German battleship Tirpitz fails to locate Allied convoys QP8 or PQ12 between Iceland and USSR but 12 Fairey Albacore torpedo bombers from British aircraft carrier HMS Victorious find Tirpitz off Vestfjord, Norway. They attack unsuccessfully and 2 Albacore are shot down. 3 German Ju88s unsuccessfully counterattack HMS Victorious.
Atlantic Ocean. 650 miles East of Florida, Italian submarine Tazzoli sinks Uruguayan SS Montevideo, previously Italian SS Adamello but seized by Uruguay in 1941 (14 killed, 35 rescued). At 2.25 AM 130 miles Southeast of New York, U-94 sinks Brazilian SS Cayrú (53 dead and 36 survivors). At 1.17 PM 10 miles off the East coast of Cuba, U-126 sinks Panamanian tanker MV Hanseat (all 39 crew escape in 4 lifeboats). At 6.45 PM 470 miles East of Halifax, Nova Scotia, U-587 sinks Greek SS Lily (all 32 crew escape in 2 lifeboats but 3 die of exposure, 29 picked up by Canadian corvette HMCS Sackville on March 13). At 9.09 PM 100 miles from Halifax, U-96 sinks Norwegian MV Tyr (all 31 crew abandon ship in 3 lifeboats, 18 men in 2 lifeboats rescued on March 10 and 11 but 13 men never found).
Overnight, 187 RAF bombers again inaccurately attack Essen, hitting 24 other towns the in Ruhr Valley (103 civilians killed, 336 injured).