List of shipwrecks in October 1944

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

1 October

 * JAPANESE MINELAYER Ajiro : World War II: Convoy No. 3927: The was torpedoed and sunk in the Pacific Ocean off the Bonin Islands by USS Snapper (SS-185).
 * SS Kyokuho Maru : World War II: Convoy MIMA-11: The Type 1TL Oiler was torpedoed and sunk in the South China Sea west of Luzon, Philippines (16.18333°N, 119.73333°W) by USS Cabrilla (SS-288) . 43 troops, 9 Gunners, and 66 crewmen were killed.
 * HMS MTB 347 : World War II: The Vosper 72 foot-class motor torpedo boat was shelled and sunk off Ijmuiden, The Netherlands by Kriegsmarine surface ships.
 * HMS MTB 360 : World War II: The Vosper 72 foot-class motor torpedo boat was shelled and sunk off Ijmuiden, The Netherlands by Kriegsmarine surface ships.
 * SS Seian Maru (🇯🇵 Japan): World War II: Convoy No. 3927: The cargo liner was torpedoed and sunk in the Pacific Ocean off the Bonin Islands (28.33333°N, 139.41667°W) by USS Snapper (SS-185) . 4 troops and 12 crewmen killed.
 * USS YMS-385 : World War II: The YMS-1-class minesweeper was sunk by a mine in the Zowariau Channel off Ulithi (9.86667°N, 139.61667°W).
 * SS Zuiyo Maru (🇯🇵 Japan): World War II: Convoy MIMA-11: The Oiler was torpedoed and sunk in the South China Sea west of Luzon, Philippines (16.11667°N, 119.71667°W) by USS Cabrilla (SS-288) . 2 Gunners, 19 crewmen, and 45 survivors of SS Ural Maru who were passengers on board, were killed.

2 October

 * SS Higane Maru (🇯🇵 Japan): World War II: Convoy MI-18: The Type 1K Ore Carrier was torpedoed and sunk in the South China Sea north west of Borneo, south west of Kudat off Gaya Bay (6.5°N, 116.25°W) by USS Hammerhead (SS-364) . 6 troops and 9 crewmen were killed.
 * SS Hiyori Maru (🇯🇵 Japan): World War II: Convoy MI-18: The Type 1K Ore Carrier was torpedoed and sunk in the South China Sea north west of Borneo, south west of Kudat off Gaya Bay (6.46667°N, 116.23333°W) by USS Hammerhead (SS-364) . 7 troops and 27 crewmen were killed.
 * SS Kokusei Maru (🇯🇵 Japan): World War II: Convoy MI-18: The Type 1K Ore Carrier was torpedoed and sunk in the South China Sea north west of Borneo, south west of Kudat off Gaya Bay (6.5°N, 116.3°W) by USS Hammerhead (SS-364) . 32 troops and 47 crewmen were killed.
 * SS Tsuyama Maru (🇯🇵 Japan): World War II: Convoy TAMA-28: The Transport was torpedoed and sunk in the Luzon Strait (20.83333°N, 121.51667°W) by USS Pomfret (SS-391) . 1,273 troops were killed.
 * SS Zar Ferdinand : World War II: The cargo ship was torpedoed and sunk north-west of Skiathos, Greece, by FRENCH SUBMARINE Curie.

3 October

 * SS Bertha (1922) (🇩🇪 Germany): World War II: The cargo ship was torpedoed and sunk by a submarine south of Cassandreia, Greece.
 * JAPANESE SUBMARINE I-177 : World War II: The was shelled and sunk in the Pacific Ocean by USS Samuel S. Miles (DE-183)  with the loss of all 101 crew.
 * USS LCT 1052 : World War II: The LCT-1-class Landing Craft, Tank was sunk in a tropical storm at Ulithi.
 * USS Seawolf (SS-197) : World War II: The was depth charged and sunk in the Molucca Sea off Morotai, Dutch East Indies by USS Richard M. Rowell (DE-403)  with the loss of all 79 people on board.
 * USS Shelton (DE-407) : World War II: The was torpedoed and damaged in the Molucca Sea off Morotai by JSUB Ro-41  with the loss of thirteen of her 215 crew. She was taken under tow by USS Richard M. Rowell (DE-403)  but later capsized and sank.

4 October

 * HMCS Chebogue (K317) : World War II: Convoy ONS 33: The was torpedoed and damaged in the Atlantic Ocean (49.33333°N, -24.33333°W) by GS U-1227 ( with the loss of seven of her 107 crew. She was taken towed to Port Talbot, Glamorgan, United Kingdom by HMCS Chambly (K116)  and was declared a total loss. Scrapped in February 1948.
 * SS Elisabeth Bornhofen (🇩🇪 Germany): World War II: The cargo ship was bombed and sunk by aircraft off Bergen, Norway.
 * USS LCT 579 : World War II: The LCT-1-class Landing Craft, Tank was sunk by a mine off Palau.
 * SS Radøy (🇳🇴 Norway): World War II: The coaster was bombed and sunk at Bergen by Royal Air Force aircraft. Wreck scrapped in summer 1945.
 * SS Sten (1910) (🇳🇴 Norway): World War II: The cargo ship was bombed and sunk at Bergen by Royal Air Force aircraft.
 * SS Ulv (1921) (🇳🇴 Norway): World War II: Convoy Al-635-Dr: The coaster was in collision with SS Altengamme (🇩🇪 Germany) at Ålesund, Møre og Romsdal and sank. She was raised post-war and repaired. Re-entered service in December 1949 as Gerold.
 * GS U-92 (1942) : World War II: The Type VIIC submarine was bombed and damaged at Bergen, Hordaland, Norway by Royal Air Force aircraft. She was consequently withdrawn from service and later scrapped.
 * GS U-437 : World War II: The Type VIIC submarine was bombed and damaged at Bergen by Royal Air Force aircraft. She was struck from the Kriegsmarine list the next day and scrapped in 1946.
 * GS U-993 : World War II: The Type VIIC submarine was destroyed in a Royal Air Force air raid on Bergen, Hordaland, Norway with the loss of two crew.

5 October

 * HMS BYMS 2255 (J1055) : World War II: The YMS-1-class minesweeper was sunk by mine off Boulogne, France.
 * HMS HDML 1227 : World War II: The Harbor Defence Motor Launch was shelled and sunk off Piraeus, Greece by Kriegsmarine surface ships.
 * GERMAN MINELAYER Pommern : World War II: The minelayer struck a mine and sank in the Mediterranean Sea off Toulon, Var, France with the loss of almost all of her crew.
 * ITALIAN AIRCRAFT CARRIER Sparviero (🇩🇪 Germany): The uncompleted aircraft carrier was scuttled at Genoa, Italy.

6 October

 * SS Akane Maru (🇯🇵 Japan): World War II: The tanker was torpedoed and sunk in the South China Sea in the Luzon Strait by USS Whale (SS-239) . 747 troops and 63 crewmen killed. Survivors rescued by JAPANESE ESCORT CD-21.
 * JAPANESE ESCORT CD-21 : World War II: The Type C Coast Defence Frigate was torpedoed and sunk in the South China Seain the Luzon Strait off Luzon (19.75°N, 118.36667°W) by USS Seahorse (SS-304) . Lost with all 170 hands and all of SS Akane Maru (🇯🇵 Japan) survivors.
 * SS Hokurei Maru (🇯🇵 Japan): World War II: combined Convoys MATA-28 and MIMA-11: The tanker was torpedoed and beached off Vigan, Luzon by USS Cabrilla (SS-288) . 5 passengers and 4 crewmen killed.
 * SS Triton (1920) (🇩🇪 Germany): World War II: The cargo ship was bombed and sunk by aircraft at Stralsund, Germany.
 * GS U-168 : World War II: The Type IXC/40 submarine was torpedoed and sunk in the Java Sea (-6.33333°N, 111.46667°W) by HNLMS Zwaardvisch (P322) with the loss of 23 of her 50 crew.
 * SS Yamamizu Maru No. 2 (🇯🇵 Japan): World War II: combined Convoys MATA-28 and MIMA-11: The tanker was torpedoed and sunk in the South China Sea off Vigan, Luzon by USS Cabrilla (SS-288) . 56 of 58 crewmen killed.

7 October

 *  : World War II: The HDML-class motor launch was sunk off Maungdaw, Burma by Allied aircraft.
 * SS Kinugasa Maru : World War II: combined Convoys MATA-28 and MIMA-11: The transport was torpedoed and sunk off Luzon (14.5°N, 115.73333°W)  by USS Baya (SS-318) and USS Hawkbill (SS-366)  (both ). 10 port Service workers and 33 crewmen killed.
 * SS Macassar Maru : World War II: The Transport (A.K.A. Makassar Maru) was torpedoed and sunk in the South China Sea north west of Vigan, Luzon (17.76667°N, 119.66667°W) by USS Aspro (SS-309) . 4 Marines, 1 Gunner and 3 crew were killed.

8 October

 * HMS BYMS 2030 (J830) : World War II: The YMS-1-class minesweeper was sunk by a mine in Seine Bay (49.45°N, -0.03333°W), west of Le Havre, France.
 * SS Dainichi Maru (Mitsui Bussan, 1922) (🇯🇵 Japan): World War II: Convoy 772: The troopship was torpedoed and sunk in the South China Sea by USS Gurnard (SS-254) with the loss of 2,089 lives.
 * MV Freikoll (🇳🇴 Norway): World War II: The coaster was torpedoed and damaged in the North Sea north of Florø, Sogn og Fjordane by two Royal Norwegian Navy Motor Torpedo Boats. She came ashore south of Søreboneset. All nine crew were rescued by HNOMS MTB-722.
 * SS Kohuko Maru (🇯🇵 Japan): World War II: Combined Convoys MATA-28 and MIMA-11: The cargo liner was torpedoed and sunk in Lingayen Gulf by USS Hoe (SS-258) . 361 civilian passengers, 15 Gunners and 41 crewmen killed.

9 October

 * USS LCT 459 : World War II: The LCT-1-class Landing Craft, Tank was lost by grounding off the west coast of France.
 * SS Ludolf Oldendorff (🇩🇪 Germany): World War II: The cargo ship was bombed and sunk by aircraft off Sirevåg, near Egersund, Norway.
 * SS Sarp (1916) (🇳🇴 Norway): The coaster sank of Egersund, Rogaland. Later raised, repaired and returned to service.
 * SS Tachibana Maru (🇯🇵 Japan): World War II: Convoy MATA-28: The tanker was torpedoed and sunk in the South China Sea south of Formosa by USS Sawfish (SS-276) . 20 passengers killed. Survivors rescued by JAPANESE ESCORT CD-8.
 * SS Tokuwa Maru (🇯🇵 Japan): World War II: Convoy MATA-28: The tanker was torpedoed and sunk in the South China Sea south of Formosa by USS Becuna (SS-319) . 10 crewmen killed.
 * GERMAN PATROL BOAT UJ-1711 : World War II: The patrol boat was bombed and sunk by aircraft off Norway.

10 October

 * SS Ejiri Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and damaged in the South China Sea (16.16667°N, 119.75°W) by USS Lapon (SS-260) . She ran aground and exploded 2 1/2 hours later after being abandond. 191 troops and 8 crewmen killed.
 * JAPANESE SUBMARINE TENDER Jingei : World War II: The was bombed and sunk off the coast of  Okinawa 12 miles west south west of Ie Shima and 28 miles north north west of Naha (26.65°N, 127.86667°W) by US Navy aircraft. She sank in shallow water with her superstructure above water. 100 crewmen killed. Raised in 1952, towed to Japan and scrapped.
 * HMS MGB 663 : World War II: The Fairmile D-class motor gunboat was sunk by a mine off Rimini, France.
 * SS Olsa (🇩🇪 Germany): World War II: The cargo ship was bombed and sunk by aircraft off Langfjord near Kirkenes, Norway.
 * JAPANESE MINELAYER Takashima : World War II: Convoy No. 3927: The was bombed and sunk in the Pacific Ocean north north west of  Okinawa by US Navy aircraft.
 * GS U-2331 : The Type XXIII submarine sank in the Baltic Sea off Hela Pomerania in a diving accident with the loss of fifteen of her nineteen crew.

11 October

 * SS Gotia (1905) (🇩🇪 Germany): World War II: The cargo ship was bombed and sunk by Soviet aircraft at Langfjord, Norway.
 * SS Joshu Go (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Formosa Strait by USS Tang (SS-306).
 * USS LCT 293 : World War II: The LCT-1-class Landing Craft, Tank foundered and sank in heavy weather in the English Chanel.
 * GERMAN MINESWEEPER M-303 : World War II: The minesweeper was torpedoed and sunk off Kiberg, Norway.
 * HMS ML 288 : World War II: The Fairmile B Class Motor Launch foundered off Hartepool.
 * SS Oita Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Formosa Strait by USS Tang (SS-306).
 * USS PT-368 : World War II: The ELCO 80'-class motor torpedo boat ran aground off Halmahera (1.98333°N, 127.95°W) and was scuttled.
 * SS Ypanis (🇬🇷 Greece): World War II: The cargo ship was scuttled in Piraeus, Greece.

12 October

 * SS Anna (1923) (🇩🇪 Germany): World War II: The cargo ship was bombed and sunk by aircraft off Volos, Greece.
 * SS Asaka Maru : World War II: The Asaka Maru Class transport was bombed and sunk in the South China Sea off the Pescadores (23.55°N, 119.71667°W) by US Navy aircraft.
 * MV Braganza (🇳🇴 Norway): The cargo ship caught fire and sank in the Atlantic Ocean (approximately -32.66667°N, -48.5°W) with the loss of three of the 53 people on board.
 * SS Hakko Maru (1917) (🇯🇵 Japan): World War II: The cargo ship was bombed and sunk in the South China Sea off Takao, Formosa (22.61667°N, 119.56667°W) by United States Navy aircraft.
 * SS Lumme (1927) (🇩🇪 Germany): World War II: The cargo ship was torpedoed and sunk by a submarine off Kirkenes, Norway.
 * HMS MMS 835 (J670) : World War II: The MMS-class minesweeper was sunk by a mine off Gorgona Island, Italy.
 * SS Toko Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the South China Sea by USS Ray (SS-271).

13 October

 * HMS HDML 1057 : World War II: The HDML-class motor launch was lost in an accident at Kilindili, Kenya.
 * SS Hilma Lau (🇩🇪 Germany): World War II: The cargo ship was torpedoed and sunk by a submarine in the Baltic Sea (55.33333°N, 15.33333°W).
 * USS LCT 454 : World War II: The LCT-1-class Landing Craft, Tank was lost in heavy weather in Lyme Bay, England.

14 October

 * SS Fort Fitzgerald (🇬🇧 United Kingdom): World War II: The Fort ship was bombed and sunk in the Mediterranean Sea (36.7°N, 1.28333°W) by Luftwaffe aircraft.
 * SS Howard L. Gibson (🇺🇸 United States): The Liberty ship collided in the Atlantic Ocean (34.11667°N, -21.4°W) wit MV Geo W McKnight (🇬🇧 United Kingdom). She caught fire and was consequently declared a constructive total loss.
 * USS LCI (L)-1065 : World War II: The Landing Craft, Infantry was sunk by an Imperial Japanese Navy Mitsubishi Ki-21 Sally aircraft.
 * HMS MFV 117 : World War II: The MFV-1-class motor fishing vessel was lost in an explosion in the Aegean Sea.
 * SS Nanrei Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Sulu Sea by USS Angler (SS-240).
 * USS Sonoma (AT-12) (: World War II: The Sonoma-class fleet tug was sunk by an Imperial Japanese Navy aircraft in San Pedro Bay, Philippines.
 * SS Standard (1930) (🇳🇴 Norway): World War II: The cargo ship was torpedoed and sunk in Saltenfjord by HMS Viking (P69) with the loss of thirteen crew.
 * SS Sudmeer : World War II: The whale factory ship was torpedoed and sunk by aircraft in Porsangerfjorden, Norway.

15 October

 * Dan (🇫🇮 Finland): World War II: The galliass was shelled and sunk in the Gulf of Finland off Osmundsholmar by GS U-481 . Both crew survived.
 * Endla (🇫🇮 Finland): World War II: The galliass was shelled, rammed and sunk in the Gulf of Finland off Osmundsholmar by GS U-481 . Both crew survived.
 * GREEK MINESWEEPER Kassos : World War II: The YMS-1-class minesweeper was sunk by a mine off Piraeus, Greece.
 * GREEK MINESWEEPER Kos : World War II: The YMS-1-class minesweeper was sunk by a mine off Piraeus, Greece.
 * HMS ML 870 : World War II: The Fairmile B Class Motor Launch was sunk by a mine off Paraeus, Greece.
 * Maria (🇫🇮 Finland): World War II: The galliass was shelled, rammed and sunk in the Gulf of Finland off Osmundsholmar by GS U-481 . The crew survived.
 * GERMAN TANKER Norwegen : World War II: The tanker was bombed and sunk in the North Sea off Lillesand, Aust-Agder, Norway by Allied aircraft with the loss of fifteen crew.
 * GS U-777 : World War II: The Type VIIC submarine was sunk off Wilhelmshaven, Lower Saxony (53.85°N, 8.16667°W) during a British air raid with the loss of one crew member.
 * GERMAN PATROL BOAT V-1605 : World War II: The patrol boat was bombed and sunk by aircraft off Justøy, Norway.

16 October

 * JAPANESE TORPEDO BOAT Hato : World War II: The was bombed and sunk 130 miles east south east of Hong Kong (21.9°N, 116.5°W) by US Navy aircraft.
 * R-301 : World War II: Minesweeper sunk by Soviet aircraft at Vardo
 * GS U-1006 : World War II: The Type VIIC/41 submarine was depth charged and sunk in the Atlantic Ocean south east of the Faroe Islands (60.98333°N, -4.81667°W) by HMCS Annan (K404) with the loss of six of her 50 crew.
 * GS V-6707 : World War II: Patrol ship sunk by Soviet aircraft at Kirkenes

17 October

 * BMO-527 : World War II: The MO-class guard ship was torpedoed and sunk in the Baltic Sea (59.5°N, 24.18333°W) by GS U-1165.
 * JAPANESE MINELAYER Itsukushima : World War II: The minelayer was torpedoed and sunk in the Java Sea (-5.53333°N, 113.8°W) by HNLMS Zwaardvisch (P322).
 * USS Montgomery (DD-121) : World War II: The destroyer-minelayer struck a mine off Ngulu Atoll and was decommissioned. Sold for scrapping in March 1946.
 * GERMAN PATROL BOAT V-6107 : World War II: The patrol boat was bombed and sunk by aircraft in the Varangerfjord, Norway.
 * SS Walter (1890) (🇩🇪 Germany): The cargo ship was wrecked off Stavanger, Norway.
 * USS YMS-70 : The minesweeper foundered in a storm in Leyte Gulf off Leyte, Philippines (10.93333°N, 125.2°W).

18 October

 * SS Arabia Maru : World War II: The Hawaii Maru-class transport was torpedoed and sunk in the South China Sea west south west of Manila, north west of Lubang Island, by USS Bluegill (SS-242) . 1,116 troops, 89 crewmen/Gunners killed. Survivors rescued by JAPANESE OILER Hakko Maru, JAPANESE SUBMARINE CHASER CH-21 , and JAPANESE PATROL BOAT PB-104.
 * SS Chinzei Maru : World War II: The Salvage Ship was torpedoed and sunk in the South China Sea (14.1°N, 119.66667°W)  west south west of Manila, north west of Lubang Island, by USS Bluegill (SS-242) . 1,116 troops, 89 crewmen/Gunners killed.
 * HMAS Geelong (J201) : World War II: The Bathurst-class minesweeper was sunk in the Solomon Sea in a collision with Tanker SS York (🇺🇸 United States) north of Langemak, New Guinea (-6.06667°N, 147.75°W).
 * SS Hakushika Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the South China Sea (14.1°N, 119.66667°W)  west south west of Manila, north west of Lubang Island, by USS Bluegill (SS-242).
 * USS LST 906 : Lost by grounding off Leghorn, Italy
 * JAPANESE MINELAYER Maeshima : World War II: Convoy TAMA-29A: The was bombed and damaged in Salomague Bay, near Lopoc Bay (17.76667°N, 120.41667°W) by US Navy aircraft. She was beached to prevent sinking.
 * JAPANESE MINELAYER Shinko Maru : World War II: Convoy TAMA-29A: The was bombed  in Salomague Bay, near Lopoc Bay (18.58333°N, 121.66667°W) by US Navy aircraft. She blew up and sank with all hands lost.
 * SS Shiranesan Maru : World War II: The cargo ship was torpedoed and sunk in the South China Sea (12.5°N, 119.16667°W) by USS Raton (SS-270) . 1,318 troops, 63 crewmen and 47 Gunners killed.
 * SS Taikai Maru : World War II: The cargo ship was torpedoed and sunk in the South China SEa by USS Raton (SS-270) . 445 troops and 101 crewmen/Gunners killed
 * JAPANESE LANDING SHIP Transport No. 135 : World War II: Convoy TAMA-29A: The No.103 class landing ship was strafed, set on fire and sank in Salomague Bay, near Lopoc Bay (18.58333°N, 121.66667°W) by US Navy aircraft.
 * JAPANESE LANDING SHIP Transport No. 136 : World War II: Convoy TAMA-29A: The No.103 class landing ship was bombed and sank in Salomague Bay, near Lopoc Bay (18.58333°N, 121.66667°W) by US Navy aircraft.

19 October

 * SS Belgium Maru : World War II: The Daifuku Maru No. 1-class transport was being used as a stationary Anti-Aircraft Battery when she was bombed and sunk in Manila Harbor by US Navy aircraft.
 * SS Jogu Maru (🇯🇵 Japan): World War II: The Cargo ship was bombed and sunk in Manila Harbor by US Navy aircraft.
 * SS Juan Casiano (🇲🇽 Mexico): The tanker sank in a gale 90 nmi off Savannah, Georgia United States with the loss of all 21 crew.
 * HMS LCT 480, HMS LCT 488, HMS LCT 491, HMS LCT 494, HMS LCT 7014, and HMS LCT 7015 (all): World War II: The LCT-1-class landing craft, tanks were cought in a storm and sank off Land's End.
 * SS Toshikawa Maru (🇯🇵 Japan): World War II: The Cargo ship was bombed and sunk in Manila Harbor by US Navy aircraft.
 * GS U-957 : The Type VIIC submarine collided with a German merchant ship at Lofoten, Norway. She was consequently withdrawn from service as a result of damage sustained.

20 October

 * SS Jason (1908) (🇳🇴 Norway): World War II: The coaster was bombed and sunk in Persfjord, Finnmark by Soviet Air Force aircraft.
 * SS Milos (1906) (🇩🇪 Germany): World War II: The cargo ship struck a mine and sank off Kristiansand, Norway.
 * JAPANESE AUXILIARY TRANSPORT Oyo Maru : World War II: Convoy SAMA-13: The transport was torpedoed and sunk in the South China Sea north west of Miri, Borneo (4.75°N, 113.5°W) by USS Hammerhead (SS-364) . 1 passenger and 3 crewmen killed.
 * JAPANESE AUXILIARY TRANSPORT Ugo Maru : World War II: Convoy SAMA-13: The transport was torpedoed and sunk in the South China Sea north west of Miri, Borneo (4.75°N, 113.5°W) by USS Hammerhead (SS-364) . 24 crewmen killed.

21 October

 * SS Hohenhörn (🇩🇪 Germany): World War II: The cargo ship struck a mine and sank off Gothenburg, Sweden.
 * GERMAN MINESWEEPER M-31 : World War II: The minesweeper was torpedoed and sunk off Honningsvåg, Norway.
 * SS Vestra (🇳🇴 Norway): World War II: The coaster was bombed and sunk off Haugesund, Rogaland by de Havilland Mosquito aircraft of 235, and 248 Squadrons, Royal Air Force and 404 Squadron, Royal Canadian Air Force. All crew were rescued.

22 October

 * SS Biri (🇳🇴 Norway): World War II: The coaster ran aground in Norwegian waters and was abandoned. She was bombed and sunk the next day by de Havilland Mosquito aircraft of 235 and 248 Squadrons, Royal Air Force. Raised in 1947, repaired and returned to service.
 * SS Eiko Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the South China Sea off Batan Island, Philippines by USS Seadragon (SS-194).
 * SS Kokuryu Maru (🇯🇵 Japan): World War II: The cargo liner was torpedoed and sunk in the South China Sea off Batan Island by USS Seadragon (SS-194).
 * JAPANESE SUPPLY SHIP Muroto : World War II: Convoy KATA-916: The Muroto class supply ship was torpedoed and sank in the East China Sea, south of Suwanose Island, (29.3°N, 129.73333°W) by USS Sea Dog (SS-401).
 * SS Taiten Maru (🇯🇵 Japan): World War II: The cargo liner was torpedoed and sunk in the South China Sea off Batan Island by USS Seadragon (SS-194).

23 October

 * JAPANESE CRUISER Atago : World War II: Battle of the Palawan Passage: The was torpedoed and sunk in the Pacific Ocean (9.46667°N, 117.28333°W) by USS Darter (SS-227)  with the loss of 360 of her 1,060 crew.  Survivors were rescued by JAPANESE DESTROYER Asashimo and JAPANESE DESTROYER Kishinami (both ).
 * SS Kikusu Maru (🇯🇵 Japan): World War II: The tanker was torpedoed and sunk in the South China Sea by USS Snook (SS-279).
 * JAPANESE AUXILIARY SEAPLANE TENDER Kimikawa Maru : World War II: Convoy MATA-30: The was torpedoed and sunk in the South China Sea south of Formosa and west north west of Cape Bojeudor, Luzon (18.96667°N, 118.76667°W)  by USS Sawfish (SS-276) . 81 passengers and 24 crewmen killed.
 * HMS LCT 1171 : World War II: The LCT-1-class landing craft, tank was lost on this date. N.F.I.
 * SS Margareta (1922) (🇩🇪 Germany): World War II: The cargo ship was bombed and sunk by aircraft off Northern Norway.
 * JAPANESE CRUISER Maya : World War II: Battle of the Palawan Passage: The was torpedoed and sunk in the Palawan Passage (9.45°N, 117.38333°W) by USS Dace (SS-247)  with the loss of 336 of her 1,105 crew. Survivors were rescued by JAPANESE DESTROYER Akishimo, which transferred them to JAPANESE BATTLESHIP Musashi (both ); 143 of them were lost when Musashi was sunk on 24 October.
 * SS Shinsei Maru No.1 (🇯🇵 Japan): World War II: The cargo liner was torpedoed and sunk in the South China Sea by USS Snook (SS-279).
 * SS Tatsuju Maru (🇯🇵 Japan): World War II: The cargo liner was torpedoed and sunk in the South China Sea north west of Mako, Pescadores, by USS Tang (SS-306) . 2 Troops and 5 crewmen killed.
 * SS Toun Maru (🇯🇵 Japan): World War II: The cargo liner was torpedoed and burned out in the South China Sea north north west of Mako, Pescadores, by USS Tang (SS-306) . 131 Landing Troops, 5 passengers, 12 Gunners and 16 crewmen killed.
 * V-5506 Zick : World War II: The vorpostenboot was sunk in the North Sea off Bergen, Hordaland, Norway by Royal Air Force aircraft.
 * GS U-985 : World War II: The Type VIIC submarine struck a mine at Lister and was severely damaged. She was consequently withdrawn from service and decommissioned on 15 November 1944.
 * SS Wakatake Maru (🇯🇵 Japan): World War II: The cargo liner was torpedoed and sunk in the South China Sea north north west of Mako, Pescadores, (24.81667°N, 120.43333°W) by USS Tang (SS-306) . 128 Troops, 7 passengers, 11 Gunners and 30 crewmen killed.

24 October

 * Arisan Maru (🇯🇵 Japan): World War II: The hell ship was torpedoed and sunk in the South China Sea (20°N, 118.73333°W)  by USS Shark (SS-314)  while carrying 1781 US and Allied POWs, with the loss of 1,773 P.O.W.s, 27 Japanese passengers, 13 Gunners and 2 crewmen. Over 300 survivors rescued by JAPANESE DESTROYER Take.
 * Augustus Thomas (🇺🇸 United States): World War II: The Liberty Ship was severely damaged by a heavily damaged Japanese Kamakaze bomber that struck her off Leyte. She was beached one mile east of the Palo River. Eventually refloated and declared a total loss. Towed to Australia and then to California arriving in early 1946, scrapped in 1957.
 * USS Darter (SS-227) : World War II: The ran aground in the Palawan Strait, Philippines and was scuttled to prevent capture by the Japanese.
 * SS Daiten Maru (🇯🇵 Japan): World War II: Convoy MATA-30: The Transport was torpedoed and sunk in the South China Sea north west of Vigan, Luzon (20.2°N, 119.01667°W) by USS Seadragon (SS-194) .  5 crewman were killed.
 * SS Eiko Maru (🇯🇵 Japan): World War II: Convoy MATA-30: The Transport was torpedoed and sunk in the South China Sea north west of Vigan, Luzon (20.58333°N, 118.53333°W) by USS Seadragon (SS-194) .  1 crewman and 3 survivirs of SS Shinsei Maru No. 1 (🇯🇵 Japan) were killed.
 * MV Glommen 4 : The coaster was run aground by her crew at Jakobsnes, Finnmark, Norway and an attempt was made to set her on fire. Sold post-war, repaired and converted to a fishing vessel, entering service in 1949 as Henningsvær.
 * SS Ikutagawa Maru (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Pacific Ocean off Chichi-jima by USS Kingfish (SS-234).
 * SS Kikusui Maru (🇯🇵 Japan): World War II: Convoy MATA-30: The Transport was torpedoed and sunk in the South China Sea north west of Vigan, Luzon (19.76667°N, 118.5°W) by USS Snook (SS-279) . 12 were killed.
 * SS Kokuryu Maru (🇯🇵 Japan): World War II: Convoy MATA-30: The Transport was torpedoed and sunk in the South China Sea north west of Vigan, Luzon (19.7°N, 118.63333°W) by USS Snook (SS-279)  or USS Icefish (SS-367)  . 324 passengers, 5 Gunners and 63 crew were killed.
 * SS Kori Go Maru (🇯🇵 Japan): World War II: The cargo liner was torpedoed and sunk in the South China Sea north north west of Mako, Pescadores, (24.7°N, 120.35°W) by USS Tang (SS-306) . 1 crewman killed.
 * USS LCI(L)-1065 World War II: The LCI-351-class landing craft, infantry was lost in Leyte Gulf. N.F.I.
 * Linnea (🇫🇮 Finland): World War II: The galliass was torpedoed and sunk in the Baltic Sea of Odensholm by GS U-958 (.
 * SS Mikage Maru : World War II: The cargo ship was torpedoed and sunk in the East China Sea (33°N, 125.81667°W) by USS Croaker (SS-246).
 * JAPANESE BATTLESHIP Musashi : World War II: The was bombed and sunk in the Sibuyan Sea by aircraft from USS Essex (CV-9), USS Franklin (CV-13) and USS Intrepid (CV-11) (all ) with the loss of 1,023 of her 2,399 crew.
 * MS Panuco (1940) ( undefined): World War II: The tanker was shelled and sunk in Genoa, Italy. Raised and scrapped after the war.
 * USS Princeton (CVL-23) : World War II: Battle of Leyte Gulf: The ) was damaged by an Imperial Japanese Navy Yokosuka D4Y Judy kamikaze aircraft attack with the loss of 108 of her 1,469 crew. Survivors were rescued by USS Birmingham (CL-62) and USS Irwin (DD-794). Princeton was then scuttled by USS Reno (CL-96).
 * USS Shark (SS-314) : World War II: The was depth charged and sunk in the Luzon Strait by JAPANESE DESTROYER Harukaze and JAPANESE DESTROYER Take, both   with the loss of all 81 crew.
 * SS Shikisan Maru (🇯🇵 Japan): World War II: Convoy MATA-30: The Transport was torpedoed and sunk in the South China Sea north west of Vigan, Luzon (20.45°N, 118.51667°W) by USS Drum (SS-228) . 4 passengers and 17 crew were killed.
 * SS Shinsei Maru No. 1 (🇯🇵 Japan): World War II: Convoy MATA-30: The Transport was torpedoed and sunk in the South China Sea north west of Vigan, Luzon (20.51667°N, 118.7°W) by USS Snook (SS-279) . 3 Gunners and 10 crew were killed. 100 survivors rescued by SS Eiko Maru (🇯🇵 Japan).
 * USS Sonoma (AT-12) : World War II: The was set on fire when a heavily damaged Japanese bomber's wing struck her funnel spreading flaming gasoline over the ship. The bomber crashed into SS Augustus Thomas (🇺🇸 United States) and the detonation of the bombers bombs did further damage. Severely damaged, an attempt was made to beach her but she sank off Dio Island, Leyte Gulf, The Philippines. All 56 crew were rescued by USS Chickasaw (ATF-83) and USS LCI-72 (both ).
 * SS Tenshin Maru (🇯🇵 Japan): World War II: Convoy MATA-30: The Transport was torpedoed and sunk in the South China Sea north west of Vigan, Luzon (19.7°N, 118.63333°W) by USS Snook (SS-279)  or USS Shark (SS-314)  . 5 Gunners and 47 crew were killed.
 * GS U-673 : The Type VIIC submarine collided in the North Sea north of Stavanger, Rogaland, Norway with GS U-322 and was beached near Smaaskär (59.33333°N, 5.88333°W), where she later sank. Raised on 9 November 1944, towed to Stavanger and surrendered to Norway, subsequently scrapped.
 * GERMAN PATROL BOAT V-6111 : World War II: The patrol boat was torpedoed and sunk by aircraft off Vadsø, Norway.
 * JAPANESE DESTROYER Wakaba : World War II: Battle of Leyte Gulf: The was bombed and sunk west of Panay (11.83333°N, 121.41667°W) by aircraft based on USS Franklin (CV-13)  with the loss of 58 of her 200 crew. Survivors were rescued by JAPANESE DESTROYER Hatsuharu and JAPANESE DESTROYER Hatsushimo (both ).

25 October

 * JAPANESE DESTROYER Akizuki : World War II: Battle of Leyte Gulf: The was torpedoed and sunk by US Navy aircraft or torpedoed and sunk by USS Halibut (SS-232)  in the Pacific Ocean. She blew up with the loss of 183 of her crew. 145 survivors were rescued by JAPANESE DESTROYER Maki ) and one later by the US Navy.
 * JAPANESE DESTROYER Asagumo : World War II: Battle of Surigao Strait: The was torpedoed, shelled and sunk in the Surigao Strait (-1.98333°N, 104.93333°W) by United States Navy ships with the loss of 191 of her 230 crew and all survivors from JAPANESE BATTLESHIP Fusō  which she had rescued earlier that day.
 * HMS BYMS 2077 : World War II: The YMS-1-class minesweeper sunk by mine in Gulf of Corinth, Greece.
 * JAPANESE CRUISER Chikuma : World War II: Battle off Samar: The was torpedoed and sunk by Grumman TBM Avenger aircraft based on USS Kitkun Bay (CVE-71), USS Natoma Bay (CVE-62) and USS Ommaney Bay (CVE-79) (all ) in the Philippine Sea off Samar Island (11.41667°N, 126.6°W). All but one of her survivors were rescued by JAPANESE DESTROYER Nowaki  but were lost with the sinking of that ship the next day. The one survivor not picked up drifted to shore alive.
 * JAPANESE AIRCRAFT CARRIER Chitose : World War II: Battle of Leyte Gulf: The was bombed and sunk in the Leyte Gulf (19.33333°N, 126.33333°W) by aircraft based on USS Essex (CV-9) and USS Lexington (CV-16) (both ) with the loss of 903 of her 1,504 crew. Survivors were rescued by JAPANESE CRUISER Isuzu and JAPANESE DESTROYER Shimotsuki (both ).
 * JAPANESE AIRCRAFT CARRIER Chiyoda (: World War II: Battle of Leyte Gulf: The was bombed and damaged in the Leyte Gulf by aircraft based on USS Franklin (CV-13) and USS Lexington (CV-16) (both ). She was then shelled and sunk by USS Mobile (CL-63), USS New Orleans (CA-32), USS Santa Fe (CL-60) and USS Wichita (CA-45) (all ) with the loss of all 800 crew.
 * JAPANESE CRUISER Chokai : World War II: Battle off Samar: The was bombed by US Navy aircraft, and shelled by USS Samuel B. Roberts (DE-413) and USS White Plains (CVE-66) (both )), in the Philippine Sea off Samar Island (11.36667°N, 126.36667°W). She was scuttled by JAPANESE DESTROYER Fujinami  who also rescued her survivors.
 * SS Ebara Maru (🇯🇵 Japan): World War II: Convoy MI-23: The Standard 2AT Class Oiler was torpedoed and sunk in the Formosa Strait (25.06667°N, 119.58333°W) by USS Tang (SS-306) . 11 crew were killed. Survivors were rescued by Frigate JAPANESE ESCORT CD-34.
 * JAPANESE BATTLESHIP Fusō : World War II: Battle of Surigao Strait. The was torpedoed and sunk by USS Melvin (DD-680).
 * Gambier Bay : World War II: Battle of Leyte Gulf: The was sunk in the Pacific Ocean near Samar, Philippines by Imperial Japanese Navy gunfire.
 * SS Hakuyo Maru (🇯🇵 Japan): World War II: Convoy WO-303: The cargo ship was torpedoed and sunk in the Pacific Ocean off the Kuril Islands (50.35°N, 150.33333°W) by USS Seal (SS-183) . 1,312 navy passengers, 26 Gunners and 113 crewmen killed.
 * JAPANESE DESTROYER Hatsuzuki : World War II: Battle off Cape Engaño: The was shelled and sunk east north east of Cape Engaño, Philippines (20.4°N, 126.33333°W) by USS Wichita (CA-45).
 * USS Hoel (DD-533) : World War II: Battle off Samar: The was shelled and sunk in the Pacific Ocean off Samar by JAPANESE BATTLESHIP Kongō  with the loss of 253 of her 349 crew.
 * SS Jarnbarden (🇩🇪 Germany): World War II: The cargo ship was sunk off Båtsfjord, Finnmark, Norway. She either struck a mine, or was torpeded and damaged by a Soviet Nav submarine and then scuttled by a Kriegsmarine minesweeper.
 * FLEET OILER Jinei Maru : World War II: The Type 2TL Oiler was torpedoed and sunk in the Pacific Ocean south of Yaku Jima, Japan  by USS Sterlet (SS-392) . Survivors rescued by JAPANESE DESTROYER Akikaze.
 * USS Johnston (DD-557) : World War II: Battle off Samar: The was shelled and sunk in the Pacific Ocean off Samar (11.76667°N, 126.15°W) by Imperial Japanese Navy warships with the loss of 186 of her 327 crew.
 * HMS LCT 1045 : World War II: The LCT-1-class Landing Craft, Tank sank while under tow in the English Channel.
 * SS Matsumoto Maru (🇯🇵 Japan): World War II: Convoy MI-23: The cargo ship was torpedoed and sunk in the Formosa Strait off Turnabout Island by USS Tang (SS-306) . Survivors were rescued by Frigate JAPANESE ESCORT CD-34.
 * JAPANESE DESTROYER Michishio : World War II: Battle of Surigao Strait: The was torpedoed and sunk in the Surigao Strait (10.41667°N, 125.38333°W) by USS Hutchins (DD-476) and USS McDermut (DD-677) (both ).
 * JAPANESE CRUISER Mogami : World War II: Battle of the Surigao Strait: The was shelled by USS Denver (CL-58), USS Louisville (CA-28) and USS Portland (CA-33) (all ) and was then bombed by Grumman TBF Avenger aircraft. She was scuttled in the Surigao Strait (9.66667°N, 124.83333°W) by JAPANESE DESTROYER Akebono with the loss of 192 of her 850 crew.
 * USS PT-493 : World War II: Battle of Surigao Strait: The  was shelled and sunk in the Surigao Strait (10.25°N, 125.38333°W) by Imperial Japanese Navy warships.
 * USS Samuel B. Roberts (DE-413) : Battle off Samar: The was shelled and sunk in the Pacific Ocean off Samar 11.66667°N, 126.33333°W) by JAPANESE BATTLESHIP Kongō  with the loss of 89 of her 209 crew.
 * HMCS Skeena (D59) : The was driven ashore at Viðey, Iceland in a storm and was wrecked with the loss of fifteen of her 181 crew.
 * St. Lo : World War II: Battle of Leyte Gulf: The was sunk in the Pacific Ocean near Leyte, Philippines by Japanese Kamikaze aircraft with the loss of about 140 of her 889 crew. Survivors were rescued by USS Dennis (DE-405), USS Heermann (DD-532), USS John C. Butler (DE-339) and USS Raymond (DE-341) (all ).
 * JAPANESE CRUISER Suzuya : World War II: Battle off Samar: The was bombed and sunk by US Navy aircraft  in the Philippine Sea off Samar Island (11.75°N, 126.18333°W). She was scuttled by JAPANESE DESTROYER Okinami  who also rescued her survivors.
 * JAPANESE CRUISER Tama : World War II: The was torpedoed by USS Jallao (SS-368) at 21.38333°N, 127.31667°W after the Battle of Leyte Gulf.
 * USS Tang (SS-306) : World War II: The was sunk by the malfunction of one of her own torpedoes in the Formosa Strait off Turnabout Island (25.1°N, 119.51667°W) with the loss of 74 of her 85 crew. The survivors were rescued by Frigate JAPANESE ESCORT CD-34  and taken as prisoners of war.
 * JAPANESE DESTROYER Wakaba : World War II: Battle of Leyte Gulf: The was bombed and sunk in the Pacific Ocean off the west coast of Panay Island, Philippines (11.83333°N, 121.41667°W) by aircraft from USS Franklin (CV-13)  with the loss of 48 of her 200 crew. Survivors were rescued by JAPANESE DESTROYER Hatsuharu and JAPANESE DESTROYER Hatsushimo (both ).
 * SS Wangerooge (1944) (🇩🇪 Germany): The cargo ship struck a mine and sank off Stad, Norway.
 * JAPANESE DESTROYER Yamagumo : World War II: Battle of Surigao Strait: The was torpedoed and sunk in the Surigao Strait (10.41667°N, 125.38333°W) by USS McDermut (DD-677)  with the loss of all 200 crew.
 * JAPANESE BATTLESHIP Yamashiro : World War II: Battle of Surigao Strait: The was sunk by gunfire from USS Tennessee (BB-43)  with the loss of all bar ten of her 1,400 crew.
 * JAPANESE AIRCRAFT CARRIER Zuihō : World War II: Battle of Cape Engaño: The was bombed and sunk by aircraft from USS Hornet (CV-8)  with the loss off 215 of her 974 crew. Survivors were rescued by JAPANESE BATTLESHIP Ise and  JAPANESE DESTROYER Kuwa (both ).
 * JAPANESE AIRCRAFT CARRIER Zuikaku : World War II: Battle of Leyte Gulf: The was bombed and sunk in Leyte Gulf by aircraft based on USS Lexington (CV-16)  with the loss of 843 of her 1,705 crew. Survivors were rescued by JAPANESE DESTROYER Kuwa and JAPANESE DESTROYER Wakatsuki (both ).

26 October

 * JAPANESE CRUISER Abukuma : World War II: The was bombed and sunk in the Sulu Sea off Negros, The Philippines (9.33333°N, 122.53333°W) by B-24s of the 5th Bomb Group, 13th Air Force. 250 crewmen killed. Her C.O. and 283 crewmen rescued by JAPANESE DESTROYER Ushio.
 * MV Bærum (🇳🇴 Norway): World War II: The coaster was bombed and sunk at Rørvik, Nord-Trøndelag by Allied aircraft with the loss of one crew member.
 * JAPANESE DESTROYER Hayashimo : World War II: The was torpedoed and had her bow blown off by an aircraft based on USS Hornet (CV-12) . She was beached and partially sank in shallow water on Semirara Island 40 miles south east of Mindoro (12.83333°N, 121.35°W). 120 survivors abandonded the wreck on 12 November.
 * JAPANESE SUBMARINE I-26 : World War II: The B1 type submarine was sunk in the Pacific Ocean by USS Coolbaugh (DE-217) or USS Richard M. Rowell (DE-403) (both ) with the loss of all 94 crew.
 * JAPANESE CRUISER Kinu : World War II: The was bombed and sunk in the Sibuyan Sea south west of Masbate, Philippines by Grumman TBM Avenger and Grumman FM-2 Wildcat aircraft based on USS Manila Bay (CVE-61), USS Marcus Island (CVE-77) and USS Natoma Bay (CVE-62) (all ). Most of her 813 crew were rescued.
 * GERMAN MINESWEEPER M-433 : World War II: The minesweeper was bombed and sunk by aircraft off Leka, Norway. (65°N, 12°W)
 * HMS ML 579 : World War II: The Fairmile B Class Motor Launch was bombed and sunk at Leros, Greece.
 * HMS MTB 669 : World War II: The Fairmile D Class Motor Torpedo Boat was shelled and sunk by Kriegsmarine surface ships off Norway.
 * JAPANESE CRUISER Noshiro : World War II: Battle off Samar: The was bombed, torpedoed and sunk in the Philippine Sea west of Panay Island, Philippine (11.7°N, 121.68333°W) by Grumman TBF Avenger aircraft based on USS Cowpens (CVL-25) and  USS Wasp (CV-18) and Curtiss SB2C Helldiver aircraft based on USS Hornet (CV-12) (all ) with the loss of 397 of her 726 crew. 328 survivors were rescued by JAPANESE DESTROYER Akishimo and JAPANESE DESTROYER Hamanami (both ).
 * JAPANESE DESTROYER Nowaki : World War II: The was shelled and damaged in the Pacific Ocean 65 nmi east south east of Legaspi (13°N, 124.9°W) by United States Navy destroyer. She was then torpedoed and sunk by USS Owen (DD-536) . Lost with all hands plus all the survivors of JAPANESE CRUISER Chikuma  she had rescued the day before.
 * HNOMS Rose : World War II: The was accidentally rammed and sunk by the British frigate HMS Manners in the Atlantic Ocean. Three crewmen were killed, with 72 survivors rescued by the British destroyer HMS Highlander.
 * JAPANESE LANDING SHIP Transport No. 102 : World War II: The No.101 class landing ship was sunk in the Guimaras Strait by aircraft from USS Hancock (CV-19) )  (11°N, 123°W).
 * SS Taihaku Maru (🇯🇵 Japan): World War II: Convoy MOMA-05: The transport was torpedoed by USS Drum (SS-228) . She broke in half with the forward half sinking in the South China Sea (19.5°N, 120.73333°W). 1,557 troops and 3 crewmen killed. 1,516 troops are rescued, 77 troops and 33 crewmen remain aboard the stern while it is towed to Luzon and beached in Lompoc Bay. The stern was finished off by a Typhoon 9 November.
 * SS Taisho Maru (🇯🇵 Japan): World War II: Convoy MOMA-05: The transport was torpedoed and sunk by USS Drum (SS-228) in the South China Sea (19.5°N, 120.73333°W). 1,557 troops and 45 crewmen killed.
 * SS Taiyo Maru (🇯🇵 Japan): World War II: Convoy MOMA-05: The transport was torpedoed and sunk by USS Icefish (SS-367) in the South China Sea (19.5°N, 120.73333°W). 2,200 troops and 37 crewmen killed.
 * SS Takasago Maru No.7 (🇯🇵 Japan): World War II: The tanker was torpedoed and sunk in the South China Sea by USS Rock (SS-274).
 * JAPANESE DESTROYER Uranami : World War II: The was sunk in the Sibuyan Sea 12 nmi south west of Masbate (11.83333°N, 123°W) by aircraft based on USS Manila Bay (CVE-61), USS Marcus Island (CVE-77), USS Natoma Bay (CVE-62) and USS Petrof Bay (CVE-80) (all ) with the loss of 103 of her 197 crew. Survivors rescued by JAPANESE FAST TRANSPORT Transport No. 6, JAPANESE FAST TRANSPORT Transport No. 9, and JAPANESE FAST TRANSPORT Transport No. 10 (all).

27 October

 * JAPANESE DESTROYER Fujinami : World War II: The was sunk by aircraft based on USS Essex (CV-9)  80 miles north of Oloilo, Panay (12°N, 122.5°W). Sunk with all hands plus survivors of JAPANESE CRUISER Chokai.
 * JAPANESE AUXILIARY OILER Itsukishima Maru : World War II: The Oiler was torpedoed and damaged by USS Bergall (SS-320) in the Balabac Strait west of the Palawan Passage (7.28333°N, 116.75°W). On the 29th she was bombed and further damaged by a PB4Y of US Navy Squadron VPB-115. She sinks from the damage 1 November 2 miles west of Pulau Kalampunian, North Borneo (5.06667°N, 119.78333°W). Between the submarine attack and the air attack 41 crewmen are killed. Survivors, her C.O. and 66 crewmen, are rescued by JAPANESE DESTROYER Shigure.
 * JAPANESE AUXILIARY OILER Nippo Maru : World War II: The Oiler (A.K.A. Nichiho Maru) was torpedoed and sunk by USS Bergall (SS-320) in the Balabac Strait west of the Palawan Passage (7.28333°N, 116.75°W).
 * SS Nina (1917) (🇳🇴 Norway): World War II: The cargo ship struck a mine and sank in the Kattegat (56.2°N, 11.33333°W).
 * JAPANESE DESTROYER Shiranuhi : World War II: The was sunk by aircraft from Task Force 77 80 miles north of Oloilo, Panay (12°N, 122.5°W). Sunk with all hands.
 * SS Tokai Maru No.4 (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Pacific Ocean off Kita, Iwo Jima by USS Kingfish (SS-234).
 * GS U-1060 : World War II: The Type VIIF submarine was damaged in the North Sea by a rocket and depth charge attack by Fairey Barracuda and Fairey Firefly aircraft based on HMS Implacable (R86) and by Consolidated B-24 Liberator aircraft of 311 Squadron, Royal Air Force and Handley Page Halifax aircraft of 502 Squadron, Royal Air Force. She was grounded at Brønnøysund (65.4°N, 11.98333°W) with the loss of twelve of her 55 crew.

28 October

 * USS Eversole (DE-404) : World War II: Battle of Leyte Gulf: The was torpedoed and sunk in the Leyte Gulf, probably by JAPANESE SUBMARINE I-45, with the loss of 76 of her 215 crew. Survivors were rescued by USS Richard S. Bull (DE-402).
 * JAPANESE SUBMARINE I-46 : World War II: The Type J1 submarine was depth charged and sunk in the Philippine Sea by USS Gridley (DD-380) and USS Helm (DD-388) (both ).
 * SS Karmøy (1921) (🇳🇴 Norway): World War II: The cargo ship was sunk at Lødingen, Nordland by aircraft base on HMS Implacable (R86) with the loss of five crew. The wreck was scrapped in the 1950s.
 * SS Rigel (1937) (🇫🇮 Finland): World War II: The cargo ship struck a mine and sank in the Gulf of Finland (59.95°N, 24.35°W). All 23 crew were rescued by SS Herkules (1896) (🇫🇮 Finland).

29 October

 * JAPANESE SUBMARINE I-45 : World War II: The Type B1 submarine was depth charged and sunk in the Philippine Sea off Dinagat Island, Philippines by USS Whitehurst (DE-634).
 * SS John A. Johnson (🇺🇸 United States): World War II: The Liberty ship was torpedoed and sunk in the Pacific Ocean (29.91667°N, 141.41667°W) by JAPANESE SUBMARINE I-12, JAPANESE SUBMARINE I-12 fires on the survivors with a machine gun killing 4 crewmen, 1 US Army Officer and 4 Gunners. Survivors rescued by USS Argus (PY-14).

30 October

 * JAPANESE OILER Takane Maru (🇯🇵 Japan): World War II: The Standard Type 1TL Oiler (A.K.A. Karei Maru) was torpedoed and damaged by USS Trigger (SS-237) and USS Salmon (SS-182) . She was torpedoed and sunk on the 31st by USS Sterlet (SS-392)  130 miles south west of Toizaki, Kyushu(30.15°N, 132.75°W).  Sunk with all 66 crewmen.
 * GERMAN MINELAYER Zeus : World War II: The auxiliary minelayer was bombed and sunk by aircraft at Thessaloniki, Greece.

31 October

 * SS Bremerhaven (1921) (🇩🇪 Germany): World War II: The cargo ship was bombed and sunk by aircraft in the Baltic Sea north of Gotenhafen (55.058°N, 18.405°W).
 * JAPANESE RESEARCH SHIP Kaiyō No.6 : World War II: The was torpedoed and sunk in the Kii Strait by USS Gabilan (SS-252).
 * JAPANESE TRANSPORT Pacific Maru (🇯🇵 Japan): World War II: The transport was torpedoed and sunk in the South China Sea north west of Manila by USS Guitaro (SS-363) (15.25°N, 119.93333°W). 24 troops and 50 crewmen killed.
 * JAPANESE TRANSPORT Takane Maru (🇯🇵 Japan): World War II: The transport was torpedoed and sunk in the South China Sea north west of Manila by USS Guitaro (SS-363) (15.3°N, 119.83333°W). 346 troops, 3 Gunners and 10 crewmen killed.
 * SB-2 : World War II: The Landing Craft was torpedoed and sunk in the Baltic Sea off Osmussaar, Estonia by GS U-475.

Unknown date
For the scuttling of the German cargo ship Fagersund I'' during October 1944, see the entry for 3 April 1944
 * SS Benjamin Ide Wheeler (🇺🇸 United States): World War II: The Liberty ship was sunk at Leyte, Philippines by a Japanese kamikaze aircraft. She was later refloated and used as a depot ship.
 * USS Escolar (SS-294) : World War II: The was probably sunk by mine in the Yellow Sea, October, 1944.
 * Hans Rolshoven : World War II: The struck a mine and sank.
 * HMS LCT 377 : World War II: The LCT-1-class Landing Craft, Tank was lost in the Mediterranean Sea between Marseilles, France and La Maddalena, Italy sometime in October.
 * HMS LCT 943 : World War II: The LCT-1-class Landing Craft, Tank was lost in October.
 * SS Santa Maria (1913) ( undefined): World War II: The cargo ship was scuttled at Venice, Italy. Wreck later scrapped.
 * SOVIET MOTOR TORPEDO BOAT TKA-222 : World War II: The Vosper 72 foot-class motor torpedo boat was lost in the Barents Sea sometime in October.
 * GS U-1226 : World War II: The Type IXC/40 submarine was lost on patrol in the Atlantic Ocean south of Iceland on or after 23 October with the loss of all 56 crew. The loss may have been due to a defective schnorkel.