Wolfpack Endrass

Endrass was a "wolfpack" of German U-boats that operated from 12 to 17 June 1942 in attacking Convoy HG 84 that comprised 23 Allied ships. The group was named after the U-boat commander Engelbert Endrass, who had been killed in action in December 1941.
Ships hit by this Wolfpack.
Five ships of Convoy HG 84, assembled at Gibraltar for passage to Liverpool, were sunk, all by the U-boat "U-552" in the early hours of 15 June.
Etrib, Pelayo & Slemdal.
The first attack came at 00:59, about west of Corunna, Spain, when "U-552" fired torpedoes at the convoy and hit and sank the 1,943-ton British merchant ship "Etrib", the 1,346-ton British merchant ship "Pelayo", and the 7,374-ton Norwegian tanker "Slemdal".
"City of Oxford" and "Thurso".
"U-552" struck again at 04:34, firing three torpedoes at the convoy. Two British merchant ships, the 2,759-ton and the 2,436-ton were hit and sunk.