| dbp:desc
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- 0001-04-03 (xsd:gMonthDay)
- 0001-04-06 (xsd:gMonthDay)
- 0001-04-07 (xsd:gMonthDay)
- 0001-04-16 (xsd:gMonthDay)
- 0001-04-20 (xsd:gMonthDay)
- 0001-04-21 (xsd:gMonthDay)
- 0001-04-23 (xsd:gMonthDay)
- 0001-04-26 (xsd:gMonthDay)
- 0001-04-27 (xsd:gMonthDay)
- 0001-05-01 (xsd:gMonthDay)
- 0001-05-07 (xsd:gMonthDay)
- 0001-05-16 (xsd:gMonthDay)
- 0001-10-22 (xsd:gMonthDay)
- 0001-12-31 (xsd:gMonthDay)
- 4200.0
- 4620.0
- 2.209032E9
- World War II: Convoy ON 178: The cargo ship was torpedoed and sunk in the Atlantic Ocean by with the loss of two of her 40 crew. Survivors were rescued by . (en)
- World War II: The transport was torpedoed and sunk in the Mediterranean Sea off Capo di Milazzo, Sicily, Italy by . (en)
- World War II: The cargo ship was bombed and sunk in Milne Bay by Japanese aircraft with the loss of four lives. (en)
- The yard patrol craft ran aground and sank on the Tumbo Reef, south east of the North Bulari Passagea break in the reefs on the approach to Nouméa, New Caledonia. (en)
- World War II: The cargo ship was torpedoed and sunk in the Pacific Island off the Bonin Islands by . Four crewmen were killed. (en)
- World War II: The ran aground at Ras Ahmer, west of Cape Bon, Tunisia, and was wrecked. Her whole crew was rescued. (en)
- World War II: Convoy HX 233: The Fort ship straggled behind the convoy. She was torpedoed and damaged in the Atlantic Ocean by . She was later torpedoed again by U-628 and then torpedoed, shelled and sunk east north east of the Azores, Portugal by with the loss of six of her 56 crew. Survivors were rescued by . (en)
- World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean off French Sudan by with the loss of 12 of her 43 crew. Survivors were rescued by . (en)
- World War II: The minesweeper was bombed and sunk in the North Sea off Den Helder, the Netherlands. (en)
- World War II: Operation Mardonius: The cargo ship was sunk at Oslo, Norway due to sabotage by the Norwegian resistance movement. She was later raised, repaired and returned to service. (en)
- World War II: Convoy ONS 5: The cargo ship was torpedoed and damaged in the Atlantic Ocean by with the loss of one of her 68 crew. Survivors were rescued by . McKeesport was later torpedoed and sunk by U-258. (en)
- World War II: The cargo ship was torpedoed and sunk in the Pacific Ocean south east of Cape Byron, Australia by . (en)
- World War II: Convoy TS 37: The cargo ship was torpedoed and sunk in the Atlantic Ocean south west of Freetown by with the loss of six of her 77 crew. (en)
- World War II: The fleet oiler was torpedoed and damaged north of Palau by . She sank the next day. (en)
- World War II: The was bombed and sunk in the Atlantic Ocean off Brazil by a USN Consolidated PBY of Squadron VP 83. (en)
- The landing craft personnel (ramped) was lost on this date. (en)
- World War II: The transport boat was captured by a Partizan boat and burned. (en)
- World War II: The supply ship was torpedoed and sun off Kristiansund, Norway by aircraft of Coastal Command, Royal Air Force. (en)
- World War II: Convoy ON 176: The cargo ship was torpedoed and sunk in the Atlantic Ocean north east of Newfoundland by with the loss of all 45 crew. (en)
- World War II: The submarine chaser was torpedoed and sunk in the Mediterranean Sea north north west of Isola di Femmine, Sicily, by . Four crewmen killed. Survivors rescued by and . (en)
- World War II: The cargo ship was torpedoed and sunk by in the Strait of Sicily west of Marsala, Italy . (en)
- World War II: Convoy HX 234: The Liberty ship straggled behind the convoy. She was torpedoed and sunk in the Atlantic Ocean by with the loss of all 62 crew. (en)
- World War II: The auxiliary minesweeper struck a mine and sank in the Bay of Biscay off Le Verdon-sur-Mer, Gironde, France. (en)
- The 9-gross register ton, fishing vessel foundered at Chatham in Southeast Alaska. (en)
- World War II: The transport was bombed and sunk at Kavieng, New Ireland by Boeing B-17 Flying Fortress aircraft of the United States Fifth Air Force. (en)
- World War II: The S-class submarine was depth charged and damaged in the Mediterranean Sea off Capo di Milazzo, Sicily, Italy by Luftwaffe Junkers Ju 88 aircraft, then attacked by , , and , . She was scuttled by her crew; all 48 were rescued and taken as prisoners of war, one died of wounds later. (en)
- World War II: The MAS 526-class torpedo boat was sunk at Trapani by Allied aircraft. (en)
- World War II: The buoy tender was strafed and sunk off Brest, France by Westland Whirlwind fighter-bomber aircraft of 263 Squadron, Royal Air Force with the loss of 3 of her 14 crew. (en)
- The fishing vessel departed IJmuiden for a fishing trip in the North Sea and vanished with her four crew. (en)
- World War II: The cargo ship struck a mine and sank off eastern Jutland, Denmark. (en)
- World War II: The was sunk west of Sicily by . There were 53 dead and 91 survivors. (en)
- World War II: The auxiliary cruiser was torpedoed and sunk in the Tyrrhenian Sea east of Cagliari by with the loss of 15 lives. (en)
- World War II: The fishing vessel was sunk off Harstad by grenades launched by the crew of . One crew was killed and another died of wounds. The submarine attacked others fishing vessels in the area, sinking none but killing eight of their crew and capturing ten, of which three died in captivity. (en)
- World War II: The cargo ship struck a mine and sank in the Atlantic Ocean off Casablanca, Morocco , with the loss of sixteen of her 55 crew. (en)
- World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean by . All 49 crew were rescued by . (en)
- World War II: The G-5-class motor torpedo boat was sunk by German aircraft in the Black Sea. There was one survivor. (en)
- World War II: The Type IXC/40 submarine was depth charged and sunk in the Atlantic Ocean south east of Cape Farewell by with the loss of all 55 crew. (en)
- World War II: Convoy ONS 2: The cargo ship straggled behind the convoy. She was torpedoed and sunk in the Atlantic Ocean by with the loss of eight of her 36 crew. Survivors were rescued by and . (en)
- thumb|U-175
World War II: The Type IXC submarine was depth charged and sunk in the Atlantic Ocean by with the loss of 13 of her 54 crew. The survivors were rescued by USCGC Spencer and and made prisoners of war. (en)
- World War II: The Vorpostenboot was torpedoed and sunk in the Seine Bay by and . (en)
- World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean by with the loss of four of her 23 crew. Survivors were rescued by . (en)
- World War II: The Type VIIC submarine was depth charged and sunk in the Atlantic Ocean off Cape Farewell, Greenland by Fairey Swordfish aircraft of 811 Squadron, Fleet Air Arm, based on and by and with the loss of ten of her 48 crew. (en)
- World War II: The Type IXC/40 submarine was depth charged and sunk in the Atlantic Ocean east of Cape Farewell, Greenland by a B-24 bomber of 120 Squadron, Royal Air Force with the loss of all 54 crew. (en)
- World War II: The cargo ship was torpedoed in the Mediterranean Sea off Cape Zebib, Tunisia, by and had to be run aground. She was later abandoned. (en)
- World War II: The minesweeper struck a mine and sank in the Black Sea off Constanța, Romania. (en)
- World War II: Convoy RU 71: The cargo ship straggled behind the convoy. She was torpedoed and sunk in the Atlantic Ocean by with the loss of 28 of her 30 crew. Survivors were rescued by . (en)
- World War II: The RD-class minesweeper was sunk at Trapani by Allied aircraft. Raised, repaired, and returned to service post war. (en)
- World War II: Convoy ON 176: The was torpedoed and sunk in the Atlantic Ocean (en)
- World War II: The cargo ship was torpedoed and sunk in the Pacific Ocean off the Jaluit Atoll, Marshall Islands by . (en)
- World War II: The was torpedoed and sunk in the Atlantic Ocean by with the loss of all 43 crew. (en)
- World War II: The blockade runner was shelled and sunk in the Atlantic Ocean by . The entire ship's company, including more than 100 personnel of the Kriegsmarine, were rescued by Adventure. (en)
- World War II: The S-class submarine was shelled and damaged in the Mediterranean Sea off Corsica, France by with the loss of 18 of her 45 crew. She was scuttled to prevent capture before the survivors were rescued and taken as prisoners of war. (en)
- World War II: The was bombed and sunk in Tulagi Harbour by Japanese aircraft with the loss of five of her 35 crew. (en)
- World War II: The VAS 201-class submarine chaser was sunk at Trapani by Allied aircraft. (en)
- World War II: The Type VIIC submarine was torpedoed and sunk in the Norwegian Sea west of Narvik, Norway by with the loss of all 45 crew. (en)
- World War II: The cargo ship which was carrying Allied prisoners was bombed and damaged in the Mediterranean Sea by American aircraft. She was then torpedoed and sunk by . (en)
- World War II: The Liberty ship was torpedoed and sunk in the Pacific Ocean off Port Stephens, New South Wales, Australia by . There were no casualties. (en)
- World War II: The tug struck a mine and sank in the North Sea off Drogden, Norway. (en)
- World War II: The was sunk at La Spezia by British aircraft of the Bomber Command. 48 crewmen were killed. (en)
- The was sunk in a collision off Benghazi, Libya, with . All the crew were rescued. (en)
- World War II: The tanker was torpedoed and sunk in the Tyrrhenian Sea east of Cagliari by with the loss of nine lives. (en)
- World War II: The cargo ship was torpedoed and sunk in the Tyrrhenian Sea off Elba by . (en)
- World War II: The tug was sunk by a mine off Cape Myskhako in the Black Sea. There were 8 killed and 13 survivors. (en)
- World War II: The was bombed and damaged in the Strait of Malacca off Penang, Malaya by Japanese aircraft. She was consequently scuttled by her crew the next day at . All 76 crew were taken as prisoners of war. (en)
- World War II: The cargo ship was torpedoed and sunk in the North Sea off Terschelling by Bristol Beaufighter aircraft of the Royal Air Force. All abord were saved. (en)
- World War II: The cargo ship was torpedoed and sunk in the Tsugaru Strait by with the loss of 27 lives. (en)
- World War II: The fleet supply ship was torpedoed and sunk south of Tori Shima by . One passenger was killed. (en)
- World War II: Convoy PW 323: The cargo ship was torpedoed and sunk in the English Channel off The Lizard, Cornwall by , and . (en)
- World War II: The was bombed and damaged in Tulagi Harbour, Solomon Islands by Japanese aircraft and was beached. She sank the next day with a loss of 19 crew. (en)
- World War II: Convoy TE 20: The trawler straggled behind the convoy due to engine trouble. She was torpedoed and sunk in the Mediterranean Sea by with the loss of 53 of her 54 crew. (en)
- World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean by . All 32 crew survived. (en)
- The yard patrol craft was sunk in the Ambrose Channel off Staten Island, New York in a collision with . (en)
- The landing craft support (mortar) was lost on this date. (en)
- World War II: The cargo ship was torpedoed and sunk in the Indian Ocean south of Mauritius by . Only one crew member survived, all other 85 people aboard were killed. (en)
- World War II: The cargo ship was torpedoed and sunk in the Mediterranean Sea off Nice by . 23 of the 38 men aboard were killed. (en)
- World War II: The cargo ship was torpedoed and sunk in the Indian Ocean south east of Durban, South Africa by . All 47 crew survived. The captain was taken on board U-182 as a prisoner of war. The rest of the crew were rescued by . (en)
- The yard patrol boat grounded and was wrecked in the Atlantic Ocean off Charleston, South Carolina. (en)
- World War II: Convoy UGS 6A: The Liberty ship, on her maiden voyage struck two mines in the Mediterranean Sea off Casablanca, Morocco and was damaged. She was abandoned by her 64 passengers and crew, who were rescued by and . She was later reboarded by seven of her crew and taken to Casablanca for temporary repairs. Later scuttled as a blockship at Utah Beach, France. (en)
- World War II: Operation Mardonius: The cargo ship was sunk at Oslo, Norway, by saboteurs led by Max Manus. (en)
- World War II: The Type VIIC submarine was depth charged and sunk in the Bay of Biscay north of Cape Finisterre, Spain by a Consolidated B-24 Liberator aircraft of 224 Squadron, Royal Air Force with the loss of all 45 crew. (en)
- World War II: The cargo ship was torpedoed and sunk in the Buton Passage, off south east Celebes south east of Wangiwangi Island by . Thirteen troops, one guard and two crewmen were killed. (en)
- The MFP-A landing craft was sunk on this date. (en)
- The MFP-C2 landing craft was sunk on this date. (en)
- The Siebel ferry was lost on this date. (en)
- World War II: The cargo liner was torpedoed and sunk in the Pacific Ocean by . (en)
- World War II: The cargo ship was torpedoed and sunk in the Strait of Malacca by . (en)
- World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean off Dakar, Senegal by with the loss of six crew. (en)
- World War II: The Siebel ferry was bombed and sunk in the Mediterranean Sea between Marsala and Tunisia. (en)
- World War II: The auxiliary guard boat was damaged in an exchange of fire with , then was torpedoed, blew up and sank with all 24 hands in the Pacific Ocean. (en)
- World War II: The Kaichū VI (Ro-33-class) submarine was depth charged and sunk in the Pacific Ocean off the Russell Islands by and with the loss of all 66 crew. (en)
- World War II: The tanker struck a mine and sank in the Thames Estuary with the loss of fifteen of her 55 crew. (en)
- World War II: The submarine chaser was shelled and sunk while escorting the blockade runner Butterfly off Les Sept-Îles north-east of Trégastel in the department of Côtes-d'Armor, Brittany, France . (en)
- World War II: The cargo ship was bombed and sunk off Cape Zebib, Tunisia by United States Army Air Force Boeing B-17 Flying Fortress aircraft. All 125 men aboard were saved. (en)
- World War II: The cargo ship was torpedoed and sunk north east of Sandy Cape, Queensland, Australia by . Her master, nineteen crewmen, and a gunner were killed. Eleven survivors were rescued by . (en)
- World War II: The Daifuku Maru No. 1-class transport was bombed and sunk near Kairiru Island by Boeing B-17 Flying Fortress aircraft of the United States Fifth Air Force. Three gunners and seven crew were killed. (en)
- World War II: The auxiliary minesweeper was torpedoed and sunk off Cape Carbonara, Sardinia by . (en)
- World War II: The cargo ship was torpedoed and sunk in the Pacific Ocean east of Australia by . (en)
- The was sunk in a collision with north of Buoy No. 20, north east of Blyth, Northumberland. (en)
- World War II: The was bombed and sunk at La Maddelena, Sardinia by Boeing B-17 Flying Fortress aircraft of the United States Twelfth Air Force. 77 crewmen and 2 civilians were killed. She was raised post-war and sold to Spain in 1951 for a proposed conversion to an aircraft carrier. This was not proceeded with and she was subsequently scrapped. (en)
- World War II: Convoy HX 231: The cargo ship romped ahead of the convoy. She was torpedoed and sunk in the Atlantic Ocean by with the loss of all 38 crew. (en)
- World War II: Convoy PW 323: The was torpedoed and sunk in the English Channel off Lizard Head, Cornwall by and . 25 crewmen killed. (en)
- World War II: The tug was attacked and set afire off Cape Vaticano by . (en)
- World War II: The MS 11-class MS boat was sunk at Trapani by Allied aircraft. (en)
- World War II: Convoy HX 232: The cargo ship was torpedoed and damaged in the Atlantic Ocean south east of Cape Farewell, Greenland by . She then straggled behind the convoy and was later torpedoed and sunk by . All 45 crew were rescued by . (en)
- World War II: The cargo ship was bombed and sunk off Stavanger, Norway by aircraft of Coastal Command. (en)
- World War II: The cargo ship was torpedoed and sunk in the North Sea off Terschelling, Friesland, Netherlands by Bristol Beaufighter aircraft of the Royal Air Force. (en)
- World War II: The tanker was torpedoed and sunk in the Indian Ocean east south east of Port Elizabeth, South Africa by with the loss of 50 of her 60 crew. Survivors were rescued by a South African Air Force rescue boat. (en)
- World War II: The was bombed and sunk by aircraft north-north-east of Cape Bon. (en)
- World War II: The transport ship was shelled and sunk in the Mediterranean Sea off the coast of Sicily by and . (en)
- World War II: Convoy ONS 3: The cargo ship straggled behind the convoy. She was torpedoed and damaged in the Atlantic Ocean south east of Cape Farewell, Greenland by with the loss of two of her 50 crew. Survivors were rescued by and . Wanstead was later torpedoed and sunk by . (en)
- World War II: The tanker was torpedoed and sunk in the Indian Ocean by . (en)
- World War II: The auxiliary patrol vessel was shelled and sunk off the Gulf of Orosei, Sardinia by . (en)
- World War II: The cargo ship ran aground at Ras Ahmer, west of Cape Bon, Tunisia, and was later abandoned. The whole crew survived. (en)
- World War II: The cargo ship was bombed and sunk in the North Sea off the Ryvingen Lighthouse, Norway, by Allied aircraft. (en)
- The MO-4-class patrol vessel was lost on this date. (en)
- World War II: The naval trawler was sunk at Trapani, Sicily by Allied aircraft. (en)
- The Vorpostenboot collided with and sank in the North Sea off Borkum. (en)
- The auxiliary patrol vessel was wrecked between Madras, India and Trincomallee, Ceylon while towing six barges. (en)
- World War II: The net tender was sunk by a mine in the Baltic Sea. (en)
- World War II: The CH-13-class submarine chaser was torpedoed and sunk in the Pacific Ocean east of Honshu by with the loss of all hands. (en)
- World War II: The cargo ship was bombed and sunk at Trapani by Allied aircraft. (en)
- The cargo-liner was wrecked in Lake Ladoga. No casualties. (en)
- World War II: Convoy HX 231: The cargo ship was torpedoed and damaged in the Atlantic Ocean by . She was then torpedoed and damaged further by with the loss of 19 of the 132 people aboard. Survivors were rescued by and , which scuttled the ship. (en)
- World War II: The cargo ship was torpedoed and sunk in the Mediterranean Sea off Cape Zebib, Tunisia, by . Only 26 of the 70 men aboard were saved. (en)
- World War II: The submarine struck a mine and sank in the Skagerrak west of Marstrand with the loss of all 33 crew. (en)
- World War II: Convoy HX 231: The tanker straggled behind the convoy. She was torpedoed and damaged in the Atlantic Ocean by . She was later torpedoed and sunk at by with the loss of all 69 crew. (en)
- World War II: The cargo ship was torpedoed and sunk north north west of Kavieng, New Ireland , by . Four crewmen were killed. (en)
- World War II: The MAS 552-class MAS boat was sunk in the Strait of Sicily by Allied aircraft with the loss of eight lives. (en)
- World War II: Convoy HX 234: The cargo liner straggled behind the convoy. She was torpedoed and sunk in the Atlantic Ocean by with the loss of 86 of the 130 people on board. Survivors were rescued by . (en)
- World War II: The cargo ship was bombed and sunk in the Mediterranean Sea by American aircraft. (en)
- World War II: Convoy TS 37: The cargo ship was torpedoed and sunk in the Atlantic Ocean south west of Freetown, Sierra Leone by with the loss of one of the 78 people on board. Survivors were rescued by . (en)
- World War II: The cargo ship struck a mine and sank off Bougainville Island, Solomon Islands. (en)
- World War II: The cargo ship was torpedoed and sunk by off Cape Nordkinn, Norway. (en)
- The unpowered covered lighter sank while under tow off Key West, Florida. (en)
- World War II: The icebreaking tug struck a mine and sank in Varangerfjord, Norway, with the loss of nine Norwegian crew. Another source says all 11 aboard were killed, possibly including 2 German. (en)
- World War II: The Type C2-S-B1 cargo ship was torpedoed and sunk in the Atlantic Ocean north east of Cape Hatteras, North Carolina by . All 95 people on board were rescued by . (en)
- World War II: The cargo ship was torpedoed and sunk in the White Sea off the Makkaur Lighthouse, Norway by Soviet aircraft. There were 11 dead and 40 survivors. (en)
- World War II: Convoy TS 37: The cargo ship was torpedoed and sunk in the Atlantic Ocean south west of Freetown by with the loss of two of her 113 crew. Survivors were rescued by . (en)
- World War II: The cargo ship was torpedoed and sunk in the Black Sea by . There were 28 dead and 70 survivors. (en)
- World War II: The Type VIIC submarine was depth charged and sunk in the Atlantic Ocean south east of Iceland by a Consolidated B-24 Liberator aircraft of 120 Squadron, Royal Air Force with the loss of all 47 crew. (en)
- World War II: The cargo ship was torpedoed and sunk in the Mediterranean Sea east north east of Cape Bengut, Algeria with the loss of ten of her 34 crew. (en)
- World War II: The was torpedoed and sunk while rescuing survivors of in the Buton Passage, off south east Celebes south east of Wangi-wangi Island, Netherlands East Indies by with the loss of seven of her 219 crew. (en)
- World War II: The MAS 552-class torpedo boat was sunk at Trapani by Allied aircraft. (en)
- World War II: The troopship was torpedoed and sunk in the Pacific Ocean by with the loss of 2,035 of the 2,500 people on board. (en)
- World War II: The cargo ship struck a mine and sank in the North Sea off Skagen, Denmark with the loss of a crew member. (en)
- World War II: The train ferry struck a mine off Copenhagen, Denmark and was beached on the Swedish coast. (en)
- World War II: The seiners were sunk in the Black Sea by German R boats and S boats. (en)
- World War II: The minelayer struck mines and sank in the Baltic Sea. (en)
- World War II: The sailing vessel was shelled and sunk off the Gulf of Orosei, Sardinia by . (en)
- World War II: The cargo ship was torpedoed and sunk in the Mediterranean Sea off the coast of Tunisia by . (en)
- World War II: The Type IXB submarine was shelled and sunk in the Atlantic Ocean west of Oporto, Portugal by and with the loss of all 53 crew. (en)
- World War II: The MAS motor torpedo boats were bombed and sunk at La Maddelena, Sardinia by Boeing B-17 Flying Fortress aircraft of the United States Twelfth Air Force. (en)
- World War II: The cargo ship was torpedoed and sunk in the Tyrrhenian Sea east of Cagliari, Sardinia, Italy by . (en)
- World War II: The transport ship struck a mine and sank in the Mediterranean Sea. (en)
- World War II: Convoy HX 232: The Liberty ship straggled behind the convoy. She was torpedoed and sunk in the Atlantic Ocean by with the loss of all 69 crew. (en)
- World War II: The Vorpostenboot was torpedoed and sunk in the North Sea off IJmuiden, North Holland, Netherlands by Bristol Beaufighter aircraft of the Royal Air Force. (en)
- World War II: The Siebel ferry was bombed and sunk in the Mediterranean Sea between Marsala and Tunis. (en)
- World War II: The was sunk in the Mediterranean Sea off Tunis by American aircraft. (en)
- World War II: The cargo ship was torpedoed and sunk in the Indian Ocean south of Mauritius by . (en)
- World War II: Battle of the Cigno Convoy: The was shelled and crippled in the Mediterranean Sea off Marettimo, Italy by and . She was scuttled by . Ten crew were lost. (en)
- World War II: Convoy ONS 3: The cargo ship was torpedoed and sunk in the Atlantic Ocean north east of St. John's, Newfoundland by with the loss of 16 of her 67 crew. Survivors were rescued by . (en)
- The landing craft gun, on voyage from Belfast to Falmouth, Cornwall, sank off Freshwater West, Pembrokeshire in a storm, with the loss of all on board . (en)
- World War II: The cargo ship was bombed and sunk off Rabaul, New Guinea by Consolidated B-24 Liberator aircraft of the United States Army Air Force. (en)
- World War II: The cargo ship was scuttled in the Indian Ocean when intercepted by . (en)
- World War II: The Type VIIC submarine was depth charged and sunk in the Atlantic Ocean north of the Faroe Islands by a Handley Page Hampden aircraft of 455 Squadron, Royal Australian Air Force. (en)
- World War II: The Type IXC submarine was depth charged and sunk in the Atlantic Ocean south of Newfoundland by Lockheed Ventura aircraft of the United States Navy with the loss of all 53 crew. (en)
- World War II: Convoy HX 232: The cargo ship was torpedoed and sunk in the Atlantic Ocean south east of Cape Farewell by . All 41 crew were rescued by . (en)
- The landing craft assault was lost sometime in April. (en)
- World War II: The naval trawler was torpedoed and sunk in the North Sea off Lowestoft, Suffolk, United Kingdom by an E-boat with the loss of 20 of her 31 crew. (en)
- The Siebel ferry foundered in a storm in the Mediterranean Sea between Sicily and Tunisia. (en)
- World War II: The MS 11-class MS boat was sunk west of Sicily by Allied aircraft. (en)
- World War II: The cargo ship was torpedoed and sunk in the Mediterranean Sea by . The whole crew was saved. (en)
- World War II: The blockade runner, on passage from Saint-Nazaire to Le Havre with a strong Kriegsmarine escort, was torpedoed, shelled and sunk by the s and accompanied by a group of motor torpedo boats off Les Sept-Îles north east of the Brittany village of Trégastel, Côtes-d'Armor. (en)
- World War II: The No. 1-class landing boat was lost on this date. (en)
- The fishing schooner collided with British steamer Fanad Head approximately southeast of Halifax, Nova Scotia. The ship was sliced in half and subsequently sunk, with the loss of 21 of her 28 crew. (en)
- The minesweeper ran aground at Odderøy, Norway and was wrecked. (en)
- World War II: The cargo ship was torpedoed and sunk in the Mediterranean Sea north of Bardia, Libya by with the loss of 16 of her 37 crew. (en)
- World War II: The cargo ship was torpedoed and sunk in the Pacific Ocean by with the loss of eight lives. (en)
- World War II: The cargo ship ran aground at Torre Finocchio, Sardinia while avoiding torpedoes fired . The same submarine destroyed the wreck with torpedoes the next day. The whole crew was saved. (en)
- World War II: The transport ship was sunk in the Mediterranean Sea by , and . (en)
- World War II: The cargo ship was bombed and sunk at Porto Torres, Sardinia by Royal Air Force aircraft. She was later refloated. (en)
- World War II: Battle of the Cigno Convoy: The was torpedoed and sunk in the Mediterranean Sea south-east of Marettimo Island by and . 103 crew were killed. (en)
- World War II: Convoy HX 231: The cargo ship romped ahead of the convoy. She was shelled in the Atlantic Ocean by and returned fire. The next day, she was torpedoed and sunk by with the loss of 26 of her 80 crew. (en)
- World War II: The cargo ship struck a mine and was heavily damaged in the Atlantic Ocean off Casablanca, Morocco , with the loss of 46 of her 71 crew. Later she was towed to Gibraltar, but was declared a constructive total loss. (en)
- World War II: The cargo liner was torpedoed and sunk in the Atlantic Ocean by with the loss of 115 of the 119 people on board. Survivors were rescued by a Consolidated PBY Catalina aircraft of the United States Navy. (en)
- World War II: The transport was damaged, probably by a mine, in the East China Sea and was abandoned. She eventually drifted ashore on Formosa and was later scrapped. (en)
- The cargo ship caught fire and sank in the Red Sea in the Straits of Perim . All the crew were saved. (en)
- World War II: Convoy Hansa 2B: The Shanghai Maru-class auxiliary transport was bombed in Hansa Bay, New Guinea by United States Fifth Air Force Boeing B-17 Flying Fortress and Consolidated B-24 Liberator aircraft. She was beached and abandoned. Nine crewman and three soldiers were killed. (en)
- World War II: The struck a mine and sank in the Strait of Otranto with the loss of all 63 crew. (en)
- World War II: The Type IXC/40 submarine struck a mine and sank in the Bay of Biscay off Lorient, Morbihan, France with the loss of 42 of her 54 crew. (en)
- World War II: Convoy TS 37: The cargo ship was torpedoed and sunk in the Atlantic Ocean south west of Freetown by with the loss of nine of her 48 crew. Survivors were rescued by . (en)
- World War II: The Type VIIC submarine was depth charged and sunk in the Atlantic Ocean by a Consolidated B-24 Liberator aircraft of 86 Squadron, Royal Air Force with the loss of all 48 crew. (en)
- thumb|right|El EsteroAfter loading ammunition, the cargo ship caught fire at the New York Port of Embarkation's Caven Point Terminal off Jersey City, New Jersey. To avoid a disastrous explosion, the ship was towed into an area of shallow water near Robbins Reef Light in Upper New York Bay, where the New York City Fire Department fireboats and deliberately sank her by pouring water into her holds. She was later raised and towed out of the harbor for use as a naval gunnery target. (en)
- World War II: The Fort ship was torpedoed and sunk in the Atlantic Ocean by and . (en)
- World War II: The cargo ship was bombed and sunk off Cape Zebib, Tunisia, by United States Army Air Force Boeing B-17 Flying Fortress aircraft. 45 crew members and 60 passengers were killed. There were 12 or 26 survivors, but one died of wounds. (en)
- The cargo ship caught fire at Malta and was scuttled. She was raised in 1945, towed out to sea and sunk. (en)
- World War II: Convoy HX 235: The cargo ship foundered in the Atlantic Ocean in a storm. She had previously been in collision with . (en)
- World War II: The Fairmile D motor torpedo boat was shelled and sunk off Pantellaria by . (en)
- World War II: The cargo ship struck a mine and sank in the Black Sea off Constanța, Romania. (en)
- World War II: The Type IXC/40 submarine was depth charged and damaged in the Atlantic Ocean off the Canary Islands, Spain by a Lockheed Hudson aircraft of 233 Squadron, Royal Air Force. She was scuttled the next day. All 52 crew survived. (en)
- World War II: The cargo ship was bombed and sunk in the North Sea off Den Helder, Netherlands by Bristol Beaufighter aircraft of the Royal Air Force with the loss of two of her crew. (en)
- World War II: Convoy HX 231: The cargo ship was torpedoed and damaged in the Atlantic Ocean south east of Cape Farewell, Greenland by . She was the torpedoed and sunk by with the loss of 71 of her 78 crew. Survivors were rescued by . (en)
- World War II: The freighter was torpedoed and sunk in the Pacific Ocean east south east of Smokey Cape, Australia by . Thirty-two crewmen were killed. Five survivors were rescued by trawler X.L.C.R. . (en)
- World War II: The defecting motorboat was shelled and sunk by and . (en)
- The yard patrol craft ran aground and sank on the Bahama Bank. (en)
- World War II: The cargo ship was torpedoed and sunk in the Pacific Ocean by . (en)
- World War II: The cargo ship struck a German mine and sank in Lyngefjord. There were 9 dead and 12 survivors. (en)
- World War II: Convoy UGS 7: The troopship was torpedoed and sunk in the Mediterranean Sea north of the Habibas Islands, Algeria by with the loss of 611 of the 1,131 people on board. Lifeboats from rescued many of the Senegalese soldiers on board. (en)
- World War II: The tug struck a mine and sank in the North Sea south of Drogden, Norway. (en)
- World War II: The cargo ship struck a mine and sank in the North Sea off Schiermonnikoog, Friesland, Netherlands. One man was killed. (en)
- World War II: Convoy OS 45: The cargo ship was torpedoed and sunk in the Atlantic Ocean west of Oporto by with the loss of six of her 64 crew. Survivors were rescued by and . (en)
- The yard patrol craft was sunk by an explosion in the Gulf of Mexico. (en)
- World War II: The Toyo Maru-class cargo ship was torpedoed and sunk in the Pacific Ocean west of Poluwat Island, Caroline Islands by . Fifty-one passengers and crew were killed; there was one survivor. (en)
- World War II: Convoy HX 231: The tanker was torpedoed and damaged in the Atlantic Ocean west of Ireland by . All 62 crew were rescued by and , the former of which scuttled the ship. (en)
- World War II: The cargo ship was torpedoed and sunk in the North Sea north east of Borkum, Germany, by Bristol Beaufighter aircraft of the Royal Air Force with the loss of two crew. (en)
- World War II: The cargo ship was torpedoed and sunk in the Mediterranean Sea by aircraft based on Malta. (en)
- World War II: The auxiliary minesweeper was sunk in the Mediterranean Sea by , and . (en)
- World War II: The was sunk at Catania by American aircraft. The whole crew survived. (en)
- World War II: Convoy OS 45: The cargo ship was torpedoed and sunk in the Atlantic Ocean west of Oporto, Portugal by with the loss of 82 of her 90 crew. Survivors were rescued by and . (en)
- World War II: The Vorpostenboot was torpedoed and sunk in the North Sea off Terschelling by Bristol Beaufighter aircraft of the Royal Air Force. (en)
- World War II: Convoy UGS 7: The Design 1013 cargo ship was torpedoed and sunk in the Mediterranean Sea west of Oran, Algeria by . All 61 people on board were rescued by and . (en)
- World War II: The was bombed and sunk in Ironbottom Sound by Japanese aircraft with the loss of 27 of her 208 crew. (en)
- World War II: Convoy 3202: The cargo ship was torpedoed and sunk in the Isla Verde Passage by . Lost with all 45 hands. (en)
- World War II: The submarine chaser was bombed and sunk in the Mediterranean Sea by American aircraft. (en)
- World War II: The cargo ship was torpedoed and heavily damaged in the Pacific Ocean by . Four crewmen were killed. She sank under tow two days later. (en)
- World War II: The minesweeper was torpedoed and sunk in the Mediterranean Sea by . (en)
- World War II: The auxiliary minesweeper struck a mine and sank in the English Channel off the Pas-de-Calais coast. (en)
- World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean south south west of Freetown, Sierra Leone by . All 53 crew were rescued by and . (en)
- World War II: Convoy GTMO 83: The Liberty ship was torpedoed and sunk in the Caribbean Sea off Great Inagua Island, Cuba by . All 57 crew were rescued by . (en)
- World War II: The Type VIIC submarine was depth charged and sunk in the Atlantic Ocean south of Iceland by a Boeing B-17 Flying Fortress aircraft of 206 Squadron, Royal Air Force with the loss of all 49 crew. (en)
- World War II: The Peacetime Standard Type D auxiliary gunboat was torpedoed and sunk in the Pacific Ocean off Honshu, Japan by with the loss of nine crewmen. (en)
- World War II: The ammunition transport was torpedoed and sunk north north west of Mussau Island, Bismarck Archipelago by . 35 crewmen killed. Survivors rescued by . (en)
- World War II: The cargo ship was wrecked on the north west coast of the United States. (en)
- World War II: The MO-4-class patrol vessel was sunk by a mine off Cape Myskhako in the Black Sea. (en)
- World War II: The Celebes Maru No. 1-class transport ran aground on a submerged reef in rough seas at night heading to the San Bernardino Strait. She was refloated and anchored east of the San Bernardino Strait off Luzon, Philippines. (en)
- World War II: The hospital ship was sunk by an American air raid against Naples, Tunisia. (en)
- World War II: The cargo ship was torpedoed and sunk in the Mediterranean Sea off Zembretta by and . There was no casualty. (en)
- The was heavily damaged in a collision off Benghazi, Libya, with . One crew member was lost. She reached Benghazi two days later but was not repaired. (en)
- World War II: The tugboat struck a mine and sank off Wrangel Island. (en)
- World War II: The cargo ship was torpedoed and sunk in the Mediterranean Sea by . (en)
- World War II: The minesweeper was sunk in the English Channel off St Helier, Jersey, Channel Islands by British aircraft. She was later refloated, repaired and returned to service. (en)
- World War II: Convoy HX 233: The cargo ship collided with in the Atlantic Ocean and was abandoned by her 62 crew, who were rescued by . Lena Luckenbach was boarded by a salvage party from and beached at Kames Bay. She was later repaired and returned to service. (en)
- thumb|P-39 Tade seen through the periscope of USS Seawolf
World War II: The was torpedoed and sunk in the East China Sea off Yonaguni Island by . (en)
- The landing craft infantry (large) was lost sometime in April. (en)
- The auxiliary submarine chaser was sunk on this date. (en)
- World War II: The coaster struck a mine and sank in the English Channel off the coast of Sussex, United Kingdom with the loss of eight of her nineteen crew. (en)
- World War II: Convoy HX 232: The cargo ship was torpedoed and sunk in the Atlantic Ocean south east of Cape Farewell by with the loss of 11 of the 67 people aboard. Survivors were rescued by . (en)
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