List of shipwrecks in September 1944

The list of shipwrecks in September 1944 includes ships sunk, foundered, grounded, or otherwise lost during September 1944.

1 September

 * MV Aura (🇳🇴 Norway): World War II: The coaster struck a mine and sank at Lepsørev, Møre og Romsdal.
 * HMS Hurst Castle (K416) : World War II: The Castle-class corvette was torpedoed and sunk in the Atlantic Ocean off Tory Island, County Donegall, Ireland (55.45°N, -8.2°W) by GS U-482 with the loss of seventeen of her 124 crew. Survivors were rescued by HMS Ambuscade (D38).
 * HMS MMS 117 (J617) : World War II: The MMS1-class minesweeper was sunk by a mine off Civita Vecchia, Italy.
 * SS Oituz (🇷🇴 Romania): World War II: The cargo ship was torpedoed and sunk at Constanţa by GS U-23 (1936). Later refloated but declared a total loss.
 * SS Troilus (🇬🇧 United Kingdom): World War II: The cargo ship was torpedoed and sunk in the Arabian Sea 300 nmi north east of Socotra Island, South Yemen (14.16667°N, 61.06667°W) by GS U-859 with the loss of six of the 101 people on board. Survivors were rescued by HMS Nadder (K392) and HMS Taff (K637) (both ).
 * UIT-19 : World War II: The Ex-Italian Flutto-class submarine was bombed and sunk at Pola, Italy by the R.A.F.
 * GS U-247 : World War II: The Type VIIC submarine was depth charged and sunk in the English Channel (49.9°N, -5.81667°W) by HMCS Saint John (K546) and HMCS Swansea (K328) (both ) with the loss of all 52 crew.
 * USS YMS-21 (YMS-21) : The YMS-1-class Minesweeper was sunk by a mine off Toulon, France (43.1°N, 5.9°W).

2 September

 * SOVIET MINESWEEPER BTSC-410 Vzryv :World War II: The minesweeper was torpedoed and sunk in the Black Sea (43.25°N, 29.2°W) by GS U-19 (1936).
 * SS Empire Curzon (🇬🇧 United Kingdom): The cargo ship was driven ashore in the Seine Bay in gales. She struck the wreck of SS Iddesleigh (🇬🇧 United Kingdom). She was later refloated and towed to the United Kingdom. Declared a constructive total loss, she was laid up until December 1945 and then scrapped.
 * SS Miyakawa Maru No.2 (🇯🇵 Japan): World War II: The coaster was torpedoed and sunk in the Sea of Japan by USS Guardfish (SS-217).
 * U-394 : World War II: The Type VIIC submarine was sunk in the Norwegian Sea south east of Jan Mayen, Norway (69.78333°N, 4.16667°W by a Fairey Swordfish aircraft of 825 Squadron, Fleet Air Arm, based on HMS Vindex (D15) and depth charges and gunfire from HMS Keppel (D84), HMS Mermaid (U30), HMS Peacock (U96) and HMS Whitehall (D94) (all ).

3 September

 * SS Fjordheim (1930) (🇳🇴 Norway): World War II: Convoy ON 251: The cargo ship was torpedoed and sunk in the Atlantic Ocean (55.33333°N, -9.96667°W) by GS U-482 with the loss of three of her 38 crew. Survivors were rescued by SS Empire Mallory (🇬🇧 United Kingdom) and HMCS Montreal (K319).
 * SS Livingston (🇬🇧 United Kingdom): World War II: The cargo ship was torpedoed and sunk north east of Louisburg, Nova Scotia, Canada (46.25°N, -58.08333°W) by GS U-541 with the loss of fourteen of her 28 crew. Survivors were rescued by HMCS Barrie (K138).

4 September

 * MV Grenadier (🇧🇪 Belgium): World War II: The cargo ship was scuttled in the Scheldt by German Forces. She was raised on 19 February 1945 and completed as Armand Grisar.
 * MV Musketier (🇧🇪 Belgium): World War II: The uncompleted tanker was scuttled in the Scheldt at Antwerp by German Forces. She was raised on 13 April 1945 and completed in 1949 as Gouvernor Galpin.
 * UIT-15 : World War II: The Ex-Italian Flutto-class submarine was bombed and sunk at Genoa, Italy by the R.A.F.
 * UIT-16 : World War II: The Ex-Italian Flutto-class submarine was bombed and sunk at Genoa, Italy by the R.A.F.
 * UIT-20 : World War II: The Ex-Italian Flutto-class submarine was bombed and sunk at Genoa, Italy by the R.A.F.
 * Yard No 694, John Cockerill SA (🇧🇪 Belgium): World War II: The uncompleted tanker was scuttled at Hoboken, Antwerp by German Forces. She was raised on 6 December 1945 and completed in 1949 as MV Belgian Pride.
 * Yard No 695, John Cockerill SA (🇧🇪 Belgium): World War II: The uncompleted tanker was scuttled at Hoboken by German Forces. She was raised on 27 December 1944 and completed in April 1946 as MV Stavelot.
 * Yard No 696, John Cockerill SA (🇧🇪 Belgium): World War II: The uncompleted cargo ship was scuttled at Hoboken by German Forces. She was raised on 12 November 1944 and completed in 1946 as MV Houffalize.

5 September

 * SS Ioannis Fafalion (🇬🇷 Greece): World War II: The cargo ship was torpedoed and sunk in the Indian Ocean 300 nmi north east of Mombasa, Kenya (-4.33333°N, 43.95°W) by GS U-861 with the loss of eight of her 33 crew.
 * SS Kokka Maru (🇯🇵 Japan): World War II: Convoy TAMO-25: The Type 1K Ore Carrier ran aground leaving Keelung Harbor, refloated later in the day and returned to port. Sunk by a mine in Keelung Harbor on the 5th or 7th. (25.2°N, 121.75°W).
 * GERMAN MINESWEEPER M-274 : World War II: The minesweeper was scuttled off Doel, Belgium.
 * GERMAN MINESWEEPER M-274 : World War II: The minesweeper was scuttled in the Scheldt estuary, Belgium.
 * SS Shonan Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Pacific Ocean by USS Seal (SS-183).
 * GS U-362 : World War II: The Type VIIC submarine was depth charged and sunk in the Kara Sea off Krakovka, Soviet Union (75.85°N, 89.45°W) by SOVIET MINESWEEPER T-116 with the loss of all 51 crew.

6 September

 * SS Breda (1915) (🇩🇪 Germany): World War II: The cargo ship was torpedoed and sunk in the North Sea off Emden, Lower Saxony by Bristol Beaufighter aircraft of 455 Squadron, Royal Australian Air Force and 489 Squadron, Royal New Zealand Air Force with the loss of twelve lives.
 * SS Eiji Maru (🇯🇵 Japan): World War II: Convoy TAMA-25: The cargo ship was sunk by a mine off the south west coast of Formosa.(22.31667°N, 120.5°W). 611 troops and 6 crewmen killed.
 * Norderney II (🇩🇪 Germany): World War II: The lightship was torpedoed and sunk in the North Sea off Emden by Bristol Beaufighter aircraft of 455 Squadron RAAF and 478 Squadron RNZAF.
 * SS Rosafred (1921) (🇸🇪 Sweden): World War II: The cargo ship was torpedoed and sunk by aircraft off Roter Sand, Germany

7 September

 * SS Eiyo Maru No. 2 : World War II: Convoy C-076: The Oiler was torpedoed and damaged in the Sulu Sea off Mindanao by USS Paddle (SS-263) . Towed to Sindugon Point, Cebu (8.16667°N, 122.66667°W) and beached on the 9th, declared damaged beyond repair. Bombed and sunk 12 September. 2 passengers  and 43 crew killed.
 * SS John C. Calhoun (🇺🇸 United States): The Liberty ship was damaged at Finschhafen, Papua New Guine by the explosion of her cargo. She was declared a constructive total loss.
 * SS Shinyo Maru (🇯🇵 Japan): World War II: Convoy C-076: The cargo ship was torpedoed and sunk in the Sulu Sea off Mindanao by USS Paddle (SS-263) while carrying US P.O.W.s. 667 US P.O.W.s, 47 Guards and 15 crew killed.
 * SS Westfalen (1905) : World War II: The ship sank in the Skagerrak off Marstrand, Västra Götaland County, Sweden. Probable cause of loss was a mine.

8 September

 * SS Empire Heritage (🇬🇧 United Kingdom): World War II: Convoy HX 305: The tanker was torpedoed and sunk in the Atlantic Ocean north north east of Tory Island, County Donegall, Ireland (55.45°N, -8.01667°W) by GS U-482 with the loss of 112 of the 163 people on board. Survivors were rescued by HMT Northern Wave (FY153)   and MV Pinto (🇬🇧 United Kingdom).
 * SS Kong Alf (🇳🇴 Norway): The coaster foundered in the Baltic Sea (57.19167°N, 12.07667°W). All crew were rescued by SS Fritiof (🇸🇪 Sweden). Later raised, repaired and returned to service.
 * SS Nichian Maru (🇯🇵 Japan): World War II: Convoy TAKA-808: The cargo ship was torpedoed and sunk in the East China Sea west north west of Ishigaki  (24.75°N, 123.33333°W) by USS Spadefish (SS-411) . 51 crewmen killed.
 * SS Nichiman Maru (🇯🇵 Japan): World War II: Convoy TAKA-808: The cargo ship was torpedoed and sunk in the East China Sea west north west of Ishigaki (24.75°N, 123.33333°W) by USS Spadefish (SS-411) . 53 crewmen killed.
 * MV Pinto (🇬🇧 United Kingdom): World War II: Convoy HX 305: The rescue ship was torpedoed and sunk in the Atlantic Ocean north north east of Tory Island (55.45°N, -8.01667°W) by GS U-482 with the loss of eighteen of the 59 people on board, including two survivors from SS Empire Heritage (🇬🇧 United Kingdom). Survivors were rescued by HMT Northern Wave (FY153) (.
 * SS Rex undefined): The ocean liner was bombed and sunk at Trieste, Friuli-Venezia Giulia by Bristol Beaufighter aircraft of the Royal Air Force. The wreck was raised and  scrapped post-war.
 * SS Ryuka Maru (🇯🇵 Japan): World War II: Convoy C-076: The Transport was torpedoed and sunk in the Sulu Sea off Mindanao (8.31667°N, 121.5°W) by USS Bashaw (SS-241) . 321 troops and 18 crew killed.
 * SS Shinten Maru (🇯🇵 Japan): World War II: Convoy TAKA-808: The cargo ship was torpedoed and sunk in the East China Sea west north west of Ishigaki (24.75°N, 123.33333°W) by USS Spadefish (SS-411) . 2 Gunners and 8 crewmen killed.
 * SS Shokei Maru : World War II: Convoy TAKA-808: The Transport was torpedoed and sunk in the East China Sea west north west of Ishigaki (24.75°N, 123.33333°W) by USS Spadefish (SS-411) . 2 crewmen killed.

9 September

 * Lerøy (🇳🇴 Norway): The cutter collided with SS Saude 🇳🇴 Norway) off Klokkarvik, Hordaland and sank. All seven people on board survived.
 * SS Manshu Maru (🇯🇵 Japan): World War II: Convoy TAMA-25: The cargo ship was torpedoed and sunk 43 miles north west of Calayan Island(19.75°N, 120.91667°W) by USS Queenfish (SS-393) . 900 troops and crewmen killed.
 * SS Shoryu Maru (🇯🇵 Japan): World War II: Convoy 3908: The cargo ship was torpedoed and sunk by USS Bang (SS-385) off Tateyama(28.96667°N, 137.75°W). 64 troops and 4 crewmen killed.
 * SS Tokiwasan Maru (🇯🇵 Japan): World War II: Convoy 3908: The cargo ship was torpedoed and sunk by USS Bang (SS-385) off Tateyama(28.96667°N, 137.75°W). 14 troops and 9 crewmen killed.
 * SS Toyooka Maru (🇯🇵 Japan): World War II: Convoy TAMA-25: The cargo ship was torpedoed and sunk 43 miles north west of Calayan Island(19.75°N, 120.91667°W) by USS Queenfish (SS-393) (. 1036 troops and 9 crewmen killed.
 * GS U-484 : World War II: The Type VIIC submarine was depth charged and sunk in the Atlantic Ocean north west of Ireland (55.75°N, -11.68333°W) by HMS Helmsdale (K253) and HMS Portchester Castle (K362) (both ) with the loss of all 52 crew.

10 September

 * SS Chihaya Maru (🇯🇵 Japan): World War II: Convoy MI-19: The Tanker was torpedoed and sunk in the Tsushima Strait east of Quelpart Island (33.65°N, 127.71667°W) by USS Sunfish (SS-281) . 76 troops and 9 crewmen killed.
 * GS U-20 (1936) : World War II: The Type IIB submarine was scuttled in the Black Sea (41.16667°N, 30.78333°W).
 * GS U-23 (1936) : World War II: The Type IIB submarine was scuttled in the Black Sea (41.18333°N, 30°W).

11 September

 * GERMAN TANKER Eurofeld : World War II: The replenishment oiler was scuttled at Saint-Nazaire, France. Wreck raised and scrapped in 1950.
 * SS Giulio Cesare : World War II: The hospital ship was bombed and sunk at Vallone di Zaule by Allied aircraft.
 * SS Hassho Maru (🇯🇵 Japan): World War II: Convoy 1910B : The cargo ship was attacked north of Chichi Jima by B-24s and damaged by near misses. She was scuttled by shelling by the convoy escorts.
 * GERMAN MINESWEEPER M-462 : World War II: The minesweeper was bombed and sunk by aircraft off Skagen, Denmark.
 * GS U-19 (1936) : World War II: The Type IIB submarine was scuttled in the Black Sea (41.56667°N, 31.83333°W).
 * SS Vang (🇳🇴 Norway): World War II: The coaster was torpedoed and sunk in the North Sea off Lista, Vest-Agder (58.05°N, 6.56667°W) by HMS Venturer (P68) . All crew survived.

12 September

 * JAPANESE ESCORT Hirado : World War II: Convoy HI-72: The frigate was torpedoed and sunk in the South China Sea south east of Hong Kong (17.9°N, 114.81667°W) by USS Growler (SS-215) . 107 crewmen including the C.O., plus Rear Admiral Kajioka, were killed.
 * SS Kachidoki Maru (🇯🇵 Japan): World War II: Convoy HI-72: The transport was torpedoed and sunk in the South China Sea south east of Hong Kong (19.41667°N, 112.38333°W) by USS Pampanito (SS-383) . The ship was carrying Australian and British prisoners of war, 431 P.O.W.s, 145 troops and 12 crewmen killed.
 * GERMAN MINESWEEPER M-426 : World War II: The minesweeper was bombed and sunk by aircraft off Kristiansand, Norway.
 * SS Nankai Maru : World War II: Convoy HI-72: The transport was torpedoed and sunk in the South China Sea 280 nmi south of Hong Kong (18.25°N, 114.35°W) by USS Sealion (SS-315) .196 troops and 3 crewmen killed.
 * SS Nichiei Maru : World War II: The transport was bombed and sunk in the Camotes Sea off Mactan Island, Philippines (10.33333°N, 124°W) by US Navy aircraft.
 * USS Noa (DD-343) : The High Speed Transport, a former Clemson-class destroyer, was rammed in the Pacific Ocean off Palau by USS Fullam (DD-474) and sank. All 150 crew were rescued by USS Fullam.
 * SS Rakuto Maru : World War II: The transport was bombed and sunk in the Camotes Sea off Cebu (10.33333°N, 124.33333°W) by US Navy aircraft. 170 troops and 29 crewmen killed.
 * SS Rakuyo Maru (🇯🇵 Japan): World War II: Convoy HI-72: The troopship was torpedoed and sunk in the South China Sea 280 nmi south of Hong Kong by USS Sealion (SS-315) . The ship was carrying Australian and British prisoners of war, 1,159 of the 1,318 POWs were killed in the sinking, 54 survivors were rescued by USS Sealion (SS-315), USS Queenfish (SS-393),  and USS Pampanito (SS-383) (all ) on the 15th, with four dying before they could be landed at Tanapag Harbor, Mariana Islands. 9 crewmen killed.
 * Schnelles Geleitboot 19 : World War II: The escort ship was bombed and sunk by aircraft.
 * JAPANESE DESTROYER Shikinami : World War II: Convoy HI-72: The Fubuki-class destroyer was torpedoed and sunk in the South China Sea 280 nmi south of Hong Kong (18.26667°N, 114.66667°W) by USS Growler (SS-215) with the loss of 91 of her 219 crew. Survivors rescued by JAPANESE ESCORT Mikura.
 * GERMAN PATROL BOAT V-5307 : World War II: The patrol boat was bombed and sunk by aircraft off Stad, Norway.
 * USS YMS-409 (YMS-409) : 1944 Great Atlantic hurricane: The YMS-1-class minesweeper foundered off the east coast of the US with all 33 hands.
 * SS Zuiho Maru (🇯🇵 Japan): World War II: Convoy HI-72: The transport was torpedoed and sunk with all hands in the South China Sea 280 nmi south of Hong Kong (19.41667°N, 112.38333°W) by USS Pampanito (SS-383).

13 September

 * JAPANESE SUBMARINE CHASER CH-55 : World War II: The  was bombed and sunk 3 miles north of Cebu (10.33333°N, 124°W) by US Navy aircraft.
 * SS Etashima Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Tsushima Strait by USS Sunfish (SS-281).
 * HMS MFV 1032 (MFV1032) : World War II: The MFV 1001-class Motor Fishing Boat sank in the western Mediterranean Sea while in tow.
 * USS Perry (DD-340) : World War II: The High Speed Minesweeper, a former Clemson-class destroyer, struck a mine and sank in the Pacific Ocean off Anguar, Palau. All 133 crew were rescued by USS Preble (DD-345).
 * USS Warrington (DD-383) : 1944 Great Atlantic hurricane: The Somers-class destroyer foundered in the Atlantic Ocean 450 nmi off Vero Beach, Florida with the loss of 248 of her 321 crew.

14 September

 * USCGC Bedloe (WSC-128) : 1944 Great Atlantic hurricane: The Active-class patrol boat foundered in Oregon Inlet North Carolina.
 * SS Irene Oldendorff ( Nazi Germany): World War II: The uncompleted cargo ship was sunk at Copenhagen, Denmark by saboteurs. She was later repaired, completed and entered service.
 * USCGC Jackson (WPC-142) : 1944 Great Atlantic hurricane: The Active-class patrol boat foundered in Oregon Inlet, North Carolina.
 * HMS MMS 278 (J778) : World War II: The MMS 1-class Motor Minesweeper was wrecked off St. Malo, France.
 * SS Thomas Tracey (United States): 1944 Great Atlantic Hurricane: The cargo ship was driven ashore at Rehoboth Beach, Delaware and broke in two. All 31 crew were rescued.
 * NO.1 CLASS LANDING SHIP Transport No. 5 : World War II: The No.1-class Landing ship was bombed and sunk off Davao in the Gulf of Davao (6.16667°N, 126°W) by US Navy aircraft.
 *  Vinyard Sound Lightship : 1944 Great Atlantic hurricane: The lightship foundered in Vineyard Sound with the loss of all twelve crew.
 * USS YMS-409 : 1944 Great Atlantic hurricane: The minesweeper foundered in the Atlantic Ocean. All 33 crew were lost.

15 September
For the loss of RFA Brambleleaf on this day, see the entry for 10 June 1942.
 * NO.1 CLASS LANDING SHIP Transport No. 3 : World War II: The No.1-class Landing ship was torpedoed and sunk off Pagobas, Mindanao in the Gulf of Davao (5.58333°N, 125.4°W) by USS Guavina (SS-362).

16 September

 * JAPANESE SUBMARINE I-364 : World War II: The was torpedoed and sunk in the Pacific Ocean 250 miles east of the Boso Peninsula (34.5°N, 145.38333°W)  by USS Sea Devil (SS-400).
 * SS Ocean Honour (🇬🇧 United Kingdom): World War II: The Ocean ship was torpedoed and sunk in the Indian Ocean (12.8°N, 50.83333°W) by JAPANESE SUBMARINE I-29.
 * JAPANESE OILER Ogura Maru No. 2 : World War II: Convoy HI-74: The 1TL-class oiler (possibly named Kokura Maru No. 2) was damaged by the explosion of JAPANESE OILER Tokushima Maru  then she was torpedoed and sunk in the Bashi Channel (21.7°N, 121.68333°W) by USS Redfish (SS-395)  . 3 Guards, 23 passengers and 15 crewmen killed.
 * JAPANESE AUXILIARY TRANSPORT Tokushima Maru : World War II: Convoy HI-74: The transport was torpedoed, and blew up in the Bashi Channel (21.95°N, 121.58333°W), by USS Picuda (SS-382) . 50 Gunners, 82 passengers and 47 crewmen killed.

17 September

 * JAPANESE OILER Azusa Maru : World War II: Convoy HI-74: The 1TL-class oiler was torpedoed and sunk in the South China Sea 220 nmi south east of Hong Kong (19.13333°N, 116.55°W) by USS Barb (SS-220) . She blew up and sank with all hands.
 * GERMAN TORPEDO BOAT T-18 : World War II: The torpedo boat was sunk by rocket-armed aircraft at Paldiski, Estonia.
 * JAPANESE AIRCRAFT CARRIER Unyō : World War II: Convoy HI-74: The Taiyō-class escort carrier was torpedoed and sunk in the South China Sea 220 nmi south east of Hong Kong (19.13333°N, 116.6°W) by USS Barb (SS-220) with the loss of approximately 240 lives. A total of 761 people were rescued by JAPANESE ESCORT Chiburi and JAPANESE ESCORT CD-27 (both ).

18 September

 * SS Ampetco (🇧🇪 Belgium): The tanker collided with SS Punta Gorda (🇬🇧 United Kingdom) in the Caribbean Sea (12.25417°N, -70.075°W). Punta Gorda exploded and sank, setting Ampteco on fire. Ampetco was declared a constructive total loss. She was later sunk as target off Aruba.
 * SS Gyōkū Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Yellow Sea (35.03333°N, 124.4°W) by USS Thresher (SS-200).
 * SS Gyokurei Maru (🇯🇵 Japan): World War II: the cargo ship was torpedoed and sunk in the Yellow Sea (35.08333°N, 124.4°W) by USS Grayback (SS-208) (.
 * Junyō Maru (🇯🇵 Japan): World War II: The hell ship was torpedoed and sunk in the Indian Ocean off Sumatra, Dutch East Indies by HMS Tradewind with the loss of 5,620 of the 6,343 people on board.
 * JAPANESE AUXILIARY GUNBOAT Saigon Maru : World War II: The auxiliary Gunboat/Minelayer was torpedoed and sunk off Manila Bay (14.33333°N, 120.08333°W) by USS Flasher (SS-249) . 6 crewmen killed. Survivors rescued by JAPANESE DESTROYER Uzuki and JAPANESE DESTROYER Yuzuki (both ).

19 September

 * Isoshima : World War II: The Frigate (A.K.A. Isojima) was torpedoed and sunk in the Pacific Ocean off Honshu (33.66667°N, 138.33333°W) by USS Shad (SS-235).
 * JAPANESE SUBMARINE TENDER Jingei : World War II: The was torpedoed and her bow damaged by USS Scabbardfish (SS-397)  80 miles north west of Okinawa (27.58333°N, 127.11667°W). She was towed to Okinawa and beached.
 * USS LCI(G)-459 (LCT-459) : World War II: The LCI-1-class Landing Craft, Infantry(Guns) sank off Palau.
 * SS Lynx (1925) (🇳🇴 Norway): World War II: The cargo ship was bombed and sunk in the Norwegian Sea off Askvoll, Sogn og Fjordane by Allied aircraft.
 * USS PT-371 : World War II: The Vosper 70 foot-class PT Boat ran aground off Doitia Harbor, Halmahera Island and was scuttled.
 * SS Tyrifjord (🇳🇴 Norway): World War II: The cargo ship was bombed and sunk off the Stavenes Lighthouse, Møre og Romsdal by Allied aircraft.
 * GS U-407 : World War II: The Type VIIC submarine was depth charged and sunk in the Mediterranean Sea off Milos, Greece (36.45°N, 24.55°W) by ORP Garland (}, HMS Terpsichore (R33) and HMS Troubridge (R00) (both ) with the loss of five of her 53 crew.
 * GS U-565 : World War II: The Type VIIC submarine was bombed and damaged off Skaramangas, Greece (37.95°N, 23.66667°W) by American aircraft. She was consequently scuttled on 24 September off the Salamis Naval Base with the loss of five crew.
 * GS U-867 : World War II: The Type IXC/40 submarine was depth charged and sunk in the North Sea west of Bergen, Hordaland, Norway (62.25°N, 1.83333°W) by a Consolidated B-24 Liberator aircraft of 224 Squadron, Royal Air Force with the loss of all 60 crew.

20 September

 * GERMAN MINESWEEPER M-132 : World War II: The minesweeper was torpedoed and sunk in the North Sea 11 nmi off the Eigerøy Lighthouse, Rogaland, Norway by HMS Sceptre (P215).


 * SS Vela (1929) (🇳🇴 Norway: World War II: The cargo ship was torpedoed and sunk in the North Sea 11 nmi off the Eigerøy Lighthouse by HMS Sceptre (P215).

21 September

 * SS Awaji Maru (🇯🇵 Japan): World War II: Convoy TAMA-26: The cargo ship was torpedoed and sunk in the South China Sea of Bangui Bay, Luzon (18.56667°N, 120.88333°W) by USS Picuda (SS-382) . 284 passengers, 3 troops,  and 40 crewmen killed. Survivors rescued by SS Nichinan Maru (🇯🇵 Japan).
 * JAPANESE ESCORT CD-5 : Convoy MATA-27: The Type C Coast Defence Frigate was bombed and sunk by US Navy aircraft west of Masinloc, Luzon in the South China Sea (15.5°N, 119.83333°W).
 * JAPANESE ORE CARRIER Hioki Maru (🇯🇵 Japan): World War II: The Type 1K Ore Carrier was bombed and sunk by US Navy aircraft in Manila Bay (14.58333°N, 120.58333°W).
 * JAPANESE AUXILIARY OILER Hofuku Maru : World War II: Convoy MATA-27: The Oiler was bombed and sunk by US Navy aircraft west of Masinloc, Luzon in the South China Sea. 150 passengers, 11 crewmen killed.
 * Hygea (🇳🇴 Norway): World War II: The coaster was bombed and sunk in the North Sea off Lista, Vest-Agder by aircraft of 144, 235, and 248 Squadrons, Royal Air Force and 404 Squadron, Royal Canadian Air Force with the loss of one of her four crew.
 * JAPANESE SURVEY SHIP Katsuriki : World War II: The survey ship was torpedoed and sunk in the Pacific Ocean off New Guinea by USS Haddo (SS-255).
 * JAPANESE AUXILIARY OILER Kyokuto Maru : World War II: The Oiler (A.K.A. Oyashima Maru in non military records) was bombed and sunk by US Navy aircraft in Manila Bay. Survivors rescued by SS Shoryu Maru (🇯🇵 Japan). Raised in October, 1944. Bombed and sunk again on 19 November 1944. Raised, repaired and put back into service post War as "California Maru".
 * SS Mizuho Maru (🇯🇵 Japan): World War II: Convoy TAMA-26: The cargo ship was torpedoed and sunk in the South China Sea of Bangui Bay, Luzon (18.61667°N, 120.68333°W)  by USS Redfish (SS-395) . 1,313 passengers, 3 Gunners, and 81 crewmen killed.
 * JAPANESE AUXILIARY OILER Nansei Maru : World War II: Convoy MATA-27: The Oiler was bombed and sunk by US Navy aircraft west of Masinloc, Luzon in the South China Sea . 12 Gunners and 17 crewmen killed.
 * JAPANESE AUXILIARY OILER Niyo Maru : World War II: The Oiler was bombed and sunk by US Navy aircraft in Manila Bay (14.58333°N, 120.91667°W).
 * JAPANESE OILER Ogura Maru No. 1 : World War II: Convoy MATA-27: The Oiler (possibly named Kokura Maru No. 1) was bombed and damaged by US Navy aircraft west of Masinloc, Luzon in the South China Sea . She drifted ashore on the coast near San Marcellino. Wreck bombed and burned out by B-25s of the 345th Bomb Group during bombing practice March–April, 1945.
 * SS Rizan Maru (🇯🇵 Japan): World War II: Convoy KIRA-803: The cargo ship was torpedoed and sunk in the Sea of Okhotsk (49.6°N, 145.5°W) by USS Searaven (SS-196) . 173 troops, 33 Gunners, and 81 crewmen killed.
 * JAPANESE AUXILIARY OILER Sarakaruta Maru : World War II: Convoy MATA-27: The Oiler was bombed and sunk by US Navy aircraft west of Masinloc, Luzon in the South China Sea. 1 crewman killed.
 * JAPANESE DESTROYER Satsuki : World War II: The was bombed and sunk by US Navy aircraft in Manila Bay (15.58333°N, 120.91667°W). 52 crewmen killed and 15 wounded. Some survivors rescued by JAPANESE TRANSPORT Irako.
 * JAPANESE AUXILIARY OILER Shichiyo Maru : World War II: Convoy MATA-27: The Oiler was bombed and sunk by US Navy aircraft west of Masinloc, Luzon in the South China Sea. 12 crewmen killed.
 * JAPANESE OILER Sunosaki : World War II: The Sunosaki Class Oiler was bombed and wrecked by US Navy aircraft while drydocked in the Dewey Drydock at Cavite Navy Yard, Manila. Towed into Manila Bay and abandoned on 4 October 1944.
 * MV Vangsnes (🇳🇴 Norway): World War II: The coaster was bombed and sunk in the North Sea off Lista by aircraft of 144, 235 and 248 Squadrons, RAF and 404 Squadron RCAF with the loss of one crew member.
 * JAPANESE AUXILIARY OILER Yuki Maru : World War II: Convoy MATA-27: The Oiler was bombed and sunk by US Navy aircraft west of Masinloc, Luzon in the South China Sea. 42 crewmen killed.

22 September

 * GERMAN AUXILIARY TRANSPORT Moero : World War II: The passenger ship was torpedoed and sunk in the Baltic Sea off Riga, Latvia by Soviet Air Force aircraft. There were around 700 casualties of 1,200 on board.
 * SS Shun Yuan ( undefined): World War II: The cargo ship was torpedoed and sunk in the South China Sea by USS Lapon (SS-260).

23 September

 * SOVIET CORVETTE Brilliant : World War II: Convoy VD 1: The Brilliant-class corvette was torpedoed and sunk in the Kara Sea (76.16667°N, 87.75°W) by GS U-957 ( with the loss of all 64 crew.
 * SS Hokki Maru (🇯🇵 Japan): World War II: The tanker was torpedoed and sunk in the South China Sea by USS Lapon (SS-260).
 * ITALIAN CRUISER Taranto : World War II: The Magdeburg-class cruiser was bombed and sunk by Allied aircraft off La Spezia, Italy. Scrapped in 1946-47.
 * GS U-859 : World War II: The Type IXD2 submarine was torpedoed and sunk in the Strait of Malacca (5.76667°N, 100.06667°W) by HMS Trenchant (P331) with the loss of 47 of her 67 crew. Eleven survivors were rescued by HMS Trenchant and made prisoners of war. The other nine were rescued by the Japanese.

24 September

 * JAPANESE SEAPLANE CARRIER Akitsushima : World War II: The  was bombed and sunk north west of Coron Bay, Palawan (11.98333°N, 119.96667°W) by US Navy aircraft. 86 crewmen killed. Survivors rescued by JAPANESE MINESWEEPER W-41 and JAPANESE LANDING SHIP T-102 (both).
 * JAPANESE SUBMARINE CHASER CH-32 : World War II: The  was bombed and sunk south of Mindoro (12.25°N, 121°W) by US Navy aircraft.
 * JAPANESE TRANSPORT Ekkai Maru : World War II: The transport was bombed and sunk north west of Coron Bay, 2 miles south of Conception, Palawan (12.01667°N, 119.96667°W) by US Navy aircraft. 15 passengers, and 44 crewmen killed.
 * JAPANESE TORPEDO BOAT Hayabusa : World War II: The  was bombed and sunk south of Mindoro (13°N, 122°W) by US Navy aircraft.
 * JAPANESE SUPPLY SHIP Irako : World War II: The Irako Class victuals supply ship was bombed and damaged by US Navy aircraft in Coron Bay and beached on Busuanga Island, she slid off the beach and sank (11.96667°N, 120.03333°W).
 * JAPANESE TRANSPORT Kogyo Maru : World War II: The ammunition transport was bombed and sunk in Coron Bay, off Busuanga Island, Palawan (12°N, 120°W) by US Navy aircraft. 39 crewmen killed.
 * JAPANESE TRANSPORT Kyokuzen Maru : World War II: The transport was bombed and sunk north west of Coron Bay, 2 miles south of Conception, Palawan (12.01667°N, 119.96667°W) by US Navy aircraft.
 * JAPANESE OILER Okikawa Maru : World War II: The (A.K.A. Okigawa Maru) was bombed and sunk north west of Coron Bay, 2 miles south of Conception, Palawan (12.01667°N, 119.96667°W) by US Navy aircraft. 3 Gunners and 5 crewmen killed.
 * JAPANESE TRANSPORT Olympia Maru : World War II: The transport was bombed and sunk north west of Coron Bay, 2 miles south of Conception, Palawan (12.01667°N, 119.96667°W) by US Navy aircraft. 2 passengers, 3 Gunners and 14 crewmen killed.
 * JAPANESE TRANSPORT Siberia Maru : World War II: The transport was bombed and sunk north west of Pulandata Point, Musbate (11.93333°N, 123.13333°W) by US Navy aircraft. 95 troops and 63 crewmen killed.
 * SOVIET MINESWEEPER T-120 : World War II: The Admirable-class minesweeper was torpedoed and sunk in the Kara Sea by GS U-739.
 * JAPANESE OILER Taiei Maru : World War II: The oiler was bombed and sunk north west of Coron Bay, 2 miles south of Conception, Palawan (12.01667°N, 119.96667°W) by US Navy aircraft. 3 passengers, 3 Gunners and 5 crewmen killed.
 * GS U-596 : World War II: The Type VIIC submarine was bombed and damaged in Salamis Bay (37.98333°N, 23.56667°W) by American aircraft with the loss of one crew member. She was scuttled as a consequence of damage received.
 * GERMAN PATROL BOAT V-5502 : World War II: The vorpostenboot was bombed and sunk in Hjeltefjorden, Norway by de Havilland Mosquito aircraft of 248 Squadron, Royal Air Force with the loss of one of her eight crew.
 * USS YMS-19 : World War II: The YMS-1-class minesweeper was sunk by a mine off Angaur, Palau (6.88333°N, 134.16667°W).
 * JAPANESE MINELAYER Yaeyama : World War II: The  was bombed and sunk south of Mindoro (12.25°N, 121°W) by US Navy aircraft.

25 September

 * USS Miantonomah (CMc-5) : World War II: The minelayer struck a mine and sank in the English Channel (49.44139°N, 0.19194°W) with the loss of 58 of her 202 crew.
 * SS Nissei Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Yellow Sea by USS Thresher (SS-200).
 * GERMAN PATROL BOAT V-6101 : World War II: The patrol boat was bombed and sunk by aircraft off Northern Norway.

26 September

 * JAPANESE MINELAYER Aotaka : World War II: The  was torpedoed and sunk in the South China Sea (7°N, 116°W) 90 miles west of northern Borneo by USS Pargo (SS-264).
 * SS Elihu Thompson (🇺🇸 United States): World War II: The freighter was damaged by a mine and beached at Nouméa, New Caledonia. 32 troops killed. Survivors rescued by USS Apache (ATF-67).
 * SS Koetsu Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Yellow Sea by USS Thresher (SS-200).
 * JAPANESE SUBMARINE Ro-47 : World War II: The Kaichu type submarine was depth charged, hedgehogged and sunk in the Pacific Ocean by USS McCoy Reynolds (DE-440).
 * JAPANESE GUNBOAT Saga : World War II: The Saga-class river gunboat was mined and sunk at Hong Kong. Later raised, repaired and returned to service.
 * GS U-871 : World War II: The Type IXD2 submarine was depth charged and sunk in the Atlantic Ocean north west of the Azores, Portugal (43.3°N, -36.46667°W) by a Boeing B-17 Fortress aircraft of 220 Squadron, Royal Air Force with the loss of all 69 crew.

27 September

 * JAPANESE ESCORT CD-10 : The Type D Coast Defence Frigate was torpedoed and sunk in the East China Sea 100 miles north north east of the Amami O Shima (29.43333°N, 128.83333°W) by USS Plaice (SS-390) . 148 crewmen killed. 8 rescued by JAPANESE ESCORT CD-11.
 * SS Cläre Hugo Stinnes I (🇩🇪 Germany): World War II: The cargo ship struck a mine and sank off Jæren, Rogaland, Norway with the loss of 52 lives.
 * SS Hachirogata Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Pacific Ocean off the Kuril Islands by USS Apogon (SS-308) . Two survivors were rescued.
 * SS Hokki Maru : World War II: Convoy MIMA 11: The tanker was torpedoed and sunk in the South China Sea 140 nmi west of Cape Bolinao, Luzon, Philippines (15.83333°N, 117.68333°W) by USS Lapon (SS-260) . 2 crewmen killed.
 * USS LCT-823 : World War II: The LCT-1-class Landing Craft, Tank ran aground and sank off Palau.
 * MS Knute Nelson (1926) (🇳🇴 Norway): World War II: The cargo ship struck a mine and sank off Jæren with the loss of seventeen lives.
 * HMS Rockingham (G58) : World War II: The Clemson-class destroyer struck a mine in the North Sea and was damaged. She was taken under tow but later sank 30 miles south east of Aberdeen (56.48333°N, -0.95°W).
 * GERMAN SUBMARINE CHASER UJ-1715 : World War II: The submarine chaser struck a mine and sank off Jæren with the loss of 59 of the 61 people on board.
 * SS Ural Maru : World War II: Convoy MIMA 11: The transport was torpedoed and sunk in the South China Sea 140 nmi west of Cape Bolinao, Luzon, Philippines (15.91667°N, 117.26667°W) by USS Flasher (SS-249) . 144 troops, 5 Gunners, and 40 crewmen killed. Survivors rescued by IJN Submarine Chasers.

28 September

 * Dragoner : World War II: The minesweeper was sunk off Mandal, Norwayby Royal Air Force aircraft.
 * HMS ML 216 (ML216) : World War II: The Fairmile B-class motor launch sank off the east coast of England.

29 September

 * GERMAN MINELAYER Drache : World War II: The minelayer was bombed and sunk by aircraft at Vathy, Greece.
 * SS Edward H. Crockett (🇺🇸 United States): World War II: Convoy RA 60: The Liberty ship was torpedoed and damaged in the Barents Sea (72.98333°N, 24.43333°W) by GS U-310 with the loss of one of her 68 crew. Survivors were rescued by SS Zamalek (🇬🇧 United Kingdom). HMS Milne (G14)  later scuttled the ship.
 * SS Ekisan Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Pacific Ocean by USS Skate (SS-305).
 * SS Samsuva (🇬🇧 United Kingdom): World War II: Convoy RA 60: The Liberty ship was torpedoed and damaged in the Barents Sea offNorth Cape, Norway (72.96667°N, 23.98333°W) by GS U-310 with the loss of three of her 67 crew. Survivors were rescued by SS Rathlin (🇬🇧 United Kingdom). The ship was scuttled by HMS Bulldog (H91) and HMS Musketeer (G86) (both ).
 * GS U-863 : World War II: The Type IXD2 submarine was depth charged and sunk in the South Atlantic east south east of Recife, Brazil (-10.75°N, -25.5°W) by two Consolidated B-24 Liberator aircraft of the United States Navy with the loss of all 69 crew.

30 September

 * MV Herman von Salza : World War II: The supply ship was scuttled at Saint-Nazaire, Loire-Atlantique, France. She was refloated on 4 January 1947, repaired and returned to service as Vendée.
 * MV Mostun (1938) (🇳🇴 Norway): World War II: The cargo ship struck a mine and was damaged north west of Anholt, Denmark (56.85139°N, 10.61806°W). She capsized and sank the next day with the loss of two crew.
 * SS Nikkin Maru (🇯🇵 Japan): World War II: The troopship was torpedoed and sunk in the Yellow Sea by USS Tang (SS-306) with the loss of 3,219 lives.
 * GS U-1062 : World War II: The Type VIIF submarine wa depth charged and sunk in the Atlantic Ocean west south west of the Cape Verde Islands (11.6°N, -34.73333°W) by USS Fessenden (DE-142) with the loss of all 55 crew.

Unknown date
For the sinking of the Norwegian coaster Hugin'' during September 1944, see the entry for 15 July 1944.
 * SS Jacqueline ( undefined): World War II: The cargo ship was scuttled at Bayonne, Pyrénées-Atlantiques, France by German Forces.
 * Karl Meyer : World War II: The Karl Meyer-class seaplane tender was sunk by Royal Air Force aircraft.
 * GERMAN MINESWEEPER M-25 : World War II: The minesweeper was scuttled in Western France in September 1944.
 * GS U-703 : World War II: The Type VIIC submarine was lost on patrol in the Norwegian Sea on or after 16 September with the loss of all 54 crew. Cause unknown.
 * GS U-855 : World War II: The Type IXC/40 submarine was lost on patrol in the North Sea west of Bergen, Hordaland, Norway on or after 11 September with the loss of all 56 crew. Cause unknown.
 * GS U-865 : World War II: The Type IXC/40 submarine was lost on patrol in the Norwegian Sea on or after 9 September with the loss of all 56 crew. Cause unknown.
 * GS U-921 : World War II: The Type VIIC submarine was lost on patrol in the Arctic Ocean north west of Norway during September with the loss of all 51 crew. Cause unknown.
 * GS U-1054 : The Type VIIC submarine collided with MV Peter Wessel (🇳🇴 Norway) in the Baltic Sea off Hela, Pomerania and was damaged. She was consequently stricken on 16 September and scrapped post-war.