The German crew remained on board "U-570" overnight; they made no attempt to scuttle their boat as "Northern Chief" had signalled she would open fire and not rescue survivors from the water if they did this ("Northern Chief"s captain, N.L. Knight, had been ordered to prevent the submarine from being scuttled by any means.) During the night, five more Allied vessels reached the scene: the armed trawler "Kingston Agate", two anti-submarine whalers, the Royal Navy destroyer , and the Canadian destroyer .