As one of the boats involved in Operation Drumbeat (U-boat operations off the eastern seaboard of the North America), Gannon, Michael - Operation Drumbeat - the dramatic true story of Germany's first U-boat attacks along the American coast in World War II, 1990, Harper and Row publishers, , p. 489 U-576 sank the Pipestone County on 21 April 1942, 475 nautical miles east of Cape Henry, Virginia.