List of shipwrecks in March 1943

The list of shipwrecks in March 1943 includes ships sunk, foundered, grounded, or otherwise lost during March 1943.

1 March

 *  Eugenio ( undefined): World War II: The motor schooner was bombed and sunk at Naples by Royal Air Force aircraft. She was later raised, repaired and returned to service.
 * SS Fitz-John Porter (🇺🇸 United States): World War II: Convoy BT 6: The Liberty ship was torpedoed and sunk in the Atlantic Ocean (-12.33333°N, -37.01667°W) by GS U-518 with the loss of one of her 55 crew. Survivors were rescued by BRAZILIAN MINELAYER Carioca.
 * SS Tromøsund (🇳🇴 Norway): World War II: The cargo ship was bombed and sunk in the North Sea by Luftwaffe aircraft with the loss of all 42 people on board.

2 March

 * JAPANESE CARGO SHIP Kyokusei Maru : World War II: Battle of the Bismarck Sea: The cargo ship was bombed and sunk off New Guinea (-5.03333°N, 148.23333°W). by U.S. Army B-17s.
 * SS Meriwether Lewis (🇺🇸 United States): World War II: Convoy HX 227: The Liberty ship straggled behind the convoy. She was torpedoed and sunk in the Atlantic Ocean (61.16667°N, -28.41667°W) by GS U-634 with the loss of all 72 crew.
 * USS SC-1024 (SC-1024) : World War II: The submarine chaser was sunk in a collision off North Carolina.
 * SS Toen Maru ) : World War II: The Fleet Olier was torpedoed and sunk in the Makassar Strait (-3.48333°N, 117.28333°W) by USS Thresher (SS-200).

3 March

 * SS Aiyo Maru : World War II: Battle of the Bismarck Sea: The Transport was bombed and sunk by US and Australian aircraft south-east of Finschhafen, New Guinea (-6.93333°N, 148.26667°W).  45 crewmen and 278 troops were killed.
 * Arashio : World War II: Battle of the Bismarck Sea: The Asashio-class destroyer was bombed and sunk in the Bismarck Sea near Finschhafen, Papua New Guinea (-7.25°N, 148.5°W)  by Royal Australian Air Force and United States Army Air Forces aircraft. 176 survivors were rescued.
 * Doggerbank : World War II: The minelayer was torpedoed and sunk in the Atlantic Ocean (29.16667°N, -34.16667°W) by GS U-43 (1939) with the loss of 364 of her 365 crew. The survivor was rescued by SS Campoamor (🇪🇸 Spain).
 * SS Harvey W. Scott (🇺🇸 United States): World War II: Convoy DN 21: The Liberty ship was torpedoed and sunk in the Indian Ocean (-31.9°N, 30.61667°W) by GS U-160 (1941) (. Survivors were rescued by SS Ombu (🇦🇷 Argentina) or reached land in their lifeboats.
 * SS Kembu Maru : World War II: Battle of the Bismarck Sea:  The Transport was bombed and sunk by US and Autralian aircraft south-east of Finschhafen, New Guinea (-6.93333°N, 148.26667°W).  17 crewmen and 15 Gunners were killed.
 * SS Nirpura (🇬🇧 United Kingdom): World War II: Convoy DN 21: The cargo ship was torpedoed and sunk in the Indian Ocean 40 nmi south of Port St. Johns, South Africa (-32.78333°N, 30.8°W) with the loss of 38 of the 126 people on board. Survivors were rescued by R-8 (Ensign of the South African Air Force 1940-1951.svg South African Air Force).
 * SS Nojima : World War II: Battle of the Bismarck Sea:   The Transport was bombed and sunk by US and Autralian aircraft 31 miles east-south-east of Finschhafen, New Guinea (-7.25°N, 148.5°W).
 * SS Oigawa Maru : World War II: Battle of the Bismarck Sea:    The Transport was bombed and sunk by US and Autralian aircraft south-east of Finschhafen, New Guinea (-6.93333°N, 148.26667°W).  78 crewmen and 1151 troops were killed.
 * SS Shinai Maru : World War II: Battle of the Bismarck Sea:  The Transport was bombed and sunk by US and Autralian aircraft south-east of Finschhafen, New Guinea (-6.93333°N, 148.26667°W).  18 crewmen and 45 Gunners were killed.
 * Shirayuki : World War II: Battle of the Bismarck Sea: The Fubuki-class destroyer was bombed and sunk in the Bismarck Sea near Finschhafen, Papua New Guinea (-7.25°N, 148.5°W)  by Royal Australian Air Force and United States Army Air Forces aircraft. 32 crewmen killed.
 * SS Taiyo Maru : World War II: Battle of the Bismarck Sea:   The Transport was bombed and sunk by US and Autralian aircraft south-east of Finschhafen, New Guinea (-6.93333°N, 148.26667°W). Her Commanding Officer, 17 crewmen and 1880 troops were killed.

4 March

 * Asashio : World War II: Battle of the Bismarck Sea: The Asashio-class destroyer was bombed and damaged on the 3rd, Bombed and sunk in the Bismarck Sea near Finschhafen, Papua New Guinea (-7.25°N, 148.25°W) by Royal Australian Air Force and United States Army Air Forces aircraft on the 4th. Lost with all hands.).
 * MV California Star (1938) (🇬🇧 United Kingdom): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean 380 nmi north west of the Azores, Portugal (42.53333°N, -37.33333°W) by GS U-515 with the loss of 50 of her 74 crew. One survivor was taken on board U-515 as a prisoner of war.
 * SS City of Pretoria (🇬🇧 United Kingdom): World War II: The cargo ship was topedoed and sunk in the Atlantic Ocean north west of the Azores (41.75°N, -42.5°W) by GS U-172 with the loss of all 145 crew.
 * SS Empire Mahseer (🇬🇧 United Kingdom): World War II: Convoy DN 21: The cargo ship was torpedoed and sunk in the Indian Ocean (-32.01667°N, 30.8°W) by GS U-160 (1941) with the loss of eighteen of her 54 crew. Survivors were rescued by HMT Norwich City (FY229).
 * SS Marietta E (🇬🇧 United Kingdom): World War II: Convoy DN 21: The cargo ship was torpedoed and sunk in the Indian Ocean (-31.81667°N, 31.18333°W) by GS U-160 (1941) with the loss of five of her 45 crew. Survivors were rescued by R-8 (Ensign of the South African Air Force 1940-1951.svg South African Air Force).
 * SS Sheaf Crown (🇬🇧 United Kingdom): World War II: Convoy DN 21: The cargo ship was torpedoed and damaged in the Indian Ocean (-31.81667°N, 31.18333°W) by GS U-160 (1941) with the loss of one of her 48 crew. She was abandoned, but later towed to East London, South Africa. Later repaired and returned to service.
 * Tokitsukaze : World War II: Battle of the Bismarck Sea: The Kagero-class destroyer was bombed and damaged on the 3rd with 19 crewmen killed. Bombed and sunk in the Bismarck Sea near Finschhafen, Papua New Guinea (-7.25°N, 148.5°W) by Royal Australian Air Force and United States Army Air Forces aircraft on the 4th.
 * GS U-87 (1941) : World War II: The Type VIIB submarine was sunk in the Atlantic Ocean by HMCS Shediac (K110) and HMCS St. Croix (I81) (both ) with the loss of all 50 crew.

5 March

 * SS Empire Tower (🇬🇧 United Kingdom): World War II: Convoy XK 2: The cargo ship was torpeded and sunk in the Atlantic Ocean north west of Lisbon, Portugal (43.83333°N, -14.76667°W) by GS U-130 (1941) with the loss of 42 of her 45 crew. Survivors were rescued by HMT Loch Oskaig (FY175).
 * SS Executive (🇺🇸 United States): World War II: Convoy RA 53: The Design 1022 cargo ship was torpedoed and damaged in the Norwegian Sea (72.73333°N, 11.45°W) by GS U-255 with the loss of nine of her 62 crew. Survivors were rescued by HMT Northern Pride (FY105) and HMT St. Elstan (FY240) (both ). Executive was later scuttled by a Royal Navy destroyer.
 * SS Fidra (🇬🇧 United Kingdom): World War II: Convoy XK 2: The cargo ship was torpedoed and sunk in the Atlantic Ocean (43.83333°N, -14.76667°W) by GS U-130 (1941) with the loss of seventeen of her 29 crew. Survivors were rescued by HMS Coreopsis (K32).
 * SS Ger-y-Bryn (🇬🇧 United Kingdom): world War II: Convoy XK 2: The cargo ship was torpedoed and sunk in the Atlantic Ocean (43.83333°N, -14.76667°W) by GS U-130 (1941) . All 47 crew were rescued by HMS Coreopsis (K32).
 * USS Grampus (SS-207) : World War II: Battle of Blackett Strait: The Tambor-class submarine was shelled and sunk off Kolombangara, Solomon Islands by JAPANESE DESTROYER Minegumo and JAPANESE DESTROYER Murasame (both ).
 * JAPANESE DESTROYER Minegumo : World War II: Battle of Blackett Strait: The Asashio-class destroyer was shelled and sunk in the Pacific Ocean off Vila, Solomon Islands (-8.01667°N, 157.23333°W) by ships of Task Force 68, United States Navy, with the loss of 106 of her 230 crew.
 * JAPANESE DESTROYER Murasame : World War II: Battle of Blackett Strait: The Shiratsuyu-class destroyer was shelled and sunk in the Pacific Ocean off Vila, Solomon Islands (-8.05°N, 157.21667°W) by ships of Task Force 68, United States Navy, with the loss of 128 of her 181 crew.
 * SS Richard Bland (🇺🇸 United States): World War II: Convoy RA 53: The Liberty ship was torpedoed and damaged in the Atlantic Ocean north east of Iceland (72.73333°N, 11.45°W) by GS U-255 with the loss of 34 of her 69 crew. Survivors were rescued by HMS Impulsive (D11) or reached land in their lifeboat. Richard Bland was torpedoed on 10 March by U-255 and split in two. The stern section sank, the bow section was towed to Akureyri but was declared a total loss.
 * SS Thomas Hooker (🇺🇸 United States): Convoy ONS 168: The Liberty ship started to break in two in the Atlantic Ocean (53.33333°N, -47°W). All 62 crew were rescued by HMS Pimpernel (K71) . The drifting wreck was scuttled on 12 March by GS U-653.
 * SS Trefusis (🇬🇧 United Kingdom): World War II: Convoy XK 2: The cargo ship was torpedoed and sunk in the Atlantic Ocean (43.83333°N, -14.76667°W) by GS U-130 (1941) with the loss of three of her 47 crew. Survivors were rescued by HMS Coreopsis (K32).

6 March

 * SS Engøy (🇳🇴 Norway): World War II: The coaster struck a mine and sank at Sunnfjodleia.
 * SS Fort Battle River (🇬🇧 United Kingdom): World War II: Convoy KMS 10: The Fort ship was torpedoed and sunk in the Atlantic Ocean (36.55°N, -10.36667°W) by GS U-410 . All 65 people on board were rescued by SS Empire Flamingo (🇬🇧 United Kingdom) and HMCS Shediac (K110).
 * SS Kiriha Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Pacific Ocean by USS Triton (SS-201).
 * HMS ML251 (ML251) : World War II: The Motor Launch was sunk in a collision in the Atlantic Ocean.
 * MV Thorstrand (1938) (🇳🇴 Norway): World War II: The cargo ship ws torpedoed and sunk in the Atlantic Ocean (41.38333°N, -42.98333°W) by GS U-172 with the loss of four of the 47 people on board.

7 March

 * SS Egyptian (🇬🇧 United Kingdom): World War II: Convoy SC 121: The cargo ship was torpedoed and sunk in the Atlantic Ocean south east of Cape Farewell, Greenland (56.41667°N, -37.63333°W) by GS U-230 with the loss of 46 of her 49 crew. Survivors were rescued by HMCS Rosthern (K169).
 * SS Empire Impala (🇬🇧 United Kingdom): World War II: Convoy SC 121: The cargo ship straggled behind the convoy due to being ordered to rescue survivors from SS Egyptian (🇬🇧 United Kingdom). She was torpedoed and sunk in the Atlantic Ocean (approximately 57°N, -36°W) by GS U-591 with the loss of all 46 crew.
 * SS Empire Light (🇬🇧 United Kingdom): World War II: Convoy ON 168: The cargo ship straggled behind the convoy. She was torpedoed and damaged in the Atlantic Ocean by GS U-638 with the loss of 45 of her 50 crew. Survivors were rescued by HMS Beverley (H64) . Empire Light was torpedoed and sunk on 12 March (53.95°N, -46.23333°W) by GS U-468.
 * MV Jamaica (1936) (🇳🇴 Norway): World War II: The refrigerated cargo ship was torpedoed and sunk in the Atlantic Ocean (approximately 52°N, -27°W) by GS U-221 with the loss of 21 of her 38 crew. Some of the survivors were rescued by HMS Borage (K120)  whilst others reached land in their lifeboats.
 * SS Sabor (🇬🇧 United Kingdom): World War II: The cargo ship was torpedoed and sunk in the Indian Ocean south east of Mossel Bay, South Africa (-34.5°N, 23.16667°W) by GS U-506 with the loss of seven of her 58 crew. Survivors were rescued by R-7.
 * MV Tamesis (1939) (🇳🇴 Norway): The cargo ship was in collision with SS Alcoa Guard (🇺🇸 United States) in the Atlantic Ocean 200 nmi north east of Bermuda and sank. All 66 people on board were rescued by SS Richard H. Alvey (🇺🇸 United States).

8 March

 * SS Empire Lakeland (🇬🇧 United Kingdom): World War II: Convoy SC 121: The refrigerated cargo ship straggled behind the convoy. She was torpedoed and sunk in the Atlantic Ocean north west of Rockall, Inverness-shire (approximately 58°N, -15°W) by GS U-190 with the loss of all 62 crew.
 * SS Fort Lamy (🇬🇧 United Kingdom): World War II: Convoy SC 121: The cargo ship straggled behind the convoy. She was torpedoed and sunk in the Atlantic Ocean south east of Cape Farewell, Greenland (58.5°N, -31°W) by GS U-527 with the loss of 46 of her 51 crew. Survivors were rescued by HMS Vervain (K190).
 * SS Guido (🇬🇧 United Kingdom): World War II: Convoy SC 121: The cargo ship romped ahead of the convoy. She was torpedoed and sunk in the Atlantic Ocean 450 nmi south east of Cape Farewell (58.13333°N, -32.33333°W) by GS U-633 with the loss of ten of her 45 crew. Survivors were rescued by USCGC Spencer (WPG-36).
 * SS Hisashima Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Pacific Ocean off Honshu by USS Permit (SS-178).
 * SS James B. Stepphens (🇺🇸 United States): World War II: The Liberty ship was torpedoed and sunk in the Indian Ocean off Durban, South Africa (-28.58333°N, 33.3°W) by GS U-160 (1941) with the loss of one of her 63 crew. Survivors were rescued by HMS Nigeria (60), HMT Norwich City (FY229) (both ) and a South African Air Force rescue boat.
 * SS J. L. M. Curry (🇺🇸 United States): The Liberty ship broke in two and sank in the Atlantic Ocean off Iceland (66.88333°N, -14.28333°W).
 * HMS LCT-2480 : World War II: The Landing Craft, Tank was being carried as deck cargo on board SS Fort Lamy (🇬🇧 United Kingdom) and was lost when that ship was torpedoed and sunk by GS U-527.
 * SS Leadgate (🇬🇧 United Kingdom): World War II: convoy SC 121: The cargo ship straggled behind the convoy. She was torpedoed and sunk in the Atlantic Ocean 450 nmi west of Rockall, Inverness-shire (57.65°N, -27.6°W) by GS U-642 with the loss of all 30 crew.
 * SS 's Jacob (1907) (🇳🇱 Netherlands): World War II: Operation Lilliput: The cargo ship was bombed and sunk in the Pacific Ocean off Porlock Bay, Papua New Guinea with the loss of five of her 163 crew.
 * GS U-156 (1941) : World War II: The Type IXC submarine was depth charged and sunk in the Atlantic Ocean east of Barbados (12.63333°N, -54.65°W) by a Consolidated PBY Catalina aircraft of the United States Navy with the loss of all 53 crew.
 * SS Vojvoda Putnik ( undefined): World War II: Convoy SC 121: The cargo ship straggled behind the convoy due to problems with her steering gear. She was torpedoed and sunk in the Atlantic Ocean (58.7°N, -31.41667°W) by GS U-591 with the loss of all 44 crew.

9 March

 * MV Bonneville (1929) (🇳🇴 Norway): World War II: Convoy SC 121: The cargo ship was torpedoed and sunk in the Atlantic Ocean (58.8°N, -22°W) by GS U-229 and/or GS U-405 (both ) with the loss of 37 of her 44 crew. Survivors were rescued by USCGC Bibb (WPG-31) and SS Melrose Abbey (🇬🇧 United Kingdom).
 * SS Drachenfels (1921) (🇩🇪 Germany): World War II: The cargo ship was scuttled at Mormugão, Portuguese India. Scrapped at Goa, Portuguese India, in 1948.
 * MV Ehrenfels (🇩🇪 Germany): World War II: The cargo ship was scuttled at Mormugão, Portuguese India to prevent seizure by Portuguese authorities.
 * SS Empire Standard (🇬🇧 United Kingdom): World War II: The cargo ship was torpedoed and damaged in the Mediterranean Sea off Algiers, Algeria. She was placed under repair at Algiers but torpedoed and damaged on 26 March by Luftwaffe aircraft. Her back was broken and she was declared a constructive total loss. Empire Standard was towed out to sea and scuttled.
 * SS James K. Polk (🇺🇸 United States): World War II: Convoy BT 6: The Liberty ship was torpedoed and damaged in the Caribbean Sea 175 nmi off Cayenne French Guiana (7.66667°N, -52.11667°W) by GS U-510 with the loss of one of her 65 crew. All but eight crew were taken off by USS PC-592 . James K. Polk was towed to Trinidad by a British tug. She was towed to Mobile, Alabama, United States in March 1945 and declared a constructive total loss.
 * SS James Smith (🇺🇸 United States): World War II: Convoy BT 6: The Liberty ship was torpedoed and damaged in the Atlantic Ocean 175 nmi north of Cayenne (7.66667°N, -52.11667°W) by GS U-510 with the loss of eleven of her 58 crew. Survivors abandoned ship, although some of them reboarded her the next day. The other survivors were rescued by USS PC-592 . Those on board James Smith were ordered to abandon her on 12 March, but she did not sink and was again reboarded. She was towed to Trinidad by HMS Zwarte Zee (W163) . Subsequently repaired and returned to service.
 * MV Kelvinbank (🇬🇧 United Kingdom): World War II: Convoy BT 6: The cargo ship was torpedoed and sunk in the Atlantic Ocean 200 nmi north of Paramaribo, Surinam (7.4°N, -52.18333°W) by GS U-510 with the loss of 28 of her 60 crew. Survivors were rescued by SS George G. Meade (🇺🇸 United States).
 * HMS LCT-2341 : World War II: Convoy SC 121: The Landing Craft, Tank was being transported as deck cargo on board MV Bonneville (🇳🇴 Norway) and was lost when that ship was torpedoed and sunk by a Kriegsmarine U-boat.
 * SS Malantic (🇬🇧 United Kingdom): World War II: Convoy SC 121: The cargo ship was torpedoed and sunk in the Atlantic Ocean (58.61667°N, -22.53333°W) by GS U-409 with the loss of 27 of her 45 crew. Survivors were rescued by SS Melrose Abbey (🇬🇧 United Kingdom).
 * SS Milos (1898) (🇸🇪 Sweden): World War II: Convoy SC 121: The cargo ship straggled behind the convoy. She was torpedoed and sunk in the Atlantic Ocean (approximately 58°N, -24°W) by GS U-530 with the loss of all 30 crew.
 * SS Puerto Rican (🇺🇸 United States): World War II: Convoy RA 53: The cargo ship straggled behind the convoy. She was torpedoed and sunk in the Norwegian Sea north east of Iceland (66.73333°N, -10.68333°W) by GS U-586 with the loss of 64 of her 65 crew. The survivor was rescued by HMT St. Elstan (FY240).
 * MV Rosewood (🇬🇧 United Kingdom): World War II: Convoy SC 121: The tanker was torpedoed and damaged in the Atlantic Ocean south of Iceland (58.61667°N, -22.53333°W) by GS U-409 with the loss of all 42 crew. The burning wreck broke in two. Both section were scuttled on 11 March at 58.5°N, -20.51667°W by USCGC Bibb (WPG-31).
 * MV Tabor (1936) (🇳🇴 Norway): World War II: The cargo ship was torpedoed, shelled and sunk in the Indian Ocean (-38.5°N, 23.16667°W) by GS U-506 with the loss of twelve of her 46 crew.
 * SS Thomas Ruffin (🇺🇸 United States): World War II: Convoy BT 6: The Liberty ship was torpedoed and damaged in the Atlantic Ocean 175 nmi north of Cayenne (7.66667°N, -52.11667°W) by GS U-510 with the loss of six of her 58 crew. Survivors abandoned ship and were rescued by USS Courage (PG-70) and USS PC-592 (both ). Thomas Ruffin towed to Port of Spain, Trinidad by HMS Milford (U51) . She was later towed to Mobile where she was declared a constructive total loss.

10 March

 * SS Andrea F. Luckenbach (🇺🇸 United States): World War II: Convoy HX 228: The cargo ship was torpedoed and sunk in the Atlantic Ocean (51.33333°N, -29.48333°W) by GS U-221 with the loss of twenty of the 84 people on board. Survivors were rescued by RFA Orangeleaf.
 * SS Coulmore (🇬🇧 United Kingdom): World War II: Convoy SC 121: The cargo ship was torpedoed and damaged in the Atlantic Ocean (58.8°N, -22°W) by GS U-229 with the loss of 25 of her 43 crew. Survivors abandoned ship and were rescued by USCGC Bibb (WPG-31)  and HMCS Dauphin (K157) . USCGC Bibb took Coulmore in tow, reaching the Clyde on 23 March. She was subsequently repaired and returned to service in July 1943.
 * SS James Sprunt (🇺🇸 United States): World War II: Convoy KG 123: The Liberty ship was torpedoed and sunk in the Caribbean Sea off Guantanamo Bay, Cuba (19.81667°N, -74.63333°W) by GS U-185 with the loss of all 69 crew.
 * MGB 622 : World War II: The Motor Gun Boat was shelled and sunk off Tershelling, Netherlands by German warships.
 * SS Nailsea Court (🇬🇧 United Kingdom): World War II: Convoy SC 121: The cargo ship was torpedoed and sunk in the Atlantic Ocean south of Reykjavík, Iceland (58.75°N, -21.95°W) by GS U-229 with the loss of 45 of her 49 crew. Survivors were rescued by HMCS Dauphin (K157)  and SS Melrose Abbey (🇬🇧 United Kingdom).
 * SS Richard D. Spaight (🇺🇸 United States): World War II: The Liberty ship was torpedoed, shelled and sunk in the Mozambique Channel 350 nmi north east of Durban, South Africa (-28°N, 37°W) by GS U-182 with the loss of one of her 67 crew.
 * SS Tucurina (🇬🇧 United Kingdom): World War II: Convoy HX 228: The cargo ship was torpedoed and sunk in the Atlantic Ocean south east of Cape Farewell, Greenland (51°N, -30.16667°W) by GS U-211 with the loss of one of the 81 people on board. Survivors were rescued by FRENCH CORVETTE Roselys.
 * GS U-633 : World War II: The Type VIIC submarine was rammed and sunk in the Atlantic Ocean (58.25°N, -19.91667°W) by SS Scorton (🇬🇧 United Kingdom) with the loss of all 43 crew.
 * SS Virginia Sinclair (🇺🇸 United States): World War II: Convoy KG 123: The tanker was torpedoed and sunk in the Caribbean Sea off Cape Maysi, Cuba (20.18333°N, -74.06667°W) by GS U-185 ( with the loss of seven of her 44 crew. Survivors were rescued by USS SC-742.

11 March

 * SS Aelybryn (🇬🇧 United Kingdom): World War II: The cargo ship was torpedoed and sunk in the Indian Ocean south east of Cape Farewell, South Africa (-29.13333°N, 34.08333°W) by GS U-160 (1941) with the loss of nine of her 41 crew. Survivors were rescued by SS Lourenço Marques (🇵🇹 Portugal).
 * SS Baron Kinnaird (🇬🇧 United Kingdom): World War II: Convoy ONS 169: The cargo ship straggled behind the convoy. She was torpedoed and sunk in the Atlantic Ocean north west of Belle Isle, Newfoundland (approximately 53°N, -40°W) by GS U-622 with the loss of all 42 crew.
 * SS Brant County (1915) (🇳🇴 Norway): World War II: Convoy HX 228: The cargo ship was torpedoed and sunk in the Atlantic Ocean (52.08333°N, -27.58333°W) by GS U-86 (1941) with the loss of 36 of the 58 people on board. Survivors were rescued by SS Stuart Prince (🇬🇧 United Kingdom).
 * SS Empire Lakeland (🇬🇧 United Kingdom): World War II: Convoy SC 121: The cargo ship was torpedoed and sunk in the Atlantic Ocean by GS U-190.
 * HMS Harvester (H19) (: World War II: Convoy HX 228: The H-class destroyer was torpedoed and sunk in the Atlantic Ocean by GS U-444 with the loss of 145 crew.
 * SS Karin : World War II: The blockade runner was intercepted in the Atlantic Ocean by USS Eberle (DD-430) and USS Savannah (CL-42). A boarding party from USS Eberle was placed on the ship, which was sunk by explosives killing eleven crew from USS Eberle. The remaining three members of the boarding party and 72 crew were rescued by USS Savannah.
 * HMS LCT-2398 : World War II: Convoy HX 228: The Landing Craft, Tank was being transported as deck cargo on board SS William C. Gorgas (🇺🇸 United States) and was lost when that ship was torpedoed and sunk by GS U-767.
 * GERMAN MINESWEEPER M-4620 : World War II: The minesweeper was torpedoed and sunk by a Norwegian motor torpedo boat off Askvoll, Norway.
 * SS Olancho (🇭🇳 Honduras): World War II: The cargo ship was torpedoed and sunk in the Gulf of Mexico 30 nmi west of Cape San Antonio, Cuba (22.13333°N, -85.23333°W) by GS U-183 with the loss of three of her 46 crew. Survivors were rescued by USS Absecon (AVP-23) and SS Choluteca (🇭🇳 Honduras).
 * GS U-432 : World War II: The Type VIIC submarine was depth charged, rammed and sunk by in the Atlantic Ocean (51.58333°N, -28.33333°W) FRENCH CORVETTE Aconit with the loss of 26 of her 46 crew.
 * GS U-444 : World War II: The Type VIIC submarine was depth charged, rammed and sunk in the Atlantic Ocean (51.23333°N, -29.3°W) by FRENCH CORVETTE Aconit and HMS Harvester (H19)  with the loss of 41 of her 45 crew.
 * SS William C Gorgas (🇺🇸 United States): World War II: Convoy HX 228: The Liberty ship was torpedoed and sunk in the Atlantic Ocean (51.58333°N, -28.5°W) by GS U-767 with the loss of 22 of her 73 crew. Survivors were rescued by HMS Harvester (H19), but only twelve of the survived the sinking of that ship.

12 March

 * HMS Lightning (G55) : World War II: The L-class destroyer was torpedoed and sunk in the Mediterranean Sea off Algeria by S-55 and S-158 (both ).
 * SS Taihosan Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Pacific Ocean by USS Plunger (SS-179).
 * HMS Turbulent (N98) : World War II: The T-class submarine struck a mine and sank in the Mediterranean Sea off La Maddelena, Sardinia, Italy with the loss of all 61 crew.
 * GS U-130 (1941) : World War II: The Type IX submarine was depth charged and sunk in the Atlantic Ocean (37.16667°N, -20.35°W) by USS Champlin (DD-601) with the loss of all 53 crew.

13 March

 * SS Ceres (1919) (🇳🇱 Netherlands): World War II: Convoy GAT 49: The cargo ship was torpeoded and sunk in the Caribbean Sea (14.83333°N, -71.76667°W) by GS U-68 (1940) with the loss of two of her 37 crew. Survivors were rescued by one of the escort vessels.
 * SS Cities Service Missouri (🇺🇸 United States): World War II: The cargo ship was torpedoed and sunk in the Caribbean Sea (14.83333°N, -71.76667°W) by GS U-68 (1940) with the loss of two of her 54 crew. Survivors were rescued by USS Biddle (DD-151).
 * SS Clan Alpine (1918) (🇬🇧 United Kingdom): World War II: Convoy OS 44: The cargo ship was torpedoed and damaged in the Atlantic Ocean 190 nmi west of Cape Finisterre, Spain (42.75°N, -13.51667°W) by GS U-107 (1940) with the loss of 28 of her 94 crew. Survivors were rescued by HMS Scarborough (L25), which scuttled Clan Alpine.
 * RMS Empress of Canada (1922) (🇬🇧 United Kingdom: The troopship was torpedoed and sunk in the Atlantic Ocean 400 nmi south of Cape Palmas, Liberia by ITALIAN SUBMARINE Leonardo da Vinci with the loss of 392 lives.
 * SS Keystone (🇺🇸 United States): World War II: Convoy UGS 6: The Design 1013 cargo ship straggled behind the convoy. She was torpedoed and sunk in the Atlantic Ocean 450 nmi west of the Azores, Portugal (37.98333°N, -37.66667°W) by GS U-172  with the loss of two of her 72 crew. Survivors were rescued by SS Sines (🇵🇹 Portugal).
 * SS Kosei Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the East China Sea by USS Sunfish (SS-281).
 * SS Marcella (1928) (🇬🇧 United Kingdom): World War II: Convoy OS 44: The cargo ship was torpedoed and sunk in the Atlantic Ocean 190 nmi west of Cape Finisterre (42.75°N, -13.51667°W by GS U-107 (1940) with the loss of all 44 crew.
 * SS Ocean Freedom (🇬🇧 United Kingdom): World War II: The Ocean ship was bombed and sunk at Murmansk by Luftwaffe aircraft. She was refloated on 1 June and beached, but was subsequently scrapped.
 * SS Oporto (🇬🇧 United Kingdom: World War II: Convoy OS 44: The cargo ship was torpedoed and sunk in the Atlantic Ocean 190 nmi west of Cape Finisterre (42.75°N, -13.51667°W by GS U-107 (1940) with the loss of 43 of her 47 crew. Survivors were rescued by HMS Spiraea (K08).
 * SS Sembilangan (🇳🇱 Netherlands): World War II: Convoy OS 44: The cargo ship was torpedoed and sunk in the Atlantic Ocean 190 nmi west of Cape Finisterre (42.75°N, -13.51667°W by GS U-107 (1940)  with the loss of 86 of her 87 crew. The survivor was rescued by HMS Spiraea (K08)
 * GS U-163 (1941) : World War II: The Type IXC submarine was depth charged and sunk in the Atlantic Ocean north west of Cape Finisterre (45.08333°N, -15°W) by HMCS Prescott (K161) with the loss of all 57 crew.

14 March

 * SS Caraibe (1932) (🇫🇷 France): World War II: The cargo ship was bombed and sunk by aircraft north-west of Marettimo, Italy (38.03333°N, 11.9°W).
 * HMT Moravia : World War II: The naval trawler struck a mine and sank in the North Sea.
 * SS Optima (1925) (🇩🇪 Germany): World War II: The cargo ship was bombed and sunk by aircraft off Florø, Norway.
 * HNOMS MTB 631 (MTB 631) : World War II: Convoy FS 1753: The Motor Torpedo Boat was wrecked at Floro, salvaged by the Germans.
 * HMS Thunderbolt (N25) : World War II: The T-class submarine was depth charged and sunk in the Mediterranean Sea off Sicily, Italy by ITALIAN CORVETTE Cicogna with the loss of all 62 crew.

15 March

 * SS Momoha Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Pacific Ocean (-0.03333°N, 145.08333°W) by USS Trigger (SS-237).
 * SS Ocean Seaman (🇬🇧 United Kingdom): World War II: The Ocean ship was torpedoed and damaged in the Mediterranean Sea (36.91667°N, 1.98333°W) by GS U-380 . She was beached at Algiers, Algeria but was declared a total loss.
 * Snurp II (🇳🇴 Norway): World War II: The fishing vessel sank in Skorafjorden due to overloading.
 * USS Triton (SS-201) : World War II: The Tambor-class submarine was shelled and sunk in the Pacific Ocean off Kairiru Island, New Guinea -3.33611°N, 143.55°W by Akikaze and two other destroyers (all ) with the loss of all 60 crew.
 * GS U-653 : World War II: The Type VIIC submarine was depth charged and sunk in the Atlantic Ocean (53.76667°N, -24.58333°W) by HMS Starling (U66), HMS Wild Goose (U45) and a Fairey Swordfish aircraft based on HMS Vindex (D15) (all ) with the loss of all 51 crew.
 * SS Wyoming (1930) (🇫🇷 France): World War II: Convoy UGS 6: The cargo ship was torpedoed and sunk in the Atlantic Ocean (40.3°N, -28.93333°W) by GS U-524 . All 127 people on board were rescued by USS Champlin (DD-601).

16 March

 * SS Benjamin Harrison (🇺🇸 United States): World War II: Convoy UGS 6: The Liberty ship was torpedoed and damaged in the Atlantic Ocean (39.03333°N, -24.25°W) by GS U-172 with the loss of three of her 72 crew. Survivors were rescued by MV Alan-a-Dale (🇵🇦 Panama and USS Rowan (DD-405), which scuttled the ship.
 * HMT Campobello (T278) : World War II: The Trawler developed severe leaks and was scuttled by Corvette HMS Godetia (K226).
 * MV Elin K (🇳🇴 Norway): World War II: Convoy HX 229: The cargo ship was torpedoed and sunk in the Atlantic Ocean (50.63333°N, -34.76667°W) by GS U-603 . All 40 crew were rescued by HMS Pennywort (K111).
 * SS Hadleigh (🇬🇧 United Kingdom): World War II: Convoy ET 14: The cargo ship was torpedoed and damaged in the Mediterranean Sea north west of Oran, Algeria (36.16667°N, -0.5°W) by GS U-77 (1940) with the loss of two of her 52 crew. Survivors were rescued by HMS Tynedale (L96) . Hadleigh was taken in tow by the tug HMS Restive (W39)  and beached at Mers El Kébir, Algeria. She later broke in two and was declared a total loss.
 * HMS Horsa (W97) : World War II: The Rescue Tug ran aground near Osfles Rock, Ireland and was wrecked.
 * SS Johannisberger (1940) (🇩🇪 Germany): World War II: The cargo ship was torpedoed by the submarine M-122 and beached off Kirkenes, Norway.
 * MV Merchant Prince (🇬🇧 United Kingdom): World War II: Convoy ET 14: The cargo ship was torpedoed and damaged in the Mediterranean Sea north west of Oran (36.16667°N, -0.5°W) with the loss of one of her 51 crew. She was abandoned, but reboarded the next day and beached at Oran. Later repaired and returned to service.

17 March

 * SS Alderamin (🇳🇱 Netherlands): World War II: Convoy SC 122: The cargo ship was torpedoed and damaged in the Atlantic Ocean (52.23333°N, -32.25°W) by GS U-338 with the loss of fifteen of her 64 crew. She later sank at 51.5°N, -34.91667°W.
 * SS Coracero (🇬🇧 United Kingdom): World War II: Convoy HX 229: The refrigerated cargo ship was torpedoed and sunk in the Atlantic Ocean (51.06667°N, -33.33333°W) by GS U-384 with the loss of five of the 58 people on board. Survivors were rescued by HMS Mansfield (G76).
 * SS Fort Cedar Lake (🇬🇧 United Kingdom): World War II: Convoy SC 122: The Fort ship, on her maiden voyage, straggled behind the convoy. She was torpedoed and damaged in the Atlantic Ocean south east of Cape Farewell, Greenland (52.23333°N, -32.25°W) by GS U-338 . She was later torpedoed and sunk by GS U-665 . All 50 crew were rescued by SS Zamalek (🇬🇧 United Kingdom).
 * SS Granville (🇵🇦 Panama): World War II: Convoy SC 122: The cargo ship was torpedoed and sunk in the Atlantic Ocean (52.83333°N, -30.58333°W) by GS U-338 with the loss of thirteen of her 47 crew. Survivors were rescued by HMS Lavender (K60).
 * SS Harry Luckenbach (🇺🇸 United States): World War II: Convoy HX 229: The cargo ship was torpedoed and sunk in the Atlantic Ocean (50.63333°N, -34.76667°W) by GS U-91 (1941) with the loss of all 80 crew.
 * SS Irénée Du Pont (🇺🇸 United States): World War II: Convoy HX 229: The Type C2 cargo ship straggled behind the convoy. She was torpedoed and sunk in the Atlantic Ocean (50.63333°N, -34.76667°W) by GS U-91 (1941) with the loss of fourteen of the 84 people on board. Survivors were rescued by HMS Mansfield (G76)  and SS Teoka (🇬🇧 United Kingdom).
 * SS James Oglethorpe (🇺🇸 United States): World War II: Convoy HX 229: The Liberty ship was torpedoed and damaged in the Atlantic Ocean (50.63333°N, -34.76667°W) by GS U-758 . Some of those on board abandoned ship and were either drowned or rescued by HMS Pennywort (K111) . An attempt was made to sail James Oglethorpe to St. John's, Newfoundland but she either foundered or was sunk by a coup de grâce from GS U-91 (1941) (. A total of 44 of the 74 people on board were lost.
 * SS King Gruffydd (🇬🇧 United Kingdom): World War II: Convoy SC 122: The cargo ship was torpedoed and sunk in the Atlantic Ocean south east of Cape Farewell (51.91667°N, -32.68333°W) by GS U-338 with the loss of 24 of her 49 crew. Survivors were rescued by SS Zamalek (🇬🇧 United Kingdom).
 * SS Kingsbury (🇬🇧 United Kingdom): World War II: Convoy SC 122: The cargo ship was torpedoed and sunk in the Atlantic Ocean (51.91667°N, -32.68333°W) by GS U-338 with the loss of four of her 48 crew. Survivors were rescued by SS Zamalek (🇬🇧 United Kingdom).
 * SS Molly Pitcher (🇺🇸 United States): World War II: Convoy UGS 6: The Liberty ship, on her maiden voyage, straggled behind the convoy. She was torpedoed and damaged in the Atlantic Ocean 500 nmi west of Lisbon, Portugal (38.38333°N, -19.9°W) by GS U-167 (1942)  with the loss of four of her 70 crew. Survivors were rescued by USS Champlin (DD-601), USS Rowan (DD-405) (both ) and SS William Johnson (🇺🇸 USA). Molly Pitcher was later sunk by GS U-521 (.
 * SS Nariva (🇬🇧 United Kingdom): World War II: Convoy HX 229: The cargo ship straggled behind the convoy. She was torpedoed and damaged in the Atlantic Ocean (50.56667°N, -35.03333°W) by GS U-600 and GS U-91 (1941) (both ). All 94 crew were rescued by HMS Anenome (K48) and HMS Mansfield (G76) (both ) before the former scuttled Nariva.
 * SS Port Auckland (🇬🇧 United Kingdom): World War II: Convoy SC 122: The cargo ship was torpedoed and sunk in the Atlantic Ocean (52.41667°N, -30.25°W) by GS U-305 with the loss of eight of the 118 people on board. Survivors were rescued by HMS Godetia (K226).
 * USS PT-67 (PT-67) : World War II: The ELCO 77' -class PT Boat was burned in a refueling accident at Tufi, New Guinea (-9.03333°N, 149.33333°W).
 * USS PT-119 (PT-119) : World War II: The ELCO 80' -class PT Boat was burned in a refueling accident at Tufi, New Guinea (-9.03333°N, 149.33333°W).
 * Southern Princess (🇬🇧 United Kingdom): World War II: Convoy HX 229: The whaling factory ship was torpedoed and sunk in the Atlantic Ocean (50.6°N, -34.5°W) by GS U-600 with the loss of six of her 199 crew. Survivors were rescued by SS Tekoa (🇬🇧 United Kingdom).
 * SS Terkoelei (🇳🇱 Netherlands): World War II: Convoy HX 229: The cargo ship was torpedoed and sunk in the Atlantic Ocean (51.75°N, -31.25°W) by GS U-631 with the loss of 36 of her 97 crew. Survivors were rescued by HMS Mansfield (G76).
 * SS William Eustis (🇺🇸 United States): World War II: Convoy HX 229: The Liberty ship was torpedoed and damaged in the Atlantic Ocean (50.16667°N, -35.03333°W) by GS U-435 . All 72 crew were rescued by HMS Volunteer (D71), which scuttled the ship.
 * SS Zaanland (🇳🇱 Netherlands): World War II: Convoy HX 229: The cargo ship was torpedoed and sunk in the Atlantic Ocean (50.63333°N, -34.76667°W) by GS U-758 . All 53 crew were rescued by the convoy's escorts.
 * SS Zouave (🇬🇧 United Kingdom): World War II: Convoy SC 122: The cargo ship was torpedoed and sunk in the Atlantic Ocean (52.41667°N, -30.25°W) by GS U-305 with the loss of thirteen of her 43 crew. Survivors were rescued by HMS Godetia (K226).

18 March

 * MV Canadian Star (🇬🇧 United Kingdom): World War II: Convoy HX 229: The cargo ship was torpedoed and sunk in the Atlantic Ocean south east of Cape Farewell, Greenland (53.4°N, -28.56667°W) by GS U-221 with the loss of 34 of the 84 people on board. Survivors were rescued by HMS Anenome (K48) and HMS Pennywort (K111) (both ).
 * SS Clarissa Radcliffe (🇬🇧 United Kingdom): World War II: Convoy SC 122: The cargo ship straggled behind the convoy. She was torpedoed and sunk in the Atlantic Ocean 700 nmi west of Cape Farewell (52.35°N, -27.25°W) by GS U-663 with the loss of all 55 crew.
 * SS Dafila (🇬🇧 United Kingdom): World War II: The cargo ship was torpedoed and sunk in the Mediterranean Sea off Derna, Libya (32.98333°N, 22.35°W) by GS U-593 with the loss of 22 of her 37 crew. Survivors were rescued by HMSAS Southern Maid.
 * SS Kaying (🇬🇧 United Kingdom): World War II: The cargo ship was torpedoed and sunk in the Mediterranean Sea off Derna (32.98333°N, 22.35°W by GS U-593 with the loss of nine of her 81 crew.
 * SS Molly Pitcher (🇺🇸 United States): World War II: Convoy UGS 6: The Liberty ship straggled behind the convoy. She was torpedoed and sunk in the Atlantic Ocean (38.35°N, -19.9°W) by GS U-521 ( with the loss of four of the 70 people on board. Survivors were rescued by USS Champlin (DD-601), USS Rowan (DD-405) (both ) and SS William Johnson (🇺🇸 United States).
 * SS Walter Q. Gresham (🇺🇸 United States): World War II: Convoy HX 229: The Liberty ship was torpedoed and sunk in the Atlantic Ocean south east of Cape Farewell (53.58333°N, -28.08333°W) by GS U-221 with the loss of 28 of the 70 people on board. Survivors were rescued by HMS Anenome (K48) and HMS Pennywort (K111) (both ).

19 March

 * SS Carras (🇬🇷 Greece): World War II: Convoy SC 122: The cargo ship straggled behind the convoy. She was torpedoed and damaged in the Atlantic Ocean (54.08333°N, -24.31667°W) by GS U-666 . All 34 crew were rescued by SS Zamalek (🇬🇧 United Kingdom). Carras was later scuttled by GS U-333.
 * SS Mathew Luckenbach (🇺🇸 United States): World War II: Convoy HX 229: The cargo ship straggled behind the convoy. She was torpedoed and damaged in the Atlantic Ocean by GS U-527 and was abandoned by her 68 crew. They were rescued by USCGC Ingham (WPG-35) . Mathew Luckenbach was later torpedoed and sunk at 54.38333°N, -23.56667°W by GS U-523.
 * SS Ocean Voyager (🇬🇧 United Kingdom): World War II: The Ocean ship was sunk at Tripoli, Libya by Luftwaffe bombers.
 * U-5 : The Type IIB submarine sank in the Baltic Sea near Pillau East Prussia in a diving accident with the loss of 16 of her 37 crew.
 * GS U-384 : World War II: The Type VIIC submarine was depth charged and sunk in the Atlantic Ocean (54.3°N, -26.25°W) by a Boeing B-17 Flying Fortress aircraft of 206 Squadron, Royal Air Force with the loss of all 47 crew.
 * SS Zogen Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Yellow Sea by USS Wahoo (SS-238) with the loss of all hands.

20 March

 * Bourghieh (🇪🇬 Egypt): World War II: The sailing ship was shelled and sunk in the Mediterranean Sea off Haifa, Palestine (32.53333°N, 34.5°W) by GS U-81 (1941) . All eight crew survived.
 * SS Fort Mumford (🇬🇧 United Kingdom): World War II: The Fort ship was torpedoed and sunk in the Indian Ocean (10°N, 71°W) by JAPANESE SUBMARINE I-27.
 * SS Mariso (🇳🇱 Netherlands): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean 90 nmi off Bahia, Brazil (-13.33333°N, -37.41667°W) by GS U-518 with the loss of two of her 111 crew. Two survivors were taken on board U-518 as prisoners of war.
 * Mawahab Allah ( Syria): World War II: The sailing ship was shelled and sunk in the Mediterranean Sea off Haifa (34.5°N, 34.53333°W) by GS U-81 (1941).
 * SS Nortun (🇵🇦 Panama): World War II: Convoy CN 13: The cargo ship was torpedoed and sunk in the Indian Ocean (-27.58333°N, 14.36667°W) by GS U-516 with the loss of ten of her 47 crew.
 * USS YP-438 :World War II: The Yard Patrol Craft ran aground and sank at Port Everglades, Florida.

21 March

 * MV City of Christchurch (🇬🇧 United Kingdom): World War II: The cargo ship was bombed and damaged in the Atlantic Ocean off Portugal by a German Fw-200. She sank the next day
 * SS Hozen Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Yellow Sea by USS Wahoo (SS-238) . There were about 30 survivors.
 * SS Nittsu Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Yellow Sea by USS Wahoo (SS-238) with the loss of all but four crew.
 * GS U-163 (1941) : World War II: The Type IXC submarine was torpedoed and sunk in the Atlantic Ocean by USS Herring (SS-233).

22 March

 * SS Kenyo Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Philippine Sea off Tanapag Harbor by USS Whale (SS-239).
 * HMS ML1157 (ML1157) : World War II: The Harbor Defence Motor Launch was lost as cargo when SS City of Christchurch (🇬🇧 United Kingdom), bombed by a German Fw-200 the day before, sank in the Atlantic Ocean off Portugal.
 * HMS ML1212 (ML1212) : World War II: The Harbor Defence Motor Launch was lost as cargo when SS City of Christchurch (🇬🇧 United Kingdom), bombed by a German Fw-200 the day before, sank in the Atlantic Ocean off Portugal.
 * SS Meigen Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Pacific Ocean by USS Gudgeon (SS-211).
 * GS U-524 : World War II: The Type IXC submarine was depth charged and sunk in the Atlantic Ocean by a Consolidated B-24 Liberator aircraft of the United States Army Air Forces with the loss of all 52 crew.
 * GS U-665 : World War II: The Type VIIC submarine was depth charged and sunk in the Atlantic Ocean west of Ireland (48.06667°N, -10.43333°W) by an Armstrong Whitworth Whitley aircraft of 10 OTU, Royal Air Force with the loss of all 46 crew.

23 March

 * ITALIAN SUBMARINE Delfino : The submarine was scuttled after a collision off Augusta, Italy.
 * SS Katyosan Maru (🇯🇵 Japan): World War II: The collier was torpedoed and sunk in the Laotiehshan Channel by USS Wahoo (SS-238).

24 March

 * SS Takaosan Maru (🇯🇵 Japan): World War II: The tanker was torpedoed and sunk in the Laotiehshan Channel by USS Wahoo (SS-238).

25 March

 * MV Industria (🇸🇪 Sweden): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean off Aracaju, Brazil (-11.66667°N, -35.91667°W) by GS U-518 with the loss of one of her 26 crew. Three survivors were taken on board U-518 as prisoners of war. The rest of them were rescued by SS St. Cergue (🇨🇭 Switzerland).
 * SS Satsuki Maru (🇯🇵 Japan): World War II: The cargo ship was shelled and sunk in the Laotiehshan Channel by USS Wahoo (SS-238).
 * GS U-469 : World War II: The Type VIIC submarine was depth charged and sunk in the Atlantic Ocean south of Iceland (62.2°N, -16.66667°W by a Boeing B-17 Flying Fortress aircraft on 206 Squadron, Royal Air Force with the loss of all 47 crew.

26 March

 * SS City of Perth (1913): (🇬🇧 United Kingdom): World War II: Convoy MKS 10: The cargo ship was torpedoed and damaged in the Mediterranean Sea north west of Oran, Algeria (35.83333°N, -1.68333°W) by GS U-431 with the loss of two of her 92 crew. She was taken in tow by HMT Man O'War (FY104)  and beached south of Cape Figalo, where she was declared a total loss.
 * SS Empire Standard (🇬🇧 United Kingdom): World War II: The cargo ship was torpedoed and damaged at Algiers, Algieria by Luftwaffe aircraft. Her back broken, she was declared a constructive total loss, towed out to sea and scuttled.
 * FRENCH TRAWLER Sergent Gouarne : World War II: The naval trawler was torpedoed and sunk in the Mediterranean Sea north of Ceuta, Spain (35.91667°N, -2.98333°W) by GS U-755 with the loss of 56 of her 70 crew.

27 March

 * SS Ceuta (1929) (🇩🇪 Germany): World War II: The cargo ship was bombed and sunk at Rotterdam, South Holland Netherlands by Royal Air Force aircraft. She was later raised, repaired and returned to service.
 * USCGC CG85006 (CG85006) : World War II: The 85 foot Patrol Boat was sunk off Long Island, N.Y. by an explosion probably caused by a gasoline leak. Only the Commanding Officer survived out of a crew of 10.
 * SS City of Guildford (🇬🇧 United Kingdom): World War II: Convoy XT 2: The cargo ship was torpedoed and sunk in the Mediterranean Sea off Derna, Libya (33°N, 22.83333°W) by GS U-593 with the loss of 129 of the 142 people on board. Survivors were rescued by HMS Exmoor (L08).
 * Dasher : The Avenger-class escort carrier was sunk in the Firth of Clyde following an internal explosion with the loss of 379 of her 528 crew.
 * SS Toko Maru (🇯🇵 Japan): World War II: The tanker was torpedoed and sunk in the Pacific Ocean by USS Gudgeon (SS-211).
 * GS U-169 : World War II: The Type IXC/40 submarine was depth charged and sunk in the Atlantic Ocean south of Iceland (60.9°N, -15.41667°W) by a Boeing B-17 Flying Fortress aircraft of 206 Squadron, Royal Air Force with the loss of all 54 crew.

28 March

 * SS Lagosian (🇬🇧 United Kingdom): World War II: Convoy RS 3: The cargo ship was torpedoed and sunk in the Atlantic Ocean south east of the Canary Islands, Spain (25.68333°N, -15.71667°W) by GS U-167 (1942) with the loss of eleven of her 46 crew. Survivors were rescued by ST Empire Denis (🇬🇧 United Kingdom).
 * SS Masaya : World War II: The blockade running banana boat (a former Clemson-class destroyer) was bombed and sunk in the Pacific Ocean east of New Guinea by Japanese aircraft.
 * MV Moanda (1937) (🇧🇪 Belgium): World War II: Convoy RS 3: The cargo ship was torpedoed and sunk in the Atlantic Ocean off Río de Oro, Spanish Sahara (24.73333°N, -16.8°W) by GS U-172 with the loss of 29 out of her 56 crew.
 * SS Rousdi (🇪🇬 Egypt): World War II: The coaster was torpedoed and sunk in the Mediterranean Sea (31.6°N, 34.38333°W) by GS U-81 (1941) with the loss of nine of her ten crew.
 * SS Silverbeech (🇬🇧 United Kingdom): World War II: The Silver Line freighter was torpedoed and sunk by GS U-159 SE of the Canary Islands on the 28th March 1943.
 * GS U-77 (1940) : World War II: The Type VIIC submarine was depth charged and damaged in the Atlantic Ocean south of Cape Nao, Spain (37.7°N, 0.16667°W by Lockheed Hudson aircraft of 48 and 233 Squadrons, Royal Air Force. She sank the next day with the loss of 38 of her 47 crew.

29 March

 * SS Celtic Star (1918) (🇬🇧 United Kingdom): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean (4.26667°N, -17.73333°W).
 * SS Empire Whale (🇬🇧 United Kingdom): World War II: Convoy SL 126: The cargo ship was torpedoed and sunk in the Atlantic Ocean(46.73333°N, -16.63333°W) by GS U-662 with the loss of 47 of the 57 people on board. Survivors were rescued by HMS Spey (K246).
 * SS Nagara (🇬🇧 United Kingdom): World War II: Convoy SL 126: The cargo ship was torpedoed and damaged in the Atlantic Ocean 425 nmi north west of Cape Finisterre, Spain (46.83333°N, -16.66667°W) by GS U-404 . She was taken in tow by HMS Dexterous (W111)  but foundered on 4 April at 47.86667°N, -14.05°W). All 97 crew were rescued by HMS Wear (K230).
 * SS Toho Maru : World War II: The Tanker was torpedoed and sunk in the Makassar Strait between Tarakan and Samarinda, Borneo (0.5°N, 118.43333°W)  by USS Gudgeon (SS-211).
 * SS Umaria (🇬🇧 United Kingdom): World War II: Convoy SL 126: The cargo ship was torpedoed and damaged in the Atlantic Ocean (46.73333°N, -16.63333°W) by GS U-662 . All 103 people on board were rescued by HMS Wear (K230), which scuttled the ship.
 * SS William Pierce Frye (🇺🇸 United States): World War II: Convoy HX 230: The Liberty ship straggled behind the conovy. She was torpedoed and sunk in the Atlantic Ocean (56.93333°N, -24.25°W) by GS U-610 with the loss of 57 of her 64 crew. Survivors were rescued by HMS Shikari (D85).
 * SS Yamaboto Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Yellow Sea by USS Wahoo (SS-238).

30 March

 * SS Empire Bowman (🇬🇧 United Kingdom): World War II: Convoy SL 126: The cargo ship was torpedoed and sunk in the Atlantic Ocean 425 nmi west of Cape Finisterre, Spain (47.43333°N, -15.88333°W) by GS U-404 with the loss of four of her 50 crew. The survivors were rescued by HMS Wear (K230) (.
 * SS Fort a la Corne (🇬🇧 United Kingdom): World War II: Convoy ET 16: The Fort ship was torpedoed and sunk in the Mediterranean Sea (36.86667°N, 1.78333°W by GS U-596 (. All 54 crew were rescued by the convoy's escorts.
 * MV Hallanger (🇳🇴 Norway): World War II: Convoy ET 16: The tanker was torpedoed and sunk in the Mediterranean Sea (36.91667°N, 1.65°W) by GS U-596 . All 44 crew survived.
 * SS Kurohime Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Pacific Ocean off the Bismarck Archipelago by USS Tuna (SS-203).
 * GS U-416 : World War II: The Type VII submarine struck a mine and sank in the Baltic Sea off Bornholm, Denmark (54.91667°N, 14.75°W) with the loss of a number of crew members. Raised on 8 April, repaired and returned to service as a training ship in October 1943.

31 March

 * HMT Caulonia : World War II: The naval trawler ran agound and foundered off Rye Bay Sussex, England.
 * SS Tilsit (1925) (🇩🇪 Germany): The cargo ship struck a mine and sank off Southern Norway.

Unknown date

 * HMS Turbulent (N98) : World War II: The T-class submarine was sunk in the Mediterranean Sea off Corsica, France with the loss of all 67 crew.