Kriegsmarine, Tactical Naval and Naval-Air Combat in the Atlantic and Mediterranean, 1939-1945.
SimCan says: "Three Spica class frigates slip silently through the Mediterranean night toward North Africa. In the light swells behind them follow half a dozen merchants carrying vital ammunition and petrol to the stalled Axis forces lying outside el Alamein. Without warning British warships appear off the port bow at only 1200 yards. The darkness is shattered by flash and gunfire. In six minutes it is over. Again the sea grows quiet, disturbed only by the occasional rattling hiss of a dying ship as the remnants of the Italian convoy limp on toward their destination."