Like U-571 before it, on the way to the patrol area U-575 took part in a patrol line, called Endrass, initially against convoy HG 84 along with five other boats. U-575 was then refueled west of the Azores by U-459 (Wynn, Vol. 1, p.51). The patrol began in Saint Nazaire on the 10th of June and ended there on the 7th of August 1942.
A member of the Class of 1933, Kapitänleutnant Günther Heydemann achieved that rank in April of 1941 while serving in the Seventh Flotilla out of St. Nazaire France, from which the boat sailed on this patrol. He joined U-boats in April 1940 after serving in line-of-battle ships before commissioning U-575 in the spring of 1941. Altogether Heydemann spent eight patrols and 395 sea days on this boat before becoming an instructor based on shore. His total career catch of eight ships sunk for 36,010 and one ship damaged for 12,910 earned him the Knights Cross in July 1943. He was to live until 1986 and the age of 71, passing away in Hamburg.
SOURCES: Gudmundur Helgason, Rainer Kolbicz, www.uboat.net, 2011, Kenneth Wynn, U-boat Operations of the Second World War, Volume 1 and Volume 2, 1997