1 Jun Clyde sinks San Marco of 3075 tons (Sardinia)
1 Jun Taku sinks Valorosa and two small ships totalling 489 tons (Benghazi)
1 Jun Torbay sinks two calques (Aegean)
3 Jun Unique sinks Arsia of 735 tons (Lampedusa)
3 Jun Parthian damages Strombo of 5230 tons (Aegean)
6 Jun Torbay sinks Alberta of 3360 tons (Dardanelles)
8 Jun Clyde sinks Sturla of 1198 tons (Tyrrhanian Sea)
8 Jun Parthian sinks two schooners and a lighter (Mitylene)
10 Jun Torbay sinks a calque and a schooner (Aegean)
10 Jun Torbay sinks Guiseppini Gheradi of 3320 tons (Dardanelles)
11 Jun Taku sinks Tilly L M Russ of 1600 tons (Benghazi)
12 Jun Taku sinks Silvio Scaroni of 1365 tons (Sirte)
12 Jun O24 sinks Fianona of 6660 tons (Genoa)
12 Jun O24 sinks schooner of 500 tons (Genoa)
14 Jun Clyde sinks Gugliemi of 990 tons (W. Med)
22 Jun Union sinks Pietro Querini of 1005 tons (E. Tunisia)
25 Jun Parthian sinks French Submarine Souffleur (Beirut)
26 Jun Utmost sinks Enrico Costa of 4080 tons (N. Sicily)
26 Jun Severn sinks Polinnia of 1200 tons (Naples)
27 Jun Triumph sinks Italian U-boat Salpa (Mersa Matruh)
28 Jun Severn sinks Ugo Bassi of 2900 tons (Sardinia)
30 Jun O23 sinks Capacitas of 5370 tons (Leghorn)
30 Jun Torbay sinks calque (Aegean)
2 July Torbay sinks Citta Di Tripoli of 2935 tons (Aegean)
3 July Upholder sinks Laura Cosulich of 5870 tons (E
Calabria)
5 July Torbay sinks Italian U-boat Jantina (Aegean)
5 July Triumph sinks Ninfea of 607 tons (Benghazi)
6 July Triumph sinks A/S trawler De Lutti (Benghazi)
10 July Torbay sinks Strombo of 5230 tons (Aegean)
13 July Taku sinks Caldea of 2705 tons (Benghazi)
14 July Taku sinks schooner (Benghazi)
15 July P33 sinks Barbarigo of 5295 tons (Pantellaria)
15 July Unbeaten sinks a large schooner (Tripoli)
24 July Upholder damages a ship of 4964 tons (N Sicily)
27 July Tetrarch sinks a calque (Aegean)
28 July Upholder damages light cruiser Garibaldi (NW Sicily)
28 July Utmost sinks Federico of 1455 tons (W Calabria)
28 July Olympus sinks Monteponi of 750 tons (Sardinia)
31 July Regent sinks schooner Igen of 160 tons (Sirte)
2 Aug O21 sinks barquentine (Sardinia)
6 Aug O21 sinks Bombarleri of 615 tons (Tyrrhenian Sea)
6 Aug O24 sinks schooner M. Madu of 295 tons
16 Aug Torbay sinks a schooner (Benghazi)
20 Aug Unique sinks Esperia of 11.400 tons (Tripoli)
20 Aug Upholder sinks Enotria of 850 tons (NW Sicily)
22 Aug Upholder sinks Lussin of 3990 tons (NW Sicily)
23 Aug Tetrarch sinks Fratelli Garre of 413 tons (Sirte)
24 Aug Tetrarch sinks Francesco Garre of 395 tons (Sirte)
26 Aug Triumph damages the cruiser Bolzano (N Messina)
27 Aug Urge damages Aquitania of 4071 tons (Naples)
28 Aug Unbeaten sinks AS Trawler Alfa (S Messina)
28 Aug Rorqual sinks Cilicia of 5740 tons (Tyrrhenian Sea)
30 Aug Talisman sinks Calque (Sirte)
5 Sep O21 sinks Isarco of 5740 tons (Tyrrhenian Sea)
5 Sep Perseus sinks Maya of 3865 tons (N Aegean)
5 Sep Perseus damages a tanker in same convoy
6 Sep O23 sinks barque Carla of 347 tons (G of Genoa)
7 Sep Thunderbolt sinks Sirena of 975 tons (Benghazi)
8 Sep Thunderbolt sinks Svan I of 388 tons (Sirte)
10 Sep O24 sinks Italo Balbo of 5115 tons (Elba)
11 Sep Thunderbolt sinks Livorno of 1830 tons (Benghazi)
18 Sep Upholder sinks Oceania of 19,405 tons (Tripoli)