German submarine U-100 sank British ship Empire Merchant 150 miles northwest of Ireland, killing 7. 48 survivors were rescued by tug HMS Salvonia. 150 miles further northwest, a German submarine wolfpack consisted of U-30, U-46, and U-48 attacked Allied convoy OB-197, sinking Swedish ship Hedrun (8 killed, 20 survived) and British ship Clan Macphee (67 killed, 41 survived), and damaging Dutch ship Alcinous. In the same general area 170 miles northwest of Ireland, British Coastal Command Sunderland flying boats of 210 Squadron attacked German submarine U-51 with depth charges; U-51 narrowly survived the attack; this was the first successful use of aircraft against a German submarine.
