List of shipwrecks in May 1942

The list of shipwrecks in May 1942 includes all ships sunk, foundered, grounded, or otherwise lost during May 1942.

1 May

 * SS Angarstroy ( Soviet Union): World War II: The cargo ship was torpedoed and sunk in the Pacific Ocean 32 nmi off the coast of Japan by USS Grenadier (SS-210) . The survivors claimed that a Japanese submarine had sunk the ship.
 * SS Calcutta Maru : World War II: The cargo ship was torpedoed and sunk in the East China Sea (28.18333°N, 123.91667°W) off Wenchow, China by USS Triton (SS-201) . 4 crewmen and 50 passengers killed.
 *  James E. Newsom (🇨🇦 Canada): World War II: The schooner was shelled and sunk in the Atlantic Ocean 370 nmi north east of Bermuda (35.83333°N, -50.66667°W) by GS U-69 (1940) . All nine crew survived.
 * MV La Paz (🇬🇧 United Kingdom): World War II: The cargo ship was torpedoed and damaged in the Atlantic Ocean 10 nmi south east of Cape Canaveral, Florida, United States (28.25°N, -80.33333°W) by GS U-109 (1940) (. She was beached and later refloated and repaired at Jacksonville, Florida.
 * JAPANESE SEAPLANE TENDER Mizuho : World War II: The Seaplane Tender was torpedoed  in the Pacific Ocean 40 miles  off Omae Zaki by USS Drum (SS-228)  before midnight. Sank in the early hours of May 2. 101 crewmen killed.
 * SS Parnahyba (🇧🇷 Brazil): World War II: The cargo ship was torpedoed, shelled and sunk in the Caribbean Sea off Trinidad by GS U-162 (1941) with the loss of seven of her 72 crew. Survivors were rescued by MV Turret Cape (🇨🇦 Canada).
 * HMS Punjabi (F21) : The Tribal-class destroyer was rammed and sunk in the Greenland Sea by HMS King George V (41) with the loss of 49 of her 258 crew.
 * SS Taei Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the East China Sea by USS Triton (SS-201).
 * MV Tsiolkovskij ( Soviet Union): World War II: Convoy QP 11: The cargo ship was torpedoed and damaged in the Barents Sea (71.76667°N, 34.5°W) by GS U-589 . She then straggled behind the convoy and was sunk by GERMAN DESTROYER Z25 and GERMAN DESTROYER Z25 (both ) with the loss of 27 of her 41 crew. Survivors were rescued by HMT Lord Middleton (FY219).
 * GS U-573 : World War II: The Type VIIC submarine was depth charged and damaged in the Mediterranean Sea (approximately 37°N, 1°W) by a Lockheed Hudson aircraft of 233 Squadron, Royal Air Force with the loss of one of her 44 crew. She put into Cartagena due to damage received and was interned. Sold to the Armada Española in August 1942, serving until 1970 as G-7 and S-01.
 * SS Worden (🇳🇮 Nicaragua): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean off Cape Canaveral by GS U-109 (1940).

2 May

 * SS Botavon ( undefined): Convoy PQ 15: The 5,848 grt freighter was torpedoed and sunk whilst anchored in 73.03333°N, 19.76667°W on voyage from Middlesbrough, via Reykjavik, to Murmansk with Government stores. On the 3rd May 1942 the wreck was sunk by convoy escort
 * SS Cape Corso ( undefined): Convoy PQ 15: The 3,807 grt freighter was sunk by German torpedo bombers while in a convoy to Russia. Of her complement of 56, only 6 survived
 * USS Cythera (PY-26) : World War II: The naval yacht was torpedoed and sunk in the Atlantic Ocean 115 nmi east of Cape Fear, North Carolina by GS U-402  with the loss of 69 of her 71 crew. The survivors were taken on board U-402 as prisoners of war.
 * HMS Edinburgh (16) : World War II: Convoy QP 11: The Town-class cruiser was shelled and damaged in the Barents Sea off Bear Island, Norway by GERMAN DESTROYER Z7 Hermann Schoemann, GERMAN DESTROYER Z24 and GERMAN DESTROYER Z25 (all ) with the loss of 58 of her crew. About 840 survivors were rescued by HMS Gossamer (J63) and HMS Harrier (J71) (both ). HMS Edinburgh was scuttled by HMS Foresight (H68).
 * GERMAN DESTROYER Z7 Hermann Schoemann : World War II: The Type 1934A-class destroyer was shelled and damaged in the Barents Sea off Bear Island by HMS Edinburgh (16) and was consequently scuttled by her crew.
 * ORP Jastrząb : World War II: The S-class submarine was shelled and damaged in the Barents Sea by HMS Seagull (J85) and HNOMS St. Albans (I15)  with the loss of five crew. Once the error was realised, both ships rescued the survivors, and Jastrząb was scuttled by HMS Seagull at 71.5°N, 12.53333°W.
 * USS Mindanao (PR-8) : World War II: The gunboat was scuttled in Manila Bay, Philippines.
 * MV Sandar (1928) (🇳🇴 Norway): World War II: The tanker was torpedoed and sunk in the Atlantic Ocean (11.7°N, -61.16667°W) by GS U-66 (1940) with the loss of three of her 37 crew. Survivors were rescued by SS Alcoa Pilot (🇺🇸 United States).
 * GS U-74 (1940) : World War II: The Type VIIB submarine was depth charged and sunk in the Atlantic Ocean off Cartagena, Spain by a Consolidated PBY Catalina aircraft of 202 Squadron, Royal Air Force and also by HMS Wishart (D67) and HMS Wrestler (D35) (both ) with the loss of all 47 crew.
 * SS Uzan Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Pacific Ocean off the south east coast of Honshū (33.43333°N, 135.86667°W by USS Trout (SS-202).

3 May

 * SS British Workman (🇬🇧 United Kingdom): World War II: Convoy ON 89: The tanker straggled behind the convoy. She was torpedoed and sunk in the Atlantic Ocean south east of Cape Race, Newfoundland (44.11667°N, -51.88333°W) by GS U-455 with the loss of six of her 53 crew. Survivors were rescued by HMCS Alberni (K103) and HMCS Assiniboine (I18) (both ).
 * SS Konsul Karl Fisser (1914) (🇩🇪 Germany): World War II: The cargo ship was bombed and sunk in the Norwegian Sea off Ålesund, Møre og Romsdal, Norway by aircraft of No. 608 Squadron RAF.
 * SS Jutland (1928) (🇬🇧 United Kingdom): World War II: Convoy PQ 15: The cargo ship straggled behind the convoy. She was torpedoed and damaged in the Barents Sea by an aircraft of KG 26, Luftwaffe with the loss of one of the 62 people on board. Survivors abandoned ship and were rescued by HMS Badsworth (L03) . The ship was torpedoed and sunk on 3 May at 73.03333°N, 19.76667°W by GS U-251.
 * SS Laertes (🇳🇱 Netherlands): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean south east of Cape Canaveral, Florida, United States (28.35°N, -80.38333°W) by GS U-109 (1940) with the loss of eighteen of her 66 crew. Survivors either reached land in their lifeboat or were rescued by a United States Navy aircraft.
 * SS Ocean Venus (🇬🇧 United Kingdom): World War II: The Ocean ship was torpedoed and sunk in the Atlantic Ocean 12 nmi east south east of Cape Canaveral, Florida, United States (28.38333°N, -80.35°W) by GS U-564 with the loss of five of her 47 crew.
 * MV Sama (🇳🇮 Nicaragua): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean (25.06667°N, -79.75°W) by GS U-506 . All fourteen crew were rescued by SS Athelregent (🇬🇧 United Kingdom).
 * SS San Rafael (1905) (🇩🇴 Dominican Republic): World War II: The cargo ship was torpedoed and sunk in the Caribbean Sea (18.6°N, -79.2°W) by GS U-125 (1940) with the loss of one of her 38 crew.

4 May

 * SS Eastern Sword (🇺🇸 United States): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean 12 nmi off the Georgetown Lighthouse, British Guiana (7.16667°N, -57.96667°W) by GS U-162 (1941) with the loss of sixteen of her 29 crew. One survivor was rescued by the fishing vessel Ocean Star ( British Guiana), the rest made land in their lifeboat.
 * SS Eclipse (1931) (🇬🇧 United Kingdom): World War II: The tanker was torpedoed and sunk in the Atlantic Ocean off Fort Lauderdale, Florida, United States (26.5°N, -80°W) by GS U-564 with the loss of two of her 47 crew. Later salvaged, repaired and returned to service in December 1942.
 * SS Empire Story (🇬🇧 United Kingdom): The cargo ship ran aground on Briar Island, Nova Scotia, Canada and was abandoned. She refloated herself and was later taken in tow by SS Foundation Franklin (🇨🇦 Canada) with the intention of taking her to Digby, Nova Scotia but she capsized and sank at 44.58333°N, -66.31667°W.
 *  Florence M Douglas (🇬🇧 United Kingdom): World War II: The three-masted schooner was shelled and sunk in the Atlantic Ocean 7.91667°N, -58.16667°W) by GS U-162 (1941) . All crew survived.
 * SS Herrenwyk (1912) (🇩🇪 Germany): World War II: The cargo ship struck a mine and sank in the Bay of Kiel, Germany.
 * SS Klaus Fritzen (🇩🇪 Germany): World War II: The cargo ship was bombed and sunk at Måløy, Sogn og Fjordane, Norway by Royal Air Force aircraft.
 * SS Kinjosan Maru : World War II: The Armed Merchant Cruiser was torpedoed and sunk in the Pacific Ocean 9.41667°N, 151.85°W off Truk, South Pacific Mandate by USS Greenling (SS-213).
 * JAPANESE GUNBOAT Kongosan Maru : World War II: The auxiliary gunboat was torpedoed and sunk in the Pacific Ocean south east of Honshū (33.53333°N, 136.08333°W) by USS Trout (SS-202).
 * JAPANESE DESTROYER Kikuzuki : World War II: The was torpedoed in Tulagi Harbor by US Navy aircraft, and beached on Florida Island. Slid into deep water and sank 5 May. Later refloated and beached by US Engineers.
 * SS Norlindo (🇺🇸 United States): World War II: The Design 1074 cargo ship was torpedoed and sunk in the Gulf of Mexico 80 nmi north west of Dry Tortugas Island (24.95°N, -84°W) by GS U-507 with the loss of five of her 28 crew. Survivors were rescued by SS San Blas (🇵🇦 Panama).
 * USS Pigeon (ASR-6) : World War II: The Submarine Rescue Vessel, a former Lapwing-class minesweeper was bombed and sunk at Corregidor, Philippines by a Japanese Dive Bomber.
 * JAPANESE AUXILIARY MINESWEEPER Tama Maru : World War II: The auxiliary Minesweeper was damaged in Purvis Bay, Florida Island, Solomon Islands by US Navy aircraft, sinking on 6 May.
 * USS Tanager (AM-5) : World War II: The Lapwing-class minesweeper was sunk at Corregidor by shore-based artillery.
 * SS Tuscaloosa City (🇺🇸 United States): World War II: The cargo ship was torpedoed and sunk in the Caribbean Sea 200 nmi west of Negrit, Jamaica (18.41667°N, -81.51667°W) by GS U-125 (1940) . All 34 crew were rescued by SS Falcon (1919) (🇺🇸 United States).
 * JAPANESE AUXILIARY MINESWEEPER Wa-1 : World War II: The auxiliary Minesweeper was sunk in Purvis Bay, Florida Island, Solomon Islands by US Navy aircraft.
 * JAPANESE AUXILIARY MINESWEEPER Wa-2 : World War II: The auxiliary Minesweeper was sunk in Purvis Bay, Florida Island, Solomon Islands by US Navy aircraft.
 * SS Wartenfels (🇩🇪 Germany): World War II: The cargo ship was scuttled at Diégo-Suarez, Madagascar.

5 May

 * SS Afoundria (1919) (🇺🇸 United States): World War II: The Design 1022 cargo ship was torpedoed and sunk in the Atlantic Ocean 8 nmi north of the Le Male Lighthouse, Haiti (19.98333°N, -73.43333°W). All 46 people on board were rescued by USS Mulberry (AN-27).
 * HMS Auricula (K12) (: World War II: Battle of Madagascar: The Flower-class corvette struck a mine in the Indian Ocean off the northern tip of Madagascar. She was taken in tow by HMS Freesia (K43) ( but sank the next day.
 * FRENCH SUBMARINE Beveziers (🇫🇷 Vichy France): World War II: Battle of Madagascar: The was bombed and sunk  in Currier Bay, Diego Suarez, Madagascar (-12.26667°N, 49.28333°W).
 * FRENCH AUXILIARY CRUISER Bouganville (🇫🇷 Vichy France): World War II: Battle of Madagascar: The Armed Merchant Cruiser was torpedoed and sunk in Currier Bay, Diego Suarez, Madagascar by Royal Navy aircraft.
 * SS Delisle (🇺🇸 United States): World War II: The cargo ship was torpedoed and damaged in the Atlantic Ocean 15 nmi off Jupiter Inlet, Florida (47.31667°N, -52.45°W) by GS U-564 with the loss of two of the 38 people on board. Survivors abandoned ship, but the crew reboarded her the next day and she was towed to Miami, Florida by a United States Navy tug. Later repaired and returned to service.
 * FRENCH COLONIAL SLOOP D'Entrecastreax (🇫🇷 Vichy France): World War II: Battle of Madagascar: The was bombed and sunk in the Indian Ocean off Madagascar by aircraft from HMS Illustrious (87) and gunfire from HMS Active (H14) and HMS Panther (G41) (all ). Raised, repaired and put in Free French service.
 * USS Genesee (AT-55) : World War II: The fleet tug was scuttled off Corregidor Island, Philippines. She was subsequently salvaged by the Imperial Japanese Navy, repaired and entered service as Patrol Boat No. 107.
 * SS John Adams (🇺🇸 United States): World War II: The Liberty ship was torpedoed and sunk in the Pacific Ocean off New Caledonia (-23.5°N, 164.58333°W) by JAPANESE SUBMARINE I-21.
 * SS Joseph M. Cudahy (🇺🇸 United States): World War II: The tanker was torpedoed and sunk in the Gulf of Mexico 125 nmi west of Naples, Florida (25.95°N, -83.95°W) by GS U-507 with the loss of 27 of her 37 crew. Survivors were rescued by Consolidated PBY Catalina aircraft of the United States Navy.
 * JAPANESE DESTROYER Kikuzuki : World War II: Operation Mo: The Mutsuki-class destroyer was torpedoed and sunk in Tulagi Harbor by aircraft based on USS Yorktown (CV-5) with the loss of twelve of her 154 crew. The wreck was later raised by the Americans.
 * SS Lady Drake (🇨🇦 Canada): World War II: The passenger ship was torpedoed and sunk in the Atlantic Ocean 90 nmi north of Bermuda (35.71667°N, -64.71667°W) by GS U-106 (1940) with the loss of twelve of the 268 people on board. Survivors were rescued by USS Owl (AM-2).
 * SS Magnhild (1903) (🇳🇴 Norway): The cargo ship ran aground on Virgin Rocks, Placentia Bay, Newfoundland. All twenty crew were rescued by USS Brant (AM-24) . Magnhild was declared a total loss on 23 May.
 * SS Munger T. Ball (🇺🇸 United States): World War II: The tanker was torpedoed and sunk in the Gulf of Mexico 80 nmi north west of Dry Tortugas Island (25.28333°N, -83.95°W) by GS U-507 with the loss of 30 of her 34 crew. Survivors were rescued by MV Katy (1931) (🇳🇴 Norway).
 * SS Sizilen (🇩🇪 Germany): World War II: The cargo ship was bombed and sunk in the North Sea off Borkum, Lower Saxony by Royal Air Force aircraft.
 * USS Vaga (YT-116) :World War II: The Harbor Tug was scuttled off Corrigidor (14.41667°N, 120.5°W).

6 May

 * SS Abgara (🇱🇻 Latvia): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean south east of Great Inagua Island, the Bahamas (20.75°N, -72.91667°W) by GS U-108 (1940). All 34 crew reached land in their lifeboats.
 * SS Alcoa Puritan (1941) (🇺🇸 United States): World War II: The Type C1-B cargo ship was torpedoed and sunk in the Gulf of Mexico 15 nmi off the mouth of the Mississippi River (28.58333°N, -88.36667°W) by GS U-507 . All 54 people on board were rescued by USCGC Boutwell (WPC-130).
 * SS Empire Buffalo (🇬🇧 United Kingdom): World War II: Convoy SC 71: The cargo ship was torpedoed and sunk in the Caribbean Sea west of the Cayman Islands (19.23333°N, -82.56667°W) by GS U-125 (1940) with the loss of 13 of her 42 crew. Survivors were rescued by SS Caique} (🇺🇸 United States).
 * SS Green Island (🇺🇸 United States): World War II: The cargo ship was torpedoed and sunk in the Caribbean Sea 80 nmi south of Grand Cayman Island (18.41667°N, -81.5°W) by GS U-125 (1940) . All 22 crew were rescued by SS Fort Qu'Appelle (🇬🇧 United Kingdom).
 * SS Kanan Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the South China Sea by USS Skipjack (SS-184).
 * USS Luzon (PG-47) : World War II: The gunboat was scuttled in Manila Bay, Philippines. She was salvaged by the Imperial Japanese Navy later that month, repaired and entered service as Karatsu
 * HMS ML 160 (ML160) : World War II: The Motor Launch was bombed and sunk at Brixton.
 * USS Oahu (PR-6) (: World War II: The gunboat was sunk in Manila Bay off Corregidor, Philippines by Imperial Japanese Navy ships.
 * USS Quail (AM-15) : The Lapwing-class minesweeper was scuttled at Corredgidor.
 * HMT Senateur Duhamel (FY327) : World War II: The Naval trawler was rammed and sunk in the Atlantic Ocean off Cape Lookout, N. Carolina by Auxiliary USS Semmes (AG-24).
 * SS Taiei Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the East China Sea by USS Triton (SS-201).
 * SS Taigen Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the East China Sea by USS Triton (SS-201).

7 May

 * SS Frank Seamans (🇳🇴 Norway): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean (6.35°N, -55.63333°W) by GS U-162 (1941) . All 27 crew were rescued by MV Koningin Emma (1939) (🇳🇱 Netherlands).
 * FRENCH SUBMARINE Le Héros (🇫🇷 Vichy France): World War II: Battle of Madagascar: The Redoutable-class submarine was sunk in the Indian Ocean off Madagascar by Royal Navy ships.
 * HMS ML 130 (ML130) : World War II: The Motor Launch was sunk by gunfire from enemy Motor Torpedo Boats off Malta.
 * USS Neosho (AO-23) : World War II: Battle of the Coral Sea: The Cimmaron-class oiler was bombed and damaged in the Coral Sea by Japanese aircraft. She was scuttled on 11 May by USS Henley (DD-391).
 * SS Ontario (1904) (🇭🇳 Honduras): World War II: The cargo ship was torpedoed and sunk in the Gulf of Mexico (28.18333°N, -87.53333°W) by GS U-507 . All 45 crew were rescued by USS Onyx (PYc-5).
 * Shōhō : World War II: Battle of the Coral Sea: The Zuihō-class aircraft carrier was bombed and sunk in the Coral Sea (-16.12056°N, 151.91306°W) by aircraft based on USS Lexington (CV-2) and USS Yorktown (CV-5) (both ) with the loss of 631 of her 833 crew.
 * USS Sims (DD-409) : World War II: Battle of the Coral Sea: The Sims-class destroyer was torpedoed and sunk in the Coral Sea by Japanese Aichi D3A Val aircraft with the loss of 177 of her 192 crew.

8 May

 * SS Bujun Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the South China Sea by USS Skipjack (SS-184).
 * MS Duca Degli Abruzzi ( undefined): World War II: The cargo ship was scuttled at Diégo-Suarez, Madagascar.
 * USS Lexington (CV-2) : World War II: Battle of the Coral Sea: The Lexington-class aircraft carrier was scuttled by USS Phelps (DD-360) ( following battle damage. Around 300 of her 2,122 crew were killed.
 *  Mildred Pauline (🇬🇧 United Kingdom): World War II: The three-masted schooner was shelled and sunk in the Atlantic Ocean off the coast of Nova Scotia, Canada by GS U-136 (1941) with the loss of all seven crew.
 * FRENCH SUBMARINE Monge (🇫🇷 Vichy France): World War II: Battle of Madagascar: The Redoutable-class submarine was sunk in the Indian Ocean off Madagascar by HMS Active (H14) and HMS Panther (G41) (both ).
 * SS Ohioan (1919) (🇺🇸 United States): World War II: The Design 1015 cargo ship was torpedoed and sunk in the Atlantic Ocean 10 nmi off Boynton Beach, Florida (26.51667°N, -79.98333°W) by GS U-564 with the loss of fifteen of her 37 crew. Survivors were rescued by United States Coast Guard ships.
 * HMS Olympus (N35) : World War II: The Odin-class submarine struck a mine and sank in the Mediterranean Sea off Malta (35.91667°N, 14.58333°W with the loss of 89 of the 98 people on board.
 * SS Somalia (1918) ( undefined): World War II: The cargo ship was scuttled at Diégo-Suarez, Madagascar. Wreck later raised and scrapped.
 * SS Taiyo Maru : World War II: The transport ship was torpedoed and sunk in the Pacific Ocean 170 miles south west of Me Shima, Nannyo Gunto, Kyushu by USS Grenadier (SS-210) . 656 passengers, 156 crewmen and 4 gunners killed
 * SS Torny (🇳🇴 Norway). World War II: The cargo ship was torpedoed and sunk in the Gulf of Mexico (26.75°N, -86.66667°W) by GS U-507 with the loss of two of her 26 crew. Survivors were rescued by two United States Navy aircraft.

9 May

 * MV Calgarolite (🇨🇦 Canada): World War II: The tanker was torpedoed, shelled and sunk in the Caribbean Sea 50 nmi south west of Grand Cayman Island (19.4°N, -82.5°W) by GS U-125 (1940) . All 45 crew survived.
 * SS Douro (1921) (🇳🇴 Norway): World War II: The cargo ship was bombed and sunk in the Atlantic Ocean (60.68333°N, -12.96667°W) by Luftwaffe aircraft with the loss of ten of her twenty crew. Survivors were rescued by the trawler Gyllir (Light Blue Flag of Iceland.svg Iceland).
 * SS John Adams (1942) (🇺🇸 United States): World War II: The Liberty ship was sunk in the Pacific Ocean by enemy action. Thirteen survivors were rescued by USS Helm (DD-388).
 * MV Lise (1930) (🇳🇴 Norway): World War II: The tanker was torpedoed, shelled and sunk in the Atlantic Ocean (13.88333°N, -68.33333°W) by GS U-69 (1940) with the loss of twelve of her 33 crew. Some of the survivors were rescued by HNLMS Femern  and SS Socrates (🇳🇱 Netherlands), others reached land in their lifeboat.
 * SS Lubrafol (🇵🇦 Panama): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean 3 nmi off Delray Beach, Florida, United States by GS U-564 . Thirteen crew were killed, 31 survivors rescued by the United States Coast Guard. The wreck was broken up for scrap in 1954.
 * GERMAN MINESWEEPER M-533 : World War II: The minesweeper was sunk in a collision with GERMAN MINESWEEPER R-45 northwest of Boulogne, France.
 * SS Mount Louis (🇨🇦 Canada): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean south of Trinidad (8.38333°N, -58.73333°W) by GS U-162 (1941) with the loss of thirteen of her 21 crew. Survivors were rescued by  Mona Marie (🇨🇦 Canada).
 * GERMAN MINESWEEPER R-45 : World War II: The minesweeper was sunk in a collision with GERMAN MINESWEEPER M-533 northwest of Boulogne, France.
 * GS U-352 : World War II: The Type VIIC submarine was depth charged and sunk in the Atlantic Ocean south of Morehead City, North Carolina, United States (34.35°N, -76.58333°W) by USCGC Icarus (WPC-110) with the loss of fifteen of her 48 crew.

10 May

 * MV Aurora (1920) (🇺🇸 United States): World War II: The tanker was torpedoed and damaged in the Gulf of Mexico 40 nmi off the Southwest Pass, Louisiana (28.58333°N, -90°W) by GS U-506 with the loss of one of her 50 crew. Survivors abandoned ship, and were rescued by USS Onyx (PYc-5) and USS YP-157 (both ). Aurora was taken in tow by ST Robert W. Wilmot (🇺🇸 United States) and USS Tuckahoe (WYT-89)  and taken to Algiers, Louisiana, where she was declared a total loss. Subsequently repaired and returned to service in 1943 as Jamestown.
 * SS Kitty's Brook (🇬🇧 United Kingdom): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean 35 nmi south east of Cape Sable, Nova Scotia, Canada (42.93333°N, -63.98333°W) by GS U-588 with the loss of nine of her 34 crew.
 * HMS Ramb IV : World War II: The Hospital Ship was bombed and set afire by Luftwaffe Junkers Ju 88s  off Alexandria, Egypt. Of the 360 wounded and Staff aboard, 155 wounded and 10 crew members were lost. Ship was scuttled by Royal Navy ships at (31.28333°N, 29.38333°W).

11 May

 * HMT Bedfordshire : World War II: The naval trawler was torpedoed and sunk in the Atlantic Ocean off Cape Lookout, North Carolina (34.16667°N, -76.68333°W) by GS U-558 with the loss of all 35 crew.
 * ST C 308 (🇬🇧 United Kingdom): World War II: the tug was bombed and sunk at Malta by Luftwaffe aircraft.
 * MV Cape of Good Hope (🇬🇧 United Kingdom): World War II: The cargo ship was torpedoed, shelled and sunk in the Atlantic Ocean north east of the Virgin Islands (22.8°N, -58.71667°W) by GS U-502 . All 37 crew survived.
 * HMS Jackal (F22) : World War II: The J-class destroyer was bombed and damaged in the Mediterranean Sea north west of Mersa Matruh, Egypt by Junkers Ju 88 aircraft of Lehrgeschwader 1, Luftwaffe, with the loss of 77 of her crew. She was subsequently scuttled the next day by HMS Jervis (F00).
 * SS Kinjosan Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Pacific Ocean off Truk, South Pacific Mandate by USS Greenling (SS-213).
 * HMS Kipling (F91) : World War II: The K-class destroyer was bombed and sunk in the Mediterranean Sea north west of Mersa Matruh by Junkers Ju 88 aircraft of Lehrgeschwader 1, Luftwaffe.
 * HMS Lively (G40) : World War II: The L-class destroyer was bombed and sunk in the Mediterranean Sea 100 nmi north east of Tobruk, Libya by Junkers Ju 88 aircraft of Lehrgeschwader 1, Luftwaffe, with the loss of 77 of her 221 crew.

12 May

 * HMT Bedfordshire (FY141) : World War II: The naval trawler was torpedoed and sunk in the Atlantic Ocean off Cape Lookout, North Carolina, United States (34.16667°N, -76.68333°W) by GS U-558 with the loss of all 37 crew.
 * SS Cocle (🇵🇦 Panama): World War II: Convoy ON 92: The cargo ship was torpedoed and sunk in the Atlantic Ocean (52.61667°N, -29.21667°W) by GS U-94 (1940) with the loss of five of her 42 crew. The survivors were rescued by SS Bury (🇬🇧 United Kingdom).
 * SS Cristales (🇬🇧 United Kingdom): World War II: Convoy ON 92: The cargo ship was torpedoed and damaged in the Atlantic Ocean (52.91667°N, -29.83333°W) and was abandoned by her 82 crew. They were rescued by USCGC Spencer (WPG-36) and HMCS Shediac (K110) (. Cristales was scuttled by the latter ship.
 * SS Empire Dell (🇬🇧 United Kingdom): World War II: Convoy ON 92: The CAM ship was torpedoed and sunk in the Atlantic Ocean (50°N, -29.95°W) by GS U-124 (1940) with the loss of two of her 48 crew.
 * SOVIET SUBMARINE K-23 : World War II: The K-class submarine was sunk off Nordkyn, Olesafjord, Norway in the Barents Sea by Auxiliary warships UJ-1101, 1108, and 1110 (all.
 * SS Leto (🇳🇱 Netherlands): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean 8 nmi north of Cap-de-la-Madeleine, Quebec, Canada (49.53333°N, -65.31667°W) by GS U-553 with the loss of twelve of the 53 people on board, including one of the four survivors from MV Oscilla (🇳🇱 Netherlands).
 * SS Llanover (🇬🇧 United Kingdom): World War II: Convoy ON 92: The cargo ship was torpedoed and damaged in the Atlantic Ocean (52.83333°N, -29.06667°W by GS U-124 (1940) . All 46 crew were rescued by SS Bury (🇬🇧 United Kingdom). Llanover was scuttled by HMCS Arvida (K113).
 * SS Mount Parnes (🇬🇷 Greece): World War II: Convoy ON 92: The cargo ship was torpedoed and damaged in the Atlantic Ocean (52.51667°N, -29.33333°W) by GS U-124 (1940) . She was later scuttled by one of the convoy escorts. All 33 crew survived.
 * SS Nicoya (🇬🇧 United Kingdom): World War II: The cargo ship was torpedoed and sunk in the Gulf of St. Lawrence south o Anticosti Island, Quebec, Canada (49.31667°N, -64.25°W) by GS U-553 with the loss of six of the 88 people on board.
 * JAPANESE MINELAYER Okinoshima : World War II: The Minelayer was torpedoed and damaged in the Bismarck Sea southwest of Buka Island by USS S-42 (SS-153), she sank under tow in the St. George Channel off of New Ireland, Papua New Guinea (-5.1°N, 153.8°W).
 * JAPANESE REPAIR SHIP Shoei Maru : World War II: The salvage ship (a.k.a. Matsue Maru) was torpedoed and sunk in the Bismarck Sea (-4.85°N, 152.25°W) 6 nmi northeast of Cape St. George, New Ireland, Papua New Guinea by USS S-44 (SS-155) while on its way to assist Okinoshima.
 * SS Virginia (1941) (🇺🇸 United States): World War II: The tanker was torpedoed and sunk in the Gulf of Mexico (28.88333°N, -89.48333°W) by GS U-507 with the loss of 27 of her 41 crew. Survivors were rescued by USS PT-157.

13 May

 * SS Batna (🇬🇧 United Kingdom): World War II: Convoy ON 92: The cargo ship was torpedoed and sunk in the Atlantic Ocean (52.15°N, -33.93333°W) by GS U-94 (1940) with the loss of one of her 42 crew. Survivors were rescued by SS Bury (🇬🇧 United Kingdom).
 * SS City of Melbourne (1919) (🇬🇧 United Kingdom): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean west of Barbados (15°N, -54.66667°W) by GS U-156 (1941) with the loss of one of her 87 crew.
 * SS Denpark (🇬🇧 United Kingdom): World War II: Convoy SL 109: The cargo ship was torpedoed and sunk in the Atlantic Ocean (22.46667°N, -28.16667°W) by GS U-128 (1941) with the loss of 21 of her 46 crew. Survivors were rescued by SS City of Windsor (1923) (🇬🇧 United Kingdom).
 * SS Esso Houston (🇺🇸 United States): World War II: The tanker was torpedoed and sunk in the Atlantic Ocean 150 nmi east of Barbados (12.2°N, -57.41667°W) by GS U-162 (1941) with the loss of one of her 42 crew. Survivors were rescued by MV Havprins (🇳🇴 Norway) or reached land in their lifeboats.
 * SS Gulfpenn (🇺🇸 United States): World War II: The tanker was torpedoed and sunk in the Gulf of Mexico (28.48333°N, -89.2°W) by GS U-506 with the loss of thirteen of her 38 crew. Survivors were rescued by SS Telde (🇭🇳 Honduras).
 * MV Hav (1939) (🇳🇴 Norway): World War II: The cargo ship struck a mine and was damaged in the Mediterranean Sea off Port Said, Egypt with the loss of two of her 38 crew. She was taken in tow and beached (31.29917°N, 2.3525°W) but was declared a constructive total loss.
 * GERMAN TORPEDO BOAT Iltis : World War II: The torpedo boat was torpedoed and sunk off Boulogne-sur-Mer, France (50.76667°N, 1.56667°W) by Royal Navy MTBs.
 * MV Koenjit (🇳🇱 Netherlands): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean 300 nmi north north east of Barbados (15.5°N, -52.66667°W) by GS U-156 (1941) . All 37 crew survived.
 * Letitia Porter (🇳🇱 Netherlands): The motor launch was being carried as deck cargo on board MV Koenjit (🇳🇱 Netherlands) and was lost when that ship was torpedoed and sunk by GS U-156 (1941).
 * HMS MTB 220 : World War II: The Vosper 70'-class Motor Torpedo Boat was sunk by gunfire from a Kriegsmarine Schnellboot.
 * SS Nagasaki Maru (🇯🇵 Japan): World War II: The ocean liner struck a mine and sank in the Pacific Ocean off Nagasaki with the loss of 39 people. Her captain later committed hari-kiri.
 * SS Norlantic (🇺🇸 United States): World War II: The Design 1099 cargo ship was torpedoed and sunk in the Atlantic Ocean (12.21667°N, -66.5°W by GS U-69 (1940)  with the loss of seven of her 29 crew. Survivors were rescued by  India,  Mississippi (both 🇳🇱 Netherlands), SS Marpesia (🇳🇴 Norway) and the tug Crusader Kingston (flag unknown).
 * GERMAN TORPEDO BOAT Seeadler : World War II: The torpedo boat was torpedoed and sunk off Boulogne-sur-Mer, France (50.76667°N, 1.56667°W) by Royal Navy MTBs. 85 crewmen killed.
 * SS Tolken (🇸🇪 Sweden): World War II: Convoy ON 92: The cargo ship was torpedoed and sunk in the Atlantic Ocean 675 nmi south east of Cape Farewell, Greenland (51.83333°N, -33.58333°W) by GS U-94 (1940) . All 34 crew were rescued by SS Bury (🇬🇧 United Kingdom).

14 May

 * SS Amapala (🇭🇳 Honduras): World War II: The cargo ship was torpedoed and damaged in the Gulf of Mexico (26.66667°N, -88.28333°W by GS U-507 with the loss of one of her 57 crew. Survivors were rescued by the fishing schooner Gonzalez (🇺🇸 United States) and a United States Navy aircraft. Amapala was taken in tow by USCGC Boutwell (WPC-130)  but foundered on 16 May at 26.5°N, -89.2°W).
 * MV Brabant (1938) (🇧🇪 Belgium): World War II: The cargo ship was torpedoed and sunk in the Caribbean Sea (11.53333°N, -62.71667°W) by GS U-155 (1941) with the loss of three of the 37 people on board.
 * SS British Colony (🇬🇧 United Kingdom): World War II: The tanker was torpedoed and sunk in the Atlantic Ocean 90 nmi north east of Bridgetown, Barbados (13.2°N, -58.16667°W) by GS U-162 (1941) with the loss of four of her 47 crew.
 * SS Comayagua (🇭🇳 Honduras): World War II: The cargo ship was torpedoed and sunk in the  Caribbean Sea 14 nmi west by south of Grand Cayman Island (19°N, -81.61667°W) by GS U-125 (1940)  with the loss of seven of her 42 crew. Survivors were rescued by  Cimboco (🇬🇧 United Kingdom).
 * SS David McKelvy (🇺🇸 United States): World War II: The tanker was torpedoed and damaged in the Gulf of Mexico 35 nmi south to the mouth of the Mississippi River (28.5°N, -89.91667°W) by GS U-506 with the loss of seventeen of her 42 crew. Survivors abandoned ship and were rescued by USCGC Boutwell (WPC-130)  and MV Norsol (🇳🇴 Norway). David McKelvy was beached on the Louisiana coast where she was declared a total loss.
 * SOVIET DESTROYER Dzerjinsky : World War II: The Novik-class destroyer was sunk by a mine off Sevastopol.
 * SS Isbjørn (1894) (🇳🇴 Norway): World War II: Operation Fritham: The icebreaker was bombed and sunk in Isfjord, Svalbard by Focke Wulf Fw 200 Kondor aircraft Luftwaffe with the loss of seventeen of her 21 crew.
 * SS Mount Olympus (🇬🇷 Greece): World War II: The cargo ship struck a mine and sunk in the Mediterranean Sea off Port Said, Egypt (31.35°N, 32.35°W) with the loss of three of her 30 crew.
 * SS Potrero del Llano (🇲🇽 Mexico): World War II: The tanker was torpedoed and sunk in the Atlantic Ocean off Cape Florida, Florida, United States (25.58333°N, -80.1°W) by U-564 with the loss of 13 of her 35 crew.
 * MV Selis (🇳🇴 Norway): World War II: Operation Fritham: The seal catcher was bombed and sunk in Isfjord by Focke Wulf Fw 200 Kondor aircraft of the Luftwaffe with the loss of twelve of the 82 people on board.
 * SS William C. McTarnahan (🇺🇸 United States): World War II: The tanker was torpedoed, shelled and damaged in the Gulf of Mexico 35 nmi east of the Ship Shoal Lighthouse, Louisiana (28.86667°N, -90.33333°W) by GS U-506 with the loss of eighteen of her 45 crew. Survivors abandoned ship and were rescued by the shrimpers Defender, Pioneer and Viscali (all 🇺🇸 United States). William C. McTarnahan was taken in tow by ST Baranca (🇺🇸 United States) and USS Tuckahoe (WYT-89) . She was subsequently repaired and returned to service in 1943 as St. James.

15 May

 * SS Kupa ( undefined): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean (14.83333°N, -52.33333°W) by GS U-156 (1941) with the loss of two of her 70 crew.
 * GERMAN MINESWEEPER M-26 : World War II: The minesweeper was bombed and sunk by aircraft off Cap de La Hague, France.
 * GERMAN TORPEDO BOAT Seeadler : World War II: The torpedo boat was torpedoed and sunk off Wimille, France (50.8°N, 1.53333°W).
 * SS Selje (1929) (🇳🇴 Norway): World War II: The cargo ship was bombed and sunk in the North Sea north of Terschelling, Friesland, Netherlands by Lockheed Hudson aircraft of 320 and 407 Squadrons, Royal Air Force with the loss of fourteen of the 62 people on board.
 * MS Siljestad (1927) (🇳🇴 Norway): World War II: The cargo ship was torpedoed and sunk north-east of Barbados by U-156 ( with the loss of two of her 33 crew.
 * SS Toyohara Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Pacific Ocean off the coast of Honshū by USS Tuna (SS-203).
 * HMS Trinidad (46) : World War II: Convoy PQ 13: The Crown Colony-class cruiser was bombed and damaged in the Arctic Ocean by Junkers Ju 88 aircraft of the Luftwaffe. She was later scuttled by HMS Matchless (G52).
 * GERMAN PATROL BOAT V-2002 : World War II: The vorpostenboot was bombed and sunk in the North Sea off Terschelling by Lockheed Hudson aircraft of 320 and 407 Squadrons, RAF.

16 May

 * HMS MTB 338 (MTB338) : World War II: St Nazaire Raid: The exploded and burned at Trinidad.
 * SS Nicarao (🇺🇸 United States): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean north of the Bahamas (25.33333°N, -74.31667°W) by GS U-751 with the loss of eight of her 39 crew. Survivors were rescued by SS Esso Augusta (🇺🇸 United States).

17 May

 * SS Barrdale (🇬🇧 United Kingdom): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean (15.25°N, -52.45°W) by GS U-156 (1941) with the loss of one of her 53 crew. The 52 survivors were rescued by SS Rio Iguazu (🇦🇷 Argentina) and landed at Recife, Brazil.
 * MV Beth (1930) (🇳🇴 Norway): World War II: The tanker was torpedoed and sunk in the Caribbean Sea 135 nmi east south east of Barbados (11.8°N, -57.53333°W) by GS U-162 with the loss of one of her 31 crew.
 * MV Challenger (1918) (🇺🇸 United States): World War II: The cargo ship was torpedoed and sunk in the Caribbean Sea (12.18333°N, -61.3°W) by GS U-155 (1941) with the loss of eight of the 64 people on board. Survivors were rescued by USS Turquoise (PY-18).
 * Foam (🇺🇸 United States): The trawler was shelled and sunk in the Atlantic Ocean 85 nmi south of Halifax, Nova Scotia, Canada (43.33333°N, -63.13333°W) by GS U-432 with the loss of one of her 21 crew. Survivors either reached the Sambro Lightship (🇨🇦 Canada) in their lifeboats or were rescued by HMCS Halifax (K237).
 * SS Fort Qu'Apelle (🇬🇧 United Kingdom): World War II: The Fort ship was torpedoed and sunk in the Atlantic Ocean (59.83333°N, -63.5°W) by GS U-135 (1941) with the loss of fourteen crew. Survivors were rescued by HMCS Melville (J263).
 * SS Gulfoil (🇺🇸 United States): World War II: The tanker was torpedoed and sunk in the Gulf of Mexico 75 nmi south west of the mouth of the Mississippi River (28.13333°N, -89.76667°W) by GS U-506 with the loss of 21 of her 40 crew. Survivors were rescued by SS Benjamin Brewster (🇺🇸 United States).
 * I-28 : World War II: The B1-class submarine was torpedoed and sunk in the Pacific Ocean off Truk, South Pacific Mandate (6.5°N, 152°W) by USS Tautog (SS-199) with the loss of all 88 crew.
 * I-164 : World War II: The Kaidai IV-class submarine was torpedoed and sunk in the Pacific Ocean off Kyūshū (29.41667°N, 134.15°W) by USS Triton (SS-201).
 * MV Peisander (🇬🇧 United Kingdom): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean 350 nmi off Nantucket Island, Massachusetts, United States (37.4°N, -65.63333°W) by GS U-653 . All 65 crew were rescued by USCGC General Greene (WPC-140).
 * SS Ruth Lykes (🇺🇸 United States): World War II: The cargo ship was torpedoed, shelled and sunk in the Caribbean Sea (16.61667°N, -82.45°W) by GS U-103 (1940) with the loss of six of the 36 people on board. Survivors were rescued by MV Somerville (🇳🇴 Norway).
 * SS San Victorio (🇬🇧 United Kingdom): World War II: The cargo ship was torpedoed and sunk in the Caribbean Sea (11.66667°N, -62.55°W) by GS U-155 (1941) with the loss of 52 of the 53 people on board. The ship was on her maiden voyage. The survivors was rescued by USS Turquoise (PY-18).
 * SS Skottland (Zaltbommel, 1919) (🇳🇴 Norway): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean (43.1°N, -67.33333°W by GS U-588 with the loss of one of her 24 crew. Survivors were rescued by the fishing vessel O. K. Service IV (🇨🇦 Canada).
 * SS Tajan Maru (🇯🇵 Japan): World War II: The cargo liner was torpedoed and sunk in the South China Sea off Indochina by USS Skipjack (SS-184).

18 May

 * SS Fauna (🇳🇱 Netherlands): World War II: The cargo ship was torpedoed and sunk in the Caicos Passage (22.16667°N, -72.5°W) by GS U-558  with the loss of two of her 29 crew.
 * SS Mercury Sun (🇺🇸 United States): World War II: The tanker was torpedoed and sunk in the Caribbean Sea 125 nmi south of Cape Corrientes, Cuba (20.01667°N, -84.43333°W) by GS U-125 (1940) with the loss of six of her 35 crew. Survivors were rescued by SS Howard (1895) (🇺🇸 United States).
 * SS Quaker City (🇺🇸 United States): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean 300 nmi east of Barbados (15.78333°N, -53.2°W) by GS U-156 (1941) with the loss of eleven of her 40 crew. Survivors were rescued by USS Blakeley (DD-150)  or reached land in their lifeboats.
 * SS William J. Salman (🇺🇸 United States): World War II: The cargo ship was torpedoed and sunk in the Caribbean Sea 125 nmi south of Cape Frances, Cuba (20.13333°N, -83.76667°W) by GS U-125 (1940) with the loss of six of her 28 crew. Survivors were rescued by SS Kegums (🇱🇻 Latvia).

19 May

 * SS Commandate Lyra (🇧🇷 Brazil): World War II: The cargo ship was torpedoed and damaged in the Atlantic Ocean by a Kriegsmarine U-boat and was abandoned be her crew, who were rescued by USS Milwaukee (CL-5) and USS Moffett (DD-362) (both ). A salvage party from USS Omaha (CL-4) was placed on board and the ship was towed to Fortaleza by USS Thrush (AM-18) (.
 * SS Heredia (🇺🇸 United States): World War II: The refrigerated cargo ship was torpedoed and sunk in the Gulf of Mexico 2 nmi south east of the Ship Shoal Buoy, Louisiana (28.88333°N, -91.05°W) by GS U-506 with the loss of 36 of her 62 crew. Survivors were rescued by the shrimpers Conquest, J. Edwin Treakle, Papa Joe, Shellwater (all 🇺🇸 United States) and an aircraft.
 * USS Isabela (SP-1035) (🇺🇸 United States): World War II: The cargo ship was torpedoed and sunk in the Caribbean Sea 35 nmi south of the Navassa Island Lighthouse (17.83333°N, -75°W) by GS U-751 with the loss of three of her 37 crew.
 * SS Ogontz (🇺🇸 United States): World War II: The cargo ship was torpedoed and sunk in the Gulf of Mexico 70 nmi south east of Cozumel, Mexico (23.5°N, -86.61667°W) by GS U-103 (1940) with the loss of nineteen of her 41 crew. Survivors were rescued by SS Esso Dover (🇺🇸 United States).

20 May

 * MV Darina (🇬🇧 United Kingdom): World War II: The tanker was torpedoed and sunk in the Atlantic Ocean 500 nmi south east of Bermuda (29.28333°N, -54.41667°W) by GS U-158 (1941) with the loss of six of her 56 crew. Survivors were rescued by SS British Ardour (🇬🇧 United Kingdom), MV Dagrun (🇳🇴 Norway) and SS Exanthia (🇺🇸 United States).
 * SS Eocene (🇬🇧 United Kingdom): World War II: Convoy AT 46: The tanker was torpedoed and sunk in the Mediterranean Sea off Sollum, Egypt (31.93333°N, 25.23333°W) by GS U-431 . All 43 people on board were rescued by HMT Cocker.
 * SS George Calvert (MC Hull 29) (🇺🇸 United States): World War II: The Liberty ship was torpedoed and sunk in the Caribbean Sea off Cuba (22.83333°N, -84.5°W) by GS U-753 with the loss of three of her 51 crew.
 * SS Halo (1920) (🇺🇸 United States): World War II: The tanker was torpedoed and sunk in the Gulf of Mexico (28.7°N, -90.13333°W) by GS U-506 with the loss of 39 of her 42 crew. Survivors were rescued by SS Oaxaca (🇲🇽 Mexico) and MV Otina (🇬🇧 United Kingdom).
 * MV Kattegat (1936) (🇳🇴 Norway): World War II: The cargo ship was shelled and sunk in the South Atlantic (-28.18333°N, -11.5°W) by GERMAN AUXILIARY CRUISER Michel . All 32 crew were taken on board Michel as prisoners of war.
 * MV Norland (1941) (🇳🇴 Norway): World War II: Convoy ON 93: The tanker was torpedoed, shelled and sunk in the Atlantic Ocean (31.36667°N, -55.78333°W) by GS U-108 (1940) . All 48 crew were rescued by MV Polyphemus (🇳🇱 Netherlands) and USS PT-453 (.
 * SS Sylvan Arrow (🇵🇦 Panama): World War II: Convoy OT 1: The tanker was torpedoed and damaged in the Caribbean Sea (11.41667°N, -62.3°W) by GS U-155 (1941) with the loss of one of her 44 crew. Survivors were rescued by USS Barney (DD-419) . Sylvan Arrow was taken in tow, but sank on 21 May at 12.83333°N, -67.53333°W.
 * SS Vestra (1904) (🇳🇴 Norway): World War II: The cargo ship struck a mine and sank in the Skagerrak off the Falsterbo Lighthouse, Sweden. She was salvaged, repaired and returned to service.
 * USS YP-87 :World War II: The Yard Patrol Craft was sunk in a collision off Delaware.

21 May

 * SS Clare (🇬🇧 United Kingdom): World War II: The cargo ship was torpedoed and sunk in the Caribbean Sea 40 nmi off Cuba (21.58333°N, -84.71667°W) by GS U-103 (1940) . All 40 crew survived, some reached land in their lifeboat, others were rescued from their liferafts by a Cuban gunboat.
 * SS Elizabeth (Standard, 1918) (🇺🇸 United States): World War II: The cargo ship was torpedoed and sunk in the Caribbean Sea 30 nmi south of Cape Corrientes, Cuba by GS U-103 (1940) with the loss of six of her 42 crew.
 * SS Faja de Oro (🇲🇽 Mexico): World War II: The tanker was torpedoed and sunk in the Gulf of Mexico by U-106 with the loss of 10 of her 31 crew.
 * RFA Montenol : World War II: Convoy OS 28: The tanker was torpedoed and damaged in the Atlantic Ocean 140 nmi east south east of off Santa Maria Island, Azores, Portugal (36.68333°N, -22.75°W) by GS U-159 (1941) with the loss of three of her 64 crew. Survivors were rescued by HMS Woodruff (K53) and  the ship was scuttled by HMS Wellington (L65) (both ).
 * SS New Brunswick (🇬🇧 United Kingdom): World War II: Convoy OS 28: The cargo ship was torpedoed and sunk in the Atlantic Ocean 140 nmi east south east of Santa Maria Island (36.88333°N, -22.91667°W by GS U-159 (1941) with the loss of three of her 62 crew. Survivors were rescued by SS Inchaga (🇬🇧 United Kingdom), HMS Totland (Y88), HMS Wellington (L65), HMS Weston (L84) and HMS Woodruff (K53) (all ).
 * SS Presidente Trujillo (🇩🇴 Dominican Republic): World War II: The cargo ship was torpedoed and sunk in the Caribbean Sea off Fort-de-France, Martinique (14.63333°N, -61.18333°W) by GS U-156 (1941) with the loss of 24 of her 39 crew.
 * SS Torondoc (🇨🇦 Canada): World War II: The cargo ship was torpedoed and sunk in the Caribbean Sea 60 nmi north west of Martinique (14.75°N, -62.25°W) by GS U-69 (1940) with the loss of all 21 crew.
 * SS Troisdoc (🇨🇦 Canada): World War II: The cargo ship was torpedoed, shelled and sunk in the Caribbean Sea (18.25°N, -79.33333°W) by GS U-558 . All eighteen crew were rescued by USCGC Mohawk (WPG-78).

22 May

 * SS Frank B. Baird (🇨🇦 Canada): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean (28.05°N, -58.83333°W) by GS U-158 (1941) . All 23 crew were rescued by MV Talisman (1937) (🇳🇴 Norway).
 * SS Plow City (🇺🇸 United States): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean 200 nmi off Cape May, New Jersey (38.88333°N, -69.95°W) by GS U-588 with the loss of one of her 31 crew. Survivors were rescued by USS Sapphire (PYc-2).

23 May

 * SS Asuncion (1921) (🇩🇪 Germany): World War II: The cargo ship struck a mine and sank off the coast of Norway.
 * SS Margot (1926) (🇬🇧 United Kingdom): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean south east of Philadelphia, Pennsylvania (approximately 39°N, -68°W) by GS U-588 with the loss of one of her 45 crew. Survivors were rescued by MV Sagoland (🇸🇪 Sweden).
 * SS Samuel Q. Brown (🇺🇸 United States): World War II: The tanker was torpedoed and damaged in the Caribbean Sea 100 nmi south of Cape Corrientes, Cuba (20.25°N, -84.61667°W) by GS U-103 (1940) with the loss of two of her 55 crew. Five injured crew were rescued by a United States Navy aircraft based at Upham, Canal Zone. the rest of the survivors were rescued on 25 May by USS Goff (DD-247), which scuttled the ship.
 * SS Watsonville (🇵🇦 Panama): World War II: The cargo ship was torpedoed and sunk in Saint Vincent Passage (13.2°N, -61.33333°W) by GS U-155 (1941) . All crew survived.
 * USS YP-277 :World War II: The Yard Patrol Craft struck a mine, burned and sank at French Frigate Shoals.
 * SS Zurichmoor (🇬🇧 United Kingdom): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean 400 nmi east of Philadelphia, Pennsylvania, United States (39.5°N, -66°W) by GS U-432 with the loss of all 45 crew.

24 May

 * SS Bør (Tønsberg, 1918) (🇳🇴 Norway): World War II: The coaster struck a mine and sank in the North Sea off the coast of the Netherlands (53.3°N, 1.15°W). Seventeen crew were rescued by SS Kong Sigurd (🇳🇴 Norway).
 * SS Chefak (🇹🇷 Turkey): World War II: The coaster was torpedoed and sunk in the Black Sea off Cape Vassilicos.
 * SS Gonçalves Dias (🇧🇷 Brazil): World War II: The Design 1022 cargo ship was torpedoed and sunk in the Caribbean Sea 100 nmi south of Ciudad Trujillo, Dominican Republic (16.15°N, -70°W) by GS U-502 with the loss of six of her 45 crew.
 * MV Hector (1939) (🇳🇱 Netherlands): World War II: The cargo ship was torpedoed and sunk in the Caribbean Sea 60 nmi north west of Grand Cayman (19.83333°N, -81.88333°W) by GS U-103 (1940) with the loss of two of her 31 crew. Survivors were rescued by SS F. Q. Barstow (🇺🇸 United States).

25 May

 * JAPANESE BATTLESHIP Asahi : World War II: The submarine tender was torpedoed and sunk in the South China Sea (10°N, 110°W) by USS Salmon (SS-182) with the loss of sixteen of her 599 crew.
 * SS Beatrice (1917) (🇺🇸 United States): World War II: The cargo ship was torpedoed and sunk in the Caribbean Sea (17.35°N, -76.11667°W) by GS U-558 with the loss of one of her 31 crew. Survivors were rescued by HMT Hauken  or reached land in their lifeboat.
 * SS Kitakata Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Pacific Ocean off Japan by USS Drum (SS-228).
 * MV Persephone (🇵🇦 Panama): World War II: The tanker was torpedoed and damaged in the Atlantic Ocean off the Barnegat Lighthouse, New Jersey, United States (39.73333°N, -73.88333°W) by GS U-593 with the loss of nine of her 37 crew. She broke in two and sank at 46.25°N, -74.03333°W. The bow section was salvaged and her cargo recovered. The stern section was dispersed by the United States Coast Guard as it was a hazard to navigation.
 * SS Shoka Maru : World War II: The Transport was torpedoed and sunk in the Pacific Ocean 190 miles south of Woleai by USS Tautog (SS-199) . 2 crewmen killed, 63 survivors.
 * SS Tokyo Maru (🇯🇵 Japan): World War II: The tanker was torpedoed and sunk in the East China Sea by USS Pompano (SS-181).

26 May

 * SS Alcoa Carrier (🇺🇸 United States): World War II: The cargo ship was torpedoed, shelled and sunk in the Caribbean Sea 125 nmi north west of Montego Bay, Jamaica (18.75°N, -79.83333°W) by GS U-103 (1940) . All 35 crew were rescued by a Cuban gunboat and a United States Navy aircraft.
 * SS Carrabulle (🇺🇸 United States): World War II: The Design 1022 tanker was torpedoed and sunk in the Gulf of Mexico (26.3°N, -89.35°W) by GS U-106 (1940) with the loss of 22 of her 40 crew. Survivors were rescued by SS Thomson Lykes (🇺🇸 United States).
 * SS Kagi Maru (🇯🇵 Japan): World War II: The transporrt ship was torpedoed and sunk in the Pacific Ocean north of the Amami Islands (28.81667°N, 129.66667°W) by USS Saury (SS-189).
 * SS Syros (🇺🇸 United States): World War II: Convoy PQ 16: The cargo ship was torpedoed and sunk in the Norwegian Sea 200 nmi south west of Bear Island (72.58333°N, 5.5°W) by GS U-703 with the loss of eleven of her 39 crew. Survivors were rescued by HMS Hazard (J02).
 * MV Vardø (1938) (🇳🇴 Norway): World War II: The coaster was shelled and sunk at Murmansk, Soviet Union by land-based artillery.

27 May

 * Alamar (🇺🇸 united states): Convoy PQ 16: The 5,915 grt freighter was attacked and sunk by German aircraft 100 nmi east of Bear Island. No casualties
 * HMT Arctic Pioneer (FY164) : World War II: The Naval Trawler was bombed and sunk in Cowes Roads, outside Portsmouth Harbor, by Ju 87 Stuka dive bombers. 17 crewmen killed, 16 survivors.
 * MV Athelknight (🇬🇧 United Kingdom): World War II: The tanker was torpedoed and sunk in the Atlantic Ocean (27.83333°N, -46°W) by GS U-172 with the loss of nine of her 54 crew. Survivors were rescued by SS Empire Austen (🇬🇧 United Kingdom) or reached land in their lifeboats.
 * SS Empire Lawrence (🇬🇧 United Kingdom): World War II: Convoy PQ 16: The CAM ship was bombed and sunk in the Barents Sea east of Bear Island, Norway by Luftwaffe aircraft.
 * SS Empire Purcell (🇬🇧 United Kingdom): World War II: Convoy PQ 16: The cargo ship was bombed and sunk in the Barents Sea (74°N, 26.13333°W) by Luftwaffe aircraft.
 * HMS Fitzroy (J03) : World War II: The Hunt class minesweeper struck a mine and sank in the North Sea off Great Yarmouth, Norfolk with the loss of thirteen crew.
 * MV Hamlet (1934) 🇳🇴 Norway): World War II: The tanker was torpedoed and sunk in the Atlantic Ocean (28.41667°N, -91°W) by GS U-753 . All 36 crew survived.
 * USAT Jack : World War II: The Design 1093 cargo ship was torpedoed and sunk in the Caribbean Sea 100 nmi south west of Port Salut, Haiti (17.6°N, -74.7°W) by GS U-558 with the loss of 37 of her 60 crew. Survivors were rescued by USS Grunion (SS-216).
 * Lowther Castle ( undefined): Convoy PQ 16: The 5,171 grt freighter was sunk by German torpedo bombers.
 * Mormacsul (🇺🇸 united states): Convoy PQ 16: The 5,481 grt freighter was sunk by German aircraft on a voyage from Philadelphia to northern Russia. She sank off North Cape
 * MV Polyphemus (🇳🇱 Netherlands): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean 340 nmi north east of Bermuda (38.2°N, -63.36667°W) by GS U-578 with the loss of fifteen of the 75 people on board, but none of the survivors from MV Norland (🇳🇴 Norway) that were on board. Survivors were rescued by SS Maria Amelia (🇵🇹 Portugal) or reached land in their lifeboats.

28 May

 * SS Alcoa Pilgrim (🇺🇸 United States): World War II: The Type C1 cargo ship was torpedoed and sunk in the Caribbean Sea 150 nmi south of the Mona Passage (16.46667°N, -67.61667°W) by GS U-502 with the loss of 31 of her 40 crew. Survivors were rescued by SS Thomas Nelson (🇬🇧 United Kingdom).
 * City of Joliet (🇺🇸 United States): Convoy PQ 16: The freighter was sunk by German torpedo bombers.
 * SS Ganges Maru (🇯🇵 Japan): World War II: The cargo liner was torpedoed and sunk in the South China Sea by USS Salmon (SS-182).
 * SS New Jersey (1921) (🇺🇸 United States): World War II: The cargo ship was torpedoed and sunk in the Caribbean Sea 90 nmi south west of Grand Cayman (18.53333°N, -82.46667°W) by GS U-103 (1940) . All 42 crew were rescued by USS Biddle (DD-151) and USS Tattnall (DD-125) (both ).
 * SS Poseidon (1921) (🇳🇱 Netherlands): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean (14.58333°N, -58.31667°W) by GS U-155 (1941) with the loss of all 32 crew.
 * GERMAN MINESWEEPER Sperrbrecher 174 : World War II: The sperrbrecher struck a mine and sank in the North Sea west of Dunquerque, Nord, France.
 * SS Yorkmoor (🇬🇧 United Kingdom): World War II: The cargo ship was shelled and sunk in the Atlantic Ocean (29.90833°N, -72.425°W) by GS U-506 . All 45 crew were rescued by MV Laguna (🇬🇧 United Kingdom and a United States Coast Guard cutter.

29 May

 * SS Allister (🇬🇧 United Kingdom): World War II: The cargo ship was torpedoed and sunk in the Caribbean Sea 54 nmi south of Grand Cayman (18.38333°N, -81.21667°W) by GS U-504 with the loss of fifteen of her 23 crew.
 * SS Norman Prince (🇬🇧 United Kingdom): World War II: The cargo ship was torpedoed and sunk in the Caribbean Sea 60 nmi west of Saint Lucia (14.66667°N, -62.25°W) by GS U-156 (1941) with the loss of sixteen of her 43 crew. Survivors were rescued by SS Angoulême (🇫🇷 France) and USCGC Unalga (WPG-53).
 * SS Tatsufuku Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk at the south west entrance to the Balabac Strait (7.55°N, 116.3°W) by USS Seal (SS-183).
 * GS U-568 : World War II: The Type VIIC submarine was depth charged and sunk in the Mediterranean Sea north east of Tobruk, Libya by HMS Eridge (L68), HMS Hero (H99) and HMS Hurworth (L28) (all ). All 47 crew survived.
 * SS Western Head (🇬🇧 United Kingdom): World War II: The cargo ship was torpedoed and sunk in the Windward Passage 50 nmi east of Guantanamo Bay, Cuba (19.95°N, -74.3°W) by GS U-107 (1940) with the loss of 24 of her 30 crew. Survivors were rescued by a United States Navy vessel.

30 May

 * SS Alcoa Shipper (🇺🇸 United States): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean 500 nmi east of Cape Charles, Virginia (37.81667°N, -65.25°W) by GS U-404 with the loss of seven of her 32 crew. Survivors were rescued by SS Margarethe Bakke (🇳🇴 Norway).
 * SS Atsuta Maru (🇯🇵 Japan): World War II: The transport ship was torpedoed and sunk in the Pacific Ocean by USS Pompano (SS-181).
 * MV Baghdad (1936) (🇳🇴 Norway): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean (14.25°N, -54.5°W) by GS U-155 (1941) with the loss of nine of her 30 crew.
 * MV British Loyalty (🇬🇧 United Kingdom): World War II: The tanker was torpedoed and sunk at Diego Suarez, Madagascar by the midget submarine M-20b with the loss of six crew. She was salvaged in December 1942, repaired and used as a hulk at Addu Atoll, Maldives from March 1943 until the end of the war.
 * SS George Clymer (🇺🇸 United States): World War II: The Liberty ship was torpedoed and damaged in the Atlantic Ocean by a motor torpedo boat launched from GERMAN AUXILIARY CRUISER Michel . She was later scuttled at -14.53333°N, -20.51667°W by HMS Alcantara (F88).
 * MV Mentor (🇬🇧 United Kingdom): World War II: The cargo ship was torpedoed and sunk in the Gulf of Mexico by GS U-106 (1940) with the loss of four of her 86 crew. Survivors were rescued by SS Antilochus (🇬🇧 United Kingdom).

31 May

 * RFA Dinsdale : World War II: The Landing Ship, Gantry / tanker was torpedoed and sunk in the Atlantic Ocean north east of Pernmambuco, Brazil (-0.75°N, -29.83333°W) by ITALIAN SUBMARINE Cappellini whilst on her maiden voyage.
 * SS Fred W. Green (🇬🇧 United Kingdom): World War II: The derrick ship was torpedoed and sunk in the Atlantic Ocean 200 nmi north east of Bermuda (30.33333°N, -62°W) by GS U-506 with the loss of five of her 46 crew. Survivors were rescued by USS Ludlow (DD-438).
 * USAT Jack : World War II: The transport ship was torpedoed and sunk in the Caribbean Sea 100 nmi south west of Port Salut, Haiti (17.6°N, -74.7°W) by GS U-558 with the loss of 37 of the 60 people on board. Fourteen of the survivors were rescued by USS Grunion (SS-216).
 * HMAS Kuttabul (ship) : World War II: Attack on Sydney Harbour: The depot ship was torpedoed and sunk in Sydney Harbour by M-24 with the loss of 21 crew.
 * SS Liverpool Packet (🇨🇦 Canada): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean 15 nmi west of Seal Island, Nova Scotia (43.33333°N, -66.33333°W) by GS U-432 with the loss of two of her 21 crew.
 * M-14, M-21 and M-24 (all ): World War II: Attack on Sydney Harbour: The Type A Ko-hyoteki-class submarines were all lost during the attack with the loss of all six crew.

Unknown date

 * SS Tai Shan (🇳🇴 Norway): The cargo ship sank at Liverpool, Lancashire some time after 15 May, when she had arrived with Convoy HX 188. Subsequently repaired and returned to service.