmi north west of Cape Bon, Algeria (37.93333°N, 10.81667°W) by SMU UB-50 . Her crew survived.
 * San Giuseppe C. ( undefined): World War I: The sailing vessel was sunk in the Mediterranean Sea south of Sardinia by SMU UC-67.
 * SS Trinidad (1884) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Irish Sea 12 nmi east of the Codling Bank Lightship ( undefined) by SMU U-101 with the loss of 39 crew.

23 March

 * HMS Arno (1915) : The destroyer collided with HMS Hope (1910) in the Dardanelles (40.24167°N, 26.50833°W) and sank.
 * SS Aulton (1899) ( undefined): World War I: The coaster was torpedoed and sunk in the North Sea 9 nmi south east by east of Berwick-upon-Tweed, Northumberland by SMU UB-83 with the loss of two of her crew.
 * SS Chattahoochee (1911) (🇺🇸 United States): World War I: The cargo ship was torpedoed and sunk in the English Channel 28 nmi south of Penzance, Cornwall, United Kingdom (49.65°N, -5.38333°W) by SMU UB-55 . Her crew survived.
 * SS Etonian (1898) ( undefined): World War I: The passenger ship was torpedoed and sunk in the Atlantic Ocean 34 nmi south by east of the Old Head of Kinsale, County Cork by SMU U-61 with the loss of seven crew.
 *  Jane Grey ( undefined): World War I: The schooner was shelled and sunk in the Irish Sea 14 nmi north west by west of the Smalls Lighthouse by SMU U-101 . Her crew survived.
 * SS Madame Midas (1909) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 38 nmi west south west of The Lizard, Cornwall (49.45°N, -5.46667°W) by SMU UB-55 . Her crew survived.
 * SS Mar Baltico (1899) (🇪🇸 Spain): World War I: The cargo ship was sunk in the English Channel (49.28333°N, -5.08333°W) by SMU UB-55.
 * HMT New Dawn : World War I: The naval trawler struck a mine and sank in the English Channel off The Needles, Isle of Wight with the loss of three of her crew.
 * SS Venborg (🇳🇴 Norway): World War I: The cargo ship was sunk in the Atlantic Ocean 25 nmi north of Ouessant, Finistère, France (48.91667°N, -5.03333°W) by SMU UB-55 . Her crew survived.

24 March

 * SS Anteros (1917) ( undefined): World War I: The cargo ship ws torpedoed and sunk in the Irish Sea 16 nmi west by north of South Stack (53.28333°N, -5.15°W) by SMU UB-103 with the loss of two of her crew.
 * SS Avala (1890) ( undefined): World War I: The cargo ship was shelled and sunk in the Atlantic Ocean 320 nmi west of Madeira, Portugal (38.53333°N, -17.96667°W) by SMU U-155.
 * Fileur (🇫🇷 France): World War I: The sailing vessel was sunk in the Atlantic Ocean 40 nmi north west of the Île de Batz, Finistère by SMU UB-55.
 *  John G. Walter ( undefined): World War I: The schooner was shelled and sunk in the Irish Sea 20 nmi south west of the Smalls Lighthouse by SMU U-101 . Her crew survived.
 *  Jorgina ( undefined): World War I: The schooner was shelled and sunk in the Atlantic Ocean 360 nmi north by west of Madeira (38.66667°N, -18.23333°W) by SMU U-155 . Her crew survived.
 * La Nuova Felice ( undefined): World War I: The sailing vessel was sunk in the Strait of Sicily by SMU UC-53.
 * Nuova Enio ( undefined): World War I: The sailing vessel was sunk in the Strait of Sicily by SMU UC-53.
 * ITALIAN MINELAYER Partenope : World War I: The minelayer was sunk in the Mediterranean Sea off Bizerta, Algeria (37.88333°N, 10.16667°W) by SMU UC-67 . Her crew survived.
 * Regina Immacolata ( undefined): World War I: The sailing vessel was sunk in the Strait of Sicily by SMU UC-53.
 * Tre Sorrelle Salvo ( undefined): World War I: The sailing vessel was sunk in the Strait of Sicily by SMU UC-53.
 * SS War Knight ( undefined): World War I: The cargo ship collided with SS O. B. Jennings (flag unknown) in the English Channel off the Needles Lighthouse, Isle of Wight. She then strcuk a mine and was damaged. War Knight was beached at Freshwater, Isle of Wight.

25 March

 * HMT Border Lads : World War I: The naval trawler was torpedoed and sunk in the North Sea 2 nmi off the mouth of the River Tyne by SMU UB-78 with the loss of four of her crew.
 * Carlo Splendor ( undefined): World War I: The sailing vessel was sunk in the Strait of Messina by SMU UB-49.
 * SS Destro (1914) ( undefined): World War I: The coaster was torpedoed and sunk in the Irish Sea 5 nmi south west of the Mull of Galloway, Wigtownshire (54.56667°N, -4.75°W) by SMU U-96 with the loss of six of her crew.
 * Francesco Antonio Aiello ( undefined): World War I: The sailing vessel was sunk in the Strait of Sicily by SMU UC-67.
 * SS Hercules (1881) ( undefined): World War I: The cargo ship was torpedoed and sunk in the North Sea 4 nmi north north west of Flamborough Head, Yorkshire by SMU UB-21 with the loss of a crew member.
 * L'Iniziatore ( undefined): World War I: The sailing vessel was sunk in the Strait of Sicily (37.5°N, -11.75°W) by SMU UC-67.
 *  Rio Ave (🇵🇹 Portugal): World War I: The schooner was shelled and sunk in the Atlantic Ocean 100 nmi off Madeira (38.55°N, -18.13333°W) by SMU U-155.

26 March

 * Elisabetha ( undefined): World War I: The sailing vessel was sunk in the Strait of Sicily by SMU UC-67.
 * RFA Lady Cory-Wright : World War I: The mine carrier was torpedoed and sunk in the English Channel 14 nmi off The Lizard, Cornwall by SMU UC-17 with the loss of 39 of her 40 crew.
 * SMU U-61 : World War I: The Type Mittel U submarine was sunk in the Atlantic Ocean by USS PC-51 ( with the loss of all 36 crew.
 * SS Volturno (1916) ( undefined): World War I: The bulk carrier was sunk in the Mediterranean Sea off Bône, Algeria (37.45°N, 8.11667°W) by SMU UB-50.

27 March

 * SS Allendale (1917) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 52 nmi south by west of The Lizard, Cornwall (49.83333°N, -5.83333°W) by SMU U-101 ( with the loss of a crew member.
 * Beira (🇵🇹 Portugal): World War I: The sailing vessel was sunk in the Atlantic Ocean (34.16667°N, -14.58333°W) by SMU U-154 . Her crew survived.
 * Carlo P. ( undefined): World War I: The sailing vessel was sunk in the Mediterranean Sea 30 nmi north of the Galite Islands, Tunisia by SMU UC-54.
 * Castrenzo Coppola ( undefined): World War I: The sailing vessel was sunk in the Tyrrhenian Sea off Naples by SMU UC-53.
 * HMS Kale (1904) : World War I: The E-class destroyer struck a naval mine and sank in the North Sea.
 *  Watauga ( undefined): World War I: The schooner was shelled and sunk in the Atlantic Ocean 450 nmi west by north of Lisbon, Portugal (38.9°N, -18.4°W) by SMU U-155 with the loss of five crew.

28 March

 * Botha ( undefined): World War I: The trawler was scuttled in the North Sea 3 nmi east of Whitby, Yorkshire by SMU UC-64.
 * Brotherly Love ( undefined): World War I: The trawler was shelled and sunk in the North Sea 6 nmi east north east of Whitby by SMU UC-64.
 * City of Winchester ( undefined): Word War I: The ketch was shelled and sunk in the English Channel 10 nmi north west by west of the Les Hanois Lighthouse, Guernsey, Channel Islands (49.46667°N, -2.91667°W) by SMU U-90 . Her crew survived.
 * SS Grampus ( undefined): The dredger foundered on this date.
 * Honora ( undefined): World War I: The fishing vessel was shelled and sunk in the North Sea 6 nmi east north east of Whitby by SMU UC-64.
 * SS Inkosi (1902) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Irish Sea 10 nmi south west of Burrow Head, Wigtownshire by SMU U-96 with the loss of three crew.
 * Noel ( undefined): World War I: The fishing vessel was shelled and sunk in the North Sea 6 nmi east north east of Whitby by SMU UC-64.
 * HMS Tithonus : World War I: The armed boarding steamer was sunk in the North Sea 50 nmi east of Aberdeen (57.06667°N, -0.55°W) by SMU UB-72 with the loss of four of her crew.

29 March

 * SS Porto Santo (1895) (🇵🇹 Portugal: The cargo ship foundered in the Aegean Sea off Antimilos, Greece, possibly after striking a mine. Her crew survived.
 * HMT Swallow : The naval trawler was lost on this date.
 * SS T. R. Thompson (1897) ( undefined): World War I: The cargo ship was torpedoed and sunk in the English Channel 7 nmi south of Newhaven, East Sussex by SMU UB-57 with the loss of 33 of her crew.

30 March

 * SMS G87 : World War I: The V25-class destroyer struck a mine and sank in the North Sea with the loss of 43 of her crew.
 * SMS G93 : World War I: The V25-class destroyer struck a mine and sank in the North Sea with the loss of ten of her crew.
 * Geraldine ( undefined: World War I: The fishing smack was shelled and sunk in the Irish Sea 10 nmi east of Lambay Island, County Dublin by SMU U-96 with the loss of all five of her crew.
 * SS Lough Fisher (1887) ( undefined): World War I: The coaster was sunk in the Atlantic Ocean 12 nmi south south east of Helvick Head, County Waterford by SMU U-101 with the loss of thirteen crew.
 * SS Salaminia (1897) (🇬🇷 Greece): World War I: The cargo ship was shelled and sunk in the Irish Sea 13 nmi south south east of Rockabill (53.45°N, -5.53333°W) by SMU UB-64 . There were a number of casualties.
 * SS Stabil (🇳🇴 Norway): World War I: The coaster was torpedoed and sunk in the Atlantic Ocean off the Pendeen Lighthouse, Cornwall, United Kingdom (50.31667°N, -5.6°W) by SMU U-46 with the loss of nine crew.
 * St. Michan ( undefined): World War I: The fishing vessel was shelled and sunk in the Irish Sea 10 nmi east of Lambay Island by SMU U-96 . Her crew survived.
 * SS Vafos (🇳🇴 Norway): World War I: The cargo ship was sunk in the North Sea 35 nmi south west by west of the Marstenen Lighthouse by SMU UB-72 with the loss of four of her crew.

31 March

 * RMS Celtic (1901) ( undefined): World War I: The ocean liner was torpedoed and damaged in the Irish Sea 11 nmi south of the Isle of Man by SMU UB-77 with the loss of six lives. She was beached but was later refloated, repaired and returned to service.
 * SS Conargo (1902) ( undefined): World War I: The cargo ship was torpedoed and damaged in the Irish Sea 12 nmi) west by north of the Calf of Man, Isle of Man (54.03333°N, -5.18333°W) by SMU U-96 . She was torpedoed again the next day and sunk with the loss of nine of her crew (53.55°N, -4.83333°W).
 * SS Excellence Pleske (1884) ( undefined): World War I: The cargo ship was torpedoed and sunk in the English Channel 2.5 nmi south south east of Dungeness, Kent by SMU UB-57 with the loss of thirteen of her crew.
 * Immacolata ( undefined): World War I: The sailing vessel was sunk in the Tyrrhenian Sea off Bari Sardo, Sardinia by SMU UC-35.
 * SS Indien (1902) (🇩🇰 Denmark): World War I: The cargo ship was sunk in the Atlantic Ocean (40.66667°N, -28.25°W) by SMU U-152 with the loss of 29 crew.
 * SS La Loire (1902) (🇫🇷 France): World War I: The cargo ship was sunk in the Mediterranean Sea north east of Alexandria, Egypt by SMU U-33 (Germany).
 * San Nicola ( undefined): World War I: The sailing vessel was shelled and sunk in the Mediterranean Sea 18 nmi east north east of Valletta, Malta by SMU UC-52.
 * TSS Slieve Bloom ( undefined: The ferry collided with another vessel and sank with the loss of one life.
 * SS Vianna (1899) ( undefined): World War I: The coaster was torpedoed and sunk in the North Sea 4 nmi east of Seaham Harbour, County Durham (54.83333°N, -1.2°W) by SMU UC-64 with the loss of four of her crew.

Unknown date

 * Angelo Raffaele ( undefined): World War I: The vessel was sunk in the Gulf of Naples between 19 and 21 March by SMU UB-49.
 *  Avé Maria (🇫🇷 France): The schooner sprang a leak and foundered in early March. Her crew were rescued.
 * Cecil L. Shave ( undefined): World War I: The sailing vessel was sunk in the Atlantic Ocean off the Azores, Portugal by a Kaiserliche Marine submarine.
 * USS Cyclops (AC-4) : The Proteus-class collier foundered in the Bermuda Triangle some time after 4 March with the loss of all 306 passengers and crew.
 *  Lottie A. Silver ( undefined): The schooner foundered in the Atlantic Ocean in early March.