new ship arrived. The escorts were torn between staying with the convoy, abandoning survivors in the water, as DEMS regulations demanded, and picking them up, leaving the convoy unprotected and risking being torpedoed themselves. See also Battle of the Atlantic References Sources Paul Lund, Harry Ludlam: The Night of the U-Boats (1973) Dan van der Vat : The Atlantic Campaign (1988) Arnold Hague : The Allied Convoy System 1939–1945 (2000) . (Canada). (UK) John Keegan : Intelligence In War (2002) Further reading SC007 Naval battles of World War II involving Canada Naval battles of World War II involving Germany Naval battles of World War II involving the United Kingdom