Battle of the Atlantic

German seaplanes begin minelaying operations in the shipping lanes outside British east coast harbors. The minesweeper HMS Mastiff (520t) is blown up by a mine as she tries to recover it. Minelaying Operations

• The British naval trawler Mastiff (520t) sinks on a mine 1 mile off the Tongue. 5 of the crew are lost and 1 dies from wounds. The survivors are rescued by the Margate lifeboat and the British minesweeping trawler Cape Spartel.
• The German merchant ship Bertha Fisser (4110t) is intercepted by the British armed merchant cruiser Chitral southeast of Iceland. She scuttles herself and her 32 man crew is picked up by the Chitral.
• The French auxiliary minesweeper Sainte Claire (57t) is sunk by a mine laid by U-16 on October 22 10 miles southeast of Folkestone. 11 crewmen are lost.
• U-33 sinks the British trawler Sea Sweeper (329t) 25 miles NNW of Tory Island, the British trawler Delphine (250t) 20 miles northeast of Tory Island, and the British trawler Thomas Hankins (276t) 14 miles northwest of Tory Island. The crews of all 3 trawlers are picked up.