German submarine U-578 sank Dutch ship Polyphemus 340 miles north of Bermuda just after 0000 hours; 15 were killed (all of Chinese ethnicity), 60 survived. German submarine U-172 sank British tanker Athelknight 1,260 miles northwest of Saint Barth_lemy island at 0319 hours; 9 were killed, 25 survived.