List of shipwrecks in April 1917

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

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

1 April

Aztec ( United States): World War I: The cargo ship was sunk in the Atlantic Ocean off Ouessant, Finistère, France (48°20′N 6°00′W / 48.333°N 6.000°W / 48.333; -6.000) by SM U-46 ( Kaiserliche Marine) with the loss of 28 crew.^[1]
Bergenhus ( Denmark): World War I: The passenger ship was sunk in the North Sea 130 nautical miles (240 km) east of the Farne Islands, Northumberland, United Kingdom by SM UC-40 ( Kaiserliche Marine).There were no casualties.^[2]
Camilla ( Norway): World War I: The cargo ship was sunk in the North Sea 150 nautical miles (280 km) west of Skudesnes, Rogaland (56°32′N 3°59′E / 56.533°N 3.983°E / 56.533; 3.983) by SM UB-35 ( Kaiserliche Marine) with the loss of eight of her crew.^[3]
Consul Persson ( Norway): World War I: The cargo ship was sunk in the North Sea (58°21′N 2°55′E / 58.350°N 2.917°E / 58.350; 2.917) by SM U-54 ( Kaiserliche Marine). Her crew survived.^[4]
Eastern Belle ( United Kingdom): World War I: The ketch was scuttled in the English Channel 30 nautical miles (56 km) south west of St. Catherine's Point, Isle of Wight by SM UC-72 ( Kaiserliche Marine). Her crew survived.^[5]
Endymion ( United Kingdom): World War I: The ketch was shelled and sunk in the English Channel off Start Point, Devon by SM UB-32 ( Kaiserliche Marine) with the loss of four crew.^[6]
Ester ( Denmark): World War I: The cargo ship was sunk in the North Sea (56°32′N 4°18′E / 56.533°N 4.300°E / 56.533; 4.300) by SM UB-35 ( Kaiserliche Marine). Her crew survived.^[7]
Fjelland ( Norway): World War I: The coaster was sunk in the North Sea 50 nautical miles (93 km) south west by west of Utsire, Rogaland (58°20′N 5°50′E / 58.333°N 5.833°E / 58.333; 5.833) by SM U-54 ( Kaiserliche Marine) with the loss of a crew member.^[8]
Jolie Brise ( France): World War I: The fishing vessel was sunk in the Atlantic Ocean 20 nautical miles (37 km) off Audierne, Finistère by SM UB-36 ( Kaiserliche Marine).^[9]
Kasenga ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 2 nautical miles (3.7 km) off Cape Palos, Spain by an enemy submarine.^[10]
Maria Santissima D. Grazie ( Italy): World War I: The sailing vessel was sunk in the Mediterranean Sea off Sicily by SM U-65 ( Kaiserliche Marine).^[11]
Maria T. ( Italy: World War I: The sailing vessel was sunk in the Mediterranean Sea off Sicily by SM U-65 ( Kaiserliche Marine).^[12]
Providence de Dieu ( France): World War I: The fishing vessel was sunk in the Atlantic Ocean 20 nautical miles (37 km) off Audierne by SM UB-36 ( Kaiserliche Marine).^[13]
Silvia ( United Kingdom): World War I: The schooner was scuttled in the English Channel 15 nautical miles (28 km) south south east of the Owers Lightship ( United Kingdom) (50°19′N 0°28′W / 50.317°N 0.467°W / 50.317; -0.467) by SM UB-39 ( Kaiserliche Marine). Her crew survived.^[14]
Warren ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Tyrrhenian Sea 20 nautical miles (37 km) south west of Civitavecchia, Lazio, Italy (41°51′N 11°22′E / 41.850°N 11.367°E / 41.850; 11.367) by SM UC-38 ( Kaiserliche Marine) with the loss of three of her crew. Her captain was taken as a prisoner of war.^[10]^[15]
Zambesi ( United Kingdom): World War I: The collier was torpedoed and sunk in the Mediterranean Sea 15 nautical miles (28 km) north by west of Alexandria, Egypt (31°26′N 29°49′E / 31.433°N 29.817°E / 31.433; 29.817) by SM U-63 ( Kaiserliche Marine) with the loss of three crew.^[10]^[16]^[17]

2 April

Britannia ( United Kingdom): World War I: The cargo ship torpedoed and was sunk in the Mediterranean Sea 22 nautical miles (41 km) west north west of Pantelleria, Italy (36°35′N 11°28′E / 36.583°N 11.467°E / 36.583; 11.467) by SM U-65 ( Kaiserliche Marine). Her crew survived, but two of them were taken as prisoners of war.^[10]^[18]
HMT Commandant ( Royal Navy): World War I: The naval trawler struck a mine and sank in the North Sea off the Sunk Lightship ( United Kingdom) (51°33′N 1°36′E / 51.550°N 1.600°E / 51.550; 1.600) with the loss of five of her crew.^[19]
Filicudi ( Regia Marina): World War I: The naval tug struck a mine and sank in the Mediterranean Sea off Trapani, Sicily.^[20]
Havlyst ( Norway): World War I: The coaster was sunk in the North Sea off Lindesnes, Vest-Agder (57°30′N 6°50′E / 57.500°N 6.833°E / 57.500; 6.833) by SM U-54 ( Kaiserliche Marine). Her crew survived.^[21]
Lord Scarborough ( United Kingdom): World War I: The trawler was sunk in the North Sea 100 nautical miles (190 km) east of the Isle of May, Fife by SM UB-35 ( Kaiserliche Marine). Her crew survived.^[22]
Saggita ( Norway): World War I: The barque was sunk in the North Sea (60°00′N 2°00′W / 60.000°N 2.000°W / 60.000; -2.000) by SM U-78 ( Kaiserliche Marine). Her crew survived.^[23]
Snespurven ( Norway): World War I: The barque was shelled and sunk in the Atlantic Ocean 25 nautical miles (46 km) south south west of the Tuskar Rock, Ireland (50°55′N 7°03′W / 50.917°N 7.050°W / 50.917; -7.050) by SM U-59 ( Kaiserliche Marine). Her crew survived.^[24]
Zealandia ( United States) The ship ran aground off Southport, Lancashire, United Kingdom.^[25]

3 April

Annunziata A. ( Italy): World War I: The brigantine was scuttled in the Mediterranean Sea east of Sardinia (39°52′N 10°04′E / 39.867°N 10.067°E / 39.867; 10.067) by SM UC-38 ( Kaiserliche Marine).^[26]
Ardgask ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 15 nautical miles (28 km) south west of Cape Rosello, Sicily by SM U-35 ( Kaiserliche Marine) with the loss of a crew member.^[10]^[27]
Caterina R. ( Italy): World War I: The barquentine was scuttled in the Mediterranean Sea east of Sicily (39°27′N 9°46′E / 39.450°N 9.767°E / 39.450; 9.767) by SM UC-38 ( Kaiserliche Marine).^[28]
Domenico ( Italy): World War I: The sailing vessel was scuttled in the Mediterranean Sea east of Sardinia (39°24′N 9°55′E / 39.400°N 9.917°E / 39.400; 9.917) by SM UC-38 ( Kaiserliche Marine).^[29]
Ellen James ( United Kingdom): World War I: The schooner was shelled and sunk in the Atlantic Ocean west of Ouessant, Finistère, France by SM UC-71 ( Kaiserliche Marine) with the loss of five of her crew.^[10]^[30]
Ernest Simons ( France): World War I: The passenger ship was sunk in the Mediterranean Sea north east of Cap Sera, Algeria (37°08′N 8°28′E / 37.133°N 8.467°E / 37.133; 8.467) by SM UC-37 ( Kaiserliche Marine). Her crew survived.^[31]
Hesperus ( Russia): World War I: The cargo ship was sunk in the Atlantic Ocean 72 nautical miles (133 km) off the Bishop Rock, Isles of Scilly, United Kingdom (48°50′N 7°20′W / 48.833°N 7.333°W / 48.833; -7.333) by SM U-46 ( Kaiserliche Marine). Her crew survived.^[32]
Maria Ferrara ( Italy): World War I: The sailing vessel was sunk in the Mediterranean Sea west of Sicily by SM U-65 ( Kaiserliche Marine).^[33]
Nuova Maria di Porto Salvo ( Italy): World War I: The sailing vessel was sunk in the Mediterranean Sea east of Sicily by SM UC-38 ( Kaiserliche Marine).^[34]
Saint Simon ( France): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 20 nautical miles (37 km) north west of La Galite, Tunisia (37°36′N 8°38′E / 37.600°N 8.633°E / 37.600; 8.633) by SM UC-37 ( Kaiserliche Marine).^[35]
Vasilefs Constantinos ( Greece): World War I: The cargo ship was sunk in the Aegean Sea 45 nautical miles (83 km) south west of Akra Akritas by SM UB-43 ( Kaiserliche Marine).^[36]

4 April

City of Paris ( United Kingdom): World War I: The passenger ship was torpedoed and sunk in the Mediterranean Sea 46 nautical miles (85 km) south by east of Cap d'Antibes, Alpes-Maritimes, France (42°54′N 7°38′E / 42.900°N 7.633°E / 42.900; 7.633) by SM UC-35 ( Kaiserliche Marine) with the loss of 122 lives.^[10]^[37]
Domingo ( Italy): World War I: The cargo ship was sunk in the Atlantic Ocean off Queenstown, County Cork, United Kingdom by SM U-60 ( Kaiserliche Marine).^[38]
Gibraltar ( United Kingdom): World War I: The trawler was scuttled in the North Sea 20 nautical miles (37 km) east north east of Rattray Head, Aberdeenshire by SM UB-35 ( Kaiserliche Marine). Her crew survived.^[39]^[40]
Hundvaagø ( Norway): World War I: The cargo ship was torpedoed and damaged in the Atlantic Ocean south west of Ireland. She was beached at Castletownbere, County Cork. Subsequently repaired and returned to service.^[41]
Hunstanton ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 36 nautical miles (67 km) west of the Isles of Scilly (49°50′N 7°40′W / 49.833°N 7.667°W / 49.833; -7.667) by SM UC-30 ( Kaiserliche Marine). Her crew survived.^[42]
Maggie Ross ( United Kingdom): World War I: The trawler was shelled and sunk in the North Sea 60 nautical miles (110 km) north east of Girdle Ness, Aberdeenshire by SM UB-35 ( Kaiserliche Marine). Her crew survived.^[40]^[43]
Margit ( United Kingdom): World War I: The collier was torpedoed and sunk in the Mediterranean Sea 80 nautical miles (150 km) south west of Cape Matapan, Greece (35°28′N 21°24′E / 35.467°N 21.400°E / 35.467; 21.400) by SM U-63 ( Kaiserliche Marine). Her crew survived.^[10]^[16]^[44]
Marguerite ( United States): World War I: The four-masted schooner was damaged in the Mediterranean Sea 35 nautical miles (65 km) south west of Sardinia by SM U-35 ( Kaiserliche Marine). She sank the next day; her crew survived.^[45]
Missourian ( United States): World War I: The cargo ship was sunk in the Tyrrhenian Sea off Porto Maurizio, Liguria, Italy by SM U-52 ( Kaiserliche Marine). Her crew survived.^[46]
Monte Protedigo ( Argentina): World War I: The barquentine was sunk in the Atlantic Ocean off the Isles of Scilly (49°27′N 6°44′W / 49.450°N 6.733°W / 49.450; -6.733) by SM UC-30 ( Kaiserliche Marine).^[47]
Parana ( Brazil): World War I: The cargo ship was sunk in the English Channel off Barfleur, Manche, France by SM UB-32 ( Kaiserliche Marine). Her crew survived.^[48]
Parkgate ( United Kingdom): World War I: The cargo ship was scuttled in the Mediterranean Sea 80 nautical miles (150 km) north east of the Cap de Fer, Algeria (38°12′N 8°10′E / 38.200°N 8.167°E / 38.200; 8.167) by SM U-35 ( Kaiserliche Marine) with the loss of sixteen crew. Her captain was taken as a prisoner of war.^[49]
Penseiro ( Italy): World War I: The cargo ship was scuttled in the Atlantic Ocean 40 nautical miles (74 km) west of the Isles of Scilly by SM UC-71 ( Kaiserliche Marine). Her crew survived.^[50]
Ravenna ( Italy): World War I: The passenger ship was sunk in the Tyrhhenian Sea 2 nautical miles (3.7 km) off Cape Mele, Liguria (44°00′N 8°28′E / 44.000°N 8.467°E / 44.000; 8.467) by SM U-52 ( Kaiserliche Marine).^[51]
San Giovanni Battiste ( Italy): World War I: The sailing vessel was sunk in the Mediterranean Sea by SM UC-37 ( Kaiserliche Marine).^[52]
Trevier ( Belgium) World War I: The cargo ship was torpedoed, shelled and sunk in the North Sea off Scheveningen, South Holland, Netherlands (52°15′N 3°49′E / 52.250°N 3.817°E / 52.250; 3.817 (SS Trevier)) by SM UB-23 ( Kaiserliche Marine).^[53]^[54]
Vladimir Reitz ( Denmark): World War I: The cargo ship was sunk in the Atlantic Ocean 40 nautical miles (74 km) north west by north of Foula, Shetland Islands, United Kingdom by SM U-78 ( Kaiserliche Marine) with the loss of two crew.^[55]

5 April

Amiral L'Hermite ( France): World War I: The schooner was scuttled in the Atlantic Ocean 60 nautical miles (110 km) west north west of the Blasket Islands, County Kerry, United Kingdom by SM U-59 ( Kaiserliche Marine).^[56]
Angel Marina ( Italy): World War I: The sailing vessel was scuttled in the Ligurian Sea (43°16′N 7°10′E / 43.267°N 7.167°E / 43.267; 7.167) by SM U-52 ( Kaiserliche Marine).^[57]
Benheather ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 110 nautical miles (200 km) west north west of the Fastnet Rock (51°20′N 12°30′W / 51.333°N 12.500°W / 51.333; -12.500) by SM U-46 ( Kaiserliche Marine). Her crew survived.^[58]
Bris ( Denmark): World War I: The schooner was sunk in the Atlantic Ocean 20 nautical miles (37 km) north of the Butt of Lewis, Outer Hebrides, United Kingdom by SM U-78 ( Kaiserliche Marine) with the loss of two of her crew.^[59]
Calliope ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Tyrrhenian Sea 35 nautical miles (65 km) south west of Ustica, Italy (38°22′N 11°25′E / 38.367°N 11.417°E / 38.367; 11.417) by SM U-65 ( Kaiserliche Marine) with the loss of six lives. Three survivors were taken as prisoners of war.^[60]
Canadian ( United Kingdom): World War I: The passenger ship was torpedoed and sunk in the Atlantic Ocean 47 nautical miles (87 km) north west of the Fastnet Rock (51°36′N 10°48′W / 51.600°N 10.800°W / 51.600; -10.800) by SM U-59 ( Kaiserliche Marine) with the loss of a crew member.^[61]
Dicto ( Norway): World War I: The cargo ship was sunk in the Atlantic Ocean south east of the Armen Rock by SM UB-39 ( Kaiserliche Marine) with the loss of a crew member.^[62]
Dunkerquois ( France): World War I: The schooner was sunk in the Atlantic Ocean 45 nautical miles (83 km) off the Blasket Islands by SM U-86 ( Kaiserliche Marine).^[63]
Ebenezer ( Denmark): World War I: The three-masted schooner was shelled and sunk in the Atlantic Ocean 10 nautical miles (19 km) south west of St. Kilda, United Kingdom (57°58′N 8°20′W / 57.967°N 8.333°W / 57.967; -8.333) by SM U-57 ( Kaiserliche Marine). Her crew survived.^[64]^[65]
Ernest Legouve ( France): World War I: The barque was torpedoed and sunk in the English Channel 5 nautical miles (9.3 km) west by south of St. Catherine's Point, Isle of Wight, United Kingdom (50°30′N 1°26′W / 50.500°N 1.433°W / 50.500; -1.433) by SM UB-32 ( Kaiserliche Marine) with the loss of twenty of her 24 crew.^[66]
Gower Coast ( United Kingdom): World War I: The coaster struck a mine and sank in the English Channel off Le Tréport, Seine-Maritime, France with the loss of all fifteen crew.^[67]
Marie Celine ( France): World War I: The schooner was sunk in the Atlantic Ocean south west of Ireland by SM U-86 ( Kaiserliche Marine).^[68]
N. J. Fjord ( Denmark): World War I: The cargo ship was scuttled in the North Sea 40 nautical miles (74 km) east north east of Coquet Island, Northumberland, United Kingdom. Her crew survived.^[69]
Roland ( France): World War I: The sailing vessel was sunk in the Atlantic Ocean 80 nautical miles (150 km) west north west of the Blasket Islands by SM U-59 ( Kaiserliche Marine).^[70]
San Fulgencio ( Spain): World War I: The cargo ship was sunk in the Bay of Biscay off Sables d'Olonne, Vendée, France by SM UC-71 ( Kaiserliche Marine).^[71]
Siberier ( Belgium) World War I: The cargo ship was torpedoed and damaged in the Atlantic Ocean 40 nautical miles (74 km) west of the Fastnet Rock (52°18′N 11°40′W / 52.300°N 11.667°W / 52.300; -11.667 (SS Siberier)) by SM U-86 ( Kaiserliche Marine). She was taken in tow but sank the next day.^[72]^[73]
Solstad ( Norway): World War I: The cargo ship was sunk in the Ionian Sea north west of Cythera, Greece (36°02′N 20°50′E / 36.033°N 20.833°E / 36.033; 20.833) by SM U-63 ( Kaiserliche Marine). Her crew survived.^[74]
Vilja ( Norway): World War I: The cargo ship was torpedoed and sunk in the Atlantic OCean 135 nautical miles (250 km) west of the Fastnet Rock (52°12′N 13°07′W / 52.200°N 13.117°W / 52.200; -13.117) by SM U-55 ( Kaiserliche Marine) with the loss of a crew member.^[75]

6 April

Cybele ( France): World War I: The sailing vessel was sunk in the Mediterranean Sea of Cabo de Gata, Almeria, Spain by SM UC-25 ( Kaiserliche Marine).^[76]
Kongshaug ( Norway): World War I: The coaster was captured and scuttled in the North Sea 45 nautical miles (83 km) north of Kinnaird Head, Aberdeenshire, United Kingdom by SM UB-35 ( Kaiserliche Marine). Her crew were rescued by a Scottish fishing vessel.^[77]
La Tour d'Auvergne ( France): World War I: The brig was shelled and set on fire in the Atlantic Ocean 15 nautical miles (28 km) south south east of the Longships Lighthouse by SM UB-39 ( Kaiserliche Marine). She was towed to Mullion, Cornwall, United Kingdom but was declared a constructive total loss. Her crew survived.^[78]
Lord Kitchener ( United Kingdom): World War I: The trawler was scuttled in the North Sea 45 nautical miles (83 km) north by east of Kinnaird Head by SM UB-35 ( Kaiserliche Marine). Her crew survived.^[40]^[79]
Marion ( Norway): World War I: The barque was shelled and sunk in the Atlantic Ocean (52°10′N 13°46′W / 52.167°N 13.767°W / 52.167; -13.767) by SM U-60 ( Kaiserliche Marine) with the loss of a crew member.^[80]
Narberth Castle ( United Kingdom): World War I: The trawler was shelled and sunk in the North Sea 30 nautical miles (56 km) north north west of Dennis Head Old Beacon, North Ronaldsay, Orkney Islands by SM UC-27 ( Kaiserliche Marine). Her crew survived.^[81]
Nestor ( United Kingdom): World War I: The trawler was shelled and sunk in the North Sea 20 nautical miles (37 km) north west by north of North Ronaldsay by SM UC-27 ( Kaiserliche Marine). Her crew survived.^[82]
Perce Neige ( France): World War I: The schooner was sunk in the Atlantic Ocean off Lands End, Cornwall, United Kingdom by SM UB-39 ( Kaiserliche Marine).^[83]
Powhatan ( United Kingdom): World War I: The tanker was torpedoed and sunk in the Atlantic Ocean 25 nautical miles (46 km) north by west of North Rona (59°32′N 6°30′W / 59.533°N 6.500°W / 59.533; -6.500) by SM U-66 ( Kaiserliche Marine) with the loss of 36 crew. Her captain was taken as a prisoner of war.^[10]^[84]
Presto ( United Kingdom): World War I: The cargo ship struck a mine and sank in the North Sea 4 nautical miles (7.4 km) east of Roker Point, Sunderland, County Durham (54°57′N 1°16′W / 54.950°N 1.267°W / 54.950; -1.267) with the loss of six of her crew.^[85]
Rahmanich ( Egypt): World War I: The ship was sunk in the Mediterranean Sea off the coast of Egypt by SM UC-34 ( Kaiserliche Marine).^[86]
Recto ( United Kingdom): World War I: The trawler was scuttled in the North Sea 45 nautical miles (83 km) north by east of Kinnaird Head by SM UB-35 ( Kaiserliche Marine). Her crew survived.^[40]^[87]
Rosalind ( United Kingdom): World War I: The tanker was torpedoed and sunk in the Atlantic Ocean 180 nautical miles (330 km) west north west of the Fastnet Rock (51°39′N 14°20′W / 51.650°N 14.333°W / 51.650; -14.333) by SM U-86 ( Kaiserliche Marine) with the loss of two of her crew.^[88]
Spithead ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 12 nautical miles (22 km) north by west of the Damietta Lighthouse, Egypt (31°44′N 31°46′E / 31.733°N 31.767°E / 31.733; 31.767) by SM UC-34 ( Kaiserliche Marine) with the loss of a crew member.^[10]^[89]
HMT Strathrannoch ( Royal Navy): World War I: The naval trawler struck a mine and sank in the North Sea off St. Abb's Head, Berwickshire (55°55′N 2°07′W / 55.917°N 2.117°W / 55.917; -2.117) with the loss of all thirteen crew.^[90]
Thelma ( Norway): World War I: The cargo ship struck a mine and sank in the English Channel 4 nautical miles (7.4 km) south by west of the Owers Lightship ( United Kingdom) by SM UC-65 ( Kaiserliche Marine) with the loss of a crew member.^[91]
Vine Branch ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean south west of Ireland (49°45′N 14°08′W / 49.750°N 14.133°W / 49.750; -14.133) by SM U-55 ( Kaiserliche Marine) with the loss of all 44 crew.^[92]

7 April

Caminha ( Portugal) World War I: The cargo ship was sunk in the Bay of Biscay 30 nautical miles (56 km) south south west of Cape Ferrat (45°22′N 2°48′W / 45.367°N 2.800°W / 45.367; -2.800 (SS Caminha)) by gunfire from UC-71 ( Kaiserliche Marine).^[93]^[94]
SMS Cormoran ( Kaiserliche Marine): World War I: The merchant raider was scuttled at Guam with the loss of nine crew.
Edwin R. Hunt ( United States): World War I: The schooner was sunk in the Mediterranean Sea 40 nautical miles (74 km) off Cabo de Gata, Almeria, Spain by SM UC-25 ( Kaiserliche Marine). Her crew survived.^[95]
Fiskaa ( Norway): World War I: The barque was sunk in the Atlantic Ocean 10 nautical miles (19 km) off St. Kilda, United Kingdom by SM U-46 ( Kaiserliche Marine). Her crew survived.^[96]
HMS Jason ( Royal Navy): World War I: The minesweeper struck a mine and sank off Coll, Inner Hebrides (56°35′45″N 6°28′15″W / 56.59583°N 6.47083°W / 56.59583; -6.47083) with the loss of 25 crew.^[97]
Lapland ( United Kingdom) World War I: The passenger ship struck a mine off the Liverpool Bar Lightship ( United Kingdom) and was damaged. She was later repaired and returned to service.^[72]
Maplewood ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 47 nautical miles (87 km) south west of Cape Sperone, Sardinia, Italy by SM U-35 ( Kaiserliche Marine). Her crew survived.^[10]^[98]
Salmo ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 210 nautical miles (390 km) north west of the Fastnet Rock (52°30′N 14°40′W / 52.500°N 14.667°W / 52.500; -14.667) by SM U-60 ( Kaiserliche Marine) with the loss of two crew.^[99]
Seward ( United States): World War I: The cargo ship was shelled and sunk in the Mediterranean Sea 22 nautical miles (41 km) north east of Begur, Spain (42°42′N 3°41′E / 42.700°N 3.683°E / 42.700; 3.683) by SM U-52 ( Kaiserliche Marine). Her crew survived.^[100]
Trefusis ( United Kingdom): World War I: The collier was scuttled in the Mediterranean Sea 30 nautical miles (56 km) south east of Cape Pula, Sardinia (38°38′N 9°25′E / 38.633°N 9.417°E / 38.633; 9.417) by SM U-65 ( Kaiserliche Marine). Her crew survived, but three survivors were taken as prisoners of war.^[16]^[101]

8 April

Alba ( Italy): World War I: The cargo ship was sunk in the Mediterranean Sea 3 nautical miles (5.6 km) off Garraf, Catalonia, Spain (41°05′N 1°53′E / 41.083°N 1.883°E / 41.083; 1.883) by SM U-52 ( Kaiserliche Marine).^[102]
SMS G88 ( Kaiserliche Marine): World War I: The V25-class destroyer was torpedoed and sunk in the North Sea by a Royal Navy Coastal Motor Boat.^[103]
Geilan Bahri ( United Kingdom): World War I: The sailing vessel was scuttled in the Mediterranean Sea 54 nautical miles (100 km) off Alexandria, Egypt by SM UC-34 ( Kaiserliche Marine).^[10]^[104]
Livatho ( Greece): World War I: The cargo ship was sunk in the Mediterranean Sea north west of Crete (36°24′N 20°56′E / 36.400°N 20.933°E / 36.400; 20.933) by SM UB-47 ( Kaiserliche Marine). Her crew survived.^[105]
Lucia ( Italy): World War I: The sailing vessel was sunk in the Mediterranean Sea off Cape Pula, Sardinia by SM U-65 ( Kaiserliche Marine).^[106]
Nestos ( Greece): World War I: The cargo ship was sunk in the Mediterranean Sea 50 nautical miles (93 km) west south west of Sapientza (36°27′N 20°59′E / 36.450°N 20.983°E / 36.450; 20.983) by SM UB-47 ( Kaiserliche Marine).^[107]
Papa Gian Battista ( Italy): World War I: The sailing vessel was sunk in the Mediterranean Sea off Cape Pula, Sardinia by SM U-65 ( Kaiserliche Marine).^[108]
Petridge ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 200 nautical miles (370 km) west north west of Ouessant, Finistère, France (48°14′N 10°10′W / 48.233°N 10.167°W / 48.233; -10.167) by SM U-55 ( Kaiserliche Marine). Her crew survived, but two of them were taken as prisoners of war.^[109]
Torrington ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic OCean 150 nautical miles (280 km) south west of the Isles of Scilly by SM U-55 ( Kaiserliche Marine) with the loss of 34 crew. Her captain was taken as a prisoner of war.^[110]
Umvoti ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic OCean 200 nautical miles (370 km) west north west of Ouessant (48°48′N 10°15′W / 48.800°N 10.250°W / 48.800; -10.250) by SM U-55 ( Kaiserliche Marine) with the loss of four crew. Two survivors were taken as prisoners of war.^[10]^[111]

9 April

Avon ( United Kingdom): World War I: The passenger ship struck a mine and sank in the Thames Estuary 2.5 nautical miles (4.6 km) south east by south of the Tongue Lightship ( United Kingdom) (51°29′00″N 1°26′30″E / 51.48333°N 1.44167°E / 51.48333; 1.44167) with the loss of two lives.^[112]
Cairnie ( United Kingdom): The coaster dragged her anchors, collided with another vessel and sank. Her crew were rescued.^[113]
Esterel ( France): World War I: The cargo shipb was sunk in the Mediterranean Sea off Port-Vendres, Pyrénées-Orientales (42°39′N 3°30′E / 42.650°N 3.500°E / 42.650; 3.500) by SM U-52 ( Kaiserliche Marine).^[114]
Fremad I: Norway): World War I: The barque was sunk in the North Sea 200 nautical miles (370 km) off Lindesnes, Vest-Agder (58°47′N 0°52′E / 58.783°N 0.867°E / 58.783; 0.867) by SM U-59 ( Kaiserliche Marine). Her crew survived.^[115]
Ganslei ( Russia): World War I: The cargo ship was sunk in Kola Bay (69°19′N 33°31′E / 69.317°N 33.517°E / 69.317; 33.517) by SM U-75 ( Kaiserliche Marine).^[116]
Kittiwake ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the North Sea 25 nautical miles (46 km) north west of the Maas Lightship ( Netherlands) (52°15′N 3°18′E / 52.250°N 3.300°E / 52.250; 3.300) by SM UB-30 ( Kaiserliche Marine) with the loss of seven crew.^[117]
HMT Ortho ( Royal Navy): World War I: The naval trawler struck a mine and sank in the North Sea off Lowestoft, Suffolk (52°23′00″N 1°52′30″E / 52.38333°N 1.87500°E / 52.38333; 1.87500) with the loss of a crew member.^[118]
Saint Maudez ( France): World War I: The sailing vessel was sunk in the English Channel 10 nautical miles (19 km) north north west of Fécamp, Seine-Maritime by SM UB-39 ( Kaiserliche Marine).^[119]
Themistoclis ( Greece): World War I: The cargo ship was sunk in the Atlantic Ocean 100 nautical miles (190 km) off Pointe Saint-Mathieu, Finistère, France by SM UC-71 ( Kaiserliche Marine).^[120]
Valhall ( Norway): World War I: The cargo ship was sunk in the Atlantic Ocean 30 nautical miles (56 km) north of the Pierres Noires, Finistère by SM UC-71 ( Kaiserliche Marine). Her crew survived.^[121]

10 April

Abd Razid ( Tunisia): World War I: The sailing vessel was sunk in the Mediterranean Sea off Tripoli, Libya by SM UC-20 ( Kaiserliche Marine).^[122]
Dalton ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea off Cape Matapan, Greece (36°00′N 22°40′E / 36.000°N 22.667°E / 36.000; 22.667) by SM U-28 ( Austro-Hungarian Navy). Her crew survived.^[10]^[123]
HMS P26 ( Royal Navy): World War I: The P-class sloop struck a mine and sank in the English Channel off Le Havre, Seine-Maritime, France with the loss of nineteen of her 59crew. Survivors were rescued by HMS P19 ( Royal Navy^[124]^[125]
Pluto ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the North Sea 32 nautical miles (59 km) south east by east of Lowestoft, Suffolk (52°19′N 2°34′E / 52.317°N 2.567°E / 52.317; 2.567) by SM UB-20 ( Kaiserliche Marine). Her crew survived.^[10]^[126]
Porto di Rodi ( Italy: World War I: The cargo ship was sunk in the Ionian Sea 37°53′N 18°02′E / 37.883°N 18.033°E / 37.883; 18.033) SM U-32 ( Kaiserliche Marine) with the loss of 31 crew.^[127]
Ranvik ( Norway): World War I: The cargo ship was sunk in the Atlantic Ocean 45 nautical miles (83 km) west south west of Ouessant, Finistère, France by SM UC-71 ( Kaiserliche Marine). Her crew survived.^[128]
HMHS Salta ( Royal Navy): World War I: The hospital ship struck a mine and sank at Le Havre with the loss of 130 of the 205 people on board.

11 April

HMT Amy ( Royal Navy): World War I: The naval trawler struck a mine and sank in the English Channel off Le Havre, Seine Maritime, France with the loss of nine of her crew.^[129]
Ansgar ( Denmark): World War I: The barquentine was set afire and sunk in the Mediterranean Sea off Cape San Antonio, Spain (39°06′N 0°30′E / 39.100°N 0.500°E / 39.100; 0.500) by SM U-52 ( Kaiserliche Marine). Her crew survived.^[130]
Candia ( Italy): World War I: The cargo ship was sunk in the Mediterranean Sea off Zuwara, Libya by SM UC-20 ( Kaiserliche Marine).^[131]
Cyfarthfa ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 32 nautical miles (59 km) west south west of Antikythera, Greece (35°29′N 22°30′E / 35.483°N 22.500°E / 35.483; 22.500) by SM UB-47 ( Kaiserliche Marine). Her crew survived.^[10]^[132]
Duchess of Cornwall ( United Kingdom): World War I: The cargo ship struck a mine and sank in the English Channel 5 nautical miles (9.3 km) north of Cape Barfleur, Manche, France with the loss of 23 of her crew.^[133]
Imperial Transport ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 140 nautical miles (260 km) north west by north of Alexandria, Egypt by SM UC-34 ( Kaiserliche Marine). Her crew survived, but her captain was taken as a prisoner of war.^[10]^[134]
Miss Morris ( United Kingdom): World War I: The three-masted schooner was scuttled in the Mediterranean Sea 20 nautical miles (37 km) south east of Garrucha, Andalusia, Spain (36°57′N 1°50′W / 36.950°N 1.833°W / 36.950; -1.833) by SM U-35 ( Kaiserliche Marine). Her crew survived.^[135]
Nancy ( Denmark): World War I: The cargo ship was torpedoed and sunk in the North Sea 42 nautical miles (78 km) off the Hellisøy Lighthouse, Hordaland, Norway by SM U-30 ( Kaiserliche Marine) with the loss of three crew.^[136]
Precedent ( United Kingdom): World War I: The fishing smack was scuttled in the English Channel 12 nautical miles (22 km) east south east of Berry Head, Devon by SM UB-38 ( Kaiserliche Marine). Her crew survived.^[40]^[137]
Quaggy ( United Kingdom): World War I: The coaster struck a mine and sank in the North Sea 3 nautical miles (5.6 km) east of Robin Hood's Bay, Yorkshire with the loss of two of her crew.^[138]
Sarvsfos ( Norway): World War I: The barque was sunk in the North Sea 80 nautical miles (150 km) south east of Kirkwall, Orkney Islands (58°33′N 0°00′E / 58.550°N 0.000°E / 58.550; 0.000) by SM U-50 ( Kaiserliche Marine). Her crew survived.^[139]
Saxo ( Denmark: World War I: The coaster was sunk in the North Sea 42 nautical miles (78 km) off the Hellisøy Lighthouse by SM U-30 ( Kaiserliche Marine). Her crew survived.^[140]
Star ( Norway): World War I: The coaster was sunk in the North Sea 68 nautical miles (126 km) off the coast of Fife, United Kingdom by SM U-30 ( Kaiserliche Marine). Her crew survived.^[141]
Sylfiden ( Norway): World War I: The barque was sunk in the Barents Sea 50 nautical miles (93 km) north by west of Holmengrå, Finnmark by SM U-30 ( Kaiserliche Marine). Her crew survived.^[142]
Tremorvah ( United Kingdom): World War I: The cargo ship was shelled and sunk in the Mediterranean Sea 70 nautical miles (130 km) north north west of Cape Bougaroni, Algeria by SM U-65 ( Kaiserliche Marine). Her crew survived, but four of them were taken as prisoners of war.^[10]^[143]

12 April

Angela M. ( Italy): World War I: The three-masted schooner was scuttled in the Mediterranean Sea north west of Cape Bougaroni, Algeria by SM U-65 ( Kaiserliche Marine).^[144]
Caliban ( United Kingdom): World War I: The trawler was shelled and sunk in the North Sea 45 nautical miles (83 km) north east by east of Rattray Head, Aberdeenshire by SM UC-76 ( Kaiserliche Marine). Her crew survived.^[40]^[145]
Chinkiang ( United Kingdom): World War I: The trawler was shelled and sunk in the North Sea 30 nautical miles (56 km) north east by east of Buchan Ness, Aberdeenshire by SM UC-76 ( Kaiserliche Marine). Her crew survived.^[40]^[146]
Crown Prince ( United Kingdom): World War I: The trawler was shelled and sunk in the North Sea 45 nautical miles (83 km) north east by east of Girdle Ness by SM UC-76 ( Kaiserliche Marine). Her crew survived.^[4]
Dina Henderika ( Netherlands): World War I: The sailing vessel was scuttled in the North Sea 30 nautical miles (56 km) east north east of Hartlepool, County Durham, United Kingdom by SM UC-30 ( Kaiserliche Marine).^[147]
Edelweiss ( France): World War I: The sailing vessel was shelled and sunk in the English Channel off Cherbourg, Seine-Maritime by SM UC-71 ( Kaiserliche Marine).^[148]
Equerry ( United Kingdom): World War I: The trawler was shelled and sunk in the North Sea 35 nautical miles (65 km) north east of Kincaid Head by SM UC-76 ( Kaiserliche Marine). Her crew survived.^[149]
Ernst Sophie ( Russia): World War I: The sailing vessel was scuttled in the Atlantic Ocean south west of Ireland (51°05′N 11°58′W / 51.083°N 11.967°W / 51.083; -11.967) by SM UC-27 ( Kaiserliche Marine).^[31]
Fife Ness ( United Kingdom): World War I: The fishing vessel was shelled and sunk in the North Sea 23 nautical miles (43 km) east north east of Fraserburgh, Aberdeenshire by SM UC-76 ( Kaiserliche Marine). Her crew survived.^[40]^[150]
Glencliffe ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 2.5 nautical miles (4.6 km) off Tabarka Island, Alicante, Spain (38°07′N 0°22′W / 38.117°N 0.367°W / 38.117; -0.367) by SM U-52 ( Kaiserliche Marine) with the loss of a crew member. Three survivors were taken as prisoners of war.^[10]^[151]
India ( Greece): World War I: The cargo ship was sunk in the Mediterranean Sea east of Gibraltar by SM U-35 ( Kaiserliche Marine).^[152]
Kildale ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 40 nautical miles (74 km) east of Pantelleria, Italy (36°44′N 12°32′E / 36.733°N 12.533°E / 36.733; 12.533) SM U-32 ( Kaiserliche Marine) with the loss of a crew member.^[153]
Kolaastind ( Norway): World War I: The cargo ship was sunk in the North Sea (60°14′N 2°42′E / 60.233°N 2.700°E / 60.233; 2.700) by SM U-30 ( Kaiserliche Marine) with the loss of four crew.^[154]
Largo Bay ( United Kingdom): World War I: The trawler was shelled and sunk in the North Sea 30 nautical miles (56 km) north east by east of Buchan Ness by SM UC-76 ( Kaiserliche Marine). Her crew survived.^[155]
Lilian ( United Kingdom): World War I: The trawler was shelled and sunk in the North Sea 45 nautical miles (83 km) north east by east of Girdle Ness by SM UC-76 ( Kaiserliche Marine). Her crew survived.^[156]
Lismore ( United Kingdom): World War I: The passenger ship was torpedoed and sunk in the English Channel 22 nautical miles (41 km) north west by north of Le Havre, Seine-Maritime, France (49°48′N 0°18′W / 49.800°N 0.300°W / 49.800; -0.300) by SM UB-38 ( Kaiserliche Marine) with the loss of five lives.^[10]^[157]
Neptunus ( Netherlands): World War I: The sailing vessel was sunk in the North Sea 20 nautical miles (37 km) east north east of Hartlepool by SM UC-30 ( Kaiserliche Marine).^[158]
Niritos ( Greece): World War I: The cargo ship was sunk in the Mediterranean Sea 5 nautical miles (9.3 km) off Augusta, Sicily, Italy (37°13′N 15°20′E / 37.217°N 15.333°E / 37.217; 15.333) by SM U-27 ( Austro-Hungarian Navy).^[159]
Osprey ( United Kingdom): World War I: The trawler was shelled and sunk in the North Sea 45 nautical miles (83 km) north east by east of Girdle Ness by SM UC-76 ( Kaiserliche Marine). Her crew survived.^[160]
Toro ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 200 nautical miles (370 km) west north west of Ouessant, Finistère, France (48°30′N 10°00′W / 48.500°N 10.000°W / 48.500; -10.000) by SM U-55 ( Kaiserliche Marine) with the loss of fourteen crew. Two survivors were taken as prisoners of war.^[10]^[161]
Union ( Denmark): World War I: The schooner was sunk in the North Sea 18 to 20 nautical miles (33 to 37 km) east of the Souter Lighthouse, County Durham by SM UC-30 ( Kaiserliche Marine). Her crew survived.^[162]
Voorwarts ( Netherlands): World War I: The schooner was sunk in the North Sea 20 nautical miles (37 km) east north east of Hartlepool by SM UC-30 ( Kaiserliche Marine).^[163]

13 April

Argyll ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 110 nautical miles (200 km) west of the Bishop Rock, Isles of Scilly (49°23′N 9°07′W / 49.383°N 9.117°W / 49.383; -9.117) by SM U-84 ( Kaiserliche Marine) with the loss of 22 of her crew.^[10]^[164]
Bandon ( United Kingdom): World War I: The cargo ship struck a mine and sank in the Atlantic Ocean 2.5 nautical miles (4.6 km) south west of Mine Head, Cornwall (51°57′N 7°35′W / 51.950°N 7.583°W / 51.950; -7.583) with the loss of 28 of her crew.^[165]
Bokn ( Norway): World War I: The coaster was sunk in the North Sea 95 nautical miles (176 km) off the Hellisøy Lighthouse, Hordaland (60°04′N 0°45′E / 60.067°N 0.750°E / 60.067; 0.750) by SM U-30 ( Kaiserliche Marine). Her crew survived.^[166]
Frixos ( Russia): World War I: The cargo ship was torpedoed and sunk in the North Sea 60 nautical miles (110 km) east of the Shetland Islands, United Kingdom (60°04′N 0°45′E / 60.067°N 0.750°E / 60.067; 0.750) by SM U-30 ( Kaiserliche Marine).^[167]
Gama ( Norway): World War I: The coaster was sunk in the North Sea (60°24′N 1°15′E / 60.400°N 1.250°E / 60.400; 1.250) by SM U-30 ( Kaiserliche Marine). Her crew survived.^[168]
Gambetta ( France): The sailing vessel was sunk in the Bay of Biscay off the Île d'Yeu, Finistère by SM UC-26 ( Kaiserliche Marine).^[169]
Giuseppe Accame ( Italy): World War I: The cargo ship was sunk in the Mediterranean Sea 40 nautical miles (74 km) west of Cape Spartel, Morocco by SM U-35 ( Kaiserliche Marine).^[170]
Glenlora ( Norway): World War I: The barque was sunk in the North Sea (60°36′N 1°53′E / 60.600°N 1.883°E / 60.600; 1.883) by SM U-30 ( Kaiserliche Marine). Her crew survived.^[171]
Kariba ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 260 nautical miles (480 km) west nort west of Ouessant, Finistère, France (48°30′N 11°28′W / 48.500°N 11.467°W / 48.500; -11.467) by SM UC-27 ( Kaiserliche Marine) with the loss of thirteen of her crew.^[10]^[172]
Maria ( United Kingdom): World War I: The schooner was scuttled in the English Channel 25 nautical miles (46 km) south west of Portland Bill, Dorset by SM UB-38 ( Kaiserliche Marine). Her crew survived.^[10]^[173]
HMML 534 ( Royal Navy): World War I: The motor launch was lost in the Mediterranean Sea on this date.^[16]
Odysseus ( Greece): World War I: The cargo ship was sunk in the Mediterranean Sea 30 nautical miles (56 km) west of Cape Spartel by SM U-35 ( Kaiserliche Marine).^[174]
HMT Pitstruan ( Royal Navy): World War I: The naval trawler struck a mine and sank in the North Sea 3 nautical miles (5.6 km) south east of the Noss Head Lighthouse, Shetland Islands with the loss of eleven of her crew.^[175]
Stork ( United Kingdom): World War I: The trawler was scuttled in the North Sea 20 nautical miles (37 km) east of St Abb's Head, Berwickshire by SM UC-41 ( Kaiserliche Marine). Her crew survived.^[40]^[176]
Strathcona ( Canada): World War I: The cargo ship was scuttled in the Atlantic Ocean 145 nautical miles (269 km) west north west of Ronaldsay, Orkney Islands, United Kingdom (59°35′N 5°49′W / 59.583°N 5.817°W / 59.583; -5.817) by SM U-78 ( Kaiserliche Marine) with the loss of nine crew. Three survivors were taken as prisoners of war.^[10]^[177]
Stromboli ( Italy): The cargo ship was sunk in the Mediterranean Sea 50 nautical miles (93 km) west of Cape Spartel by SM U-35 ( Kaiserliche Marine).^[178]
Zara ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the North Sea 90 nautical miles (170 km) off the Hellisøy Lighthouse (60°08′N 1°52′E / 60.133°N 1.867°E / 60.133; 1.867) by SM U-30 ( Kaiserliche Marine) with the loss of 27 lives.^[179]

14 April

HMT Alberta ( Royal Navy): World War I: The naval trawler struck a mine and sank in the North Sea off Grimsby, Lincolnshire (53°45′N 0°51′E / 53.750°N 0.850°E / 53.750; 0.850) with the loss of seven of her crew.^[180]
Andromach ( United Kingdom): World War I: The trawler was scuttled in the Atlantic Ocean west of the Shetland Islands by SM U-78 ( Kaiserliche Marine). Her captain was taken as a prisoner of war. The other eleven crew took to the lifeboat but were not found.^[181]
Cinque Ottobre ( Italy): World War I: The sailing vessel was sunk in the Mediterranean Sea off the coast of Tunisia by SM UC-20 ( Kaiserliche Marine).^[182]
Fjeldli ( Norway): World War I: The coaster was sunk in the North Sea 76 nautical miles (141 km) west by north of the Marstein Lighthouse, Hordaland (60°02′N 2°10′E / 60.033°N 2.167°E / 60.033; 2.167) by SM U-30 ( Kaiserliche Marine). Her crew survived.^[183]
Gange ( French Navy): World War I: The troopship struck a mine and sank in the Mediterranean Sea 33 nautical miles (61 km) north east of Cape Serrat, Algeria (37°24′N 9°50′E / 37.400°N 9.833°E / 37.400; 9.833) by SM UC-37 ( Kaiserliche Marine) with the loss of one life.^[184]
Hermione ( United Kingdom): World War I: The cargo ship struck a mine and was damaged in the Irish Sea off the Coningbeg Lightship ( United Kingdom). She was beached in Dunmore Bay where she was declared a constructive total loss. Subsequently scrapped in situ.^[185]
HMT Orcades ( Royal Navy): World War I: The naval trawler struck a mine and sank in the North Sea off Grimsby with the loss of six of her crew.^[186]
Patagonier ( United Kingdom): World War I: The cargo ship was shelled and sunk in the Mediterranean Sea 135 nautical miles (250 km)) west of Gibraltar (36°00′N 9°00′W / 36.000°N 9.000°W / 36.000; -9.000) by SM U-35 ( Kaiserliche Marine). Her crew survived.^[10]^[187]
Progresso ( Italy): World War I: The tug was sunk in the Mediterranean Sea off the coast of Tunisia by SM UC-20 ( Kaiserliche Marine).^[188]
Spray ( United Kingdom): World War I: The cargo ship was sunk in the North Sea 3.5 nautical miles (6.5 km) north east of the mouth of the River Tyne by SM UC-30 ( Kaiserliche Marine). Her crew survived.^[189]
Tom ( Spain): World War I: The cargo ship was sunk in the Bay of Biscay 12 nautical miles (22 km) off Hourtin, Gironde, France (45°05′N 1°30′W / 45.083°N 1.500°W / 45.083; -1.500) by SM UC-26 ( Kaiserliche Marine). Her crew survived.^[190]
Tres Macs ( Portugal): World War I: The auxiliary sailing vessel was shelled and sunk in the Mediterranean Sea (36°39′N 7°22′W / 36.650°N 7.367°W / 36.650; -7.367) by SM U-52 ( Kaiserliche Marine).^[191]
Venus ( Norway): World War I: The coaster struck a mine and sank in the North Sea 5 nautical miles (9.3 km) off Berwick-upon-Tweed, Northumberland, United Kingdom with the loss of fourteen of her crew.^[192]
Veronica ( Royal Navy) The Acacia-class sloop was damaged in the Mediterranean Sea 45 nautical miles (83 km) north west of Alexandria, Egypt (31°43′N 29°17′E / 31.717°N 29.283°E / 31.717; 29.283) by SM UB-42 ( Kaiserliche Marine).^[193]

15 April

Alert ( United Kingdom): World War I: The coaster struck a mine and sank in the English Channel off Dover, Kent.^[10]
Alessio Cocco ( Italy): World War I: The sailing vessel was sunk in the Mediterranean Sea off the coast of Tunisia by SM UC-20 ( Kaiserliche Marine).^[194]
Arcadian ( United Kingdom): World War I: The troopship was torpedoed and sunk in the Mediterranean Sea 26 nautical miles (48 km) north east of Milos, Greece (36°50′N 24°50′E / 36.833°N 24.833°E / 36.833; 24.833) by SM UC-74 ( Kaiserliche Marine) with the loss of 277 lives.^[10]^[195]
Astræa ( Denmark): World War I: The barquentine was set afire and sunk in the Atlantic Ocean south west of the Isles of Scilly, United Kingdom (49°00′N 10°30′W / 49.000°N 10.500°W / 49.000; -10.500) by SM U-55 ( Kaiserliche Marine) with the loss of seven crew.^[196]
Brothertoft ( United Kingdom): World War I: The trawler was sunk in the North Sea (approximately 55°50′N 1°30′E / 55.833°N 1.500°E / 55.833; 1.500) by SM UC-30 ( Kaiserliche Marine).^[197]
Cameronia ( United Kingdom): World War I: The troopship was torpedoed and sunk in the Mediterranean Sea 150 nautical miles (280 km) east of Malta (35°50′N 17°32′E / 35.833°N 17.533°E / 35.833; 17.533) by SM U-33 ( Kaiserliche Marine) with the loss of 140-210 of the 2,650-plus people on board. Survivors were rescued by HMS Nemesis and HMS Rifleman (both Royal Navy).
Dalmatian ( United Kingdom): World War I: The trawler was scuttled in the North Sea by SM UC-44 ( Kaiserliche Marine). Her nine crew took to the lifeboats but did not survive.^[198]
Fram ( Denmark): World War I: The schooner was shelled and sunk in the North Sea (56°35′N 2°45′W / 56.583°N 2.750°W / 56.583; -2.750) by SM U-93 ( Kaiserliche Marine).^[199]
Gretaston ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean (43°08′N 11°32′W / 43.133°N 11.533°W / 43.133; -11.533) by SM UC-27 ( Kaiserliche Marine) with the loss of all 29 crew.^[200]
Heikina ( Netherlands): World War I: The sailing vessel was sunk in the North Sea by SM UC-44 ( Kaiserliche Marine). Her crew took to the lifeboats but did not survive.^[201]
Mashobra ( United Kingdom): World War I: The passenger ship was torpedoed and sunk in the Mediterranean Sea 140 nautical miles (260 km) south west of Cape Matapan, Greece (35°34′N 20°40′E / 35.567°N 20.667°E / 35.567; 20.667) by SM U-28 ( Austro-Hungarian Navy) with the loss of eight lives. Her captain was taken as a prisoner of war.^[10]^[202]
Møhlenpris ( Norway): World War I: The coaster was sunk in the English Channel 15 nautical miles (28 km) south west of Beachy Head, East Sussex, United Kingdom (50°38′N 0°15′W / 50.633°N 0.250°W / 50.633; -0.250) by SM UB-40 ( Kaiserliche Marine). Her crew survived.^[203]
Panaghi Drakatos ( Greece): World War I: The cargo ship was sunk in the Atlantic Ocean 26 nautical miles (48 km) off Cape Santa Maria, Portugal by SM U-35 ( Kaiserliche Marine). Her crew survived.^[204]
Paris ( Norway): World War I: The cargo ship was sunk in the North Sea 100 nautical miles (190 km) west of Greipengen by SM U-30 ( Kaiserliche Marine). Her crew survived.^[205]
USS Pike ( United States Navy): The Plunger-class submarine sank at Cavite Naval Base, Philippines. She was raised two days later, repaired and returned to service.
Sutterton ( United Kingdom): World War I: The trawler was scuttled in the North Sea 65 nautical miles (120 km) east south east of St Abb's Head, Berwickshire (55°45′N 0°15′W / 55.750°N 0.250°W / 55.750; -0.250) by SM UC-44 ( Kaiserliche Marine) with the loss of a crew member.^[40]^[206]
Tusnastabb ( Norway): World War I: The coaster struck a mine and sank in the English Channel off Cap Gris Nez, Pas-de-Calais, France (50°54′N 1°34′E / 50.900°N 1.567°E / 50.900; 1.567). Her crew survived.^[207]

16 April

Amanda ( Sweden): World War I: The brig was scuttled in the North Sea (56°27′N 3°00′E / 56.450°N 3.000°E / 56.450; 3.000) by SM UC-51 ( Kaiserliche Marine). Her crew survived.^[208]
Anne ( Denmark): World War I: The three-masted schooner was scuttled in the Atlantic Ocean west of Ireland (51°45′N 17°20′W / 51.750°N 17.333°W / 51.750; -17.333) by SM U-43 ( Kaiserliche Marine). Her crew survived.^[209]
HMS C16 ( Royal Navy): The C-class submarine was rammed and sunk at Harwich, Essex by HMS Melampus ( Royal Navy) with the loss of all sixteen crew. She was subsequently salvaged, repaired and returned to service.
Cairndhu ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the English Channel 25 nautical miles (46 km) west of Beachy Head, East Sussex by SM UB-40 ( Kaiserliche Marine) with the loss of eleven of her crew.^[10]^[210]
Crios ( Greece): World War I: The cargo ship was scuttled in the Atlantic Ocean off Cape Espichel, Portugal (38°20′N 9°12′W / 38.333°N 9.200°W / 38.333; -9.200) by SM U-52 ( Kaiserliche Marine).^[211]
Eduard ( United Kingdom): World War I: The three-masted schooner was scuttled in the English Channel 12 nautical miles (22 km) south west of Beachy Head (50°34′N 0°05′E / 50.567°N 0.083°E / 50.567; 0.083) by SM UC-70 ( Kaiserliche Marine). Her crew survived.^[212]
Endymion ( Russia): World War I: The sailing vessel was scuttled in the Atlantic Ocean 250 nautical miles (460 km) west of Galway, United Kingdom (52°30′N 16°20′W / 52.500°N 16.333°W / 52.500; -16.333) by SM U-43 ( Kaiserliche Marine).^[6]
Lord Chancellor ( United Kingdom): World War I: The trawler was scuttled in the North Sea 50 nautical miles (93 km) north east of the Longstone Lighthouse, Northumberland by SM UC-41 ( Kaiserliche Marine). Her crew survived.^[40]^[213]
Marden ( United Kingdom): World War I: The coaster was shelled and sunk in the English Channel 6 nautical miles (11 km) north west of Cap Gris Nez, Pas-de-Calais, France by SM UB-36 ( Kaiserliche Marine) with the loss of a crew member.^[214]
Polycarp ( Norway): World War I: The sailing vessel was sunk in the North Sea (56°23′N 2°52′E / 56.383°N 2.867°E / 56.383; 2.867) by SM UC-51 ( Kaiserliche Marine). Her crew survived.^[215]
Queen Mary ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 180 nautical miles (330 km) north west by north of the Fastnet Rock (51°48′N 14°52′W / 51.800°N 14.867°W / 51.800; -14.867) by SM U-60 ( Kaiserliche Marine) with the loss of nine crew.^[10]^[216]
Rochester Castle ( United Kingdom): World War I: The ketch was shelled and sunk in the English Channel 5 nautical miles (9.3 km) west south west of Cap Gris Nez by SM UB-36 ( Kaiserliche Marine). Her crew survived.^[217]
Rosetta ( Egypt): World War I: The sailing vessel was sunk in the Mediterranean Sea off Gaza by SM UB-42 ( Kaiserliche Marine).^[218]
Sagres ( Portugal): World War I: The cargo shp struck a mine and sank in the Mediterranean Sea off Cap Blanc, Tunisia.^[219]
Smeul ( Romanian Naval Forces): World War I: The torpedo boat struck a mine and sank at Sulina.^[103]
Sontay ( France): World War I: The passenger ship was sunk in the Mediterranean Sea 100 nautical miles (190 km) south east of Malta (35°02′N 16°28′E / 35.033°N 16.467°E / 35.033; 16.467) by SM U-33 ( Kaiserliche Marine). Her crew survived.^[220]
Towergate ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 250 nautical miles (460 km) north west by west of the Fastnet Rock (52°10′N 16°16′W / 52.167°N 16.267°W / 52.167; -16.267) by SM U-43 ( Kaiserliche Marine). Her crew survived.^[10]^[221]
Victoria ( United Kingdom): World War I: The three-masted schooner was scuttled in the English Channel 30 nautical miles (56 km) south west of Beachy Head by SM UB-40 ( Kaiserliche Marine). Her crew survived.^[10]^[222]

17 April

Aburi ( United Kingdom): World War I: The Elder Dempster 3,730 grt cargo liner was torpedoed and sunk in the Atlantic Ocean 125 nautical miles (232 km) north west of Tory Island, County Donegal (56°15′N 11°30′W / 56.250°N 11.500°W / 56.250; -11.500) by SM U-61 ( Kaiserliche Marine) with the loss of 25 crew.^[223]

HMS Arcadian.

HMS Arcadian ( Royal Navy): The troopship was torpedoed and sunk in the Sea of Crete by UC-74 ( Kaiserliche Marine) with the loss of 279 lives.
Bretagne ( Denmark): World War I: The cargo ship was sunk in the North Sea 8 to 9 nautical miles (15 to 17 km) off Rattray Head, Aberdeenshire, United Kingdom (57°43′N 1°42′W / 57.717°N 1.700°W / 57.717; -1.700) by SM UC-45 ( Kaiserliche Marine). Her crew survived.^[224]
Brisbane River ( United Kingdom): World War I: The cargo ship was scuttled in the Atlantic Ocean 140 nautical miles (260 km) west of Gibraltar (35°30′N 8°10′W / 35.500°N 8.167°W / 35.500; -8.167) by SM U-35 ( Kaiserliche Marine). Her crew survived, but her captain was taken as a prisoner of war.^[10]^[225]
Cairnhill ( United Kingdom): World War I: The cargo ship was scuttled in the Atlantic Ocean 160 nautical miles (300 km) south west of the Fastnet Rock (52°09′N 13°16′W / 52.150°N 13.267°W / 52.150; -13.267) by SM U-55 ( Kaiserliche Marine). Her crew survived, but her captain was taken as a prisoner of war.^[10]^[226]
Charles Goodanew ( United Kingdom): World War I: The coaster was sunk in the North Sea 3.5 nautical miles (6.5 km) north north east of Rattray Head (57°39′N 1°45′W / 57.650°N 1.750°W / 57.650; -1.750) by SM UC-45 ( Kaiserliche Marine) with the loss of thirteen of her crew.^[227]
Corfu ( United Kingdom): World War I: The cargo ship was scuttled in the Atlantic Ocean 160 nautical miles (300 km) west of Gibraltar (35°14′N 8°25′W / 35.233°N 8.417°W / 35.233; -8.417) by SM U-35 ( Kaiserliche Marine) with the loss of three crew.^[10]^[228]
Costante ( Italy): World War I: The cargo ship was sunk in the Mediterranean Sea off the coast of Algeria (36°53′N 4°15′E / 36.883°N 4.250°E / 36.883; 4.250) by SM U-32 ( Kaiserliche Marine).^[229]
Dantzic ( United Kingdom): World War I: The schooner was scuttled in the Irish Sea 30 nautical miles (56 km) south by west of St. Ann's Head, Pembrokeshire by SM UC-47 ( Kaiserliche Marine). Her crew survived.^[230]
Donegal ( United Kingdom): World War I: The hospital ship was torpedoed and sunk in the English Channel 19 nautical miles (35 km) south of the Dean Lightship ( United Kingdom) (50°26′N 1°00′W / 50.433°N 1.000°W / 50.433; -1.000) by SM UC-21 ( Kaiserliche Marine) with the loss of 40 lives.^[10]^[231]^[232]
Fernmoor ( United Kingdom): World War I: The cargo ship was scuttled in the Atlantic Ocean 150 nautical miles (280 km) west of Gibraltar (35°30′N 8°18′W / 35.500°N 8.300°W / 35.500; -8.300) by SM U-35 ( Kaiserliche Marine). Her crew survived.^[10]^[233]
Kish ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 160 nautical miles (300 km) north west by west of the Fastnet Rock by SM U-67 ( Kaiserliche Marine) with the loss of six crew.^[10]^[234]
HMHS Lanfranc ( Royal Navy): World War I: The hospital ship was torpedoed and sunk in the English Channel 42 nautical miles (78 km) north of Le Havre, Seine-Maritime, France (50°11′N 0°12′E / 50.183°N 0.200°E / 50.183; 0.200) by SM UB-40 ( Kaiserliche Marine) with the loss of 40 lives.^[235]
Robert ( Denmark): World War I: The cargo ship was torpedoed and sunk in the North Sea 14 nautical miles (26 km) east of Fair Isle, United Kingdom by SM UC-76 ( Kaiserliche Marine) with the loss of eight crew.^[236]
U.S.A. ( United Kingdom): World War I: The fishing vessel was scuttled in the North Sea 16 nautical miles (30 km) east north east of the Longstone Lighthouse, Northumberland (55°54′N 1°06′W / 55.900°N 1.100°W / 55.900; -1.100) by SM UC-41 ( Kaiserliche Marine). Her crew survived.^[40]^[237]
William Shephard ( United Kingdom): World War I: The three-masted schooner was scuttled in the Irish Sea 30 nautical miles (56 km) south by west of St. Ann's Head by SM UC-47 ( Kaiserliche Marine). Her crew survived.^[238]

18 April

Atalanta ( Sweden): World War I: The cargo ship was sunk in the North Sea (56°33′N 4°18′E / 56.550°N 4.300°E / 56.550; 4.300) by SM U-86 ( Kaiserliche Marine). Her crew survived.^[239]
Bergensgut ( Norway): World War I: The cargo ship was sunk in the North Sea 60 nautical miles (110 km) east of Peterhead, Aberdeenshire, United Kingdom by SM UC-76 ( Kaiserliche Marine) with the loss of ten of her crew.^[240]
Castilian ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 110 nautical miles (200 km) north west by north of Tory Island, County Donegal (56°20′N 10°45′W / 56.333°N 10.750°W / 56.333; -10.750) by SM U-61 ( Kaiserliche Marine) with the loss of ten crew.^[10]^[241]
Cragoswald ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 60 nautical miles (110 km) west by south of the Bishop Rock, Isles of Scilly by SM U-84 ( Kaiserliche Marine). with the loss of two of her crew.^[10]^[242]
Heim ( Norway): World War I: The cargo ship struck a mine and sank in the English Channel 10 nautical miles (19 km) north of Pointe d'Ailly, Seine-Maritime, France with the loss of two of her crew. by SM UC-71 ( Kaiserliche Marine). Her crew survived.^[243]
John S. Boyle ( United Kingdom): World War I: The fishing vessel was scuttled in the North Sea 25 nautical miles (46 km) east by south of St Abb's Head, Berwickshire (56°16′N 1°33′W / 56.267°N 1.550°W / 56.267; -1.550) by SM UC-41 ( Kaiserliche Marine). Her crew survived.^[40]^[244]
Louisiana ( Denmark): World War I: The cargo ship wastorpedoed and sunk in the North Sea 20 nautical miles (37 km)) north north east of Buchan Ness, (57°47′N 1°22′W / 57.783°N 1.367°W / 57.783; -1.367) by SM UC-45 ( Kaiserliche Marine). Her crew survived.^[245]
Marcel ( Belgium): World War I: The tug was scuttled in the North Sea 8 nautical miles (15 km) north east of the Noord Hinder Lightship ( Netherlands) by SM UB-23 ( Kaiserliche Marine).^[246]
Rameses ( United Kingdom): World War I: The trawler was scuttled in the North Sea 45 nautical miles (83 km) east of St Abb's Head (56°14′N 1°29′W / 56.233°N 1.483°W / 56.233; -1.483) by SM UC-41 ( Kaiserliche Marine). Her crew survived.^[247]
Rhydwen ( United Kingdom): World War I: the cargo ship was torpedoed and sunk in the Atlantic Ocean 170 nautical miles (310 km) north west by west of the Fastnet Rock (51°40′N 14°00′W / 51.667°N 14.000°W / 51.667; -14.000) by SM U-67 ( Kaiserliche Marine) with the loss of six crew.^[10]^[248]
Rinaldo ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 18 nautical miles (33 km) west by north of Cape Cherchell, Algeria (36°35′N 1°48′E / 36.583°N 1.800°E / 36.583; 1.800) by SM U-32 ( Kaiserliche Marine). Her crew survived.^[10]^[249]
Rowena ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 95 nautical miles (176 km) west by south of the Bishop Rock (49°03′N 8°25′W / 49.050°N 8.417°W / 49.050; -8.417) by SM U-84 ( Kaiserliche Marine) with the loss of a crew member.^[10]^[250]
Scalpa ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 150 nautical miles (280 km) north west by west of the Fastnet Rock by SM U-53 ( Kaiserliche Marine). Her crew survived.^[10]^[251]
Sculptor ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 120 nautical miles (220 km) north west by west of the Fastnet Rock (51°56′N 12°50′W / 51.933°N 12.833°W / 51.933; -12.833) by SM U-53 ( Kaiserliche Marine) with the loss of a crew member.^[10]^[252]
Surcouf ( France): World War I: The sailing vessel was sunk in the English Channel off Île Vierge, Finistère by SM UC-26 ( Kaiserliche Marine). Her crew survived.^[253]
Thomas ( United Kingdom): World War I: The schooner was scuttled in the Atlantic Ocean 40 nautical miles (74 km) off Cape St. Vincent, Portugal by SM UC-27 ( Kaiserliche Marine). Her crew survived.^[254]
Trekieve ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 100 nautical miles (190 km) west of Gibraltar (35°00′N 9°45′W / 35.000°N 9.750°W / 35.000; -9.750) by SM U-35 ( Kaiserliche Marine) with the loss of three crew.^[10]^[255]
Troldfos ( Norway): World War I: The cargo ship was sunk in the Atlantic Ocean 50 nautical miles (93 km) west north west of the Shetland Islands, United Kingdom by SM U-93 ( Kaiserliche Marine). Her crew survived.^[256]
West Lothian ( Norway): World War I: The four-masted barque was torpedoed and sunk in the Atlantic Ocean 50 nautical miles (93 km) west of the Shetland Islands (60°55′N 3°30′W / 60.917°N 3.500°W / 60.917; -3.500) by SM U-93 ( Kaiserliche Marine). Her crew survived.^[257]
Witham ( United Kingdom): World War I: The trawler was shelled and sunk in the North Sea 125 nautical miles (232 km) east by south of St Abb's Head (55°56′N 1°36′E / 55.933°N 1.600°E / 55.933; 1.600) by SM UC-50 ( Kaiserliche Marine). Her crew survived.^[40]^[258]

19 April

Avocet ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 100 nautical miles (190 km) west north west of the Fastnet Rock (51°19′N 12°30′W / 51.317°N 12.500°W / 51.317; -12.500) by SM U-50 ( Kaiserliche Marine). Her crew survived.^[10]^[259]
Bethlehem ( United Kingdom): World War I: The auxiliary sailing vessel struck a mine and sank in the North Sea with the loss of a crew member.^[260]
Cilurnum ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Bay of Biscay 5 nautical miles (9.3 km) south west of Penmarc'h, Finistère, France (47°45′N 4°30′W / 47.750°N 4.500°W / 47.750; -4.500) by SM UC-21 ( Kaiserliche Marine) with the loss of a crew member.^[10]^[261]
Ellida ( Norway): World War I: The cargo ship was sunk in the North Sea 2.5 nautical miles (4.6 km) east north east of Whitby, Yorkshire, United Kingdom by SM UB-41 ( Kaiserliche Marine). Her crew survived.^[262]
Elswick Manor ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 180 nautical miles (330 km) west of Ouessant, Finistère, France (47°36′N 9°32′W / 47.600°N 9.533°W / 47.600; -9.533) by SM U-84 ( Kaiserliche Marine). Her crew survived.^[10]^[263]
Gold Coast ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 14 nautical miles (26 km) south of Mine Head, Cornwall (51°46′N 7°28′W / 51.767°N 7.467°W / 51.767; -7.467) by SM UC-47 ( Kaiserliche Marine). Her crew survived.^[10]^[67]
Howth Head ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 158 nautical miles (293 km) north west of the Fastnet Rock (52°20′N 13°38′W / 52.333°N 13.633°W / 52.333; -13.633) by SM U-60 ( Kaiserliche Marine) with the loss of two crew.^[10]^[264]
Jewel ( United Kingdom): World War I: The brig was scuttled in St. George's Channel 20 nautical miles (37 km) south east of the Coningbeg Lightship ( United Kingdom) by SM UC-47 ( Kaiserliche Marine). Her crew survived.^[265]
HMT Lobelia ( Royal Navy): World War I: The naval trawler struck a mine and sank off Fanad Point, Lough Swilly (55°16′N 7°45′W / 55.267°N 7.750°W / 55.267; -7.750) with the loss of eleven crew.^[266]
Poltava ( United Kingdom): World War I: The coaster struck a mine and sank in the North Sea 3 nautical miles (5.6 km) east north east of the Souter Point Lighthouse, South Shields, County Durham (54°59′00″N 1°16′30″W / 54.98333°N 1.27500°W / 54.98333; -1.27500). Her crew survived.^[267]
SMS Seeadler ( Kaiserliche Marine): The hulk exploded and sank at Wilhelmshaven, Lower Saxony.
Senator Dantziger ( United Kingdom): World War I: the schooner was shelled and sunk in the English Channel 15 nautical miles (28 km) south by east of Newhaven, East Sussex by SM UC-26 ( Kaiserliche Marine). Her crew survived.^[268]
Senhora da Conceicao ( Portugal): World War I: The sailing vessel was scuttled in the Atlantic Ocean north of Cape Finisterre, Spain (43°38′N 10°00′W / 43.633°N 10.000°W / 43.633; -10.000) by SM U-52 ( Kaiserliche Marine).^[269]
Sowwell ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 170 nautical miles (310 km) west of Gibraltar by SM U-35 ( Kaiserliche Marine) with the loss of 21 crew.^[10]^[270]
HMT Star of Freedom ( Royal Navy): World War I: The naval trawler struck a mine and sank in the Atlantic Ocean off Trevose Head, Cornwall (50°35′N 5°25′W / 50.583°N 5.417°W / 50.583; -5.417 with the loss of ten of her crew.^[271]
Tempus ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 130 nautical miles (240 km) north west by west of the Fastnet Rock by SM U-53 ( Kaiserliche Marine) with the loss of a crew member.^[10]^[272]

20 April

Annapolis ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 74 nautical miles (137 km) north west of Eagle Island, County Mayo (55°45′N 11°45′W / 55.750°N 11.750°W / 55.750; -11.750) by SM U-61 and SM U-69 (both Kaiserliche Marine). Her crew survived.^[273]
August ( Russia): World War I: The barque was sunk in the Atlantic Ocean 300 nautical miles (560 km) west of Ireland (50°25′N 16°40′W / 50.417°N 16.667°W / 50.417; -16.667) by SM U-43 ( Kaiserliche Marine).^[274]
Ballochbuie ( United Kingdom): World War I: The coaster was torpedoed and sunk in the North Sea 7 nautical miles (13 km) east of the Isle of May, Fife by SM UC-41 ( Kaiserliche Marine) with the loss of three of her crew.^[10]^[275]
Caithness ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 130 nautical miles (240 km) north west by north of Cape Ortegal, Spain (45°48′N 11°07′W / 45.800°N 11.117°W / 45.800; -11.117) by SM U-52 ( Kaiserliche Marine) with the loss of 47 crew.^[10]^[276]
Erith ( United Kingdom): World War I: The trawler was scuttled in the North Sea 40 nautical miles (74 km) south of Girdleness, Aberdeenshire by SM UC-44 ( Kaiserliche Marine). Her crew survived.^[277]
Emma ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 200 nautical miles (370 km) south west by south of the Fastnet Rock (49°55′N 14°40′W / 49.917°N 14.667°W / 49.917; -14.667) by SM U-50 ( Kaiserliche Marine) with the loss of two crew.^[278]
Georgios ( Greece): World War I: The cargo ship was sunk in the Bay of Biscay 11 nautical miles (20 km) south east of La Vieille, Finistère, France (47°56′N 4°27′W / 47.933°N 4.450°W / 47.933; -4.450) by SM UC-21 ( Kaiserliche Marine).^[279]
Grecian ( United Kingdom): World War I: The trawler was scuttled in the North Sea 22 nautical miles (41 km) north east by east of the Longstone Lighthouse, Northumberland by SM UC-44 ( Kaiserliche Marine). Her crew survived.^[280]
HMT Loch Eye ( Royal Navy): World War I: The naval trawler struck a mine and sank in the Irish Sea 1.25 nautical miles (2.32 km) south west of Hook Point, County Waterford (52°08′N 6°59′W / 52.133°N 6.983°W / 52.133; -6.983 with the loss of seven of her crew.^[281]
Lowdale ( United Kingdom): World War I: The collier was shelled and sunk in the Atlantic Ocean 90 nautical miles (170 km) west by north of Gibraltar by SM U-35 ( Kaiserliche Marine). Her crew survived.^[10]^[282]^[283]
SS Malakand ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 145 nautical miles (269 km) west of the Bishop Rock, Isles of Scilly (49°20′N 10°00′W / 49.333°N 10.000°W / 49.333; -10.000) by SM U-84 ( Kaiserliche Marine) with the loss of a crew member.^[10]^[284]
Nentmoor ( United Kingdom): World War I: The cargo ship was shelled and sunk in the Atlantic Ocean 140 nautical miles (260 km) west of Gibraltar (32°25′N 8°02′W / 32.417°N 8.033°W / 32.417; -8.033) by SM U-35 ( Kaiserliche Marine). Her crew survived.^[10]^[285]
HMS Nepaulin ( Royal Navy): World War I: The auxiliary minesweeper struck a mine and sank in the North Sea off the Dyck Lightship ( United Kingdom) with the loss of nineteen of her crew.^[286]
HMT Othonna ( Royal Navy): World War I: The naval trawler struck a mine and sank in the North Sea (56°17′N 2°27′W / 56.283°N 2.450°W / 56.283; -2.450) with the loss of nine of her crew.^[287]
Portloe ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 160 nautical miles (300 km) west north west of the Fastnet Rock (51°13′N 14°10′W / 51.217°N 14.167°W / 51.217; -14.167) by SM U-67 ( Kaiserliche Marine) with the loss of 24 crew.^[288]
Ringholm ( Norway): World War I: The coaster was sunk in the North Sea 5 nautical miles (9.3 km) off St. Abb's Head, Berwickshire, United Kingdom by SM UC-41 ( Kaiserliche Marine). Her crew survived.^[289]
HMT Ruthin Castle ( Royal Navy): World War I: The naval trawler struck a mine and sank in the North Sea off Skinningrove, Yorkshire (54°37′N 0°53′W / 54.617°N 0.883°W / 54.617; -0.883) with the loss of nine of her crew.^[217]
San Hilario ( United Kingdom): World War I: The tanker was torpedoed and sunk in the Atlantic Ocean 270 nautical miles (500 km) west by north of the Fastnet Rock (50°55′N 16°28′W / 50.917°N 16.467°W / 50.917; -16.467) by SM U-43 ( Kaiserliche Marine). Her crew survived.^[10]^[290]
Torr Head ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 160 nautical miles (300 km) north west by north of the Fastnet Rock (52°10′N 14°00′W / 52.167°N 14.000°W / 52.167; -14.000) by SM U-60 ( Kaiserliche Marine). Her crew survived.^[10]^[291]

21 April

Diadem ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 200 nautical miles (370 km) south west by west of the Fastnet Rock by SM U-50 ( Kaiserliche Marine). Her crew survived.^[10]^[292]
Emile et Charlotte ( France): World War I: The fishing vessel was sunk in the Bay of Biscay north east of the Île d'Yeu, Vendée by SM UC-21 ( Kaiserliche Marine). Her crew survived.^[293]
SMS G42 ( Kaiserliche Marine): World War I: Battle of Dover Strait: The Großes Torpedoboot 1913-class torpedo boat was rammed and sunk in the Strait of Dover by HMS Broke ( Royal Navy) with the loss of 36 of her 83 crew.
SMS G85 ( Kaiserliche Marine): World War I: Battle of Dover Strait: The Großes Torpedoboot 1913-class torpedo boat was torpedoed and sunk in the Strait of Dover by HMS Swift ( Royal Navy).
Gerda ( Norway): World War I: The coaster was sunk in the North Sea 5 nautical miles (9.3 km) south west of Sumburgh Head, Shetland Islands, United Kingdom by SM UC-55 ( Kaiserliche Marine). Her crew survived.^[294]
Giosue ( Italy): World War I: The brigantine was shelled and sunk in the Mediterranean Sea off Tunis, Tunisia (37°53′N 10°06′E / 37.883°N 10.100°E / 37.883; 10.100) by SM U-32 ( Kaiserliche Marine).^[295]
Jedburgh ( United Kingdom): World War I: The trawler was scuttled in the North Sea (35 nautical miles (65 km) north north west of Foula by SM UC-33 ( Kaiserliche Marine). Her crew survived.^[296]
Peik ( Norway): World War I: The coaster was sunk in the North Sea 10 nautical miles (19 km) north of Coquet Island, Northumberland, United Kingdom by SM UC-44 ( Kaiserliche Marine). Her crew survived.^[297]
Pontiac ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 56 nautical miles (104 km) south west of the Fastnet Rock (50°31′N 10°09′W / 50.517°N 10.150°W / 50.517; -10.150) by SM U-53 ( Kaiserliche Marine) with the loss of two crew.^[10]^[298]
Sebek ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 145 nautical miles (269 km) north west of Tory Island, County Donegal (56°12′N 12°20′W / 56.200°N 12.333°W / 56.200; -12.333) by SM U-70 ( Kaiserliche Marine) with the loss of a crew member.^[10]^[299]
Skjold ( Norway): World War I: The barque was shelled and sunk in the Atlantic Ocean west north west of the Fastnet Rock (51°41′N 14°37′W / 51.683°N 14.617°W / 51.683; -14.617) by SM U-61 ( Kaiserliche Marine). Her crew survived.^[300]
Telena ( United Kingdom): World War I: The tanker was torpedoed and sunk in the Atlantic Ocean 170 nautical miles (310 km) west north west of the Fastnet Rock (51°16′N 14°00′W / 51.267°N 14.000°W / 51.267; -14.000) by SM U-61 ( Kaiserliche Marine). Her crew survived.^[10]^[301]
SM UC-30 ( Kaiserliche Marine): World War I: The Type UC II submarine struck a mine and sank in the North Sea 66 nautical miles (122 km) west of Nymindegab, Denmark with the loss of all 26 crew.
Ville de Dieppe ( France): World War I: The barque was shelled and sunk in the Bay of Biscay west of the Île d'Oléron, Charente-Maritime (45°59′N 1°52′W / 45.983°N 1.867°W / 45.983; -1.867) by SM UC-21 ( Kaiserliche Marine). Her crew survived and were rescued by a French Navy submarine.^[302]
Warrior ( United Kingdom): World War I: The cargo ship struck a mine and sank in the Mediterranean Sea 7 nautical miles (13 km) north east of the Fratelli Rocks, Tunisia with the loss of a crew member.^[303]
Yeovil ( United Kingdom): World War I: The trawler was scuttled in the North Sea 35 nautical miles (65 km) north north west of Foula by SM UC-33 ( Kaiserliche Marine) with the loss of a crew member.^[40]^[304]

22 April

Arethusa ( United Kingdom): World War I: The barque was scuttled in the Atlantic Ocean 15 nautical miles (28 km) north west of Eagle Island, County Mayo by SM UC-66 ( Kaiserliche Marine). Her crew survived.^[305]
Blaatind ( Norway): World War I: The cargo ship was sunk in the Tyrrhenian Sea 30 nautical miles (56 km) off Civitavecchia, Lazio, Italy (42°28′N 10°59′E / 42.467°N 10.983°E / 42.467; 10.983) by SM U-33 ( Kaiserliche Marine) with the loss of two crew.^[306]
Capenor ( United Kingdom): World War I: The cargo ship struck a mine and sank in the Bay of Biscay off La Pallice, Charente-Maritime, France (46°06′N 1°17′W / 46.100°N 1.283°W / 46.100; -1.283). Her crew survived.^[307]
Giskø ( Norway): World War I: The cargo ship was sunk in the North Sea (61°03′N 3°28′E / 61.050°N 3.467°E / 61.050; 3.467 by SM U-21 ( Kaiserliche Marine). Her crew survived.^[308]
Godø ( Norway): World War I: The coaster was sunk in the North Sea 16 nautical miles (30 km) east of the Shetland Islands, United Kingdom by SM UC-41 ( Kaiserliche Marine). Her crew survived.^[309]
Maria S. ( Italy): World War I: The sailing vessel was sunk in the Tyrrhenian Sea off Civitavecchia by SM U-33 ( Kaiserliche Marine).^[310]
HMML 431 ( Royal Navy): The motor launch was lost on this date.^[16]
Neepawah ( Canada): World War I: The cargo ship was scuttled in the Atlantic Ocean 120 nautical miles (220 km) south west of the Bishop Rock, Isles of Scilly, United Kingdom by SM U-53 ( Kaiserliche Marine). Her crew survived.^[10]^[311]
Nightingale ( United Kingdom): World War I: The fishing vessel was scuttled in the North Sea 26 nautical miles (48 km) south of Aberdeen by SM UC-44 ( Kaiserliche Marine). Her crew survived.^[312]
Percy Birdsall ( United States): World War I: The schooner was sunk in the Bay of Biscay off the Gironde Estuary by SM UC-21 ( Kaiserliche Marine). Her crew survived.^[313]
Theodore William ( Norway): World War I: The cargo ship was sunk in the North Sea 40 nautical miles (74 km) off the Shetland Islands (60°45′N 0°13′E / 60.750°N 0.217°E / 60.750; 0.217) by SM U-21 ( Kaiserliche Marine). Her crew survived.^[314]
Unione ( Italy): World War I: The brigantine was sunk in the Tyrrhenian Sea off Civitavecchia (42°01′N 10°54′E / 42.017°N 10.900°E / 42.017; 10.900) by SM U-33 ( Kaiserliche Marine).^[315]
Valerie ( Norway): World War I: The barque was shelled and sunk in the Bay of Biscay 30 nautical miles (56 km) west of the Cordouan Lighthouse, Charente Maritime by SM UC-21 ( Kaiserliche Marine). Her crew survived.^[316]
Vestelv ( Norway): World War I: The full-rigged ship was scuttled in the Atlantic Ocean 14 nautical miles (26 km) off Tory Island, County Donegal, United Kingdom by SM U-93 ( Kaiserliche Marine). Her crew survived.^[317]
Woodward Abrahams ( United States): World War I: The three-masted schooner was sunk in the Atlantic Ocean 407 nautical miles (754 km) west of the Fastnet Rock by SM U-43 ( Kaiserliche Marine). Her crew survived.^[318]

23 April

Acadian ( Norway): World War I: The barque was scuttled in the Atlantic Ocean 65 nautical miles (120 km) north west of Tory Island, County Donegal, United Kingdom (55°44′N 9°30′W / 55.733°N 9.500°W / 55.733; -9.500) by SM U-52 ( Kaiserliche Marine). Her crew survived.^[319]
Auriac ( United Kingdom): World War I: The coaster was shelled and sunk in the North Sea 5 nautical miles (9.3 km) east south east of St Abb's Head, Berwickshire by SM UC-44 ( Kaiserliche Marine) with the loss of a crew member.^[10]^[320]
Bandiera E. Moro ( United Kingdom): World War I: The cargo ship was sunk in the Atlantic Ocean 50 nautical miles (93 km) west of Tangier, Morocco by SM U-35 ( Kaiserliche Marine). Her crew survived.^[321]
Baron Stjernblad ( Denmark): World War I: The coaster was sunk in the North Sea 5 nautical miles (9.3 km) north east of Eyemouth, Berwickshire by SM UC-44 ( Kaiserliche Marine). Her crew survived.^[322]
Boro ( Italy): World War I: The sailing vessel was sunk in the Aegean Sea east of Rhodes, Greece by SM UB-42 ( Kaiserliche Marine).^[323]
Calluna ( Denmark): World War I: The barque was sunk in the Atlantic Ocean south west of the Isles of Scilly, United Kingdom (48°51′N 8°38′W / 48.850°N 8.633°W / 48.850; -8.633) by SM U-61 ( Kaiserliche Marine). Her crew survived.^[324]
Cenobic ( Belgium): World War I: The fishing vessel struck a mine and sank in the English Channel off Le Tréport, Seine-Maritime, France with the loss of four of her crew.^[325]
Dykland ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 200 nautical miles (370 km) west north west of the Fastnet Rock by SM U-50 ( Kaiserliche Marine). Her crew survived.^[10]^[326]
Eptapyrgion ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 150 nautical miles (280 km) west of the Isles of Scilly by SM U-53 ( Kaiserliche Marine). Her crew survived.^[10]^[327]
Imataka ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Irish Sea 15 nautical miles (28 km) south south west of the Daunt Rock by SM UC-47 ( Kaiserliche Marine). Her crew survived.^[10]^[328]
Lena ( United Kingdom): World War I: The cargo ship was sunk in the Atlantic Ocean south west of the Isles of Scilly (48°45′N 8°30′W / 48.750°N 8.500°W / 48.750; -8.500) by SM U-61 ( Kaiserliche Marine) with the loss of all 25 crew.^[329]
HMT Lena Melling ( Royal Navy): World War I: The naval trawler struck a mine and sank in the North Sea off the Elbow Lightship ( United Kingdom) (51°22′30″N 1°33′30″E / 51.37500°N 1.55833°E / 51.37500; 1.55833) with the loss of eleven of her crew.^[330]
Marita ( Norway): World War I: The full-rigged ship was sunk in the Atlantic Ocean 110 nautical miles (200 km) west of St. Kilda, Inverness-shire, United Kingdom (58°21′N 10°34′W / 58.350°N 10.567°W / 58.350; -10.567) by SM U-82 ( Kaiserliche Marine). Her crew survived.^[331]
Oswald ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 200 nautical miles (370 km) south west of the Fastnet Rock by SM U-50 ( Kaiserliche Marine). Her crew survived.^[10]^[332]
HMT Rose II ( Royal Navy): World War I: The naval trawler struck a mine and sank in the Irish Sea off Belfast, County Down (54°44′N 5°38′W / 54.733°N 5.633°W / 54.733; -5.633) with the loss of six of her crew.^[333]
Savio ( Italy): World War I: The cargo ship was sunk in the Bay of Biscay 20 nautical miles (37 km) south east of Belle Île, Morbihan, France by SM UC-36 ( Kaiserliche Marine). Her crew survived.^[334]
Scot ( Denmark): World War I: The cargo ship was sunk in the North Sea 12 nautical miles (22 km) east by north of St Abb's Head (56°02′N 1°46′W / 56.033°N 1.767°W / 56.033; -1.767) by SM UC-44 ( Kaiserliche Marine). Her crew survived.^[335]
Stegg ( Norway): World War I: The coaster was sunk in the North Sea (60 nautical miles (110 km) east of Lerwick, Shetland Islands, United Kingdom (60°41′N 0°37′E / 60.683°N 0.617°E / 60.683; 0.617) by SM UC-41 ( Kaiserliche Marine) with the loss of a crew member.^[336]
Svanen ( Denmark): World War I: The full-rigged ship was sunk in the Atlantic Ocean 30 nautical miles (56 km) west north west of Muckle Flugga, Shetland Islands by SM U-60 ( Kaiserliche Marine) with the loss of two crew.^[337]

24 April

Abosso ( United Kingdom): World War I: SS Abosso was a British merchant ship of 7,782 tons owned by the Elder Dempster. Built 1912 by Harland & Wolff and powered by a steam triple expansion engine of 516nhp giving 13 knots. On 24 April 1917 Abosso carrying passengers, mail and gold, was torpedoed and sunk 180 miles W by N of Fastnet, Ireland by German submarine SM U-43 ( Kaiserliche Marine). Loss of 65 lives.^[338]
Amulree ( United Kingdom): World War I: The barque was sunk in the Atlantic Ocean 50 nautical miles (93 km) north by east of Tory Island, County Donegal (56°10′N 8°40′W / 56.167°N 8.667°W / 56.167; -8.667) by SM U-81 ( Kaiserliche Marine). Her crew survived.^[339]
Anglesea ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 160 nautical miles (300 km) south west of the Bishop Rock, Isles of Scilly (48°56′N 10°17′W / 48.933°N 10.283°W / 48.933; -10.283) by SM U-53 ( Kaiserliche Marine). Her crew survived.^[340]
Barnton ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Bay of Biscay 40 nautical miles (74 km) west by south of Pointe de Chassiron, Île d'Oléron, Charente-Maritime, France (45°40′N 2°12′W / 45.667°N 2.200°W / 45.667; -2.200) by SM UC-21 ( Kaiserliche Marine) with the loss of fourteen of her crew.^[10]^[341]
Bien Aime Prof. Luigi ( United Kingdom): World War I: The sailing vessel was scuttled in the Atlantic Ocean off Cape St. Vincent, Portugal (36°53′N 9°10′W / 36.883°N 9.167°W / 36.883; -9.167) by SM U-35 ( Kaiserliche Marine).^[342]
Clan Galbraith ( Norway): World War I: The four-masted barque was scuttled in the Atlantic Ocean west of Ireland (52°30′N 14°00′W / 52.500°N 14.000°W / 52.500; -14.000) by SM U-70 ( Kaiserliche Marine). Her crew survived.^[227]
Cordelia ( Sweden): World War I: The barque was shelled and sunk in the Atlantic Ocean (51°08′N 15°13′W / 51.133°N 15.217°W / 51.133; -15.217 (Cordelia)) by SM U-43 ( Kaiserliche Marine). Her crew survived.^[93]^[343]
Eos ( Denmark): World War I: The three-masted schooner was sunk in the Atlantic Ocean west of Ireland (52°40′N 14°45′W / 52.667°N 14.750°W / 52.667; -14.750) by SM U-70 ( Kaiserliche Marine). Her crew survived.^[344]
Ferndene ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 150 nautical miles (280 km) west of the Bishop Rock by SM U-53 ( Kaiserliche Marine) with the loss of nine crew.^[10]^[345]
Heather ( United Kingdom): World War I: The drifter was scuttled in the Atlantic Ocean 14 nautical miles (26 km) west by nort of the Bishop Rock (49°52′N 6°48′W / 49.867°N 6.800°W / 49.867; -6.800) by SM UC-47 ( Kaiserliche Marine). Her crew survived.^[346]
Kenilworth ( United Kingdom): World War I: The cargo ship struck a mine and sank in the Atlantic Ocean 3.5 nautical miles (6.5 km) west by south of Point St. Mathieu, Finistère, France (48°17′N 4°48′W / 48.283°N 4.800°W / 48.283; -4.800) by SM UC-36 ( Kaiserliche Marine). Her crew survived.^[347]
La Providence ( France): World War I: The schooner was sunk in the Loire Estuary by SM UC-36 ( Kaiserliche Marine).^[348]
HMT Margate ( Royal Navy): World War I: The naval trawler was shelled and sunk in the North Sea off Spurn Head, Yorkshire by SM UC-50 ( Kaiserliche Marine) with the loss of thirteen of her crew.^[349]
Marie Blanche ( France): World War I: The sailing vessel was sunk in the English Channel 30 nautical miles (56 km) north of Cherbourg, Seine Maritime (50°08′N 1°37′W / 50.133°N 1.617°W / 50.133; -1.617) by SM UB-32 ( Kaiserliche Marine) with the loss of a crew member.^[350]
Mayfly ( United Kingdom): World War I: The trawler was shelled and sunk in the North Sea 75 nautical miles (139 km) north east by east of Scarborough, Yorkshire by SM UC-50 ( Kaiserliche Marine) with the loss of three of her crew.^[351]
Metropolis ( Norway): World War I: The four-masted barque was scuttled in the Atlantic Ocean south west of the Isles of Scilly (48°30′N 11°15′W / 48.500°N 11.250°W / 48.500; -11.250) by SM U-61 ( Kaiserliche Marine). Her crew survived.^[352]
Minister Tak van Poortvliet ( Netherlands): World War I: The cargo ship was torpedoed and sunk in the North Sea 20 nautical miles (37 km) off IJmuiden, North Holland (52°42′N 3°32′E / 52.700°N 3.533°E / 52.700; 3.533) by SM UB-10 ( Kaiserliche Marine).^[353]
Nordsøen ( Denmark): World War I: The cargo ship was scuttled in the Atlantic Ocean off Cape St. Vincent (37°02′N 8°54′W / 37.033°N 8.900°W / 37.033; -8.900) by SM U-35 ( Kaiserliche Marine). Her crew survived.^[354]
Plutus ( United Kingdom): World War I: The collier was torpedoed and sunk in the Atlantic Ocean 9 nautical miles (17 km) north West of Trevose Head, Cornwall (50°41′N 5°07′W / 50.683°N 5.117°W / 50.683; -5.117) by SM UC-47 ( Kaiserliche Marine) with the loss if a crew member.^[10]^[16]^[355]
Thistleard ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 135 nautical miles (250 km) west north west of Tory Island (55°10′N 12°00′W / 55.167°N 12.000°W / 55.167; -12.000) by SM U-82 ( Kaiserliche Marine). Her crew survived.^[10]^[356]
Torvore ( Norway): World War I: The cargo ship was sunk in the Atlantic Ocean off Cape St. Vincent (37°00′N 8°54′W / 37.000°N 8.900°W / 37.000; -8.900) by SM U-35 ( Kaiserliche Marine). Her crew survived.^[357]
Upton Castle ( United Kingdom): World War I: The trawler was scuttled in the North Sea 60 nautical miles (110 km) east of the Longstone Lighthouse, Northumberland by SM UC-29 ( Kaiserliche Marine). Her crew survived.^[358]
Valkyrian ( Sweden): World War I: The three-masted schooner was shelled and sunk in the Atlantic Ocean south west of Ireland by SM U-70 ( Kaiserliche Marine) with the loss of a crew member.^[359]
Vestdal ( Norway): World War I: The full-rigged ship was shelled and sunk in the Atlantic Ocean 280 nautical miles (520 km) west of Ireland (52°19′N 15°18′W / 52.317°N 15.300°W / 52.317; -15.300) by SM U-70 ( Kaiserliche Marine) with the loss of a crew member.^[360]
Vilhelm Krag ( Norway): World War I: The cargo ship was sunk in the Atlantic Ocean 5 nautical miles (9.3 km) west of the Pildale Lighthouse, Portugal (37°03′N 8°44′W / 37.050°N 8.733°W / 37.050; -8.733) by SM U-35 ( Kaiserliche Marine). Her crew survived.^[361]

25 April

Abosso ( United Kingdom): World War I: The passenger ship was torpedoed and sunk in the Atlantic Ocean 180 nautical miles (330 km) west by north of the Fastnet Rock (57°10′N 14°58′W / 57.167°N 14.967°W / 57.167; -14.967) by SM U-43 ( Kaiserliche Marine) with the loss of 65 lives.^[10]^[338]
Baigorry ( France): World War I: The cargo ship was scuttled in the Bay of Biscay 15 nautical miles (28 km) south south east of Belle Île, Morbihan (47°04′N 2°54′W / 47.067°N 2.900°W / 47.067; -2.900) by SM UC-21 ( Kaiserliche Marine). Her crew survived.^[362]
Ballarat ( United Kingdom): World War I: The troopship was torpedoed and damaged in the Atlantic Ocean 24 nautical miles (44 km) south by west of the Wolf Rock, Cornwall (49°33′N 5°36′W / 49.550°N 5.600°W / 49.550; -5.600) by SM UB-32 ( Kaiserliche Marine). She was taken under tow but consequently sank (49°51′45″N 5°19′00″W / 49.86250°N 5.31667°W / 49.86250; -5.31667). Her crew survived.^[363]
Elisabeth ( Denmark): World War I: An attempt was made to scuttle the schooner in the Atlantic Ocean 70 to 80 nautical miles (130 to 150 km) south west of Ireland (51°02′N 12°05′W / 51.033°N 12.083°W / 51.033; -12.083) by SM U-53 ( Kaiserliche Marine). The derelict ship was discovered 180 nautical miles (330 km)) north west of the Fastnet Rock on 30 April by SM U-81 ( Kaiserliche Marine), which also attempted to scuttle her, but she was kept afloat by her cargo of Pitch Pine. Although declared a constructive total loss, she was subsequently repaired and returned to service.^[364]
Elizabeth ( Netherlands): World War I: The lugger was scuttled in the North Sea (52°36′N 3°40′E / 52.600°N 3.667°E / 52.600; 3.667) by SM UB-10 ( Kaiserliche Marine). Her crew survived.^[365]
Este ( Denmark): World War I: The barque was sunk in the North Sea 50 nautical miles (93 km) west of Egerø, Norway (58°25′N 3°48′E / 58.417°N 3.800°E / 58.417; 3.800) by SM UB-34 ( Kaiserliche Marine). Her crew survived.^[366]
Etendard ( French Navy): World War I: The Branlebas-class destroyer was torpedoed and sunk in the North Sea off Dunquerque, Nord with the loss of all hands.^[367]
Glenesk ( Norway): World War I: The barque was scuttled in the Atlantic Ocean 75 nautical miles (139 km) west north west of Eagle Island, County Mayo, United Kingdom by SM U-81 ( Kaiserliche Marine). Her crew survived.^[368]
Havila ( Denmark): World War I: The barque was sunk on the Atlantic Ocean 15 nautical miles (28 km) east north east of North Rona,United Kingdom by SM U-58 ( Kaiserliche Marine). Her crew survived.^[369]
Hawthornbank ( Denmark): World War I: The barque was sunk in the Atlantic Ocean 35 nautical miles (65 km) north by east of North Rona by SM U-58 ( Kaiserliche Marine) with the loss of nine crew.^[370]
Heathfield ( Norway): World War I: The barque was scuttled in the Atlantic Ocean 53 nautical miles (98 km) west by north of Eagle Island by SM U-81 ( Kaiserliche Marine). Her crew survived.^[371]
Hesperides ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 130 nautical miles (240 km) north west of the Fastnet Rock (52°00′N 13°50′W / 52.000°N 13.833°W / 52.000; -13.833) by SM U-69 ( Kaiserliche Marine) with the loss of a crew member.^[10]^[372]
Hirondelle ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Bay of Biscay 13 nautical miles (24 km) south by east of Belle Île, Morbihan, France by SM UC-36 ( Kaiserliche Marine). Her crew survived.^[373]
Invermay ( United Kingdom): World War I: The barque was scuttled in the Atlantic Ocean 40 nautical miles (74 km) north west by north of Eagle Island (54°40′N 11°00′W / 54.667°N 11.000°W / 54.667; -11.000) by SM U-81 ( Kaiserliche Marine). Her crew survived.^[374]
Laura ( United Kingdom): World War I: The schooner was set afire and sunk in the Atlantic Ocean 150 nautical miles (280 km) west north west of the Fastnet Rock (51°20′N 13°30′W / 51.333°N 13.500°W / 51.333; -13.500) by SM U-53 ( Kaiserliche Marine). Her crew survived.^[375]
Stephanosis ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 180 nautical miles (330 km) south west of the Fastnet Rock by SM U-82 ( Kaiserliche Marine) with the loss of six of her crew.^[10]^[376]
Sokoto ( Denmark): World War I: The barque was sunk in the Atlantic Ocean 15 nautical miles (28 km) north east by north of North Rona by SM U-58 ( Kaiserliche Marine). Her crew survived.^[377]
Swanmore ( United Kingdom): World War I: The cargo ship was shelled and damaged in the Atlantic Ocean 230 nautical miles (430 km) west north west of the Fastnet Rock by SM U-43 and SM U-93 (both Kaiserliche Marine) She was then torpedoed and sunk by SM U-50 ( Kaiserliche Marine) with the loss of eleven crew.^[378]

26 April

Active ( United Kingdom): World War I: The trawler was scuttled in the North Sea 65 nautical miles (120 km) east by south of the Longstone Lighthouse by SM UC-50 ( Kaiserliche Marine). Her crew survived.^[379]
Agnes Cairns ( United Kingdom): World War I: The sailing vessel was scuttled in the English Channel 8 nautical miles (15 km) north east of Alderney, Channel Islands by SM UC-65 ( Kaiserliche Marine). Her crew survived.^[194]
Aigle ( France): World War I: The brigantine was scuttled in the English Channel 11 nautical miles (20 km) south west of Start Point, Devon, United Kingdom by SM UC-47 ( Kaiserliche Marine).^[380]
Alhama ( United Kingdom): World War I: The cargo ship struck a mine and sank in the English Channel off Calais, Pas-de-Calais, France. Her crew survived.^[381]
Amsteldijk ( Netherlands): World War I: The trawler was sunk in the North Sea off the Haaks Lightship ( Netherlands) (52°56′N 4°10′E / 52.933°N 4.167°E / 52.933; 4.167) by SM UC-63 ( Kaiserliche Marine). Her crew were rescued by the trawler Voorbode ( Netherlands.^[382]
Athole ( United Kingdom): World War I: The auxiliary ketch was shelled and sunk in the English Channel 20 nautical miles (37 km) south of the Owers Lightship ( United Kingdom) by SM UC-65 ( Kaiserliche Marine). Her crew survived.^[383]
Augusta ( Italy): The barque was scuttled in the Mediterranean Sea north east of Cap Bon, Tunisia (37°22′N 11°31′E / 37.367°N 11.517°E / 37.367; 11.517) by SM UC-27 ( Kaiserliche Marine).^[384]
Boy Dennis ( United Kingdom): World War I: The fishing vessel was scuttled in the English Channel 10 nautical miles (19 km) south south west of Start Point, Devon by SM UC-21 ( Kaiserliche Marine). Her crew survived.^[385]
Bretagne et Vendée ( France): World War I: The sailing vessel was sunk in the English Channel off Alderney (49°51′N 2°04′W / 49.850°N 2.067°W / 49.850; -2.067) by SM UC-65 ( Kaiserliche Marine).^[386]
Chertsey ( United Kingdom): World War I: The collier was torpedoed and sunk in the Mediterranean Sea 4 nautical miles (7.4 km) north of Algiers, Algeria (36°52′N 3°05′W / 36.867°N 3.083°W / 36.867; -3.083) by SM UC-67 ( Kaiserliche Marine). Her crew survived.^[10]^[283]^[387]
Ehrglis ( Russia): World War I: The sailing vessel was set afire and sunk in the Atlantic Ocean (51°50′N 17°49′W / 51.833°N 17.817°W / 51.833; -17.817) by SM U-43 ( Kaiserliche Marine).^[388]
Gennarino ( Italy): World War I: The three-masted schooner was scuttled in the Mediterranean Sea off Cap Bon (37°26′N 11°26′E / 37.433°N 11.433°E / 37.433; 11.433) by SM UC-27 ( Kaiserliche Marine).^[389]
Harflete ( United Kingdom): World War I: The cargo ship was torpedoed, shelled and sunk in the Atlantic Ocean 200 nautical miles (370 km) north west by west of the Fastnet Rock (51°54′N 14°48′W / 51.900°N 14.800°W / 51.900; -14.800) by SM U-70 ( Kaiserliche Marine) with the loss of a crew member.^[10]^[390]
Hekla ( Norway): World War I: The three-masted schooner was sunk in the Atlantic Ocean 120 nautical miles (220 km) north west of the Slyne Head Lighthouse, County Galway, United Kingdom by SM U-53 ( Kaiserliche Marine). Her crew survived.^[391]
Hektoria ( Norway): World War I: The cargo ship was sunk in the Atlantic Ocean (50°38′N 18°40′W / 50.633°N 18.667°W / 50.633; -18.667) by SM U-43 ( Kaiserliche Marine). Her crew survived.^[392]
John Lockett ( Norway): World War I: The barque was scuttled in the English Channel 25 nautical miles (46 km) south of The Lizard, Cornwall, United Kingdom (49°32′N 5°05′W / 49.533°N 5.083°W / 49.533; -5.083) by SM UC-47 ( Kaiserliche Marine). Her crew survived.^[393]
Kong Oscar II ( Norway): World War I: The sailing vessel was sunk in the Seine Estuary by SM UB-38 ( Kaiserliche Marine). Her crew survived.^[394]
Monitor ( United Kingdom): World War I: The schooner was scuttled in the Mediterranean Sea 20 nautical miles (37 km) south by east of Cap d'Antibes, Alpes-Maritimes, France (43°11′N 7°52′E / 43.183°N 7.867°E / 43.183; 7.867) by SM U-33 ( Kaiserliche Marine). Her crew survived.^[395]
HMT Plantin ( Royal Navy): World War I: The naval trawler struck a mine and sank in the English Channel 3 nautical miles (5.6 km) east of Anvil Point, Dorset with the loss of nine of her crew.^[396]
HMT Repro ( Royal Navy): World War I: The naval trawler struck a mine and sank in the North Sea off Tod Head, Aberdeenshire (56°53′N 2°08′W / 56.883°N 2.133°W / 56.883; -2.133) with the loss of thirteen of her crew.^[397]
Rio Lages ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 155 nautical miles (287 km) north west by north of the Fastnet Rock (51°38′N 12°52′W / 51.633°N 12.867°W / 51.633; -12.867) by SM U-69 ( Kaiserliche Marine) with the loss of three of her crew.^[10]^[398]
Telefon ( Norway): World War I: The sailing vessel was sunk in the North Sea (54°57′N 1°48′E / 54.950°N 1.800°E / 54.950; 1.800) by SM UC-50 ( Kaiserliche Marine). Her crew survived.^[399]
Vauxhall ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 110 nautical miles (200 km) north west by west of the Fastnet Rock (51°45′N 12°30′W / 51.750°N 12.500°W / 51.750; -12.500) by SM U-69 ( Kaiserliche Marine) with the loss of two of her crew.^[10]^[400]

27 April

HMT Agile ( Royal Navy): World War I: The naval trawler struck a mine and sank in the North Sea 3 nautical miles (5.6 km) east of the Sunk Lightship ( United Kingdom) with the loss of three of her crew.^[401]
HMS Alfalfa ( Royal Navy): World War I: The collier was sunk in the Atlantic Ocean 30 nautical miles (56 km) off the Isles of Scilly (49°15′N 6°20′W / 49.250°N 6.333°W / 49.250; -6.333) by SM UB-32 ( Kaiserliche Marine) with the loss of 30 crew.^[283]^[402]
Beemah ( United Kingdom): World War I: The collier was torpedoed and sunk in the Atlantic Ocean 30 nautical miles (56 km) south west by south of the Bishop Rock, Isles of Scilly by SM UB-32 ( Kaiserliche Marine) with the loss of three of her crew.^[283]^[403]
Burrowa ( United Kingdom): The four-masted barque was scuttled in the Atlantic Ocean 60 nautical miles (110 km) west of the Isles of Scilly by SM UC-65 ( Kaiserliche Marine). Her crew survived.^[404]
Dromore ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 140 nautical miles (260 km) west of Tory Island, County Donegal (56°30′N 11°40′W / 56.500°N 11.667°W / 56.500; -11.667) by SM U-58 ( Kaiserliche Marine). Her crew survived.^[405]
Dunmore Head ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 135 nautical miles (250 km) west of Tory Island (56°12′N 12°00′W / 56.200°N 12.000°W / 56.200; -12.000) by SM U-62 ( Kaiserliche Marine). Her crew survived.^[10]^[147]
Glencluny ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 4 nautical miles (7.4 km) north west of Cape Sigli, Algeria by SM UC-67 ( Kaiserliche Marine) with the loss of four of her crew.^[10]^[406]
Good Hope ( United Kingdom): World War I: The ketch was shelled and sunk in the English Channel 15 nautical miles (28 km) north north west of Barfleur, Manche, France by SM UC-72 ( Kaiserliche Marine). Her crew survived.^[407]
Inveramsay ( United Kingdom): World War I: The barque was shelled and sunk in the Atlantic Ocean north west of Ireland (56°00′N 11°30′W / 56.000°N 11.500°W / 56.000; -11.500) by SM U-62 ( Kaiserliche Marine) with the loss of all hands.^[408]
Jessie ( United Kingdom): World War I: The schooner was scuttled in the English Channel 7 nautical miles (13 km) west of Portland Bill, Dorset by SM UB-38 ( Kaiserliche Marine). Her crew survived.^[409]
Karuma ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 5 nautical miles (9.3 km) north of Cape Sigle (37°09′N 4°50′E / 37.150°N 4.833°E / 37.150; 4.833) by SM UC-67 ( Kaiserliche Marine) with the loss of two of her crew.^[10]^[410]
Langfond ( Norway): World War I: The cargo ship was sunk in the Atlantic Ocean (58°49′N 10°53′W / 58.817°N 10.883°W / 58.817; -10.883) by SM U-58 ( Kaiserliche Marine). Her crew survived.^[411]
Mafalda ( Italy): World War I: The brigantine was scuttled in the Mediterranean Sea (43°06′N 7°40′E / 43.100°N 7.667°E / 43.100; 7.667) by SM U-33 ( Kaiserliche Marine).^[412]
Manchester Citizen ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 240 nautical miles (440 km) north west of the Fastnet Rock (52°30′N 15°40′W / 52.500°N 15.667°W / 52.500; -15.667) by SM U-70 ( Kaiserliche Marine) with the loss of a crew member.^[413]
Margaret B. Rouss ( United States): The schooner was sunk in the Mediterranean Sea 42 nautical miles (78 km) south of Monaco by SM U-33 ( Kaiserliche Marine). Her crew survived.^[414]
Nidelven ( Norway): World War I: The cargo ship struck a mine and sank in the North Sea 10 nautical miles (19 km) north east of Coquet Island, Northumberland, United Kingdom (55°29′N 1°27′W / 55.483°N 1.450°W / 55.483; -1.450) with the loss of three of her crew.^[415]
Ragnhild ( Norway): World War I: The cargo ship struck a mine and sank in the North Sea 10 nautical miles (19 km) north of the mouth of the River Tyne (55°16′N 1°22′W / 55.267°N 1.367°W / 55.267; -1.367) with the loss of two of her crew.^[416]
Uranus ( Italy): World War I: The cargo ship was sunk in the Atlantic Ocean 60 nautical miles (110 km) west of the Fastnet Rock by SM U-81 ( Kaiserliche Marine).^[417]
Verjø ( Norway): World War I: The cargo ship was sunk in the Atlantic Ocean 10 nautical miles (19 km) north of the Stiff Lighthouse, Ouessant, Finistère, France by SM UC-36 ( Kaiserliche Marine) with the loss of ten of her crew.^[418]

28 April

Alu Mendi ( Spain): World War I: The cargo ship was sunk in the Atlantic Ocean 12 nautical miles (22 km) south south east of the Tuskar Rock, Ireland by SM UC-65 ( Kaiserliche Marine).^[419]
Anne Marie ( Norway): World War I: The sailing vessel was sunk in the Atlantic Ocean 160 nautical miles (300 km) north west of Ireland by SM U-70 ( Kaiserliche Marine). Her crew survived.^[57]
Bullmouth ( United Kingdom): World War I: The tanker was torpedoed and sunk in the Atlantic Ocean 125 nautical miles (232 km) north west by west of Tory Island, County Donegal (58°34′N 10°50′W / 58.567°N 10.833°W / 58.567; -10.833) by SM U-58 ( Kaiserliche Marine). Her crew survived.^[10]^[420]
Carmelo Padre ( Italy): World War I: The sailing vessel was sunk in the Strait of Messina by SM U-63 ( Kaiserliche Marine).^[4]
Condor ( Russia): World War I: The cargo ship was sunk in the Atlantic Ocean 90 nautical miles (170 km) west of Ouessant, Finistère, France by SM UC-36 ( Kaiserliche Marine).^[421]
Diana ( Denmark): World War I: The barquentine was damaged in the Atlantic Ocean 200 nautical miles (370 km) south west of the Fastnet Rock (49°40′N 13°10′W / 49.667°N 13.167°W / 49.667; -13.167) by SM U-93 ( Kaiserliche Marine). She was subsequently towed in to Queenstown, County Cork, United Kingdom where she was declared a total loss. Diana was later repaired and returned to service.^[422]
Giuseppe Padre I ( Italy): World War I: The sailing vessel was sunk in the Strait of Messina by SM U-63 ( Kaiserliche Marine).^[423]
Giuseppina G. ( Italy): World War I: The sailing vessel was sunk in the Strait of Messina by SM U-63 ( Kaiserliche Marine).^[424]
I Due Fratelli P. ( Italy): World War I: The sailing vessel was sunk in the Strait of Messina by SM U-63 ( Kaiserliche Marine).^[425]
Jose de Larrinaga ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 150 nautical miles (280 km) west north west of the Fastnet Rock (51°32′N 13°20′W / 51.533°N 13.333°W / 51.533; -13.333) by SM U-81 ( Kaiserliche Marine) with the loss of twelve crew.^[426]
Juliette ( France): World War I: The sailing vessel struck a mine and sank in the Mediterranean Sea off Mostaganem, Algeria.^[427]
Karonga ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Strait of Messina 2 nautical miles (3.7 km) south south east of Cape Schio, Italy by SM U-63 ( Kaiserliche Marine) with the loss of eighteen crew. Her captain was taken as a prisoner of war.^[10]^[428]
Lisetta ( Italy): World War I: The fishing vessel was sunk in the Mediterranean Sea 8 nautical miles (15 km) west of the Îles Sanguinaires, France by SM U-33 ( Kaiserliche Marine). Her crew survived.^[429]
Medina ( United Kingdom): World War I: The passenger ship was torpedoed and sunk in the English Channel off Start Point, Devon (50°15′N 3°30′W / 50.250°N 3.500°W / 50.250; -3.500) by SM UB-31 ( Kaiserliche Marine).
Natale B. ( Italy): World War I: The sailing vessel was sunk in the Strait of Messina by SM U-63 ( Kaiserliche Marine).^[430]
Niobe ( Italy): World War I: The sailing vessel was sunk in the Mediterranean Sea off Malta by SM UC-37 ( Kaiserliche Marine).^[431]
Olga ( Russia): World War I: The cargo ship was shelled and sunk in the Barents Sea 89 nautical miles (165 km) off the North Cape, Finnmark, Norway by SM U-45 ( Kaiserliche Marine).^[432]
Pontiac ( United Kingdom): World War I: The cargo ship was sunk in the Mediterranean Sea 70 nautical miles (130 km) north east of Marsa Susa, Libya (34°04′N 22°06′E / 34.067°N 22.100°E / 34.067; 22.100) by SM UC-74 ( Kaiserliche Marine) with the loss of a crew member. Four of the survivors were taken as prisoners of war.^[298]
Port Jackson ( United Kingdom): World War I: The four-masted barque was torpedoed and sunk in the Atlantic Ocean 180 nautical miles (330 km) west by north of the Fastnet Rock (51°00′N 14°02′W / 51.000°N 14.033°W / 51.000; -14.033) by SM U-67 ( Kaiserliche Marine) with the loss of fourteen crew.^[433]
Pursue ( United Kingdom): World War I: The fishing vessel was scuttled in the English Channel 12 nautical miles (22 km) south west of Bolt Head, Devon by SM UB-32 ( Kaiserliche Marine). Her crew survived.^[434]
San Francesco Di Paola ( Italy): World War I: The sailing vessel was sunk in the Strait of Messina by SM U-63 ( Kaiserliche Marine).^[435]
Teakwood ( United Kingdom): World War I: The tanker was torpedoed and sunk in the Aegean Sea 26 nautical miles (48 km) south west by west of Sapientza, Greece (36°39′N 21°10′E / 36.650°N 21.167°E / 36.650; 21.167) by SM U-14 ( Austro-Hungarian Navy). Her crew survived.^[10]^[436]
Terence ( United Kingdom): World War I: The cargo ship was shelled and sunk in the Atlantic Ocean 150 nautical miles (280 km) west by north of the Fastnet Rock (52°40′N 12°55′W / 52.667°N 12.917°W / 52.667; -12.917) by SM U-81 ( Kaiserliche Marine) with the loss of a crew member.^[10]^[437]
Vacuum ( United States): World War I: The tanker was sunk in the Atlantic Ocean 120 nautical miles (220 km) west of Barra, Outer Hebrides, United Kingdom (57°20′N 10°10′W / 57.333°N 10.167°W / 57.333; -10.167) by SM U-44 ( Kaiserliche Marine) with the loss of 24 crew.^[438]

29 April

Askepot ( Norway): World War I: The full-rigged ship was scuttled in the Atlantic Ocean 125 nautical miles (232 km) west of the Isles of Scilly, United Kingdom (49°48′N 9°17′W / 49.800°N 9.283°W / 49.800; -9.283) by SM U-21 ( Kaiserliche Marine). Her crew survived.^[439]
Bayonnais ( France): World War I: The fishing vessel was scuttled in the Bay of Biscay off Guilvinec, Finistère by SM UC-72 ( Kaiserliche Marine) with the loss of all four crew.^[440]
Carbo I ( Denmark): World War I: The cargo ship was sunk in the North Sea (55°56′N 2°06′E / 55.933°N 2.100°E / 55.933; 2.100) by SM UC-29 ( Kaiserliche Marine). Her crew survived.^[441]
Comedian ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 200 nautical miles (370 km) west of the Bishop Rock, Isles of Scilly (48°06′N 10°45′W / 48.100°N 10.750°W / 48.100; -10.750) by SM U-93 ( Kaiserliche Marine). Her crew survived.^[10]^[442]
Daleby ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 180 nautical miles (330 km) north west of the Fastnet Rock by SM U-70 ( Kaiserliche Marine) with the loss of 25 crew.^[10]^[443]
Dilston Castle ( United Kingdom): World War I: The trawler was scuttled in the North Sea 16 nautical miles (30 km) east by south of Aberdeen (57°10′N 1°32′W / 57.167°N 1.533°W / 57.167; -1.533) by SM UB-22 ( Kaiserliche Marine). Her crew survived.^[40]^[444]
Ellen Harrison ( United Kingdom): World War I: The schooner was shelled and sunk in the English Channel 7 nautical miles (13 km) north west of Cherbourg, Seine-Maritime, France by SM UB-32 ( Kaiserliche Marine). Her crew survived.^[10]^[445]
Eugènie et Lucie ( France): World War I: The sailing vessel was sunk in the Bay of Biscay off Audierne, Finistère by SM UC-72 ( Kaiserliche Marine).^[446]
Frère des Cinq Soeurs ( France): World War I: The sailing vessel was sunk in the Bay of Biscay off Audierne by SM UC-72 ( Kaiserliche Marine) Her crew survived.^[447]
Giuseppe Maria ( Italy): World War I: The sailing vessel was sunk in the Strait of Sicily by SM UC-37 ( Kaiserliche Marine).^[448]
Hurlford ( United Kingdom): The collier was wrecked in Gunna Sound, Scotland.^[449]
Ikbal ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 200 nautical miles (370 km) west by south of the Bishop Rock (48°34′N 12°35′W / 48.567°N 12.583°W / 48.567; -12.583) by SM U-93 ( Kaiserliche Marine). Her crew survived, but three of them were taken as prisoners of war.^[10]^[450]
Mermaid ( United Kingdom): World War I: The schooner was scuttled in the English Channel 18 nautical miles (33 km) south south west of Anvil Point, Devon by SM UB-32 ( Kaiserliche Marine). Her crew survived.^[451]
Petit Ernest ( France): World War I: The fishing vessel was scuttled in the Bay of Biscay off Guilvinec by SM UC-72 ( Kaiserliche Marine) with the loss of all three crew.^[452]
Victoria ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the North Sea 5 nautical miles (9.3 km) north east by north of Scarborough, Yorkshire by SM UB-21 ( Kaiserliche Marine) with the loss of a crew member.^[10]^[222]

30 April

HMT Arfon ( Royal Navy): World War I: The naval trawler struck a mine and sank in the English Channel off St Alban's Head, Dorset (50°30′N 2°10′W / 50.500°N 2.167°W / 50.500; -2.167) with the loss of ten of her crew.^[453]
Argo ( United Kingdom): World War I: The trawler was shelled and sunk in the North Sea 15 nautical miles (28 km) east of Buchan Ness, Aberdeenshire by SM UB-22 ( Kaiserliche Marine). Her crew survived.^[40]^[454]
Ascaro ( Italy): World War I: The cargo ship was sunk in the Atlantic Ocean south west of Ireland (49°10′N 11°40′W / 49.167°N 11.667°W / 49.167; -11.667) by SM U-93 ( Kaiserliche Marine).^[455]
Borrowdale ( Russia): World War I: The barque was stopped and sunk in the Atlantic Ocean south of Ireland (49°00′N 10°20′W / 49.000°N 10.333°W / 49.000; -10.333) by SM U-21 ( Kaiserliche Marine). Her crew survived.^[456]
Chrisomalli Th. Sifneo ( Greece): World War I: The cargo ship was sunk in the Mediterranean Sea east of Algiers, Algeria (36°55′N 4°02′E / 36.917°N 4.033°E / 36.917; 4.033) by SM U-33 ( Kaiserliche Marine). Her crew survived.^[457]
Colbert ( France): World War I: The troopship was torpedoed and sunk in the Mediterranean Sea (37°05′N 8°22′E / 37.083°N 8.367°E / 37.083; 8.367) by SM UC-37 ( Kaiserliche Marine) with the loss of 51 lives.^[458]
Delamere ( United Kingdom): World War I: The UAC 1,525 tons cargo ship was torpedoed and sunk in the Atlantic Ocean 110 nautical miles (200 km) west by north of the Fastnet Rock (51°40′N 13°00′W / 51.667°N 13.000°W / 51.667; -13.000) by SM U-70 ( Kaiserliche Marine) with the loss of ten crew.^[10]^[459]
Eden ( Norway): World War I: The cargo ship was sunk in the English Channel off Worthing, West Sussex, United Kingdom (50°48′N 0°22′W / 50.800°N 0.367°W / 50.800; -0.367) by SM UC-70 ( Kaiserliche Marine). Her crew survived.^[460]
Fortunata ( Italy): World War I: The cargo ship was sunk in the Atlantic Ocean 130 nautical miles (240 km) west of the Fastnet Rock by SM U-62 ( Kaiserliche Marine). Her crew survived.^[461]
Gorizia ( Uruguay): World War I: The cargo ship struck a mine and sank in the English Channel 17 nautical miles (31 km) west by north of Portland Bill, Dorset (50°36′N 2°55′W / 50.600°N 2.917°W / 50.600; -2.917).^[462]
Horsa ( United Kingdom): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 195 nautical miles (361 km) south west by west of the Fastnet Rock (48°43′N 12°35′W / 48.717°N 12.583°W / 48.717; -12.583) by SM U-93 ( Kaiserliche Marine) with the loss of eleven of her crew. One of the survivors was taken as a prisoner of war.^[10]^[463]
Jarstein ( Norway): World War I: The sailing vessel was sunk in the North Sea 80 nautical miles (150 km) south west by west of the Egerä Lighthouse (57°35′N 4°15′E / 57.583°N 4.250°E / 57.583; 4.250) by SM U-61 ( Kaiserliche Marine). Her crew survived.^[464]
Little Mystery ( United Kingdom): World War I: The schooner was scuttled in the English Channel off Portland Bill by SM UC-61 ( Kaiserliche Marine). Her crew survived.^[330]
Parthenon ( Greece): World War I: The cargo ship was sunk in the Atlantic Ocean 200 nautical miles (370 km) south west of the Fastnet Rock (49°25′N 11°58′W / 49.417°N 11.967°W / 49.417; -11.967) by SM U-93 ( Kaiserliche Marine).^[465]
Portbail ( France): World War I: The coaster was sunk in the English Channel north east of Cap Barfleur, Manche (50°05′N 0°55′W / 50.083°N 0.917°W / 50.083; -0.917) by SM UB-32 ( Kaiserliche Marine). Her crew survived.^[466]
HMS Tulip ( Royal Navy): World War I: The Aubretia-class sloop, operating as a Q-ship, was torpedoed and sunk in the Atlantic Ocean south west of Ireland by SM U-62 ( Kaiserliche Marine) with the loss of 102 crew. Her captain survived and was taken as a prisoner of war.^[467]

Unknown date

Agia ( Greece): World War I: The sailing vessel was sunk in the Mediterranean Sea off the coast of North Africa by SM UC-22 ( Kaiserliche Marine).^[468]
Evangelistria ( Greece): World War I: The sailing vessel was sunk in the Mediterranean Sea off the coast of North Africa by SM UC-22 ( Kaiserliche Marine).^[469]
Kyriotis ( Greece): World War I: The sailing vessel was sunk in the Mediterranean Sea off the coast of North Africa by SM UC-22 ( Kaiserliche Marine). Her crew survived.^[470]

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↑ "Odysseus". Uboat.net. Retrieved 4 October 2012.
↑ "Pitstruan". Uboat.net. Retrieved 29 December 2012.
↑ "Stork". Uboat.net. Retrieved 10 December 2012.
↑ "Strathcona". Uboat.net. Retrieved 20 October 2012.
↑ "Stromboli". Uboat.net. Retrieved 4 October 2012.
↑ "Zara". Uboat.net. Retrieved 29 September 2012.
↑ "Alberta". Uboat.net. Retrieved 21 November 2012.
↑ "Andromach". Uboat.net. Retrieved 20 October 2012.
↑ "Cinque Ottobre". Uboat.net. Retrieved 26 November 2012.
↑ "Fjeldli". Uboat.net. Retrieved 29 September 2012.
↑ "Gange". Uboat.net. Retrieved 8 December 2012.
↑ "Hermione". Uboat.net. Retrieved 4 December 2012.
↑ "HMT Orcades". Uboat.net. Retrieved 21 November 2012.
↑ "Patagonier". Uboat.net. Retrieved 4 October 2012.
↑ "Progresso". Uboat.net. Retrieved 26 November 2012.
↑ "Spray". Uboat.net. Retrieved 3 December 2012.
↑ "Tom". Uboat.net. Retrieved 1 December 2012.
↑ "Tres Macs". Uboat.net. Retrieved 9 October 2012.
↑ "Venus". Uboat.net. Retrieved 17 December 2012.
↑ "HMS Veronica". Uboat.net. Retrieved 7 November 2012.
↑ 194.0 194.1 "Alessio Cocco". Uboat.net. Retrieved 26 November 2012.
↑ "Arcadian". Uboat.net. Retrieved 28 December 2012.
↑ "Astræa". Uboat.net. Retrieved 11 October 2012.
↑ "Brothertoft". Uboat.net. Retrieved 3 December 2012.
↑ "Dalmatian". Uboat.net. Retrieved 15 December 2012.
↑ "Fram". Uboat.net. Retrieved 23 October 2012.
↑ "Gretaston". Uboat.net. Retrieved 2 December 2012.
↑ "Heikina". Uboat.net. Retrieved 15 December 2012.
↑ "Mashobra". Uboat.net. Retrieved 31 December 2012.
↑ "Möhlenpris". Uboat.net. Retrieved 6 November 2012.
↑ "Panaghi Drakatos". Uboat.net. Retrieved 4 October 2012.
↑ "Paris". Uboat.net. Retrieved 29 September 2012.
↑ "Sutterton". Uboat.net. Retrieved 15 December 2012.
↑ "Tusnastabb". Uboat.net. Retrieved 21 November 2012.
↑ "Amanda". Uboat.net. Retrieved 18 December 2012.
↑ "Anne". Uboat.net. Retrieved 7 October 2012.
↑ "Cairndhu". Uboat.net. Retrieved 6 November 2012.
↑ "Crios". Uboat.net. Retrieved 9 October 2012.
↑ "Eduard". Uboat.net. Retrieved 26 December 2012.
↑ "Lord Chancellor". Uboat.net. Retrieved 10 December 2012.
↑ "Marden". Uboat.net. Retrieved 4 November 2012.
↑ "Polycarp". Uboat.net. Retrieved 18 December 2012.
↑ "Queen Mary". Uboat.net. Retrieved 13 October 2012.
↑ 217.0 217.1 "Rochester Castle". Uboat.net. Retrieved 4 November 2012.
↑ "Rosetta". Uboat.net. Retrieved 7 November 2012.
↑ "Sagres". Uboat.net. Retrieved 8 December 2012.
↑ "Sontay". Uboat.net. Retrieved 1 October 2012.
↑ "Towergate". Uboat.net. Retrieved 7 October 2012.
↑ 222.0 222.1 "Victoria". Uboat.net. Retrieved 6 November 2012.
↑ "Aburi". Uboat.net. Retrieved 14 October 2012.
↑ "Bretagne". Uboat.net. Retrieved 16 December 2012.
↑ "Brisbane River". Uboat.net. Retrieved 4 October 2012.
↑ "Cairnhill". Uboat.net. Retrieved 11 October 2012.
↑ 227.0 227.1 "Charles Goodanew". Uboat.net. Retrieved 16 December 2012.
↑ "Corfu". Uboat.net. Retrieved 4 October 2012.
↑ "Costante". Uboat.net. Retrieved 30 September 2012.
↑ "Dantzic". Uboat.net. Retrieved 16 December 2012.
↑ "Donegal". Uboat.net. Retrieved 28 November 2012.
↑ "Fight in the Channel." The Times (London). Monday, 23 April 1917. (41459), col A, p. 8.
↑ "Fernmoor". Uboat.net. Retrieved 4 October 2012.
↑ "Kish". Uboat.net. Retrieved 17 October 2012.
↑ "Lanfranc". Uboat.net. Retrieved 6 November 2012.
↑ "Robert". Uboat.net. Retrieved 29 December 2012.
↑ "U.s.a.". Uboat.net. Retrieved 10 December 2012.
↑ "William Shephard". Uboat.net. Retrieved 16 December 2012.
↑ "Atalanta". Uboat.net. Retrieved 22 October 2012.
↑ "Bergensgut". Uboat.net. Retrieved 29 December 2012.
↑ "Castilian". Uboat.net. Retrieved 14 October 2012.
↑ "Cragoswald". Uboat.net. Retrieved 21 October 2012.
↑ "Heim". Uboat.net. Retrieved 26 December 2012.
↑ "John S. Boyle". Uboat.net. Retrieved 10 December 2012.
↑ "Louisiana". Uboat.net. Retrieved 16 December 2012.
↑ "Marcel". Uboat.net. Retrieved 1 November 2012.
↑ "Rameses". Uboat.net. Retrieved 10 December 2012.
↑ "Rhydwen". Uboat.net. Retrieved 17 October 2012.
↑ "Rinaldo". Uboat.net. Retrieved 30 September 2012.
↑ "Rowena". Uboat.net. Retrieved 21 October 2012.
↑ "Scalpa". Uboat.net. Retrieved 10 October 2012.
↑ "Sculptor". Uboat.net. Retrieved 10 October 2012.
↑ "Surcourf". Uboat.net. Retrieved 1 December 2012.
↑ "Thomas". Uboat.net. Retrieved 2 December 2012.
↑ "Trekieve". Uboat.net. Retrieved 4 October 2012.
↑ "Troldfos". Uboat.net. Retrieved 23 October 2012.
↑ "West Lothian". Uboat.net. Retrieved 23 October 2012.
↑ "Witham". Uboat.net. Retrieved 17 December 2012.
↑ "Avocet". Uboat.net. Retrieved 9 October 2012.
↑ "Bethlehem". Uboat.net. Retrieved 20 December 2012.
↑ "Cilurnum". Uboat.net. Retrieved 28 November 2012.
↑ "Ellida". Uboat.net. Retrieved 7 November 2012.
↑ "Elswick Manor". Uboat.net. Retrieved 21 October 2012.
↑ "Howth Head". Uboat.net. Retrieved 13 October 2012.
↑ "Jewel". Uboat.net. Retrieved 16 December 2012.
↑ "Lobelia". Uboat.net. Retrieved 20 October 2012.
↑ "Poltava". Uboat.net. Retrieved 15 December 2012.
↑ "Senator Dantziger". Uboat.net. Retrieved 1 December 2012.
↑ "Senhora Da Conceicao". Uboat.net. Retrieved 9 October 2012.
↑ "Sowwell". Uboat.net. Retrieved 4 October 2012.
↑ "Star Of Freedom". Uboat.net. Retrieved 16 December 2012.
↑ "Tempus". Uboat.net. Retrieved 10 October 2012.
↑ "Annapolis". Uboat.net. Retrieved 18 October 2012.
↑ "August". Uboat.net. Retrieved 7 October 2012.
↑ "Ballochbuie". Uboat.net. Retrieved 10 December 2012.
↑ "Caithness". Uboat.net. Retrieved 9 October 2012.
↑ "Erith". Uboat.net. Retrieved 15 December 2012.
↑ "Emma". Uboat.net. Retrieved 9 October 2012.
↑ "Georgios". Uboat.net. Retrieved 28 November 2012.
↑ "Grecian". Uboat.net. Retrieved 15 December 2012.
↑ "Loch Eye". Uboat.net. Retrieved 4 December 2012.
↑ "Lowdale". Uboat.net. Retrieved 4 October 2012.
↑ 283.0 283.1 283.2 283.3 "BRITISH NAVAL VESSELS LOST AT SEA Part 1 of 2 - Abadol (oiler) to Lynx (destroyer)". Naval History. Retrieved 2 February 2013.
↑ "Malakand". Uboat.net. Retrieved 21 October 2012.
↑ "Nentmoor". Uboat.net. Retrieved 4 October 2012.
↑ "Nepaulin". Uboat.net. Retrieved 28 October 2012.
↑ "Othonna". Uboat.net. Retrieved 10 December 2012.
↑ "Portloe". Uboat.net. Retrieved 17 October 2012.
↑ "Ringholm". Uboat.net. Retrieved 10 December 2012.
↑ "San Hilario". Uboat.net. Retrieved 7 October 2012.
↑ "Torr Head". Uboat.net. Retrieved 13 October 2012.
↑ "Diadem". Uboat.net. Retrieved 9 October 2012.
↑ "Emile Et Charlotte". Uboat.net. Retrieved 28 November 2012.
↑ "Gerda". Uboat.net. Retrieved 20 December 2012.
↑ "Giosue". Uboat.net. Retrieved 30 September 2012.
↑ "Jedburgh". Uboat.net. Retrieved 4 December 2012.
↑ "Peik". Uboat.net. Retrieved 15 December 2012.
↑ 298.0 298.1 "Pontiac". Uboat.net. Retrieved 10 October 2012.
↑ "Sebek". Uboat.net. Retrieved 18 October 2012.
↑ "Skjold". Uboat.net. Retrieved 14 October 2012.
↑ "Telena". Uboat.net. Retrieved 14 October 2012.
↑ "Ville De Dieppe". Uboat.net. Retrieved 28 November 2012.
↑ "Warrior". Uboat.net. Retrieved 8 December 2012.
↑ "Yeovil". Uboat.net. Retrieved 4 December 2012.
↑ "Arethusa". Uboat.net. Retrieved 25 December 2012.
↑ "Blaatind". Uboat.net. Retrieved 1 October 2012.
↑ "Capenor". Uboat.net. Retrieved 29 November 2012.
↑ "Giskö". Uboat.net. Retrieved 27 September 2012.
↑ "Godø". Uboat.net. Retrieved 10 December 2012.
↑ "Maria S.". Uboat.net. Retrieved 1 October 2012.
↑ "Neepawah". Uboat.net. Retrieved 10 October 2012.
↑ "Nightingale". Uboat.net. Retrieved 15 December 2012.
↑ "Percy Birdsall". Uboat.net. Retrieved 29 November 2012.
↑ "Theodore William". Uboat.net. Retrieved 27 September 2012.
↑ "Unione". Uboat.net. Retrieved 1 October 2012.
↑ "Valerie". Uboat.net. Retrieved 29 November 2012.
↑ "Vestelv". Uboat.net. Retrieved 23 October 2012.
↑ "Woodward Abrahams". Uboat.net. Retrieved 7 October 2012.
↑ "Acadian". Uboat.net. Retrieved 9 October 2012.
↑ "Auriac". Uboat.net. Retrieved 15 December 2012.
↑ "Bandiera E. Moro". Uboat.net. Retrieved 4 October 2012.
↑ "Baron Stjernblad". Uboat.net. Retrieved 15 December 2012.
↑ "Boro". Uboat.net. Retrieved 7 November 2012.
↑ "Calluna". Uboat.net. Retrieved 14 October 2012.
↑ "Cenobic". Uboat.net. Retrieved 26 December 2012.
↑ "Dykland". Uboat.net. Retrieved 9 October 2012.
↑ "Eptapyrgion". Uboat.net. Retrieved 10 October 2012.
↑ "Imataka". Uboat.net. Retrieved 16 December 2012.
↑ "Lena". Uboat.net. Retrieved 14 October 2012.
↑ 330.0 330.1 "Lena Melling". Uboat.net. Retrieved 21 November 2012.
↑ "Marita". Uboat.net. Retrieved 21 October 2012.
↑ "Oswald". Uboat.net. Retrieved 9 October 2012.
↑ "HMT Rose Ii". Uboat.net. Retrieved 25 December 2012.
↑ "Savio". Uboat.net. Retrieved 7 December 2012.
↑ "Scot". Uboat.net. Retrieved 15 December 2012.
↑ "Stegg". Uboat.net. Retrieved 10 December 2012.
↑ "Svanen". Uboat.net. Retrieved 13 October 2012.
↑ 338.0 338.1 "Abosso". Uboat.net. Retrieved 1 September 2013.
↑ "Amulree". Uboat.net. Retrieved 21 October 2012.
↑ "Anglesea". Uboat.net. Retrieved 10 October 2012.
↑ "Barnton". Uboat.net. Retrieved 29 November 2012.
↑ "Bien Aime Prof. Luigi". Uboat.net. Retrieved 4 October 2012.
↑ "Cordelia". Uboat.net. Retrieved 7 October 2012.
↑ "Eos". Uboat.net. Retrieved 18 October 2012.
↑ "Ferndene". Uboat.net. Retrieved 10 October 2012.
↑ "Heather". Uboat.net. Retrieved 16 December 2012.
↑ "Kenilworth". Uboat.net. Retrieved 7 December 2012.
↑ "La Providence". Uboat.net. Retrieved 7 December 2012.
↑ "Margate". Uboat.net. Retrieved 17 December 2012.
↑ "Marie Blanche". Uboat.net. Retrieved 2 November 2012.
↑ "Mayfly". Uboat.net. Retrieved 17 December 2012.
↑ "Metropolis". Uboat.net. Retrieved 14 October 2012.
↑ "Minister Tak Van Poortvliet". Uboat.net. Retrieved 28 October 2012.
↑ "Nordsøen". Uboat.net. Retrieved 4 October 2012.
↑ "Plutus". Uboat.net. Retrieved 16 December 2012.
↑ "Thistleard". Uboat.net. Retrieved 21 October 2012.
↑ "Torvore". Uboat.net. Retrieved 4 October 2012.
↑ "Upton Castle". Uboat.net. Retrieved 3 December 2012.
↑ "Valkyrian". Uboat.net. Retrieved 18 October 2012.
↑ "Vestdal". Uboat.net. Retrieved 18 October 2012.
↑ "Vilhelm Krag". Uboat.net. Retrieved 4 October 2012.
↑ "Baigorry". Uboat.net. Retrieved 29 November 2012.
↑ "Ballarat". Uboat.net. Retrieved 2 November 2012.
↑ "Elisabeth". Uboat.net. Retrieved 21 October 2012.
↑ "Elizabeth". Uboat.net. Retrieved 28 October 2012.
↑ "Este". Uboat.net. Retrieved 3 November 2012.
↑ "French Navy". Naval History. Retrieved 21 February 2013.
↑ "Glenesk". Uboat.net. Retrieved 21 October 2012.
↑ "Havila". Uboat.net. Retrieved 12 October 2012.
↑ "Hawthornbank". Uboat.net. Retrieved 12 October 2012.
↑ "Heathfield". Uboat.net. Retrieved 21 October 2012.
↑ "Hesperides". Uboat.net. Retrieved 18 October 2012.
↑ "Hirondelle". Uboat.net. Retrieved 7 December 2012.
↑ "Invermay". Uboat.net. Retrieved 21 October 2012.
↑ "Laura". Uboat.net. Retrieved 10 October 2012.
↑ "Hackensack". Uboat.net. Retrieved 21 October 2012.
↑ "Sokoto". Uboat.net. Retrieved 12 October 2012.
↑ "Swanmore". Uboat.net. Retrieved 9 October 2012.
↑ "Active". Uboat.net. Retrieved 17 December 2012.
↑ "Aigle". Uboat.net. Retrieved 16 December 2012.
↑ "Alhama". Uboat.net. Retrieved 28 October 2012.
↑ "Amsteldijk". Uboat.net. Retrieved 22 December 2012.
↑ "Athole". Uboat.net. Retrieved 24 December 2012.
↑ "Augusta". Uboat.net. Retrieved 2 December 2012.
↑ "Boy Dennis". Uboat.net. Retrieved 29 November 2012.
↑ "Bretagne Et Vendee". Uboat.net. Retrieved 24 December 2012.
↑ "Chertsey". Uboat.net. Retrieved 25 December 2012.
↑ "Ehrglis". Uboat.net. Retrieved 7 October 2012.
↑ "Gennarino". Uboat.net. Retrieved 2 December 2012.
↑ "Harflete". Uboat.net. Retrieved 18 October 2012.
↑ "Hekla". Uboat.net. Retrieved 10 October 2012.
↑ "Hektoria". Uboat.net. Retrieved 7 October 2012.
↑ "John Lockett". Uboat.net. Retrieved 16 December 2012.
↑ "Kong Oscar Ii". Uboat.net. Retrieved 5 November 2012.
↑ "Monitor". Uboat.net. Retrieved 1 October 2012.
↑ "HMD Plantin". Uboat.net. Retrieved 28 December 2012.
↑ "Repro". Uboat.net. Retrieved 10 December 2012.
↑ "Rio Lages". Uboat.net. Retrieved 18 October 2012.
↑ "Telefon". Uboat.net. Retrieved 17 December 2012.
↑ "Vauxhall". Uboat.net. Retrieved 18 October 2012.
↑ "Agile". Uboat.net. Retrieved 21 November 2012.
↑ "Alfalfa". Uboat.net. Retrieved 2 November 2012.
↑ "Beemah". Uboat.net. Retrieved 2 November 2012.
↑ "Burrowa". Uboat.net. Retrieved 24 December 2012.
↑ "Dromore". Uboat.net. Retrieved 12 October 2012.
↑ "Glencluny". Uboat.net. Retrieved 25 December 2012.
↑ "Good Hope". Uboat.net. Retrieved 28 December 2012.
↑ "Inveramsay". Uboat.net. Retrieved 15 October 2012.
↑ "Jessie". Uboat.net. Retrieved 5 November 2012.
↑ "Karuma". Uboat.net. Retrieved 25 December 2012.
↑ "Langfond". Uboat.net. Retrieved 12 October 2012.
↑ "Mafalda". Uboat.net. Retrieved 1 October 2012.
↑ "Manchester Citizen". Uboat.net. Retrieved 18 October 2012.
↑ "MBR". Uboat.net. Retrieved 1 October 2012.
↑ "Nidelven". Uboat.net. Retrieved 3 December 2012.
↑ "Ragnhild". Uboat.net. Retrieved 3 December 2012.
↑ "Uranus". Uboat.net. Retrieved 21 October 2012.
↑ "Verjø". Uboat.net. Retrieved 7 December 2012.
↑ "Alu Mendi". Uboat.net. Retrieved 24 December 2012.
↑ "Bullmouth". Uboat.net. Retrieved 12 October 2012.
↑ "Condor". Uboat.net. Retrieved 7 December 2012.
↑ "Diana". Uboat.net. Retrieved 23 October 2012.
↑ "Giuseppe Padre I". Uboat.net. Retrieved 16 October 2012.
↑ "Giuseppina G.". Uboat.net. Retrieved 16 October 2012.
↑ "I Due Fratelli P.". Uboat.net. Retrieved 16 October 2012.
↑ "Jose de Larrinaga". Uboat.net. Retrieved 21 October 2012.
↑ "Juliette". Uboat.net. Retrieved 1 December 2012.
↑ "Karonga". Uboat.net. Retrieved 16 October 2012.
↑ "Lisetta". Uboat.net. Retrieved 1 October 2012.
↑ "Natale B.". Uboat.net. Retrieved 16 October 2012.
↑ "Niobe". Uboat.net. Retrieved 8 December 2012.
↑ "Olga". Uboat.net. Retrieved 8 October 2012.
↑ "Port Jackson". Uboat.net. Retrieved 17 October 2012.
↑ "Pursue". Uboat.net. Retrieved 2 November 2012.
↑ "San Francesco Di Paola". Uboat.net. Retrieved 16 October 2012.
↑ "Teakwood". Uboat.net. Retrieved 30 December 2012.
↑ "Terence". Uboat.net. Retrieved 21 October 2012.
↑ "Vacuum". Uboat.net. Retrieved 7 October 2012.
↑ "Askepot". Uboat.net. Retrieved 27 September 2012.
↑ "Bayonnais". Uboat.net. Retrieved 28 December 2012.
↑ "Carbo I". Uboat.net. Retrieved 3 December 2012.
↑ "Comedian". Uboat.net. Retrieved 23 October 2012.
↑ "Daleby". Uboat.net. Retrieved 18 October 2012.
↑ "Dilston Castle". Uboat.net. Retrieved 31 October 2012.
↑ "Ellen Harrison". Uboat.net. Retrieved 2 November 2012.
↑ "Eugenie Et Lucie". Uboat.net. Retrieved 28 December 2012.
↑ "Frere Des Cinq Soeurs". Uboat.net. Retrieved 28 December 2012.
↑ "Giuseppe Maria". Uboat.net. Retrieved 8 December 2012.
↑ "SS Hurlford [+1917]". Wrecksite. Retrieved 2 February 2013.
↑ "Ikbal". Uboat.net. Retrieved 23 October 2012.
↑ "Mermaid". Uboat.net. Retrieved 2 November 2012.
↑ "Petit Ernest". Uboat.net. Retrieved 28 December 2012.
↑ "Arfon". Uboat.net. Retrieved 21 December 2012.
↑ "Argo". Uboat.net. Retrieved 31 October 2012.
↑ "Ascaro". Uboat.net. Retrieved 23 October 2012.
↑ "Borrowdale". Uboat.net. Retrieved 27 September 2012.
↑ "Chrisomalli Th. Sifneo". Uboat.net. Retrieved 1 October 2012.
↑ "Colbert". Uboat.net. Retrieved 8 December 2012.
↑ "Delamere". Uboat.net. Retrieved 18 October 2012.
↑ "Eden". Uboat.net. Retrieved 26 December 2012.
↑ "Fortunata". Uboat.net. Retrieved 15 October 2012.
↑ "Gorizia". Uboat.net. Retrieved 21 December 2012.
↑ "Horsa". Uboat.net. Retrieved 23 October 2012.
↑ "Jarstein". Uboat.net. Retrieved 14 October 2012.
↑ "Parthenon". Uboat.net. Retrieved 23 October 2012.
↑ "Portbail". Uboat.net. Retrieved 2 November 2012.
↑ "Tulip". Uboat.net. Retrieved 15 October 2012.
↑ "Agia". Uboat.net. Retrieved 29 November 2012.
↑ "Evangelistria". Uboat.net. Retrieved 29 November 2012.
↑ "Kyriotis". Uboat.net. Retrieved 29 November 2012.

Shipwrecks 1914–18, by month

1914	Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Unknown date

1915	Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Unknown date

1916	Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Unknown date

1917	Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Unknown date

1918	Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Unknown date

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