. "Wolf pack Hai"@en . . . . . . . "Hai (English : \"Shark\") was a wolfpack of German U-boats that operated from 3 to 21 July 1942 in the Battle of the Atlantic during World War II. They attacked the Liverpool to Freetown, Sierra Leone convoy OS-33, sinking eight ships for a total of ."@en . "Hai (English : \"Shark\") was a wolfpack of German U-boats that operated from 3 to 21 July 1942 in the Battle of the Atlantic during World War II. They attacked the Liverpool to Freetown, Sierra Leone convoy OS-33, sinking eight ships for a total of ."@en . .