Italian Submarine Actions
This information was originally generated by the U.S.M.M. (Historical Bureau of the Italian Navy) and later updated over the years by various authors based on new finding.
| Date | Time | Boat | Captain | Area | Coordinates | Convoy | Weapon | Result | Ship | Type | Tonns | Flag |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 6/12/1940 | 21.57 | Naiade | T.V. Luigi Baroni | Mediterranean | Torpedo | Sank | Orkanger | Motor Tanker | 8029 | Norwey | ||
| 6/12/1940 | 00.59 | Bagnolini | C.C. Franco Tosoni Pittoni | Mediterranean | 34°03’N-24°05’E | Torpedo | Sank | HMS Calypso | Light Cruiser | 4180 | Great Britain | |
| 6/13/1940 | Dandolo | C.C. Riccardo Boris | Mediterranean | Torpedo | Failed | Jeanne de Vienne | Light Cruiser | France | ||||
| 6/16/1940 | 06:10 | Durbo | C.C. Armando Acanfora | Mediterranean | 34°06’N-11°33’E | Torpedo | Failed | ? | Corvette or Destroyer | France | ||
| 6/17/1940 | 15:00 | Galilei | C.C. Corrado Nardi | Indian Ocean | 12°35’N-45°03’E | Torpedo | Sank | Jarnes Stove | Motor Tanker | 8215 | Great Britain | |
| 6/22/1940 | 01.35 | Capponi | C.C. Romeo Romei | Mediterranean | 36°59’N-11°12’E | Torpedo | Sank | Elgo | Steam Freighter | 1888 | Sweden | |
| 6/23/1940 | 06:00 | Torricelli | C.C. Salvatore Pelosi | Indian Ocean | 13°N-43°E | Artillery | Damaged | H.M.S. Shoreham | Gunboat | 1105 | Great Britain | |
| 6/23/1940 | 05.35 | Torricelli | C.C. Salvatore Pelosi | Indian Ocean | 13°N-43°E | Artillery | Failed | H.M.S. Karthoum | Destroyer | 1690 | Great Britain | |
| 7/2/1940 | 23.30 | Marconi | C.C. Giulio Chialamberto | Mediterranean | Gibraltar | Torpedo | Failed | HMS Vortigen | Destroyer | Great Britain | ||
| 7/7/1940 | 23.41 | Beilul | C.C. Paolo Vigliasindi | Mediterranean | 32°40’N-28°10’E | Torpedo | Failed | HMS Hasty | Destroyer | Great Britain | ||
| 1/9/1941 | 00.17 | Beilul | C.C. Paolo Vigliasindi | Mediterranean | 35°25′ N-26°28′ E | Torpedo | Failed | Vasilef Georgios | Destroyer | 1371 | Greece | |
| 6/3/1942 | Beilul | T.V. Francesco Pedrotti | Mediterranean | Torpedo | Failed | Escort Units | Unknown | |||||
| 6/12/1943 | 21.55 | Beilul | T.V. Pasquale Beltrame | Mediterranean | Capo Passero | Torpedo | Failed | Escort Units | Unknown | |||
| 7/10/1940 | 19.30 | Scirè | T.V. Adriano Pini | Mediterranean | Island of Asinara | Torpedo | Sank | Cheik | Steam Freighter | 1058 | France | |
| 7/11/1940 | 03:00 | Marconi | C.C. Giulio Chialamberto | Mediterranean | 36°20’N-03°46’E | Torpedo | Sank | HMS Escort | Destroyer | 1375 | Great Britain | |
| 7/11/1940 | 23:00 | Tarantini | C.C. Alfredo Iaschi | Mediterranean | Haifa | Torpedo | Sank | Beme | Tanker | 3039 | Panama | |
| 8/1/1940 | – | Mameli | C.C. Nicola Maiorana | Mediterranean | 34°00’N-26°00’E | Artillery | Sank | Roula | Steam Freighter | 1044 | Greece | |
| 8/13/1940 | 05.50 | Malaspina | C.F. Mario Leoni | Atlantic Ocean | 37°44’N-22°56’W | OB.193d | Torpedo | Sank | British Fame | Motor Tanker | 8406 | Great Britain |
| 8/15/1940 | – | Delfino | T.V. Giuseppe Aicardi | Mediterranean | Tinos | Torpedo | Sank | Helli | Light Cruiser | 2116 | Greece | |
| 8/20/1940 | 14:00 | Barbarigo | C.C. Giulio Ghiglieri | Atlantic Ocean | 31°15’N-13°02’W | Artillery | Damaged | Aguila | Steam Freighter | 3255 | Great Britain | |
| 8/21/1940 | 20.30 | Dandolo | C.C. Riccardo Boris | Atlantic Ocean | 38°57’N-13°50’W | Torpedo | Damaged | Hermes | Motor Tanker | 3768 | Netherland | |
| 8/26/1940 | 18:00 | Dandolo | C.C. Riccardo Boris | Atlantic Ocean | 37°14’N-21°52’W | Torpedo | Sank | Ilvington Court | Steam Freighter | 5187 | Great Britain | |
| 9/7/1940 | 15:00 | Guglielmotti | C.C. Carlo Tucci | Indian Ocean | 15°50’N-41°50’E | Torpedo | Sank | Atlas | Motor Freighter | 4008 | Greece | |
| 9/9/1940 | 10.40 | Faa di Bruno | C.C. Aldo Enrici | Atlantic Ocean | Artillery | Damaged | Auris | Motor Tanker | 8030 | Great Britain | ||
| 9/14/1940 | 08.30 | Emo | C.C. Carlo Liannazza | Atlantic Ocean | 42°27’N-21°50’W | SLS.46d | Torpedo and Artillery | Sank | Saint Agnes | Steam Freighter | 5199 | Great Britain |
| 9/18/1940 | – | Bagnolini | C.C. Franco Tosoni Pittoni | Atlantic Ocean | 41°20’N-09°16’W | Torpedo | Sank | Cabo Tortosa | Steam Freighter | 3302 | Spain | |
| 9/19/1940 | 20.34 | Serpente | C.C. Antonio Dotta | Mediterranean | Santa Maria di Leuca | Torpedo | Failed | Colonna | Submarine | 880 | Italy | |
| 9/19/1940 | 03.15 | Marconi | C.C. Giulio Chialamberto | Atlantic Ocean | 43°30’N-08°50’W | Torpedo | Sank | Alm. Jose de Carranza | Steam Trawler | 330 | Spain | |
| 10/1/1940 | 16.15 | Baracca | C.C. Enrico Bertarelli | Atlantic Ocean | 40’N-16°55’W | Artillery | Sank | Aghios Nicolaos | Steam Freighter | 3687 | Greece | |
| 10/5/1940 | 04.13 | Nani | C.C. Gioacchino Polizzi | Atlantic Ocean | Torpedo | Sank | Kingston Sapphire | Gunboat | 356 | Great Britain | ||
| 10/6/1940 | – | Tricheco | C.C. Alberto Avogadro di Cerrione | Mediterranean | 35°30’N-27°18’E | Torpedo | Sank | Gemma | Submarine | 695 | Italy | |
| 10/12/1940 | 12.52 | Tazzoli | C.C. Vittore Raccanelli | Atlantic Ocean | 35°34’N-10°35’W | Torpedo and Artillery | Sank | Orao | Steam Freighter | 5135 | Yugoslavia | |
| 10/15/1940 | 23.15 | Cappellini | C.C. Salvatore Todaro | Atlantic Ocean | 32’N-31°20’W | OB.223d | Artillery | Sank | Kabalo | Steam Freighter | 5186 | Belgium |
| 10/15/1940 | 01.40 | Toti | C.C. Bandino Bandini | Mediterranean | 36°16’N-17°37’E | Torpedo and Artillery | Sank | HMS Triad | Submarine | 1090 | Great Britain | |
| 10/27/1940 | – | Nani | C.C. Gioacchino Polizzi | Atlantic Ocean | 37°N-24°W | Artillery | Sank | Meggie | Steam Freighter | 1583 | Sweden | |
| 11/9/1940 | 21.05 | Marconi | C.C. Giulio Chialamberto | Atlantic Ocean | 55°41’N-18°24’W | HX.84 | Torpedo | Sank | Vingaland | Motor Freighter | 2734 | Sweden |
| 11/10/1940 | 0.09 | Capponi | C.C. Romeo Romei | Mediterranean | Malta | Torpedo | Failed | Ramillies | Battleship | Great Britain | ||
| 11/18/1940 | 17.40 | Baracca | C.C. Enrico Bertarelli | Atlantic Ocean | 53°N-17°W | SLS.53d | Torpedo | Sank | Lilian Moller | Steam Freighter | 4866 | Great Britain |
| 11/26/1940 | 22.26 | Tembien | T.V. Guido Gozzi | Mediterranean | 36°00’N-14°47’E | Torpedo | Failed | York | Heavy Cruiser | Great Britain | ||
| 11/26/1940 | 22.33 | Tembien | T.V. Guido Gozzi | Mediterranean | 36°00’N-13°47’E | Torpedo | Failed | Glocester | Light Cruiser | Great Britain | ||
| 11/28/1940 | 03.05 | Dessiè | T.V. Adriano Pini | Mediterranean | 36°30’N-12°59’E | Torpedo | Failed | Glasgow | Light Cruiser | Great Britain | ||
| 11/29/1940 | 23.20 | Delfino | C.C. Alberto Avogadro di Cerrione | Mediterranean | Kalojieri | Torpedo | Failed | Spetsai | Destroyer | Greece | ||
| 12/1/1940 | 04.49 | Argo | T.V. Alberto Crepas | Atlantic Ocean | 54°04-16°55’W | Torpedo | Damaged | Sanguenay | Destroyer | 1337 | Great Britain | |
| 12/5/1940 | 03.39 | Argo | T.V. Alberto Crepas | Atlantic Ocean | 54°14’N-18°8’W | OB.252s | Torpedo | Sank | Silverpine | Motor Freighter | 5066 | Great Britain |
| 12/18/1940 | 05.15 | Veniero | C.C. Manlio Petroni | Atlantic Ocean | 54°24’N-19°04’W | SC.15d | Torpedo | Sank | Anastassia | Steam Freighter | 2889 | Greece |
| 12/19/1940 | 17.50 | Bagnolini | C.C. Franco Tosoni Pittoni | Atlantic Ocean | 54°10’N-15°50’W | SC.15 d | Torpedo | Sank | Amicus | Steam Freighter | 3660 | Great Britain |
| 12/20/1940 | 01.02 | Serpente | C.C. Antonio Dotta | Mediterranean | 35°30’N-16°20’E | Torpedo | Failed | H.M.S. Hyperion | Destroyer | Great Britain | ||
| 12/20/1940 | 10:00 | Calvi | C.C. Giuseppe Caridi | Atlantic Ocean | 54°30’N-18°30’W | OB.260d | Torpedo | Sank | Carlton | Steam Freighter | 5162 | Great Britain |
| 12/21/1940 | 22.09 | Mocenigo | C.C. Alberto Agostini | Atlantic Ocean | 41°N-17°W | OG.47 | Torpedo | Sank | Mangen | Steam Freighter | 1253 | Sweden |
| 12/27/1940 | 14.45 | Tazzoli | C.C. Vittore Raccanelli | Atlantic Ocean | 59°16’N-20°27’W | Torpedo | Sank | Ardanbahn | Steam Freighter | 4980 | Great Britain | |
| 1/1/1941 | 20:00 | Bagnolini | C.C. Franco Tosoni Pittoni | Atlantic Ocean | 54°10’N-13°55’W | Torpedo | Failed | Northen pride | Gunboat | Great Britain | ||
| 1/5/1941 | 10:00 | Cappellini | C.C. Salvatore Todaro | Atlantic Ocean | 18°05’N-21°10’W | OB.262d | Torpedo and Artillery | Sank | Shakespeare | Steam Freighter | 5029 | Great Britain |
| 1/10/1941 | 22.22 | Settimo | C.C. Mario Spano | Mediterranean | 35°22’N-16°15’E | Torpedo | Failed | Southampton | Light Cruiser | Great Britain | ||
| 1/14/1941 | 08.30 | Cappellini | C.C. Salvatore Todaro | Atlantic Ocean | 8°55’N-15°03’W | Torpedo and Artillery | Sank | Eumaeus | Steam Freighter | 7472 | Great Britain | |
| 1/15/1941 | 21.20 | Torelli | C.F. Primo Longobardo | Atlantic Ocean | 52°45’N-23°59’W | Torpedo | Sank | Brask | Steam Freighter | 4079 | Norwey | |
| 1/15/1941 | 21.48 | Torelli | C.F. Primo Longobardo | Atlantic Ocean | 52°33’N-24°13’W | Torpedo | Sank | Nemea | Steam Freighter | 5101 | Greece | |
| 1/16/1941 | 10:00 | Torelli | C.F. Primo Longobardo | Atlantic Ocean | 53°N-24°W | Torpedo and Artillery | Sank | Nicolaos Filinis | Steam Freighter | 3111 | Greece | |
| 1/20/1941 | 12.20 | Marcello | C.C. Carlo Alberto Teppati | Atlantic Ocean | 50°N-19°W | Artillery | Sank | Portugal | Steam Freighter | 1550 | Belgium | |
| 1/28/1941 | 21:00 | Torelli | C.F. Primo Longobardo | Atlantic Ocean | 54°54’N-19’W | HX.102s | Torpedo | Sank | Urla | Steam Freighter | 5198 | Great Britain |
| 1/31/1941 | 19.18 | Dandolo | C.C. Riccardo Boris | Atlantic Ocean | 56’N-15°42’W | Torpedo | Sank | Pizarro | Steam Freighter | 1367 | Great Britain | |
| 2/14/1941 | 01.45 | Bianchi | C.C. Adalberto Giovannini | Atlantic Ocean | 54°N-21°W | SC.21 | Torpedo | Sank | Belcrest | Steam Freighter | 4517 | Great Britain |
| 2/23/1941 | – | Bianchi | C.C. Adalberto Giovannini | Atlantic Ocean | Torpedo | Sank | Manistree | Steam Freighter | 5360 | Great Britain | ||
| 2/24/1941 | 03.45 | Bianchi | C.C. Adalberto Giovannini | Atlantic Ocean | 58°25’N-20°23’W | OB.228 | Torpedo | Sank | Huntington | Steam Freighter | 10946 | Great Britain |
| 2/27/1941 | 01.45 | Bianchi | C.C. Adalberto Giovannini | Atlantic Ocean | Torpedo | Failed | Empire Ability | Steam Freighter | Great Britain | |||
| 2/27/1941 | 04.47 | Bianchi | C.C. Adalberto Giovannini | Atlantic Ocean | 51°52’N-19°55’W | OB.290 | Torpedo | Sank | Baltistan | Steam Freighter | 6803 | Great Britain |
| 3/14/1941 | 13.07 | Emo | C.C. Giuseppe Roselli Lorenzini | Atlantic Ocean | 58°52’N-21°13’W | SC24 s | Torpedo | Sank | Westein Chief | Steam Freighter | 5759 | Great Britain |
| 3/24/1941 | 16.09 | Veniero | C.C. Manlio Petroni | Atlantic Ocean | 49°00’N-22°55’W | OG.56 d | Torpedo and Artillery | Sank | Agnete Maersk | Steam Freighter | 2104 | Great Britain |
| 3/29/1941 | 20:27 | Dagabur | T.V. Domenico Romano | Mediterranean | 33°47′ N-25°24′ E | Torpedo | Damaged (?) | H.M.S. Bonaventure | Light Cruiser | 5440 | Great Britain | |
| 3/31/1941 | 02.44 | Ambra | T.V. Mario Arillo | Mediterranean | 33°20’N-26°35’E | Torpedo | Failed | H.M.S. Stuart | Destroyer | Great Britain | ||
| 3/31/1941 | 02.44 | Ambra | T.V. Mario Arillo | Mediterranean | 33°20’N-26°35’E | Torpedo | Sank | H.M.S. Bonaventure | Light Cruiser | 5440 | Great Britain | |
| 4/15/1941 | 21.31 | Tazzoli | C.C. Carlo Fecia di Cossato | Atlantic Ocean | 37°09’N-18°42’W | Torpedo and Artillery | Sank | Aurillac | Steam Freighter | 4733 | Great Britain | |
| 5/7/1941 | 09:00 | Tazzoli | C.C. Carlo Fecia di Cossato | Atlantic Ocean | 10°N-20°’W | Torpedo | Sank | Fernlane | Motor Freighter | 4310 | Norwey | |
| 5/9/1941 | 20.16 | Tazzoli | C.C. Carlo Fecia di Cossato | Atlantic Ocean | 2°59’N-20°26’W | Torpedo | Sank | Alfred Olsen | Motor Tanker | 8817 | Norwey | |
| 5/20/1941 | 00.13 | Otaria | C.C. Giuseppe Vocaturo | Atlantic Ocean | 51°45’N-20°45’W | SL.73 | Torpedo | Sank | Starcross | Steam Freighter | 4662 | Great Britain |
| 6/1/1941 | 14.52 | Marconi | T.V. Mario Paolo Pollina | Atlantic Ocean | 36°N-11°’W | Torpedo | Sank | Exportador | Steam Trawler | 318 | Portugal | |
| 6/6/1941 | 2.15 | Veniero | C.C. Manlio Petroni | Atlantic Ocean | OG.64 | Torpedo | Failed | Ariosto | Steam Freighter | 2176 | Great Britain | |
| 6/6/1941 | 4.25 | Marconi | T.V. Mario Paolo Pollina | Atlantic Ocean | 35°30’N-11°30’W | OG.63 | Torpedo | Sank | Baron Lovat | Steam Freighter | 3395 | Great Britain |
| 6/6/1941 | 4.27 | Marconi | T.V. Mario Paolo Pollina | Atlantic Ocean | 35°36’N-11°12’W | OG.63 | Torpedo | Sank | Taberg | Steam Freighter | 1392 | Sweden |
| 6/13/1941 | 04.50 | Brin | C.C. Luigi Longanesi-Cattani | Atlantic Ocean | 38°53’N-23°11’W | SL.75 | Torpedo | Sank | Eirini Kyriakides | Steam Freighter | 3781 | Greece |
| 6/13/1941 | 04.50 | Brin | C.C. Luigi Longanesi-Cattani | Atlantic Ocean | 38°53’N-23°11’W | SL.75 | Torpedo | Sank | Djurdjura | Steam Freighter | 3460 | France |
| 6/20/1941 | 21.33 | Ondina | T.V. Corrado Dal Pozzo | Mediterranean | 36°08’N-34°44’E | Torpedo | Sank | Refah | Steam Freighter | 3805 | Turky | |
| 6/28/1941 | 12.54 | Da Vinci | C.C. Ferdinando Calda | Atlantic Ocean | 34°27’N-11°57’W | Torpedo | Sank | Auris | Motor Tanker | 8030 | Great Britain | |
| 7/3/1941 | 20.05 | Malachite | T.V. Enzo Zanni | Mediterranean | 32°25’N-34°54’E | Torpedo | Failed | H.M.S. Phoebe | Light Cruiser | Great Britain | ||
| 7/14/1941 | 16.07 | Morosini | C.C. Athos Fraternale | Atlantic Ocean | 36°18’N-21°11’W | OG.67 d | Torpedo | Sank | Rupert de Larrinaga | Steam Freighter | 5358 | Great Britain |
| 7/14/1941 | 22.15 | Malaspina | T.V. Giuliano Prini | Atlantic Ocean | 36°N-21°’W | OG.67 d | Torpedo | Sank | Nikoklis | Steam Freighter | 3575 | Greece |
| 7/15/1941 | 03.44 | Morosini | C.C. Athos Fraternale | Atlantic Ocean | 36°N-21°’W | Torpedo | Sank | Lady Somers | Steam Freighter | 8194 | Great Britain | |
| 7/15/1941 | 16.45 | Malaspina | T.V. Giuliano Prini | Atlantic Ocean | 30°44’N-17°33’W | Torpedo | Sank | Guelma | Steam Freighter | 4402 | Great Britain | |
| 7/16/1941 | 01.07 | Nereide | T.V. Augusto Migliorini | Mediterranean | 37°25’N-25°52’E | Torpedo and Artillery | Failed | Triton | Submarine | Greece | ||
| 7/21/1941 | 21.34 | Torelli | C.C. Antonio De Giacomo | Atlantic Ocean | 34°34’N-13°14’W | Torpedo | Sank | Ida Knudsen | Motor Tanker | 8913 | Norwey | |
| 7/25/1941 | 00.34 | Barbarigo | C.C. Francesco Murzi | Atlantic Ocean | 32°48’N-26°12’W | Torpedo | Sank | Macon | Steam Freighter | 5135 | Great Britain | |
| 7/26/1941 | 22.39 | Barbarigo | C.C. Francesco Murzi | Atlantic Ocean | 33°23’N-22°18’W | Torpedo | Sank | Horn Shell | Motor Tanker | 8272 | Great Britain | |
| 8/12/1941 | 21.10 | Tazzoli | C.C. Carlo Fecia di Cossato | Atlantic Ocean | 4’N-9’W | Torpedo | Failed | Sangara | Steam Freighter | 5449 | Great Britain | |
| 8/14/1941 | 12.01 | Marconi | T.V. Mario Paolo Pollina | Atlantic Ocean | 41’N-17°41’W | HG.70 s | Torpedo and Artillery | Damaged | Sud | Steam Freighter | 2689 | Yugoslavia |
| 8/19/1941 | 22.59 | Tazzoli | C.C. Carlo Fecia di Cossato | Atlantic Ocean | 5°30’N-12°50’W | Torpedo | Sank | Sildra | Motor Tanker | 7313 | Norwey | |
| 9/10/1941 | 21.29 | Topazio | C.C. Emilio Berengan | Mediterranean | 33°27’N-34°54’E | Torpedo | Sank | Murefte | Steam Freighter | 691 | Great Britain | |
| 9/20/1941 | Scirè | C.C. Junio Valerio Borghese | Mediterranean | Gibraltar | Attack Craft | Sank | Fiona Shell | Steam Freighter | 2444 | Great Britain | ||
| 9/21/1941 | 21.46 | Ascianghi | T.V. Olinto Di Serio | Mediterranean | 33°57’N-35°04’E | Torpedo | Sank | Antar | Steam Freighter | 389 | Poland | |
| 10/25/1941 | 11:35 | Ferraris | T.V. Filippo Flores | Atlantic Ocean | 37°27′ N-14°33′ W | Artillery | Slight damage | H.M.S. Lamerton | Destroyer | 1050 | Great Britain | |
| 11/8/1941 | 07.20 | Dandolo | C.C. Walter Auconi | Mediterranean | Melilla | Torpedo | Sank | Castillo Oropesa | Steam Freighter | 6600 | Spain | |
| 12/14/1941 | 19:55 | Dagabut | C.C. Alberto Torri | Mediterranean | 34°01′ N-26°02′ E | Torpedo | Failed | H.M.S. Talisman | Submarine | 1090 | Great Britain | |
| 1/23/1942 | – | Barbarigo | C.C. Enzo Grossi | Atlantic Ocean | 36°48’N-15°26’W | Torpedo | Sank | Navemar | Steam Freighter | 5473 | Spain | |
| 2/20/1942 | – | Torelli | C.C. Antonio De Giacomo | Atlantic Ocean | 13°24’N-49°36’W | Torpedo | Sank | Scottish Star | Steam Freighter | 7224 | Great Britain | |
| 2/25/1942 | 00.43 | Torelli | C.C. Antonio De Giacomo | Atlantic Ocean | 10°32’N-53°20’W | Torpedo | Sank | Esso Copenhagen | Motor Tanker | 9245 | Panama | |
| 2/25/1942 | – | Da Vinci | C.C. Luigi Longanesi-Cattani | Atlantic Ocean | 16°N-49°W | Torpedo | Sank | Cabedello | Steam Freighter | 3557 | Brazil | |
| 2/28/1942 | 01.30 | Da Vinci | C.C. Luigi Longanesi-Cattani | Atlantic Ocean | 17°N-48°W | Torpedo | Sank | Everasma | Steam Freighter | 3644 | Latvia | |
| 3/6/1942 | 02.35 | Tazzoli | C.C. Carlo Fecia di Cossato | Atlantic Ocean | 29°12’N-64°29’W | Torpedo and Artillery | Sank | Astrea | Steam Freighter | 1406 | Netherland | |
| 3/6/1942 | 3.08 | Finzi | C.C. Ugo Giudice | Atlantic Ocean | 23°35’N-62°39’W | Torpedo | Sank | Melpomene | Motor Tanker | 7011 | Great Britain | |
| 3/7/1942 | 05:00 | Tazzoli | C.C. Carlo Fecia di Cossato | Atlantic Ocean | 31°22’N-68°05’W | Torpedo and Artillery | Sank | Tonsbergfjord | Motor Freighter | 3156 | Norwey | |
| 3/7/1942 | 01.50 | Finzi | C.C. Ugo Giudice | Atlantic Ocean | 20°50’N-62°05’W | Torpedo and Artillery | Sank | Skane | Steam Freighter | 4528 | Sweden | |
| 3/9/1942 | 02:00 | Tazzoli | C.C. Carlo Fecia di Cossato | Atlantic Ocean | 29°13’N-69°35’W | Torpedo and Artillery | Sank | Montevideo | Steam Freighter | 5785 | Uruguay | |
| 3/10/1942 | 01.24 | Finzi | C.C. Ugo Giudice | Atlantic Ocean | 23°10’N-20°28’W | Torpedo | Sank | Charles Racine | Motor Tanker | 9957 | Norwey | |
| 3/11/1942 | 22.50 | Tazzoli | C.C. Carlo Fecia di Cossato | Atlantic Ocean | 24°N-58°W | Torpedo and Artillery | Sank | Cygnet | Steam Freighter | 3628 | Panama | |
| 3/12/1942 | 01.38 | Morosini | C.C. Athos Fraternale | Atlantic Ocean | 22°N-65°W | Torpedo | Sank | Stangarth | Steam Freighter | 5966 | Great Britain | |
| 3/13/1942 | 18.05 | Tazzoli | C.C. Carlo Fecia di Cossato | Atlantic Ocean | 26°33’N-74°43’W | Torpedo and Artillery | Sank | Daytonian | Steam Freighter | 6434 | Great Britain | |
| 3/14/1942 | 20.56 | Mocenigo | C.C. Paolo Monechi | Mediterranean | 36°16’N-05°05’E | Torpedo | Sank | S. te Marcelle | Sailing Vessel | 1518 | France | |
| 3/15/1942 | 21.35 | Tazzoli | C.C. Carlo Fecia di Cossato | Atlantic Ocean | 26°5’N-75°40’W | Torpedo and Artillery | Sank | Athelqueen | Motor Tanker | 8780 | Great Britain | |
| 3/16/1942 | 05.03 | Morosini | C.C. Athos Fraternale | Atlantic Ocean | 19°15’N-60°25’W | Torpedo and Artillery | Sank | Oscilla | Motor Tanker | 6341 | Netherland | |
| 3/23/1942 | 20.38 | Morosini | C.C. Athos Fraternale | Atlantic Ocean | 24°41’N-57°44’W | Torpedo and Artillery | Sank | Peder Bogen | Tanker | 9741 | Great Britain | |
| 3/29/1942 | 07.45 | Calvi | C.C. Emilio Olivieri | Atlantic Ocean | 12’N-43’W | Torpedo | Sank | Tredinnick | Steam Freighter | 4589 | Great Britain | |
| 3/31/1942 | 21.05 | Calvi | C.C. Emilio Olivieri | Atlantic Ocean | 7°10’N-45°20’W | Torpedo and Artillery | Sank | T.C. McCobb | Destroyer | 7452 | United States | |
| 4/6/1942 | 03.17 | Aradam | T.V. Oscar Gran | Mediterranean | 37°47’N-11°05’E | Torpedo | Sank | HMS Havock | Destroyer | 1340 | Great Britain | |
| 4/8/1942 | 23.57 | Calvi | C.C. Emilio Olivieri | Atlantic Ocean | 2°12’N-39°55’W | Torpedo and Artillery | Sank | Eugene Thayer | Destroyer | 7138 | United States | |
| 4/11/1942 | 00.24 | Calvi | C.C. Emilio Olivieri | Atlantic Ocean | 2°30’S-38’W | Torpedo and Artillery | Sank | Balkis | Motor Tanker | 2161 | Norwey | |
| 4/11/1942 | 00.24 | Calvi | C.C. Emilio Olivieri | Atlantic Ocean | 2°32’S-35°3’W | Torpedo and Artillery | Sank | Ben Brush (Caroline Mærsk) | Motor Tanker | 7691 | Panama | |
| 4/28/1942 | 04.10 | Corallo | C.C. Gino Andreani | Mediterranean | 37°01’N-11°09’E | Artillery | Sank | Dar-el-Salam | Sailing Vessel | 138 | Tunisia | |
| 4/28/1942 | 04.10 | Corallo | C.C. Gino Andreani | Mediterranean | 37°01’N-11°09’E | Artillery | Sank | Tunis | Sailing Vessel | 41 | Tunisia | |
| 5/18/1942 | 22.30 | Barbarigo | C.C. Enzo Grossi | Atlantic Ocean | 2°59’N-34°10’W | Torpedo and Artillery | Damaged | Commandante Lyra | Steam Freighter | 5052 | Brazil | |
| 5/19/1942 | 00.31 | Cappellini | T.V. Marco Revedin | Atlantic Ocean | 3°38’N-32°01’W | Torpedo and Artillery | Sank | Tisnaren | Steam Freighter | 5747 | Sweden | |
| 5/23/1942 | 09.38 | Archimede | C.C. Gianfranco Gazzana Priaroggia | Atlantic Ocean | 2°10’S-35°55’W | Torpedo | Failed | U.S.S. Moffett | Destroyer | United States | ||
| 5/28/1942 | 22.20 | Barbarigo | C.C. Enzo Grossi | Atlantic Ocean | 6°22’S-29°44’W | Torpedo and Artillery | Sank | Charlbury | Steam Freighter | 4835 | Great Britain | |
| 5/31/1942 | 02.30 | Cappellini | T.V. Marco Revedin | Atlantic Ocean | 0°45’S-29°50’W | Torpedo | Sank | Dinsdale | Fleet Tanker | 8214 | Great Britain | |
| 6/2/1942 | 22.5 | Da Vinci | C.C. Luigi Longanesi-Cattani | Atlantic Ocean | 7°16’N-13°20’W | Torpedo and Artillery | Sank | Reine Marie Stewart | Sailing Vessel | 1087 | Panama | |
| 6/7/1942 | 23.28 | Da Vinci | C.C. Luigi Longanesi-Cattani | Atlantic Ocean | 4°17’N-13°48’W | Torpedo | Sank | Chile | Motor Freighter | 6956 | Great Britain | |
| 6/7/1942 | 02:00 | Corallo | C.C. Gino Andreani | Mediterranean | 37°24’N-9°10’E | Artillery | Sank | Hady M’Hammed | Sailing Vessel | 26 | Tunisia | |
| 6/10/1942 | 23.33 | Da Vinci | C.C. Luigi Longanesi-Cattani | Atlantic Ocean | 0°08’N-18°52’W | Torpedo and Artillery | Sank | Alioth | Motor Freighter | 5483 | Netherland | |
| 6/13/1942 | :008.30 | Da Vinci | C.C. Luigi Longanesi-Cattani | Atlantic Ocean | 5°30’N-23°30’W | Torpedo and Artillery | Sank | Clan Macquarrie | Steam Freighter | 6471 | Great Britain | |
| 6/15/1942 | 16.30 | Archimede | C.C. Gianfranco Gazzana Priaroggia | Atlantic Ocean | 4°45’N-40°55’W | Torpedo and Artillery | Sank | Cardina | Steam Freighter | 5586 | Panama | |
| 6/15/1942 | CA 3 | T.V. Giovanni Sorrentino | Black Sea | Torpedo | Sank | S 32 | Submarine | 840 | Soviet Unions | |||
| 6/18/1942 | CA 2 | S.T.V. Attilio Russo | Black Sea | Torpedo | Sank | SC-213 | Submarine | 586 | Soviet Unions | |||
| 6/22/1942 | 21.25 | Alagi | T.V. Sergio Puccini | Mediterranean | Cape Bon | Torpedo | Sank | Usodimare | Destroyer | 1943 | Italy | |
| 6/30/1942 | 08.40 | Morosini | T.V. Francesco D’Alessandro | Atlantic Ocean | 25°33’N-57°33’W | Torpedo and Artillery | Sank | Tysa | Motor Freighter | 5327 | Netherland | |
| 7/9/1942 | 05:00 | Perla | T.V. Gioacchino Ventura | Mediterranean | Beirut | Torpedo | Sank | Machester City | Steam Freighter | 0 | Great Britain | |
| 7/12/1942 | 20.04 | Alagi | T.V. Sergio Puccini | Mediterranean | 34°59’N-35°32’E | Torpedo | Sank | Antares | Steam Freighter | 3723 | Turky | |
| 8/1/1942 | 22.59 | Tazzoli | C.C. Carlo Fecia di Cossato | Atlantic Ocean | 11°06’N-59°05’W | Torpedo | Sank | Kastor | Steam Freighter | 5497 | Greece | |
| 8/7/1942 | 10.31 | Tazzoli | C.C. Carlo Fecia di Cossato | Atlantic Ocean | 11°18’N-54°45’W | Torpedo | Sank | Havsten | Motor Tanker | 6161 | Norwey | |
| 8/10/1942 | 07.04 | Giuliani | C.F. Giovanni Bruno | Atlantic Ocean | 9°26’N-38°28’W | Torpedo and Artillery | Sank | Medon | Motor Freighter | 5444 | Great Britain | |
| 8/11/1942 | 04.42 | Uarsciek | T.V. Gaetano Arezzo della Targia | Mediterranean | 37°52’N-01°48’E | WS21S | Torpedo | Failed | Furious | Aircraft Carrier | 19826 | Great Britain |
| 8/12/1942 | 16.33 | Emo | T.V. Giuseppe Franco | Mediterranean | 37°52’N-9°21’E | WS21S | Torpedo | Failed | H.M.S. Tartar | Destroyer | Great Britain | |
| 8/12/1942 | 23.48 | Bronzo | T.V. Cesare Buldrini | Mediterranean | 37°34’N-10°34’E | WS21S | Torpedo | Sank | Empire Hope | Steam Freighter | 12688 | Great Britain |
| 8/12/1942 | 19.55 | Axum | C.C. Renato Ferrini | Mediterranean | 37°26’N-10°22’E | WS21S | Torpedo | Sank | HMS Cairo | Light Cruiser | 4200 | Great Britain |
| 8/12/1942 | 19.55 | Axum | C.C. Renato Ferrini | Mediterranean | 37°26’N-10°22’E | WS21S | Torpedo | Damaged | HMS Nigeria | Light Cruiser | 8670 | Great Britain |
| 8/12/1942 | 19.55 | Axum | C.C. Renato Ferrini | Mediterranean | 37°26’N-10°22’E | WS21S | Torpedo | Damaged | Ohio | Tanker | 9625 | United States |
| 8/12/1942 | 19.38 | Dessiè | T.V. Renato Scandola | Mediterranean | 37°38’N-10°25’E | WS21S | Torpedo | Sank | Deucalion | Motor Freighter | 7516 | Great Britain |
| 8/13/1942 | 20.30 | Giuliani | C.F. Giovanni Bruno | Atlantic Ocean | 9°21’N-34°35’W | Torpedo and Artillery | Sank | California | Steam Freighter | 5441 | United States | |
| 8/13/1942 | 21.05 | Alagi | T.V. Sergio Puccini | Mediterranean | 37°28’N-10°38’E | WS21.S | Torpedo | Sank | Clan Ferguson | Steam Freighter | 7347 | Great Britain |
| 8/14/1942 | 04.51 | Granito | T.V. Leo Sposito | Mediterranean | 37°15’N-9°40’E | WS21.S | Torpedo | Failed | H.N.S. Ashanti | Destroyer | Great Britain | |
| 8/14/1942 | 19.30 | Giuliani | C.F. Giovanni Bruno | Atlantic Ocean | 10°49’N-33°35’W | Torpedo | Sank | SyIvia de Larrinaga | Steam Freighter | 5218 | Great Britain | |
| 10/6/1942 | 02.20 | Barbarigo | C.C. Enzo Grossi | Atlantic Ocean | Torpedo | Failed | Petunia | Corvette | Great Britain | |||
| 10/9/1942 | 07.05 | Archimede | C.C. Guido Saccardo | Atlantic Ocean | 4°29’N-20°52’W | Torpedo | Sank | Oronsay | Steam Freighter | 20043 | Great Britain | |
| 10/10/1942 | 00.14 | Archimede | C.C. Guido Saccardo | Atlantic Ocean | 58°18’N-27°55’W | Torpedo | Damaged | Nea Hellas | Steam Freighter | 16991 | Greece | |
| 11/2/1942 | 07.13 | Da Vinci | C.C. Gianfranco Gazzana Priaroggia | Atlantic Ocean | 0°30’S-30°45’W | Torpedo and Artillery | Sank | Empire Zeal | Steam Freighter | 7009 | Great Britain | |
| 11/3/1942 | 17.03 | Cagni | C.C. Carlo Liannazza | Atlantic Ocean | 2°30’N-19°00’W | Torpedo | Sank | Dagomba | Motor Freighter | 3845 | Great Britain | |
| 11/4/1942 | 22.08 | Da Vinci | C.C. Gianfranco Gazzana Priaroggia | Atlantic Ocean | 2°00’S-30°30’W | Torpedo and Artillery | Sank | Andreas | Steam Freighter | 6566 | Greece | |
| 11/10/1942 | 00.12 | Da Vinci | C.C. Gianfranco Gazzana Priaroggia | Atlantic Ocean | 5°40’S-32°41’W | Torpedo and Artillery | Sank | Marcus Whitman | Steam Freighter | 7176 | United States | |
| 11/11/1942 | 06.11 | Da Vinci | C.C. Gianfranco Gazzana Priaroggia | Atlantic Ocean | 3°51’S-29°22’W | Torpedo and Artillery | Sank | Veerhaven | Steam Freighter | 5291 | Netherland | |
| 11/12/1942 | 06.01 | Argo | T.V. Pasquale Gigli | Mediterranean | 36°42’N-5°10’E | Torpedo | Sank | Tynwald | Armed Merchant Cruiser | 2376 | Great Britain | |
| 11/12/1942 | 06.01 | Argo | T.V. Pasquale Gigli | Mediterranean | 36°42’N-5°10’E | Torpedo | Sank | Awatea | Steam Freighter | 13482 | Great Britain | |
| 11/15/1942 | 03.42 | Ascianghi | C.C. Rino Erier | Mediterranean | 36°45’N-5°11’E | Torch | Torpedo | Sank | HMS Algerine | Minesweeper | 850 | Great Britain |
| 11/29/1942 | 20:00 | Cagni | C.C. Carlo Liannazza | Indian Ocean | 34°53’S-17°54’E | Torpedo | Sank | Argo | Steam Freighter | 1995 | Greece | |
| 12/12/1942 | 00.50 | Tazzoli | C.C. Carlo Fecia di Cossato | Atlantic Ocean | 5°56’N-39°50’W | Torpedo and Artillery | Sank | Empire Hawk | Steam Freighter | 5032 | Great Britain | |
| 12/12/1942 | 18.25 | Tazzoli | C.C. Carlo Fecia di Cossato | Atlantic Ocean | 7°25’N-39°19’W | Torpedo | Sank | Ombilin | Steam Freighter | 5658 | Netherland | |
| 12/12/1942 | Ambra | T.V. Mario Arillo | Mediterranean | Agerie’S | Artillery | Sank | Berto | Steam Freighter | 1493 | Norwey | ||
| 12/21/1942 | 19.59 | Tazzoli | C.C. Carlo Fecia di Cossato | Atlantic Ocean | 0°49’S-41°34’W | Torpedo and Artillery | Sank | Oueen City | Steam Freighter | 4814 | Great Britain | |
| 12/25/1942 | 10:00 | Tazzoli | C.C. Carlo Fecia di Cossato | Atlantic Ocean | 2°02’S-35°17’W | Torpedo | Sank | Dona Aurora | Motor Freighter | 5011 | United States | |
| 1/30/1943 | 00.17 | Platino | T.V. Vittorio Patrelli Campagnano | Mediterranean | 36°56’N-5°40’E | Torpedo | Sank | Samphire | Corvette | 925 | Great Britain | |
| 2/5/1943 | – | Avorio | T.V. Leone Fiorentini | Mediterranean | Philippiville | Torpedo | Failed | Uknown | Uknown | Unknown | ||
| 2/7/1943 | 23.27 | Acciaio | T.V. Ottorino Beltrami | Mediterranean | 37°22’N-6°14’E | Torpedo | Sank | Tervani | Tanker | 409 | Great Britain | |
| 2/24/1943 | 12.24 | Barbarigo | C.C. Roberto Rigoli | Atlantic Ocean | 4°46’S-31°55’W | Torpedo | Sank | Monte Igueldo | Steam Freighter | 3453 | Spain | |
| 3/2/1943 | 23.01 | Barbarigo | C.C. Roberto Rigoli | Atlantic Ocean | 17°10’S-35°58’W | Torpedo and Artillery | Sank | Alfonso Penna | Steam Freighter | 3540 | Brazil | |
| 3/3/1943 | 23.13 | Barbarigo | C.C. Roberto Rigoli | Atlantic Ocean | 16°44’S-36°33’W | Torpedo | Sank | Stag Hound | Motor Freighter | 8591 | United States | |
| 3/14/1943 | 01.10 | Da Vinci | C.C. Gianfranco Gazzana Priaroggia | Atlantic Ocean | 1°13’S-9°57’W | Torpedo | Sank | Empress of Canada | Steam Freighter | 21517 | Great Britain | |
| 3/19/1943 | – | Da Vinci | C.C. Gianfranco Gazzana Priaroggia | Atlantic Ocean | 10°10’S-1°00’E | Torpedo | Sank | Lulworth Hill | Steam Freighter | 7628 | Great Britain | |
| 3/28/1943 | 22.02 | Finzi | T.V. Mario Rossetto | Atlantic Ocean | 2°00’N-15°30’W | Torpedo | Sank | Granicos | Steam Freighter | 3689 | Greece | |
| 3/30/1943 | 00.48 | Finzi | T.V. Mario Rossetto | Atlantic Ocean | 4°16’N-17°44’W | Torpedo | Sank | Celtic Star | Steam Freighter | 5575 | Great Britain | |
| 4/17/1943 | Da Vinci | C.C. Gianfranco Gazzana Priaroggia | Indian Ocean | 31°30’S-33°30’E | Torpedo | Sank | Sembilan | Steam Freighter | 6566 | Netherland | ||
| 4/18/1943 | Da Vinci | C.C. Gianfranco Gazzana Priaroggia | Indian Ocean | 30°59’S-33°00’E | Torpedo and Artillery | Sank | Manaar | Steam Freighter | 8007 | Great Britain | ||
| 4/21/1943 | Da Vinci | C.C. Gianfranco Gazzana Priaroggia | Indian Ocean | 32°03’S-34°03’E | Torpedo and Artillery | Sank | Doryssa | Motor Tanker | 8078 | Great Britain | ||
| 4/21/1943 | Da Vinci | C.C. Gianfranco Gazzana Priaroggia | Indian Ocean | 32°10’S-34°50’E | Torpedo and Artillery | Sank | John Drayton | Steam Freighter | 7177 | United States | ||
| 7/14/1943 | 22.30 | Nichelio | C.C. Claudio Celli | Mediterranean | Messina | Artillery | Sank | MGB 641 | Motor Torpedo Boat | 90 | Great Britain | |
| 7/25/1943 | – | Cagni | C.C. Giuseppe Roselli Lorenzini | Atlantic Ocean | 6°52’N-20°45’W | Torpedo | Damaged | HMS Asturias | Armed Merchant Cruiser | 22048 | Great Britain | |
| 8/26/1943 | CA 4 | S.T.V. Armando Sibille | Black Sea | Torpedo | Sank | SC-207 | Submarine | 586 | Soviet Unions | |||
| 12/11/1941 | 02:40 | Caracciolo | T.V. Alfredo Musotto | Mediterranean | 32°09’N-25°19’E | Torpedo | Failed | Darien | Steam Freighter | 459 | Great Britain | |
| 12/11/1941 | 02:40 | Caracciolo | T.V. Alfredo Musotto | Mediterranean | 32°09’N-25°19’E | Torpedo | Failed | H.M.S. Farndale | Destroyer | 1050 | Great Britain | |
| 10/2/1942 | 19:15 | Sciesa | Mediterranean | Torpedo | Failed | Unknown | Unknown | |||||
| 7/4/1942 | 2:10 | Asteria | T.V. Pasquale Beltrame | Mediterranean | 33°48’N, 34°56’E | Torpedo | Failed | HMSAS Protea (?) | Armed Whaler | 955 | South Africa | |
| 11/13/1942 | 01:00 | Asteria | T.V. Dante Morrone | Mediterranean | 36°46’N, 05°08’E | Torpedo | Failed | HMS Pentstemon | Corvette | 940 | Great Britain | |
| 6/26/1940 | 02:45 | Atropo | C,F. Luigi Caneschi | Mediterranean | East of Amorgos | Torpedo | Failed | Unknown | Submarine | Unknown | ||
| 6/30/1940 | Sirena | T.V. Galletti | Mediterranean | 37°54’N-18°04’E | Machine Gun | Failed | Sunderland “Q” 228th Squadron, L.5806 | Aircraft | 18 | Great Britain | ||
| 7/24/1941 | 23:01 | Squalo | T.V. Ludovico Grion | Mediterranean | 32°20’N-24°53’E | Torpedo | Failed | Unknown | Tanker | United Kigdom | ||
| 8/22/1943 | 04:33 | Jalea | T.V. Pasquale Gigli | Mediterranean | 38°48’N-17°11’E | None | Abandoned | Motor torpedo boats | Unknown | |||
| 7/12/1940 | 03:25 | Turchese | T.V. Gustavo Miniero | Mediterranean | 38°24’N-09°19’E | Tordepo, Deck Gun | Failed | Unknown | Ship | Unknown | ||
| 12/13/1940 | 22:22 | Neghelli | T.V. Carlo Ferracuti | Mediterranean | 32°37’N-26°44’E | Torpedo | Damaged | H.M.S. Coventry | Anti-Aircraft Cruiser | 4190 | Great Britain | |
| 1/19/1941 | Neghelli | T.V. Carlo Ferracuti | Mediterranean | Torpedo | Failed | Psara | Destroyer | Greece | ||||
| 1/19/1941 | 11:53 | Neghelli | T.V. Carlo Ferracuti | Mediterranean | 37°15’N-24°04’E | Torpedo | Damaged | Clan Cumming | Steam Freighter | 7264 | Great Britain | |
| 06/12/1940 | Fisalia | T.V. Girolamo Acunto | Mediterranean | Off Alexandria | Torpedo | Failed | Unknown | Ship | Unknown | |||
| 06/21/1941 | 05:45 | Jantina | C.C. Vincenzo Politi | Mediterranean | 31°34’N-27°28’E | Torpedo | Failed | H.M.A.S. Parramatta | Sloop | 1060 | Australia | |
| 08/27/1941 | 02:58 | Bandiera | C.C. Carlo Forni | Mediterranean | 36°50’N-11°07’E | Torpedo | Failed | Deucalion | Motor Freighter | 7740 | Great Britain | |
| 04/19/1943 | Menotti | C.V. Ugo Gelli | Mediterranean | Strait of Sicily | Machine Gun | Shot down | Four-engine Aircraft | Unknown |