List of shipwrecks in May 1943

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

1 May

 * SS Erinpura (🇬🇧 United Kingdom): World War II: Convoy MW 27 from Alexandria to Malta: The troopship was hit by a bomb in her forward hatch or deck by aircraft from KG 26 at approx. 20:15 hrs, and sank within four minutes with the loss of almost 1,000 men, 30 nautical miles North of Benghazi at (32.66667°N, 19.88333°W)
 * MV British Trust (🇬🇧 United Kingdom): World War II: Convoy MW 27 from Alexandria to Malta: The tanker was hit by a torpedo from a Heinkel 111H of KG 26 at approx. 20:00 hrs, her port side was opened for a third of her length and her cargo of oil caught fire. She listed heavily and sank within three minutes with the loss of 10 of the crew, 30 nautical miles North of Benghazi.
 * SS Adelfotis (🇬🇷 Greece): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean (-3.53333°N, -21.55°W) by GS U-182 with the loss of one of her 39 crew. Her captain was taken on board U-182 as a prisoner of war.
 * SS City of Singapore (🇬🇧 United Kingdom): World War II: Convoy TS 37: The cargo ship was torpedoed and sunk in the Atlantic Ocean 75 nmi south west of Freetown, Sierra Leone (7.91667°N, -14.26667°W) by GS U-515 . All 97 crew were rescued by HMT Arran (T06) and HMT Birdlip (T218) (both ).
 * SS Clan Macpherson (1929) (🇬🇧 United Kingdom): World War II: Convoy TS 37: The cargo ship was torpedoed and sunk in the Atlantic Ocean 75 nmi south west of Freetown (7.96667°N, -14.23333°W) by GS U-515 with the loss of four of her 140 crew. Survivors were rescued by HMT Arran (T06).
 * MV Mokambo (🇧🇪 Belgium): World War II: Convoy TS 37: The cargo ship was torpedoed and damaged in the Atlantic Ocean 75 nmi south west of Freetown (7.96667°N, -14.23333°W) by GS U-515 . She was taken in tow by HMS Aimwell (W113) and HMS Oriana (W117) (both ) but capsized and sank the next day. All 57 crew survived.
 * MV Port Victor (1942) (🇬🇧 United Kingdom): World War II: The refrigerated cargo liner was torpedoed and sunk in the Atlantic Ocean (47.81667°N, -22.03333°W) by GS U-107 (1940) with the loss of nineteen of the 164 people on board. Survivors were rescued by HMS Wren (U28).
 * SOVIET SUBMARINE ShCh-323 : World War II: The Shchuka-class submarine was sunk by a mine in the Baltic Sea off Petershof. Raised and scrapped 1944.

2 May

 * USCGC CG58012 (CG58012) : World War II: The 58 foot Patrol Boat was sunk off the Mary Ann Rocks whistle buoy, Manomet Point, Mass. by an explosion in the engine room. All 4 crewmen survived.
 * SS Gneisenau (1935) (🇩🇪 Germany): World War II: The ocean liner struck a mine in the Baltic Sea, capsized and sank. The wreck was raised on 12 July 1950 and scrapped in Denmark.
 * FINNISH GUNBOAT Turunmaa : World War II: The gunboat was sunk in an air raid south of Kotka. Raised 23 October 1943 and repaired.
 * HMS MTB 311 (MTB311) : World War II: The ELCO 77' -class Motor Torpedo Boat was sunk in the Mediterranean Sea by a mine off Bone, Algeria.
 * GS U-465 : World War II: The Type VIIC submarine was depth charged and sunk in the Bay of Biscay north of Cape Finisterre, Spain (44.8°N, -8.96667°W) by a Short Sunderland aircraft of 461 Squadron, Royal Australian Air Force with the loss of all 48 crew.

3 May

 * USS LCT-23 (LCT-23) : World War II: The LCT (Mk 5)-class Landing Craft, Tank was sunk at Algiers by an underwater explosion.

4 May

 * SS Lorient (1921) (🇬🇧 United Kingdom):World War II: Convoy ONS 5: The cargo ship straggled behind the convoy. She was torpedoed and sunk in the Atlantic Ocean south of Cape Farewell, Greenland (54.06667°N, -44.3°W) by GS U-125 (1940) with the loss of all 43 crew.
 * Noku Maru (🇯🇵 Japan): World War II: The trawler was shelled and sunk in the Pacific Ocean by USS Gudgeon (SS-211).
 * USAT Oneira : World War II: The ship straggled behind her convoy and foundered in the Atlantic Ocean 70 nmi north east of Cape Charles, Virginia. Thirty-one people were rescued by USS Andres (DE-45).
 * MV Panam (🇵🇦 Panama): World War II: Convoy NK 538: The tanker straggled behind the convoy. She was torpedoed and sunk in the Atlantic Ocean off the coast of North Carolina, United States by GS U-129 (1941) with the loss of two of her 51 crew. Survivors were rescued by USS SC-664.
 * JAPANESE AUXILIARY TANKER San Clemente Maru : World War II: The tanker was torpedoed and sunk in the Pacific Ocean 50 miles southeast of Palau by USS Seal (SS-183) . 1 Crewman killed. Survivors rescued by Hoei Maru.
 * GS U-109 (1940) : World War II: The Type IXB submarine was depth charged and sunk in the Atlantic Ocean (47.36667°N, -22.66667°W) by a Consolidated Liberator aircraft of 86 Squadron, Royal Air Force with the loss of all 52 crew.
 * GS U-439 : The Type VIIC submarine collided with GS U-659 and sank in the Atlantic Ocean west of Cape Ortegal, Spain (43.53333°N, -13.33333°W) with the loss of nine of her 49 crew.
 * GS U-659 : The Type VIIC submarine collided with GS U-439 in the Atlantic Ocean west of Cape Ortegal (43.53333°N, -13.33333°W and sank with the loss of 44 of her 47 crew.

5 May

 * SS Bonde (1936) (🇳🇴 Norway): World War II: Convoy ONS 5: The cargo ship was torpedoed and sunk in the Atlantic Ocean (53.46667°N, -44.33333°W) by GS U-266 with the loss of fourteen of her 26 crew. Survivors were rescued by HMS Tay.
 * SS Bristol City (1920) (🇬🇧 United Kingdom): World War II: Convoy ONS 5: The cargo ship was torpedoed and sunk in the Atlantic Ocean south of Cape Farewell, Greenland (54°N, -43.91667°W) by GS U-358 with the loss of fifteen of her 49 crew. Survivors were rescued by HMS Loosestrife (K105).
 * SS Daifuku Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Yellow Sea by USS Snook (SS-279).
 * MV Dolius (🇬🇧 United Kingdom): World War II: Convoy ONS 5: The cargo ship was torpedoed and sunk in the Atlantic Ocean east of Belle Isle, Newfoundland (54°N, -43.58333°W) by GS U-638 with the loss of four of her 70 crew. Survivors were rescued by HMS Sunflower (K41).
 * SS Fingal (1923) (🇳🇴 Norway): World War II: The cargo ship was torpedoed and sunk in the Pacific Ocean off Coff's Harbour, New South Wales, Australia (-30.58333°N, 153.48333°W) by JAPANESE SUBMARINE I-180 with the loss of twelve of her 31 crew. Survivors were rescued by USS Patterson (DD-392).
 * SS Gharinda (🇬🇧 United Kingdom): World War II: Convoy ONS 5: The cargo ship was torpedoed and sunk in the Atlantic Ocean (53.16667°N, -44.66667°W) by GS U-266 . All 92 crew were rescued by HMS Tay (K232).
 * SS Hakkai Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Pacific Ocean off the coast of Honshu by USS Sawfish (SS-276).
 * SS Harbury (🇬🇧 United Kingdom): World War II: Convoy ONS 5: The cargo ship was torpedoed, shelled and sunk in the Atlantic Ocean 500 nmi south of Cape Farewell, Greenland (55.01667°N, -52.98333°W) by GS U-628 with the loss of seven of her 49 crew. Survivors were rescued by HMT Northern Spray (FY129).
 * SS Harperley (🇬🇧 United Kingdom): World War II: Convoy ONS 5: The cargo ship was torpedoed and sunk in the Atlantic Ocean (55°N, -42.96667°W) by GS U-264 with the loss of ten of her 49 crew. Survivors were rescued by HMT Northern Spray (FY129) . Harperley later sank at 55.05°N, -42.93333°W).
 * SS Hartwelson (🇺🇸 United States): The cargo ship ran aground on the Bantam Rock off the coast of Maine and foundered.
 * SS Holmbury (1925) (🇬🇧 United Kingdom): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean 170 nmi west of Cape Palmas, Liberia (4.5°N, -10.33333°W) by GS U-123 (1940) with the loss of two of her 46 crew. The captain was taken on board U-123 as a prisoner of war, other survivors reached land in their lifeboats.
 * SS Kinko Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Yellow Sea by USS Snook (SS-279).
 * SS North Britain (1940) (🇬🇧 United Kingdom): World War II: Convoy ONS 5: The cargo ship straggled behind the convoy. She was torpedoed and sunk in the Atlantic Ocean (55.13333°N, -42.71667°W) by GS U-707 with the loss of 35 of her 46 crew. Survivors were rescued by HMT Northern Spray (FY129).
 * SS Selvistan (🇬🇧 United Kingdom): World War II: Convoy ONS 5: The cargo ship was torpedoed and sunk in the Atlantic Ocean (53.16667°N, -44.66667°W) by GS U-266 with the loss of six of her 46 crew. Survivors were rescued by HMS Tay (K232).
 * GS U-638 : World War II: The Type VIIC submarine was depth charged and sunk in the Atlantic Ocean north east of Newfoundland (54.2°N, -44.08333°W) by HMS Sunflower (K41) with the loss of all 44 crew.
 * SS Wentworth (🇬🇧 United Kingdom): World War II: Convoy ONS 5: The cargo ship was torpedoed and damaged in the Atlantic Ocean (53.98333°N, -43.91667°W) with the loss of five of her 47 crew. Survivors were rescued by HMS Loosestrife (K105), which scuttled the ship.
 * USS West Madaket (ID-3636) (🇺🇸 United States): World War II: Convoy ONS 5: The Design 1013 cargo ship straggled behind the convoy. She was torpedoed and sunk in the Atlantic Ocean south of Cape Farewell, Greenland (54.78333°N, -44.2°W) by GS U-584 . All 61 crew were rescued by HMS Pink (K137).
 * SS West Maximus (🇺🇸 United States): World War II: Convoy ONS 5: The Design 1013 cargo ship was torpedoed and sunk in the Atlantic Ocean (55.16667°N, -43°W by GS U-264 with the loss of six of the 62 people on board. Survivors were rescued by HMT Northern Spray (FY129).

6 May

 * SS Amazone (🇳🇱 Netherlands): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean off Miami, Florida, United States (27.35°N, -80.06667°W) by GS U-333 with the loss of fourteen of her 25 crew. Survivors were rescued by USS PC-484.
 * SS Halsey (🇺🇸 United States): World War II: The tanker was torpedoed and sunk in the Atlantic Ocean off Jupiter Inlet, Florida (27.23333°N, -80.05°W) by GS U-333 . All 32 crew were rescued by American fishing vessels.
 * SS Java Arrow (🇺🇸 United States): World War II: The tanker was torpedoed and damaged 8 nmi off Vero Beach, Florida (27.58333°N, -80.13333°W) by GS U-333 with the loss of two of her 47 crew. Survivors abandoned ship, and were rescued by USS PC-483 . Java Arrow was later towed into Port Everglades, Florida. Subsequently repaired and returned to service in 1943 as Kerry Patch.
 * GS U-125 (1940) : World War II: The Type IXC submarine was rammed and damaged in the Atlantic Ocean (52.5°N, -45.33333°W) by HMS Oribi (G66) . She was then shelled and sunk by HMS Snowflake (K211). All 54 crew took to their lifeboats, but the Admiralty forbid the British ships to rescue them and they subsequently died.
 * GS U-192 : World War II: The Type IXC/40 submarine was depth charged and sunk in the Atlantic Ocean south east of Cape Farewell, Greenland (53.1°N, -45.03333°W) by HMS Loosestrife (K105) with the loss of all 55 crew.
 * GS U-438 : World War II: The Type VIIC submarine was depth charged and sunk in the Atlantic Ocean (52°N, -45.16667°W) by HMS Pelican (L86) with the loss of all 48 crew.
 * GS U-531 : World War II: The Type IXC/40 submarine was depth charged and sunk in the Atlantic Ocean north east of Newfoundland (52.8°N, -45.3°W) by HMS Vidette (D48).
 * GS U-630 : World War II: The Type VIIC submarine was depth charged and sunk in the Atlantic Ocean north east of Newfoundland (52.51667°N, -44.83333°W) by HMS Vidette (D48) with the loss of all 47 crew.

7 May

 * SS Berakit (🇳🇱 Netherlands): World War II: The cargo ship was torpedoed and sunk by a submarine in the Indian Ocean, east of the Felidhu Atoll in the Maldives (3.66667°N, 75.33333°W).
 * MV Brand (1927) (🇳🇴 Norway): World War II: Convoy HX 243: The cargo ship straggled behind the convoy. She was torpedoed and sunk in the Atlantic Ocean (47.31667°N, -24.68333°W) by GS U-603 with the loss of three of her 42 crew. Survivors were rescued by HMCS Morden (K-170) . Date of attack may have been 12 May.
 * SS Hosei Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Yellow Sea by USS Snook (SS-279).
 * SS Laconikos (🇬🇷 Greece): World War II: Convoy SL 128: The cargo ship was torpedoed and sunk in the Atlantic Ocean north east of the Azores, Portugal (41.66667°N, -18.21667°W) by GS U-89 (1941) with the loss of 23 of her 34 crew. Survivors were rescued by HMS Shippigan (J212).
 * SS Samuel Jordan Kirkwood (🇺🇸 United States): World War II: The Liberty ship torpedoed and sunk in the South Atlantic 125 nmi south east of Ascension Island (-15°N, -7°W) by GS U-195 . All 71 people on board were rescued by a United States Army rescue boat.
 * SS Tamon Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Pacific Ocean off thee Kuril Islands by USS Wahoo (SS-238).
 * GS U-447 : World War II: The Type VIIC submarine was depth charged and sunk in the Atlantic Ocean west of Gibraltar (35.5°N, -11.91667°W) by two Lockheed Hudson aircraft of 233 Squadron, Royal Air Force with the loss of all 48 crew.
 * GS U-663 : World War II: The Type VIIC submarine was depth charged and damaged in the Bay of Biscay west of Brest, Finistère, France by Short Sunderland aircraft of 10 Squadron, Royal Australian Air Force. She sank the next day with the loss of all 49 crew.
 * ZF-5 : World War II: The training hulk, the former French  Audacieux, was bombed and sunk at Bizerte, Tunisia by British aircraft.

8 May

 * HMAS Adele : The examination vessel hit a breakwater and sank at Port Kembla, New South Wales.
 * HMT Daneman : World War II: The naval trawler struck an iceburg and sank under tow in the Atlantic Ocean south of Greenland(58.05°N, 44°W).
 * JAPANESE DESTROYER Kagerō : World War II: The Kagerō-class destroyer was bombed and sunk in the Pacific Ocean south west of Rendova, Solomon Islands (-8.13333°N, 156.91667°W) by American aircraft.
 * Kuroshio : World War II: The Kagerō-class destroyer struck a mine and sank in the Pacific Ocean off Kolombangara, Solomon Islands.
 * SS Liv ( undefined): World War II: The cargo ship was torpedoed and damaged at Porto Torres, Sardinia by HMS Safari (P211) . She was bombed and sunk the next day by Royal Air Force aircraft. Scrapped at La Spezia, Liguria in January 1948.
 * Oyashio : World War II: The Kagerō-class destroyer was disabled by a mine and then sunk by aircraft near Kolombangara.
 * SS Pat Harrison (🇺🇸 United States): World War II: The Liberty ship was damaged by an Italian limpet mine at Gibraltar. She was beached but declared a constructive total loss. Scrapped in 1951.

9 May

 * SS Aso Maru (🇯🇵 Japan): World War II: The coaster was torpedoed and sunk in the Sulu Sea south of Negros, Philippines by USS Gar (SS-206).
 * MV Corneville (🇳🇴 Norway): World War II: The cargo ship was torpedoed and sunk in the Gulf of Guinea 30 nmi off Takoradi, French West Africa (4.83333°N, -1.16667°W) by GS U-515 . All 41 crew survived.
 * SS Jinmu Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Pacific Ocean off the Kuril Islands by USS Wahoo (SS-238).
 * SS Kanbe (🇬🇧 United Kingdom): World War II: Convoy TS 38: The cargo ship was torpedoed and sunk in the Atlantic Ocean 60 nmi south of Monrovia, Liberia by GS U-123 (1940) with the loss of 61 of her 66 crew. Survivors were rescued by SS Rio Francoli (🇪🇸 Spain).
 * HMS MTB 61 (MTB61) : World War II: The Vosper 70' -class Motor Torpedo Boat was wrecked in the Mediterranean Sea  off Kelibia, Tunisia.
 * SS Takao Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Pacific Ocean off the Kuril Islands (38.95°N, 141.81667°W) by USS Wahoo (SS-238).

10 May

 * SS Kinai Maru : World War II: The transport was torpedoed and damaged in the Pacific Ocean 243 miles east of Saipan (14.55°N, 149.38333°W) by USS Plunger (SS-179) . She was shelled and sunk with Plunger's deck gun the next day. 4 crewmen killed.
 * HMS MTB 264 (MTB264) : World War II: The ELCO 70' -class Motor Torpedo Boat was sunk by a mine in the Mediterranean Sea off Sousse, Tunisia.
 * SS Tatsutake Maru : World War II: The ammunition ship was torpedoed and sunk in the Pacific Ocean 243 miles east of Saipan (14.55°N, 149.38333°W) by USS Plunger (SS-179) . 4 crewmen killed.

11 May

 * SS Antigone (1928) (🇬🇧 United Kingdom): World War II: Convoy SC 129: The cargo ship was torpedoed and sunk in the Atlantic Ocean 300 nmi north west of the Azores, Portugal (40.5°N, -32.5°W) by GS U-402 with the loss of three of her 46 crew. Survivors were rescued by SS Melrose Abbey (🇬🇧 United Kingdom).
 * SS Clan Skene (🇬🇧 United Kingdom): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean (31.71667°N, -70.71667°W) by GS U-333 with the loss of nine of her 82 crew. Survivors were rescued by USS McKean (APD-5).
 * SS Fort Concord (🇬🇧 United Kingdom): World War II: Convoy HX 237: The Fort ship straggled behind the convoy. She was torpedoed and sunk in the Atlantic Ocean (46.08333°N, -25.33333°W) by GS U-456 with the loss of 35 of her 56 crew. Survivors were rescued by HMCS Drumheller (K167)  and GS U-103 (1940).
 * SS Grado (🇳🇴 Norway): World War II: Convoy SC 129: The cargo ship was torpedoed and sunk in the Atlantic Ocean (40.5°N, -32.5°W) by GS U-402 . All 36 crew were rescued by SS Melrose Abbey (🇬🇧 United Kingdom).
 * HMS ML 133 : World War II: The Fairmile B motor launch was destroyed in a fire off the west coast of Scotland.
 * SS Nailsea Meadow (🇬🇧 United Kingdom): World War II: The cargo ship was torpedoed and sunk in the Indian Ocean 40 nmi south of Port St Johns, Cape Colony (-32.06667°N, 29.23333°W) by GS U-196 with the loss of two of her 44 crew. Survivors were rescued by R-6 (Ensign of the South African Air Force 1940-1951.svg South African Air Force).
 * SS Tinhow (🇬🇧 United Kingdom): World War II: The cargo ship was torpedoed and sunk in the Mozambique Channel (-25.25°N, 33.5°W) by GS U-181 with the loss of 75 of the 230 people on board. Survivors were rescued by Portuguese fishing vessels.
 * GS U-528 : World War II: The Type IXC/40 submarine was depth charged and sunk in the Atlantic Ocean (46.91667°N, -14.73333°W) by Handley Page Halifax aircraft of 58 Squadron, Royal Air Force with the loss of eleven of her 56 crew.
 * SS Yodogawa Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Pacific Ocean (0.66667°N, 148.91667°W) by USS Grayback (SS-208) . 2 crewmen killed.

12 May

 * JAPANESE SUBMARINE I-31 : World War II: The I-15 -class Submarine was depth charged, shelled and sunk in the Pacific Ocean 5 miles northeast of Chichago Harbor, Attu (-52.13333°N, 177.63333°W)  by USS Edwards (DD-619)  . Lost with all 95 hands.
 * HMS MMS 89 (J589) : World War II: The MMS-class minesweeper was sunk in the Mediterranean Sea by a mine off Bizerta, Tunisia.
 * MV Sandanger (1938) (🇳🇴 Norway): World War II: Convoy HX 237: The tanker straggled behind the convoy. She was torpedoed and sunk in the Atlantic Ocean (approximately 49°N, -21°W) by GS U-221 with the loss of twenty of her 39 crew. Survivors were rescued by HMCS Kootenay (H75).
 * SS Sumatra Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Pacific Ocean by USS Gudgeon (SS-211).
 * GS U-89 (1941) : World War II: The Type VIIC submarine was sunk in the Atlantic Ocean (46.5°N, -25.66667°W) by a Fairey Swordfish aircraft of 811 Squadron, Fleet Air Arm, based on HMS Biter (D97) and by HMS Broadway (H90) and HMS Lagan (K259) (all ) with the loss of all 48 crew.
 * GS U-186 : World War II: The Type IXC/40 submarine was depth charged and sunk in the Atlantic Ocean north of the Azores, Portugal (41.9°N, -31.81667°W) by HMS Hesperus (H57) with the loss of all 53 crew.
 * GS U-456 : World War II: The Type VIIC submarine was damaged in the Atlantic Ocean by a Fido homing torpedo dropped by a Consolidated B-24 Liberator aircraft of 86 Squadron, Royal Air Force. She dived in an effort to evade an attack by HMS Opportune (G80) but was lost with all 49 crew.

13 May

 * SS Klaus Howaldt (🇩🇪 Germany): World War II: The cargo ship was torpedoed by aircraft off Lista, Norway, and beached.
 * SS Mambí (🇨🇺 Cuba): World War II: Convoy NC 18: The tanker was torpedoed and sunk in the Atlantic Ocean 6 nmi north of Manati (21.41667°N, -76.66667°W) by GS U-176 with the loss of 23 of her 34 crew.
 * Mocenigo : World War II: The Marcello-class submarine was bombed and sunk at Cagliari, Sardinia by US Army aircraft.
 * SS Nickeliner (🇺🇸 United States): World War II: Convoy NC 18: The tanker was torpedoed and sunk in the Atlantic Ocean 6 nmi north of Manati (21.41667°N, -76.66667°W) by GS U-176 . All 31 crew were rescued by a Cuban submarine chaser.
 * GS U-753 : World War II: The Type VIIC submarine was depth charged and sunk in the Atlantic Ocean (48.61667°N, -22.65°W) by a Short Sunderland aircraft of 423 Squadron, Royal Canadian Air Force and also by HMCS Drumheller (K167) and HMS Lagan (K259)  with the loss of all 47 crew.

14 May

 * AHS Centaur (🇦🇺 Australia): World War II: The hospital ship was torpedoed and sunk in the Pacific Ocean off Queensland (-27.28306°N, 153.98694°W), probably by JAPANESE SUBMARINE I-177 with the loss of 332 of the 396 people on board.
 * HMS HDML 1154 : World War II: The Harbour Defence Motor Launch was sunk by a mine off of Bizerta, Algeria..
 * GERMAN MINESWEEPER M-8 : World War II: The minesweeper was torpedoed and sunk off Hook of Holland (52.05°N, 3.85°W).
 * SOVIET SUBMARINE M-122 : World War II: The M-class submarine was sunk off the Rybachiy Peninsula (69.93333°N, 32.88333°W) by German aircraft.
 * GS U-235 : World War II: The Type VIIC submarine was sunk at Keil, Schleswig-Holstein in an American air raid. She was subsequently raised, repaired and returned to service.
 * GS U-237 : World War II: The Type VIIC submarine was sunk at Kiel in an American air raid. She was subsequently raised, repaired and returned to service.
 * GS U-640 : World War II: The Type VIIC submarine was depth charged and sunk in the Atlantic Ocean south east of Cape Farewell, Greenland (60.53333°N, -31.08333°W) by a Consolidated PBY Catalina aircraft of the United States Navy with the loss of all 49 crew.

15 May

 * SS Irish Oak (1919) ( undefined): World War II: The Design 1019 cargo ship was torpedoed and sunk in the Atlantic Ocean (47.85°N, -25.88333°W) by GS U-607 . All 33 crew were rescued by SS Irish Plane (🇮🇪 Ireland).
 * SS Mcikai Maru (🇯🇵 Japan): World War II: The cargo liner was torpedoed and sunk in the Sulu Sea south of Negros, Philippines by USS Gar (SS-206).
 * SS Indus Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Sulu Sea south of Negros by USS Gar (SS-206).
 * SS Maroussio Logothetis (🇬🇷 Greece): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean (5.46667°N, -14.46667°W) by GS U-105 (1940) with the loss of 27 of her 39 crew. One crew member was taken on board U-105 as a prisoner of war. Other survivors were rescued by a Consolidated PBY Catalina aircraft of 270 Squadron, Royal Air Force.
 * GS U-176 : World War II: The Type IXC submarine was depth charged and sunk in the Atlantic Ocean 23.35°N, -80.3°W) by CUBAN SUBMARINE CHASER CS-13 with the loss of all 53 crew.
 * GS U-266 : World War II: The Type VIIC submarine was depth charged and sunk in the Atlantic Ocean (45.46667°N, -10.33333°W) by a Handley Page Halifax aircraft of 58 Squadron, Royal Air Force with the loss of all 47 crew.

16 May

 * SS William K. Vanderbilt (🇺🇸 United States): World War II: The Liberty ship was torpedoed and sunk in the Pacific Ocean off Suva, Fiji (-18.68333°N, 175.11667°W) by JAPANESE SUBMARINE I-19.
 * GS U-182 : World War II: The Type IX submarine was depth charged and sunk by USS MacKenzie (DD-614) with the loss of all 61 crew and two prisoners of war. The latter were the captains of SS Adelfotis (🇬🇷 Greece) and SS Aloe (🇬🇧 United Kingdom).
 * GS U-463 : World War II: The Type XIV submarine was depth charged and sunk in the Bay of Biscay (45.95°N, -11.66667°W) by a Handley Page Halifax aircraft of 58 Squadron, Royal Air Force with the loss of all 57 crew.

17 May

 * SS Aymeric (🇬🇧 United Kingdom): World War II: Convoy ONS 7: The cargo ship was torpedoed and sunk in the Atlantic Ocean (59.7°N, -41.65°W) by GS U-657 with the loss of 53 of her 78 crew. Survivors were rescued by SS Copeland (🇬🇧 United Kingdom) and HMT Northern Wave (FY153).
 * SS Bygdøy (1921) (🇳🇴 Norway): World War II: The cargo ship struck a mine and sank in Öresund. All fourteen crew survived.
 * SS England Maru : World War II: The transport was torpedoed and sunk in the Pacific Ocean (-0.75°N, 148.5°W) by USS Grayback (SS-208) . 232 troops and 13 crewmen killed.
 * MS Eurostadt (🇩🇪 Germany): World War II: The cargo ship was torpedoed and sunk by a submarine off Vadsø, Norway.
 * GERMAN MINESWEEPER M-414 : World War II: The minesweeper was torpedoed and sunk by aircraft off Texel, the Netherlands.
 * MV Northmoor (🇬🇧 United Kingdom): World War II: Convoy LMD 17: The cargo ship was torpedoed and sunk in the Indian Ocean (-28.45°N, 32.71667°W) by GS U-198 with the loss of twelve of her 39 crew. Survivors were rescued by HMT St Loman (FY276).
 * GS U-128 (1941) : World War II: The Type IXC submarine was depth charged and sunk in the Atlantic Ocean (10°N, -35.58333°W) by USS Jouett (DD-396) and USS Moffett (DD-362) (both ) with the loss of seven of her 54 crew.
 * GS U-646 : World War II: The Type VIIC submarine was depth charged and sunk in the Atlantic Ocean south east of Iceland (62.16667°N, -14.61667°W) by a Lockheed Hudson aircraft of 269 Squadron, Royal Air Force with the loss of all 46 crew.
 * GS U-657 : World War II: The Type VIIC submarine was depth charged and sunk in the Atlantic Ocean east of Cape Farewell, Greenland (58.9°N, -42.55°W) by HMS Swale (K217) with the loss of all 47 crew.

18 May

 * SS Empire Eve (🇬🇧 United Kingdom): World War II: The CAM ship was torpedoed and sunk in the Mediterranean Sea off Algeria (36.61667°N, 0.76667°W) by GS U-414 with the loss of five of her 61 crew. Survivors were rescued by HMS Barfoil (Z194) and a Landing Craft, Tank (both ).
 * GERMAN MINESWEEPER M-345 : The minesweeper was bombed and sunk by aircraft off Dunkerque, France.
 * SS Terushima Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Pacific Ocean by USS Pollack (SS-180).

19 May

 *  Angelus (🇬🇧 United Kingdom): World War II: The three-masted schooner was shelled and sunk in the Atlantic Ocean (38.66667°N, -64°W) by GS U-161 (1941) with the loss of eight of her ten crew. Survivors were rescued by USS Turner (DD-648).
 * SS Bangkok Maru : World War II: The Armed Merchant Cruiser was torpedoed and sunk in the Pacific Ocean off Jaluit Atoll, Marshall Islands (6.78333°N, 169.7°W) by USS Pollack (SS-180) . 496 troops and 6 crewmen killed. Survivors rescued by JAPANESE DESTROYER Ikazuchi.
 * GS U-273 : World War II: The Type VIIC submarine was depth charged and sunk in the Atlantic Ocean (59.41667°N, -24.55°W) by a Lockheed Hudson aircraft of 269 Squadron, Royal Air Force.
 * GS U-953 : World War II: The Type VIIC submarine was hedgehogged and sunk in the Atlantic Ocean south east of Cape Farewell, Greenland (54.9°N, -34.31667°W) by HMS Jed (K235) and HMS Sennen (Y21) (both ) with the loss of all 47 crew.

20 May

 * SS Benakat (🇳🇱 Netherlands): World War II: The tanker was torpedoed and sunk in the South Atlantic (-6.08333°N, -12.93333°W) by GS U-197 . All 44 crew survived.
 * GS U-258 : World War II: The Type VII submarine was depth charged and sunk in the Atlantic Ocean (55.3°N, -27.81667°W) by a Consolidated B-24 Liberator aircraft of 120 Squadron, Royal Air Force with the loss of all 49 crew.

21 May

 * ITALIAN SUBMARINE Gorgo : World War II: The Flutto-class submarine was depth charged and sunk in the Mediterranean Sea off Oran, Algeria by USS Nields (DD-616).
 * GS U-303 : World War II: The Type VIIC submarine was torpedoed and sunk in the Mediterranean Sea off Toulon, Var, France (42.83333°N, 6°W) by HMS Sickle (P224) with the loss of twenty of her 48 crew.

22 May

 * GS U-569 : World War II: The Type VIIC submarine was depth charged and damaged in the Atlantic Ocean by two Grumman TBM Avenger aircraft based on USS Bogue (CVE-9) with the loss of 21 of her 46 crew. She was consequently scuttled (50.66667°N, -35.35°W) due to damage received.

23 May

 * ITALIAN SUBMARINE Leonardo da Vinci : World War II: The Marconi-class submarine was depth charged and sunk in the Atlantic Ocean west of Portugal (42.26667°N, -15.66667°W) by HMS Active (H14) and HMS Ness (K219) both
 * USS Niagara (PG-52) : World War II: The gunboat was bombed and sunk in the Pacific Ocean off Tulagi, Solomon Islands by Japanese aircraft. All 136 crew were rescued by USS PT-146 and USS PT-147 (both ).
 * USS PT-165 : World War II: The ELCO 80'-class PT Boat was scuttled as a result of damage from the torpedoing and sinking of Tanker Stanvac Manila that the PT Boat was being carried as deck cargo 100 miles south of Nouméa, New Caledonia (-23.75°N, 166.5°W).
 * USS PT-173 : World War II: The ELCO 80'-class PT Boat was scuttled as a result of damage from the torpedoing and sinking of Tanker Stanvac Manila that the PT Boat was being carried as deck cargo 100 miles south of Nouméa, New Caledonia (-23.75°N, 166.5°W).
 * SS Stanvac Manila (🇵🇦 Panama): World War II: The Tanker was torpedoed and sunk in the Pacific Ocean 100 miles south of Nouméa, New Caledonia (-23.75°N, 166.5°W) by JAPANESE SUBMARINE I-17  .  8 crewmen, 3 Gunners and 1 Navy passenger were killed. 85 men were rescued by USS Preble (DD-345).
 * GS U-752 : World War II: The Type VIIC submarine was sunk in the Atlantic Ocean (51.66667°N, -29.81667°W) by a rocket attack from Fairey Swordfish aircraft of 819 Squadron, Fleet Air Arm based on HMS Archer (D78) with the loss of 29 of her 46 crew.

24 May

 * SS Tana (1921) (🇩🇪 Germany): World War II: The cargo ship was bombed and sunk off Olbia, Sardinia, Italy by Allied aircraft. She was raised in 1946 but sank whilst under tow to Genoa.

25 May

 * ITALIAN TORPEDO BOAT Groppo : World War II: The Ciclone-class Torpedo Boat  was bombed and sunk at Messina, Sicily, Italy by US Army aircraft.
 * GS U-414 : World War II: The Type VIIC submarine was depth charged and sunk in the Mediterranean Sea north west of Ténès, Algeria (36.51667°N, 0.66667°W) by HMS Vetch (K132) with the loss of all 47 crew.
 * GS U-467 : World War II: The Type VIIC submarine was depth charged and sunk in the Atlantic Ocean south east of Iceland (62.41667°N, -14.86667°W) by a Consolidated PBY Catalina aircraft of the United States Navy with the loss of all 46 crew.

26 May

 * SS Kagi Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Pacific Ocean west of Kyushu by USS Saury (SS-189).
 * SS Shoei Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk at Apra Harbor, Guam by USS Whale (SS-239) with the loss of all hands.
 * GS U-436 : World War II: The Type VIIC submarine was depth charged and sunk in the Atlantic Ocean west of Cape Ortegal, Spain (43.81667°N, -15.93333°W) by HMS Hyderabad (K212) and HMS Test (K239) (both ) with the loss of all 47 crew.

27 May

 * FRENCH DESTROYER Léopard : The Chacal-class destroyer ran aground and was wrecked off Tobruk, Libya.
 * MV Sicilia (1934) (🇸🇪 Sweden): World War II: The cargo ship was captured in the Indian Ocean (-24.51667°N, 35.2°W) by GS U-181 . The 23 crew were ordered to abandon ship, after which she was scuttled.

28 May

 * SS Agwimonte (🇺🇸 United States): World War II: Convoy CD 20: The Type C1 cargo ship was torpedoed and sunk in the South Atlantic (-34.95°N, 19.55°W) by GS U-177 . All 69 crew were rescued by HMSAS Vereeniging ( and a South African Army rescue boat.
 * SS Akatsuki Maru : World War II: The Auxiliary Oiler was torpedoed and sunk in the Pacific Ocean west of Kyushu (-27.66667°N, 125.91667°W) by USS Saury (SS-189) . 35 crewmen killed.
 * SS Florida (1937) (🇺🇸 USA): World War II: Convoy BT 14: The cargo ship was torpedoed and damaged in the Atlantic Ocean 125 nmi east of Fortaleza, Brazil (-3.93333°N, -36.71667°W) by GS U-154 (1941) . Her back broken, she was abandoned by her 69 crew, who were rescued by USS PC-592 . Florida was taken in tow by USS Saucy (PG-65) . She was later repaired and returned to service.
 * SS John Worthington (🇺🇸 United States): World War II: Convoy BT 14: The tanker was torpedoed and damaged in the Atlantic Ocean 125 nmi east of Fortaleza (-3.86667°N, -36.8°W) by GS U-154 (1941) . The ship was declared a constructive total loss and was not repaired.
 * SS Kamikawa Maru : World War II: The seaplane tender was torpedoed and damaged in the Bismarck Sea (-1.6°N, 150.4°W) by USS Scamp (SS-277) She was finished off in the early hours of the next day. 39 crewmen and 3 Army civilian employees killed.
 * MV Storaas (1929) (🇳🇴 Norway): World War II: Convoy CD 20: The tanker was torpedoed and sunk in the Indian Ocean (-34.95°N, 19.55°W) by GS U-177 with the loss of three of her 45 crew. Survivors were rescued by HMSAS Vereeniging.
 * GS U-304 : World War II: The Type VIIC submarine was depth charged and sunk in the Atlantic Ocean south east of Cape Farewell, Greenland by a Consolidated B-24 Liberator aircraft of 120 Squadron Royal Air Force with the loss of all 46 crew.
 * GS U-755 : World War II: The Type VIIC submarine was attacked with rockets and sunk in the Mediterranean Sea north of Mallorca, Spain (39.96667°N, 1.68333°W) by a Lockheed Hudson aircraft of 608 Squadron, Royal Air Force with the loss of 40 of her 49 crew.

29 May

 * SS Eiski Maru (🇯🇵 Japan): World War II: the cargo ship was torpedoed and sunk in the Pacific Ocean by USS Tambor (SS-198).
 * MV Hopetarn (🇬🇧 United Kingdom): World War II: The cargo ship was torpedoed and sunk in the Indian Ocean (-30.83333°N, 39.53333°W) by GS U-198 with the loss of seven of her 44 crew. One survivor was taken on board U-198 as a prisoner of war, the rest were rescued by SS Nirvana (🇬🇧 United Kingdom).
 * HMS MGB 110 : World War II: The (BPB 72'-class Motor Gunboat) was sunk by Kriegsmarine warships off Dunkirk.
 * SS Shoko Maru (🇯🇵 Japan): World War II: The ship was torpedoed and sunk in the Pacific Ocean west of Kyushu by USS Saury (SS-189).
 * SS Takamisan Maru (🇯🇵 Japan): World War II: The ship was torpedoed and sunk in the Pacific Ocean west of Kyushu by USS Saury (SS-189).

30 May

 * SS Flora MacDonald (🇺🇸 United States): World War II: The Liberty ship was torpedoed and damaged in the Atlantic Ocean (7.25°N, -13.33333°W) by GS U-126 (1940) with the loss of seven of her 70 crew. She arrived on fire at Freetown, Sierra Leone on 6 June and was declared a constructive total loss.
 * USS LCT-28 : World War II: The Mk 5-class Landing Craft, Tank struck a mine and sank in the Mediterranean Sea.
 * Llancarfan ( undefined): She was bombed and sunk 2 nmi south of Cape St. Vincent while on a voyage from Glasgow to Lisbon and Malta with coal and coke.
 * HMS Untamed (P58) : The U-class submarine sank in the Firth of Clyde with the loss of all 35 crew. She was later salvaged, repaired and re-entered service as HMS Vitality.

31 May

 * GS U-440 : World War II: The Type VIIC submarine was depth charged and sunk in the Atlantic Ocean west of Cape Ortegal, Spain (45.63333°N, -13.06667°W) by a Short Sunderland aircraft of 201 Squadron, Royal Air Force with the loss of all 46 crew.
 * GS U-563 : World War II: The Type VIIC submarine was depth charged and sunk in the Bay of Biscay (46.58333°N, -10.66667°W) by Handley Page Halifax and Short Sunderland aircraft of 10 Squadron, Royal Australian Air Force, and 58 and 228 Squadrons, Royal Air Force with the loss of all 49 crew.

Unknown date

 * GS U-209 : World War II: The Type VIIC submarine was attacked and damaged on 4 May by a Consolidated PBY Catalina aircraft of the Royal Canadian Air Force. She was subsequently lost on or about 7 May, possibly due to damaged received, with the loss of all 46 crew.
 * GS U-381 : World War II: The Type VIIC submarine disappeared on patrol in the Atlantic Ocean south of Greenland sometime between 9 and 21 May with the loss of all 47 crew.