List of shipwrecks in March 1945

The list of shipwrecks in March 1945 includes ships sunk, foundered, grounded, or otherwise lost during March 1945.

1 March

 * SS Daishin Maru (🇯🇵 Japan): World War II: The Transport was  sunk off  Kuji Bay, Amami-o-Jima in the Pacific Ocean  by U.S. Navy aircraft from Task Force 38. 60 s and 2 crewmen killed.
 * USS Hannibal (AG-1) : The collier was bombed and sunk as a target in Chesapeake Bay.
 * SS Hoshi Maru No. 11 (🇯🇵 Japan): World War II: The Transport was  sunk in the Pacific Ocean  by U.S. Navy aircraft from Task Force 38.
 * JAPANESE SUPPLY SHIP Kenizaki : World War II: The Supply ship was sunk in the Pacific Ocean (28.16667°N, 129.08333°W) by U.S. Navy aircraft from Task Force 38.
 * SS Kinzan Maru (🇯🇵 Japan): World War II: The transport was sunk off  Kuji Bay, Amami-o-Jima in the Pacific Ocean  by U.S. Navy aircraft from Task Force 38. 2 Gunners killed.
 * SS Maddalena G. ( undefined): World War II: The cargo ship was scuttled at Lido di Venezia, Italy. Scrapped in 1946.
 * JAPANESE TORPEDO BOAT Manazuru : World War II: The was sunk off  Naha, Okinawa in the Pacific Ocean (26.28333°N, 127.58333°W) by U.S. Navy aircraft from Task Force 38.
 * SS Robert L. Vann (🇺🇸 United States): World War II: The Liberty ship struck a mine and sank in the North Sea off Ostend, West Flanders, Belgium (51.38333°N, 2.85°W).
 * SS Taiken Maru (🇯🇵 Japan): World War II: The Transport was  sunk off  Miyako Jima in the Pacific Ocean (24.38333°N, 124.2°W) by U.S. Navy aircraft from Task Force 38. 20 passengers and 16 crewmen killed.
 * SS Toyosako Maru (🇯🇵 Japan): World War II: The Transport was  sunk off  Miyako Jima in the Pacific Ocean (24.38333°N, 124.2°W) by U.S. Navy aircraft from Task Force 38.  4 crewmen killed.
 * JAPANESE MINELAYER Tsubame : World War II: The was torpedoed and sunk off  Miyako Jima in the Pacific Ocean (24.38333°N, 124.2°W) by U.S. Navy aircraft from Task Force 38.

2 March

 * SOVIET PATROL CRAFT BO-224 : World War II: The patrol craft was torpedoed and sunk in the Barents Sea (69.35°N, 33.63333°W) by GS U-995 with the loss of seven of her 31 crew.
 * MV King Edgar (🇬🇧 United Kingdom): World War II: Convoy SC 167: The cargo ship was torpedoed and sunk in St. George's Channel (52.08333°N, -5.7°W) by GS U-1302 with the loss of four of her 46 crew. Survivors were rescued by HMS Nyasaland (K587).
 * USS LCT-1029 (LCT-1029) : World War II: The was holed in the engine room when she struck a submerged wreck. She was driven ashore on Iwo Jima and abandond.
 * SS Novasli (🇳🇴 Norway): World War II: Convoy SC 167: The cargo ship was torpedoed and damaged in the Bristol Channel (51.78333°N, -5.53333°W) by GS U-1302 . All 36 crew were rescued by HMT Helier II (FY312), which scuttled the ship.
 * GS U-3519 : World War II: The Type XXI submarine struck a mine and sank in the Baltic Sea off Warnemünde, Mecklenburg-Vorpommern (54.18333°N, 12.08333°W) with the loss of 75 of her 78 crew.

3 March

 * JAPANESE OILER Hario : World War II: The fleet oiler struck a mine in Yulinakin Bay off Cape Bastion, Hainan Island (18.16667°N, 109.66667°W). She sank the next day.
 * GERMAN CRUISER Köln : World War II: The cruiser was bombed and sunk by aircraft at Wilhelmshaven, Germany. The wreck was broken up in 1946.
 * HMT Southern Flower : World War II: The naval trawler was torpedoed and sunk by GS U-1022 in the Atlantic Ocean off Reykjavík, Iceland (64.08333°N, -23.25°W).
 * HMAS Steady Hour : The patrol boat was destroyed in a fire off Darwin, Australia

4 March

 * JAPANESE AUXILIARY TANKER Palembang Maru : World War II: The Auxiliary Tanker was torpedoed and sunk off  Cap Varella, French Indochina (12.86667°N, 103.5°W) by USS Baya (SS-318)  . 67 crewmen, 59 Gunners and 9 passengers were killed.
 * JAPANESE SUBMARINE CHASER CH-8 : World War II: The was shelled and sunk in the Malacca Strait  (4.06667°N, 110.58333°W)  by HMS Terrapin (P323) and HMS Trenchant (P331) (both ). 108 survivors.
 * GS U-3508 : World War II: The Type XXI submarine was bombed and sunk at Wilhelmshaven, Lower Saxony in an Allied air raid.

5 March

 * USS LCS(L)-127 (LCS(L)-127) : World War II: The Landing Craft, Support, Large grounded on San Clemente Island, California. Declared a Total Loss.
 * MS Nagara Maru (1940) ( Empire of Japan): World War II: The cargo ship was torpedoed and sunk south-west of the Masalembu Islands, Dutch East Indies in the Java Sea (-5.68333°N, 114.01667°W) by USS Sea Robin (SS-407).
 * JAPANESE MINESWEEPER W-15 : World War II: The was torpedoed in the stern off Akuseki Jima, Ryuku Islands (29.6°N, 129.75°W)  by USS Tilefish (SS-307)   and beached on Suwasi Island. Declared a Constructive Total Loss.
 * JAPANESE AUXILIARY OILER Ryoei Maru : World War II: The oiler was torpedoed and sunk north-east of Tourane, French Indochina in the South China Sea (16.76667°N, 108.68333°W) by USS Bashaw (SS-241).

6 March

 * SS Albert Ballin (🇩🇪 Germany): World War II: The ocean liner struck a mine and sank off Warnemünde, Germany. Salvaged c. 1949 and returned to service by the Soviet Union.
 * SS Empire Geraint (🇬🇧 United Kingdom): World War II: The tanker was torpedoed and damaged at Milford Haven, Pembrokeshire by GS U-775 . She was beached with her back broken. Refloated on 30 April, repaired and returned to service.
 * SS Greenhill Park (🇨🇦 Canada): The Park ship was damaged by fire at Vancouver, British Columbia. She was declared a constructive total loss but was repaired and re-entered service in 1946 as the Panamanian-flagged Phaeax II.
 * SS Robert Mohring (1923) (🇩🇪 Germany): World War II: The passenger/cargo ship was bombed and sunk by aircraft at Sassnitz, Germany.
 * XE 11 : The midget submarine collided with a Royal Navy boom defence vessel in Loch Striven with the loss of two of her four crew.
 * GERMAN DESTROYER Z28 : World War II: The destroyer was bombed and sunk by aircraft in the Baltic Sea.

7 March

 * GS U-1302 : World War II: The Type VIIC/41 submarine was depth charged and sunk in St. George's Channel (52.31667°N, -5.38333°W) by HMCS La Hulloise (K668), HMCS Strathadam (K682) and HMCS Thetford Mines (K459) (all ) with the loss of all 48 crew.

8 March

 * SS Benjamin R. Milam (🇺🇸 United States): World War II: The Liberty ship sank off Baltimore, Maryland following an explosion in her engine room. She was refloated, repaired and returned to service.
 * JAPANESE COAST DEFENCE FRIGATE CD-69 : World War II: The Coast Defence Frigate was bombed by a 14th Air Force B-24 off the east coast of Hainan Island (19.03333°N, 110.93333°W) taking a bomb down the funnel and blowing out the bottom of the ship. 3 Officers and 23 crewmen killed and 30 wounded. After emergency strengthening of the hull she was being towed to Hong Kong when she broke in two and sank 8 miles off Hong Kong on March 16 at (22°N, 113.66667°W).
 * SS Lornaston (🇬🇧 United Kingdom): World War II: Convoy ONA 289: The cargo ship was torpedoed and sunk in the English Channel off Fécamp, Seine-Maritime, France (50.58333°N, -0.5°W) by GS U-275 . All 48 crew were rescued by HMS Holmes (K581) and HMS Palencia (both ).

9 March

 * SS Borbeck (1923) (🇩🇪 Germany): World War II: The cargo ship was torpedoed and sunk by aircraft and submarines north-east of Hel, Poland.
 * GERMAN MINESWEEPER M-412 : World War II: Granville Raid: The minesweeper ran aground at Granville, France, and was scuttled.
 * GERMAN HOSPITAL SHIP Meteor II : World War II: The hospital ship was being used as a troopship against the rules of war. She was bombed and sunk at Pillau, East Prussia by Soviet Air Force aircraft with the loss of 24 of the 300 people on board.

10 March

 * FRENCH AVISO Amiral Charner (🇫🇷 Vichy French Navy): World War II: The Colonial Sloop was scuttled at My Tho, French Indochina.
 * SS Baron Jedburgh (🇬🇧 United Kingdom): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean north east of Bahia, Brazil (-10.03333°N, -25°W) by GS U-532 with the loss of one of her 59 crew. Survivors were rescued by SS Sandown Castle (🇬🇧 United Kingdom) or reached land in their lifeboats.
 * JAPANESE TRANSPORT Dokai Maru : World War II: The Transport was torpedoed and sunk north of  Amami O-Shima (29.8°N, 128.03333°W) by USS Kete (SS-369)  . 27 crewmen, 23 Gunners and 4 passengers were killed.
 * JAPANESE TRANSPORT Keizan Maru : World War II: The Transport was torpedoed and sunk north of  Amami O-Shima (29.41667°N, 127.5°W) by USS Kete (SS-369) . 43 crewmen and 64 troopss were killed.
 * FRENCH AVISO Marne (🇫🇷 Vichy French Navy): World War II: The Gunboat was scuttled at Can Tho, French Indochina . Raised and scrapped 1957.
 * SS Nordfahrt (🇩🇪 Germany): World War II: The cargo ship was sunk. Raised and repaired in 1949.
 * HNOMS Nordhav II (FY1906) : World War II: Convoy FS 1753: The auxiliary minesweeper was torpedoed and sunk in the North Sea off Dundee, Perthshire, United Kingdom (56.68333°N, -2.06667°W) by GS U-714 with the loss of six of her 23 crew. Survivors were rescued by HNOMS Syrian.
 * JAPANESE TRANSPORT Sanka Maru : World War II: The Transport was torpedoed and sunk north of  Amami O-Shima (29.41667°N, 128.25°W) by USS Kete (SS-369)  . 51 crewmen and 605 troops were killed.
 * JAPANESE OILER Seishin Maru : World War II: The oiler was sunk in Tourane Bay, French Indochina in the South China Sea (16.01667°N, 106.16667°W) by 5th Air Force B-25s of the 500th Bomb Squadron, 345th Bomb Group.
 * GS U-275 : World War II: The Type VIIC submarine struck a mine and sank in the English Channel off Newhaven, East Sussex, United Kingdom (50.6°N, 0.06667°W) with the loss of all 48 crew.
 * GS U-681 : World War II: The Type VIIC submarine was depth charged and sank in the Atlantic Ocean west of the Isles of Scilly, United Kingdom (49.86667°N, -6.63333°W) by a Consolidated B-24 Liberator aircraft of the United States Navy with the loss of eleven of her 49 crew.

11 March

 * SS Carl (🇩🇪 Germany) World War II: The cargo ship was sunk in an Allied air raid at Hamburg.
 * SS Electra (1919) (🇩🇪 Germany): The cargo ship was bombed and sunk by aircraft at Hamburg, Germany.
 * GERMAN MINESWEEPER M-2 : World War II: The minesweeper was sunk by rocket-armed aircraft off Fedjefjord, Norway.
 * GERMAN MINESWEEPER M-266 : World War II: The minesweeper was bombed and sunk by aircraft at Kiel, Germany. Later scrapped.
 * GERMAN MINESWEEPER M-804 : World War II: The minesweeper was bombed and sunk by aircraft at Mönkeberg, Germany.
 * GERMAN MINESWEEPER M-805 : World War II: The minesweeper was bombed and sunk by aircraft at Heikendorf, Germany.
 * MV Orion (1935) (🇩🇪 Germany): World War II: The tanker was sunk in an Allied air raid at Hamburg. Raised post-war, repaired and returned to service for her Norwegian owners.
 * GS U-682 : World War II: The Type VIIC submarine was destroyed at Hamburg in an American air raid.
 * GS U-1201 : World War II: The Type VIIC submarine was severely damaged at Hamburg in an American air raid. She was consequently scuttled on 3 May.

12 March

 * SS Gerrit Fritzen (1921) (🇩🇪 Germany): World War II: The cargo ship was bombed and sunk by aircraft off Fehmarn in the Baltic Sea.
 * GERMAN DEPOT SHIP MRS-4 : World War II: The depot ship was torpedoed and sunk off the Kvaløytå Lighthouse, Haugesund, Rogaland (59.41667°N, 5.25°W) by HNOMS MTB-711 with the loss of 86 of her 156 crew.
 * SS Rolandseck (1936) : World War II: The troop ship was sunk in an air attack near Skagen, Denmark.
 * GS U-260 : World War II: The Type VIIC submarine struck a mine and sank in the Atlantic Ocean south of Ireland. All 48 crew survived.

13 March

 * JAPANESE ESCORT CD-66 : World War II: The  Coast Defence Frigate was sunk east of  Swatow, China off Nanoshima in the South China Sea (23.5°N, 117.16667°W) by B-25s of the 341st Bomb Group, 14th Air Force. 175 crewmen killed
 * SS Masashima Maru (🇯🇵 Japan): World War II: The Transport was sunk east of Swatow, China off Nanoshima in the South China Sea (23.5°N, 117.16667°W) by B-24s of the  5th Air Force. 15 crewmen, 19 Guards and 8 passengers killed
 * SS Russell H. Crittenden (🇺🇸 United States): The Liberty ship was wrecked on the coast of New Guinea (-5.91667°N, 149.16667°W).
 * HMS Sealion (72S) : The S-class submarine was scuttled as an ASDIC target off the Isle of Arran, Scotland.
 * SS Taber Park (🇬🇧 United Kingdom): World War II: The Park ship was torpedoed and sunk in the North Sea (52.36667°N, 1.88333°W) by a Kriegsmarine midget submarine.

14 March

 * GERMAN TRAINING SHIP Hugo Zeye : World War II: The training ship struck a mine and sank off Fehmarn, Germany.
 * SS Magne (🇸🇪 Sweden): World War II: The cargo ship was torpedoed and sunk in the North Sea off St Abb's Head, Berwickshire, United Kingdom (55.86667°N, -1.98333°W) by GS U-714 with the loss of ten of her 21 crew. Survivors were rescued by MV Acclivity (🇬🇧 United Kingdom).
 * GERMAN TORPEDO BOAT T-3 : World War II: The torpedo boat struck a mine and sank off Hela, Danzig-West Prussia (54.65°N, 18.78333°W).
 * GERMAN TORPEDO BOAT T-5 : World War II: The torpedo boat struck a mine and sank off Hela, Danzig-West Prussia (54.65°N, 18.78333°W).
 * GS U-714 : World War II: The Type VIIC submarine was depth charged and sunk in the North Sea off Eyemouth, Berwickshire, United Kingdom (55.95°N, -1.95°W) by HMSAS Natal and HMS Wivern (D66)  with the loss of all 50 crew.
 * GS U-1021 : World War II: The Type VIIC/41 submarine struck a mine and sank in the Bristol Channel off Newquay, Cornwall, United Kingdom (50.66333°N, -5.09444°W) with the loss of all 43 crew.

15 March

 * USS Lancetfish (SS-296) : The sank at Boston Navy Yard, Boston, Massachusetts. She was raised on 23 March and decommissioned the next day, subsequently being allocated to the Atlantic Reserve Fleet.

16 March
For sinking of I.J.N. Coast Defence Frigate CD-69 on this date see March 8, 1945
 * SS Inger Toft (🇬🇧 United Kingdom): World War II: Convoy RU 156: The cargo ship was torpedoed and sunk in the Atlantic Ocean (57.41667°N, -6.86667°W) by GS U-722 . All 30 crew were rescued by HMS Grenadier (T334).
 * SS Sibigo (1926) (🇳🇱 Netherlands): World War II: Dutch Koninklijke Paketvaart-Maatschappij (KPM) ship under charter to the British Ministry of War Transport allocated through the War Shipping Administration to the United States Army permanent local fleet in the Southwest Pacific Area, number X 25, lost in cyclone in the Coral Sea off Port Douglas, Queensland with 13 of 85 crew members rescued.
 * GS U-367 : World War II: The Type VIIC submarine struck a mine and sank in the Baltic Sea (54.41667°N, 18.83333°W) with the loss of all 50 crew.
 * GERMAN PATROL BOAT UJ-1105 : World War II: The patrol boat was bombed and sunk by aircraft in the Skagerrak.

17 March

 * HMCS Guysborough (J52) : World War II: The was torpedoed and sunk in the Bay of Biscay by GS U-868  with the loss of 51 of her crew. About 40 survivors were rescued by HMS Inglis (K570).
 * JAPANESE CARGO SHIP Ikomasan Maru : World War II: The cargo ship was damaged by USS Spot (SS-413) off Fuchow, China and beached on Matsu Island, China in the South China Sea (25.96667°N, 119.96667°W) . 7 passengers, 4 Gunners and 6 crew are lost. Later in the day she is bombed by B-25s killing another 5 crewmen. The ship is bombed again on 26 March by B-24s and destroyed.
 * SS Iris (1921) (🇩🇪 Germany): World War II: The cargo ship was bombed and sunk at Ålesund, Møre og Romsdal, Norway by Allied aircraft.
 * SS Log (🇳🇴 Norway): World War II: The cargo ship was bombed and sunk at Ålesund by Allied aircraft.
 * SS Margarethe Cords (🇩🇪 Germany): World War II: The cargo ship was torpedoed and sunk by a submarine in the Baltic Sea, south of Bornholm, Denmark (54.8°N, 15°W).
 * JAPANESE CARGO SHIP Nanking Maru : World War II: The cargo ship was sunk by USS Spot (SS-413) off Fuchow, China in the South China Sea (25.55°N, 120.16667°W). Of 503 on board, 411 passengers, 32 gunners and 60 crew, 502 are lost.
 * SS Rimage (🇩🇪 Germany): World War II: The cargo ship was bombed and sunk by aircraft off Ålesund.
 * SS Samui (🇹🇭 Thailand): World War II: The coastal tanker was torpedoed and sunk in the Gulf of Siam by USS Sealion (SS-315).

18 March

 * JAPANESE AUXILIARY Kamo Maru : World War II: The auxiliary sailing ship was sunk by U.S. Navy aircraft from Task Force 58 of off Noma Misaki in the East China Sea (31.4°N, 130.11667°W).
 * JAPANESE TRANSPORT Kenyo Maru : World War II: The Transport was sunk by U.S. Navy aircraft from Task Force 58 of off Noma Misaki in the East China Sea (31.4°N, 130.11667°W).
 * JAPANESE TANKER Nansei Maru No. 1 : World War II: The Tanker was sunk by U.S. Navy aircraft from Task Force 58 of off Noma Misaki in the East China Sea (31.4°N, 130.11667°W).
 * JAPANESE AUXILIARY Tenjin Maru : World War II: The auxiliary sailing ship was sunk by U.S. Navy aircraft from Task Force 58 of off Noma Misaki in the East China Sea (31.4°N, 130.11667°W).
 * NO.1-CLASS LANDING SHIP Transport No. 18 : World War II:  The  was torpedoed and sunk In the East China Sea off Aguni Island, Okinawa  (26.55°N, 127.18333°W)  by  USS Springer (SS-414).
 * SS Tsukushi Maru No.3 (🇯🇵 Japan): World War II: The cargo ship was torpedoed and sunk in the Pacific Ocean off the Ryukyu Islands by USS Trigger (SS-237).
 * GS U-866 : World War II: The Type IXC/40 submarine was depth charged and sunk in the Atlantic Ocean (43.3°N, -61.13333°W) by USS Lowe (DE-325), USS Menges (DE-320), USS Mosley (DE-321) and USS Pride (DE-323) (all ) with the loss of all 55 crew.

19 March

 * SS Astrida (🇧🇪 Belgium): The cargo liner foundered in the Atlantic Ocean 58 nmi south east of Port Elizabeth, South Africa during a hurricane with the loss of 88 passengers and crew.
 * SS Empire Blessing (🇬🇧 United Kingdom): World War II: The cargo ship struck a mine and sank in the Scheldt, Belgium.
 * JAPANESE TRANSPORT Hakozaki Maru : World War II: The Transport was torpedoed and sunk in the East China Sea north-north-east of Shanghai .(33.11667°N, 122.08333°W)  by USS Balao (SS-285), 928 passengers, 51 Gunners and 139 crewmen were lost.
 * JAPANESE AIRCRAFT CARRIER Ryūhō : World War II: The aircraft carrier was bombed and damaged in the Pacific Ocean off Kure by American aircraft with the loss of twenty of her 989 crew. She was declared a total loss and was scrapped in 1946.
 * SS Samselbu (🇬🇧 United Kingdom): World War II: The Liberty ship struck a mine and sank in the North Sea off the coast of Belgium (51.38333°N, 3.1°W).
 * JAPANESE OILER Sarawak Maru : World War II: The Oiler struck a mine in the South China Sea 10 miles  north of the Horsburgh Light, Singapore . She is beached on Bintan Island(1.41667°N, 104.6°W). On 21 March 1945 she capsizes and sinks.
 * SS Sirius (1922) (🇩🇪 Germany): World War II: The cargo ship was torpedoed and sunk by HMS Venturer (P68).
 * JAPANESE GUNBOAT Suma : World War II: The River Gunboat was sunk on the Yangtze River 50 miles north of Kiangyin China (32°N, 120°W) by a mine. 8 crewmen lost

20 March

 * SS Horace Bushnell (🇺🇸 United States): World War II: Convoy JW 65: The Liberty ship was torpedoed and damaged in the Barents Sea 25 nmi north east of the North Kilden Lighthouse, Soviet Union (69.38333°N, 35.28333°W) by GS U-995 with the loss of five of her 69 crew. Survivors were rescued by HMS Orwell (G98) . Horash Bushnell was beached at Teriberski and abandoned. Salvaged in 1949, repaired and entered Soviet service as Pamyati Kirova.
 * SS Hosen Maru (🇯🇵 Japan): World War II: The Tanker was torpedoed and sunk in the South China Sea south of Cam Rahn Bay French Indochina.(11.3°N, 108.95°W)  by USS Blenny (SS-324)  .170 passengers, 8 Gunners, and 18 crewmen killed.
 * JAPANESE AUXILIARY SUBMARINE CHASER Kainan Maru : World War II: The Auxiliary Sub Chaser was torpedoed and sunk in the South China Sea south of Cam Rahn Bay French Indochina.(12°N, 109.28333°W)  by USS Baya (SS-318).
 * HMS Lapwing (U62) : World War II: Convoy JW 65: The sloop was torpedoed and sunk in the Kola Inlet (69.48333°N, 33.73333°W) by GS U-968  with the loss of 168 of her 229 crew. Survivors were rescued by HMS Savage (G20).
 * HMS LST-80 (LST-80) : World War II: The Landing Ship, Tank was sunk by a mine off Ostend, Belgium.
 * GERMAN MINESWEEPER M-15 : World War II: The minesweeper was bombed and sunk at Kiel, Germany.
 * GERMAN MINESWEEPER M-16 : World War II: The minesweeper was bombed and sunk at Kiel, Germany. Scuttled on 18 May 1945.
 * SS Nanshin Maru No. 21 (🇯🇵 Japan): World War II: The Tanker was torpedoed and sunk in the South China Sea south of Cam Rahn Bay French Indochina.(11.3°N, 108.95°W)  by USS Blenny (SS-324)  .14 crewmen killed.
 * SS Thomas Donaldson (🇺🇸 United States): World War II: Convoy JW 64: The Liberty ship was torpedoed and damaged in the Barents Sea off Murmansk, Soviet Union (69.48333°N, 33.73333°W) by GS U-968 with the loss of four of her 69 crew. Survivors were rescued by HMS Bamborough Castle (K412), HMS Honeysuckle (K27) and HMS Oxlip (K123) (all ). Thomas Donaldson was taken in tow but foundered off Kilden Island (68.44167°N, 33.73889°W)
 * GS U-1003 : World War II: The Type VIIC/41 submarine attempted to ram HMCS New Glasgow (K320) in the Atlantic Ocean but was severely damaged in the process. She was scuttled three days later (55.41667°N, -6.88333°W) with the loss of seventeen of her 48 crew. Survivors were rescued by HMCS Thetford Mines (K459).
 * MV Venus (1931) : World War II: The target ship was bombed and sunk at Hamburg by Allied aircraft. Raised post-war, repaird and returned to Norwegian service in May 1948.

21 March

 * JAPANESE SUBMARINE CHASER CH-33 : World War II: The was sunk off Nha Trang, French Indochina in the South China Sea (12.5°N, 109.23333°W)  by U.S. Army 5th Air Force B-25s of the 345th Bomb Group. The Comanding Officer and 7 crewmen killed, 222 wounded.
 * SS Fushimi Maru No. 2 (🇯🇵 Japan): World War II: The cargo ship was sunk off Nha Trang, French Indochina in the South China Sea (12.5°N, 109.23333°W) by U.S. Army 5th Air Force B-25s of the 345th Bomb Group. 3 crewmen and 11 others killed.
 * SS James Eagan Layne (🇺🇸 United States): World War II: Convoy BTC 103: The Liberty ship was torpedoed and damaged in the English Channel off Plymouth, Devon, United Kingdom (50.21667°N, -4.08333°W) by GS U-399. She was beached at Whitesand Bay but declared a constructive total loss. All 69 crew survived.
 * SS Motoyama Maru No. 1 (🇯🇵 Japan): World War II: The cargo ship (A.K.A. Genzan Maru No. 1) was sunk off Nha Trang  French Indochina in the South China Sea (12.5°N, 109.23333°W)  by U.S. Army 5th Air Force B-25s of the 345th Bomb Group. 4 crewmen killed.
 * SS John R. Park (🇺🇸 United States): World War II: Convoy TBC 102: The Liberty ship was torpedoed and sunk in the Atlantic Ocean 9 nmi off Lizard Head, Cornwall, United Kingdom (49.93333°N, -5.43333°W) by GS U-1195 . All 75 crew were rescued by SS American Press (🇺🇸 United States) and a Royal Air Force rescue launch.
 * JAPANESE MINELAYER Tateishi : World War II: The minelayer was sunk off Nha Trang, French Indochina in the South China Sea (11.83333°N, 109.3°W) by U.S. Army 5th Air Force B-25s of the 345th Bomb Group.

22 March

 * SS Empire Kingsley (🇬🇧 United Kingdom): World War II: Convoy TBC 103: The cargo ship was torpedoed and sunk in the Atlantic Ocean (50.13333°N, -5.85°W) by GS U-315 with the loss of eight of her 57 crew. Survivors were rescued by HMT Fir.
 * SS Frankfurt (1914) (🇩🇪 Germany): World War II: The cargo ship struck a mine and sank off the Hel Peninsula, Germany.
 * JAPANESE SUBMARINE I-371 : World War II: The Type D submarine was depth charged, rammed and sunk in the Pacific Ocean off Okinawa by USS Haggard (DD-555).
 * HMS MTB 655 (MTB 655) : World War II: The Motor Torpedo Boat struck a mine and sank in the Adriatic Sea.
 * SS Mendoza (1920) (🇩🇪 Germany): World War II: The cargo ship was sunk in the Baltic Sea off Pillau, East Prussia, Germany in a Soviet air attack.

23 March

 * SS Charles D. McIver (🇺🇸 United States): World War II: The Liberty ship either struck a mine or was torpedoed and sunk in the North Sea off Ostend, West Flanders, Belgium (51.38333°N, 3.08333°W).
 * SS Eleftheria (🇺🇸 United States): World War II: The Liberty ship struck a mine and was damaged in thye North Sea off Ostend. She was beached but broke in two. The wreck was dispersed in 1952.
 * GERMAN BATTLESHIP Gneisenau : World War II: The was sunk as a blockship in Gdynia harbor, Poland. She was later refloated and scrapped.
 * SS Kachosan Maru : World War II: The Transport was bombed and sunk in the East China Sea off Sotsukozaki, Amami Oshima by US Navy aircraft .1300 troops, 62 Gunners, and 60 crewmen killed.
 * SS Lysaker (1919) (🇳🇴 Norway): World War II: The coaster was bombed and sunk at Sandshamn, Møre og Romsdal by de Havilland Mosquito aircraft of 143 Squadron, Royal Air Force.
 * HMS MTB 705 (MTB 705) : World War II: The Motor Torpedo Boat struck a mine and sank in the Adriatic Sea.
 * JAPANESE SUBMARINE RO-41 : : World War II: The submarine was depth charged, rammed and sunk in the Pacific Ocean  (22.95°N, 132.31667°W) by USS Haggard (DD-555).
 * SS Utviken (🇳🇴 Norway): World War II: The cargo ship struck a mine and sank in the Kattegat off Sjællands Odde, Denmark.
 * GERMAN PATROL BOAT V-2022 : World War II: The patrol boat was torpedoed and sunk by a submarine in the Kattegat.

24 March

 * JAPANESE ESCORT CD-68 : World War II: The  Coast Defence Frigate was sunk in the East China Sea200 miles south-east of Shanghai (28.41667°N, 124.53333°W) by U.S. Navy aircraft from Task Force 58.
 * JAPANESE AUXILIARY MINESWEEPER Chitose Maru : World War II: The Auxiliary Minesweeper was sunk in the East China Sea, 200 miles south-east of Shanghai (28.41667°N, 124.53333°W) by U.S. Navy aircraft from Task Force 58.
 * JAPANESE CARGO SHIP Kaijo Maru (🇯🇵 Japan): World War II: The cargo ship was sunk in the East China Sea 200 miles south-east of Shanghai (28.41667°N, 124.53333°W) by U.S. Navy aircraft from Task Force 58.
 * JAPANESE CARGO SHIP Koshu Maru : World War II: The cargo ship was sunk in the East China Sea200 miles south-east of Shanghai (28.41667°N, 124.53333°W) by U.S. Navy aircraft from Task Force 58.
 * SS Monbaldo (1918) (🇩🇪 Germany): World War II: The cargo ship was bombed and sunk by aircraft at Stettin, Germany. Raised in 1950-1955 and taken into service until scrapped in 1969.
 * MS Robert Ley (🇩🇪 Germany): World War II: The passenger ship was bombed and sunk by aircraft at Hamburg, Germany. The wreck was scrapped at Inverkeithing, Scotland in June 1947.
 * SS Sarp (1916) (🇳🇴 Norway): World War II: The coaster was bombed and damaged at Egersund, Rogaland in an Allied air raid. She was beached on fire and was later condemned as a total loss. Repaired in 1945 and used as a barge before being scrapped later that year.
 * JAPANESE AUXILIARY MINESWEEPER Seki Maru : World War II: The Auxiliary Minesweeper was sunk in the East China Sea200 miles south-east of Shanghai (29.2°N, 125.21667°W) by B-24s, possibly U.S. Navy PB4Ys.
 * JAPANESE CARGO SHIP Soka Maru (🇯🇵 Japan): World War II: The cargo ship was sunk in the East China Sea 200 miles south-east of Shanghai (28.41667°N, 124.53333°W) by U.S. Navy aircraft from Task Force 58.
 * SS Thetis (1909) (🇩🇪 Germany): The cargo ship was bombed and sunk at Egersund in an Allied air raid. She was raised post-war, repaired and entered Norwegian service as Strømsøy.
 * JAPANESE TORPEDO BOAT Tomozuru : World War II: The Torpedo Boat was sunk in the East China Sea200 miles south-east of Shanghai (28.41667°N, 124.53333°W) by U.S. Navy aircraft from Task Force 58.
 * JAPANESE AUXILIARY MINESWEEPER Shonan Maru No. 16 : World War II: The Auxiliary Minesweeper was sunk in the East China Sea200 miles south-east of Shanghai (28.41667°N, 124.53333°W) by U.S. Navy aircraft from Task Force 58.
 * SS Tugela (1921) (🇩🇪 Germany): World War II: The cargo ship struck a mine and sank in the North Sea off Florø, Sogn og Fjordane, Norway.
 * GERMAN SUBMARINE CHASER UJ-1435 : World War II: The submarine chaser was bombed and sunk at Egersund in an Allied air raid. She was raised post-war.
 * SS Weser (1910) (🇩🇪 Germany): World War II: The cargo ship was sunk in an air raid at Neufahrwasser, Danzig, Germany.

25 March

 * SS Leda (1920) (🇳🇴 Norway): World War II: The passenger ship was shelled and sunk off the mouth of the Oder by Soviet shore-based artillery. Raised in December 1948 but declared a total loss. Sold in December 1949 for scrapping.
 * MV Pacific (1938) (🇳🇱 Netherlands): World War II: Convoy BTC 108: The coaster was torpedoed and sunk in the Bay of Falmouth (49.9°N, -5.28333°W) by GS U-399 with the loss of five of her ten crew.
 * SS Priamus (🇩🇪 Germany): World War II: The cargo ship was torpedoed and sunk by aircraft off Kristiansand, Norway.

26 March

 * SS Bille (🇩🇪 Germany): World War II: The cargo ship was bombed and sunk off Neufahrwasser, Germany.
 * JAPANESE SUBMARINE CHASER CH-34 : World War II: The was shelled and sunk east of Khota Andaman in the Andaman Sea (10.58333°N, 94.75°W)  by HMS Vigilant (R93) and HMS Virago (R75) (both ).
 * JAPANESE SUBMARINE CHASER CH-63 : World War II: The was torpedoed and sunk east of Khota Andaman in the Andaman Sea (10.58333°N, 94.75°W)  by HMS Vigilant (R93).
 * USS Halligan (DD-584) : World War II: The struck a mine and was damaged in the Pacific Ocean off the Ryuku Islands with the loss of about half of her crew. Survivors were rescued by USS PC-1128 and USS LSM(R)-194. The wreck came ashore the next day on Tokashiki.
 * SS Risui Maru : World War II: The Transport was shelled and sunk east of Khota Andaman in the Andaman Sea (10.58333°N, 94.75°W) by HMS Volage (R41).
 * SS Teshio Maru : World War II: The stores ship was bombed and sunk east of Khota Andaman in the Andaman Sea (10.58333°N, 94.75°W) by two  R.A.F. B-24s. 11 killed.
 * GS U-399 : World War II: The Type VIIC submarine was depth charged and sunk in the English Channel off Land's End, Cornwall, United Kingdom (49.93333°N, -5.36667°W) by HMS Duckworth (K351) with the loss of 46 of her 47 crew.
 * SMS Zähringen : World War II: The target ship was scuttled as a block ship in Gotenhafen.

27 March

 * JAPANESE REPAIR SHIP Odate : World War II: The repair ship was torpedoed and sunk in the Pacific Ocean off the Ryukyu Islands by USS Trigger (SS-237).
 * GS U-722 : World War II: The Type VIIC submarine was depth charged and sunk in the Atlantic Ocean west of Scotland (57.15°N, -6.91667°W) by HMS Byron (K508), HMS Fitzroy (K553) and HMS Redmill (K554) (all ) with the loss of all 44 crew.
 * GS U-905 : World War II: The Type VIIC submarine was depth charged and sunk in The Minch (58.56667°N, -5.76667°W) by HMS Conn (K509) with the loss of all 45 crew.

28 March

 * SS Asokawa Maru : World War II: The Tanker was bombed and sunk off Nha Trang, French Indochina . 92 passengers, 8 Gunners and 34 crewmen were killed.
 * JAPANESE ESCORT CD-33 : World War II: The was sunk south west of Shikoku in the Pacific Ocean (31.75°N, 131.83333°W) by U.S. Navy aircraft from Task Force 58. All 170 crewmen lost.
 * SS Honan Maru : World War II: The Tanker was torpedoed and damaged off Nha Trang French Indochina by USS Bluegill (SS-242)  and beached.
 * JAPANESE ESCORT Mikura : World War II: The was sunk south west of Shikoku in the Pacific Ocean (31.75°N, 131.83333°W) by USS Threadfin (SS-410)  . All 216 crewmen lost.
 * SS Oklahoma (1940) (🇺🇸 United States): World War II: The tanker was torpedoed and sunk in the Atlantic Ocean (13.61667°N, -41.71667°W) by GS U-532 with the loss of 50 of her 72 crew. Survivors were rescued by SS Delaware (1943) (🇺🇸 United States).
 * JAPANESE PATROL BOAT PB-108 : World War II: The Patrol Boat was sunk off Maniang Island, Celebes in the Gulf of Boni (-4.23333°N, 121.46667°W) by 13th Air Force B-24s. 69 crewmen killed, 9 wounded.
 * USS Skylark (AM-63) : World War II: The struck a mine and sank in the Pacific Ocean off Hagushi Bay, Okinawa with the loss of five of her 105 crew. Survivors were rescued by USS Tolman (DM-28).
 * USS Trigger (SS-237) : World War II: The was depth charged and sunk in the Pacific Ocean off the Ryukyu Islands (32.26667°N, 123.08333°W) by JAPANESE ESCORT SHIP Mikura, CD-33 and CD-59 (all ).
 * JAPANESE MINESWEEPER W-11 : World War II: The was sunk in Makassar Bay in the Makassar Strait (-5.1°N, 119.23333°W) by 13th Air Force B-24s. 69 crewmen killed, 9 wounded.

29 March

 * JAPANESE ESCORT CD-18 : World War II: The was bombed and sunk off Cape Varella, French Indochina (15.16667°N, 109.43333°W) by 5th Air Force B-25s.  184 Crewmen killed.
 * JAPANESE ESCORT CD-84 : World War II: The was torpedoed and sunk off Cape Varella, French Indochina (14.66667°N, 109.26667°W) by USS Hammerhead (SS-364).
 * JAPANESE ESCORT CD-130 : World War II: The was bombed and sunk off Nha Trang French Indochina (14.65°N, 109.26667°W) by 5th Air Force B-25s . All 178 Crewmen killed.
 * SS Kaiko Maru : World War II: The Tanker was bombed and sunk off Nha TrangFrench Indochina by  5th Air Force B-25s. 12 passengers, 4 Gunners and 19 Crewmen killed.
 * SS Kommandøren (🇳🇴 Norway): World War II: The cargo ship was torpedoed and sunk at Bergen by GERMAN TORPEDO BOAT S-13 with the loss of one crew member.
 * HMCS Teme (K458) : World War II: Convoy BTC 111: The was torpedoed and damaged in the Atlantic Ocean off Land's End, Cornwall, United Kingdom (50.11667°N, -5.75°W) by GS U-315 . She was consequently declared a total loss and sold for scrap in December 1945.
 * GS U-1106 : World War II: The Type VIIC/41 submarine was depth charged and sunk in the Atlantic Ocean north east of the Faroe Islands (61.76667°N, -2.26667°W) by a Consolidated B-24 Liberator aircraft of 224 Squadron, Royal Air Force with the loss of all 46 crew.
 * GS U-1169 : World War II: The Type VIIC/41 submarine was depth charged and sunk in the English Channel south of Lizard Point, Cornwall, United Kingdom by HMS Duckworth (K351) with the loss of all 49 crew.
 * GERMAN PATROL BOAT V-5532 : World War II: The patrol boat was damaged with gunfire by HNOMS MTB 716 and HNOMS MTB 717 (both ) in Stokksundet, Norway, and beached. The ship was then destroyed by fire. Of the 17 man crew, eight were killed and nine wounded.

30 March

 * GERMAN ESCORT SHIP F6 : World War II: The escort ship was bombed and sunk by Consolidated B-24 Liberator bombers at Wilhelmshaven, Germany.
 * SS Gudrid (🇳🇴 Norway): World War II: The cargo ship was bombed and sunk at Menstad, Telemark by de Havilland Mosquito aircraft of 143, 235, 248 and 333 Squadrons, Royal Air Force. Raised post-war, repaired and returned to service in 1948.
 * SS Jersbek (1938) (🇩🇪 Germany): World War II: The cargo ship struck a mine and sank off Pillau, East Prussia.
 * GERMAN MINESWEEPER M-329 : The minesweeper was bombed and sunk by aircraft at Wilhelmshaven, Germany.
 * SS Scharnhörn (🇩🇪 Germany): World War II: The cargo ship was bombed and sunk at Menstad by de Havilland Mosquito aircraft of 143, 235, 248 and 333 Squadrons, RAF.
 * SS Stella (1895) (🇩🇪 Germany): World War II: The cargo ship was bombed and sunk by aircraft at Bremen, Germany.
 * SS Svanefjell (🇳🇴 Norway): World War II: The cargo ship was bombed and sunk at Menstad by de Havilland Mosquito aircraft of 143, 235, 248 and 333 Squadrons, RAF. Raised post-war, repaired and returned to service.
 * SS Torafire (🇳🇴 Norway): World War II: The cargo ship was bombed and sunk at Menstad by de Havilland Mosquito aircraft of 143, 235, 248 and 333 Squadrons, RAF. Raised in August 1945, repaired and returned to service in February 1948.
 * GS U-96 (1940) : World War II: The Type VIIC submarine was bombed and sunk at Wilhelmshaven, Lower Saxony by United States Army Air Forces aircraft.
 * GS U-348 : World War II: The Type VIIC submarine was bombed and sunk at Hamburg (53.55°N, 9.95°W) by United States Army Air Forces aircraft with the loss of two crew.
 * GS U-350 : World War II: The Type VIIC submarine was bombed and sunk at Finkenwerder, Hamburg (53.55°N, 9.95°W) by United States Army Air Forces aircraft.
 * GS U-429 : World War II: The Type VIIC submarine was bombed and sunk at Wilhelmshaven, Lower Saxony (53.51667°N, 8.16667°W) by United States Army Air Forces aircraft.
 * GS U-430 : World War II: The Type VIIC submarine was bombed and sunk at Bremen (53.13333°N, 8.76667°W) by United States Army Air Forces aircraft.
 * GS U-870 : World War II: The Type IXC/40 submarine was bombed and sunk at Bremen by United States Army Air Forces aircraft.
 * GS U-965 : World War II: The Type VIIC submarine was depth charged and sunk in the Atlantic Ocean north of Scotland (58.31667°N, -5.51667°W) by HMS Conn (K509) and HMS Rupert (K561) (both ).
 * GS U-1167 : World War II: The Type VIIC/41 submarine was bombed and sunk at Hamburg in a British air raid with the loss of one crew member.
 * GS U-2340 : World War II: The Type XXIII submarine was bombed and sunk at Hamburg in a British air raid. The wreck was scrapped post-war.

31 March

 * JAPANESE SUBMARINE I-8 : World War II: The Type J3 submarine was depth charged, shelled and sunk in the Pacific Ocean off Okinawa by USS Morrison (DD-560) and USS Stockton (DD-646) (both ) with the loss of 99 of her 100 crew. The survivor was rescued by USS Morrison.
 * SS John C. Fremont (🇺🇸 United States): World War II: The Liberty ship was damaged by a mine in Subic Bay, Philippines and was declared a constructive total loss.

Unknown date

 * GS U-296 : World War II: The Type VIIC submarine was lost on or about 12 March on patrol in the Atlantic Ocean (approximately 55.5°N, -7°W) possibly due to striking a mine. All 42 crew killed.
 * GS U-758 : World War II: The Type VIIC submarine was severely damaged in a British air raid on Kiel, Schleswig-Holstein. She was struck from the navy list on 16 March. Scrapped in 1946.