"Hm Submarine Turbulent Has Almost Filled Her Jolly Roger. 12 To 14 February 1943, Algiers, Turbulent, One of the Most Successful British Submarines in the Present War Has Almost Filled Up the Spaces Left on Her Success Flag With the Symbols of Her Triumphs. the White Bars Denote Ships Sunk, White Stars Successful Gun Actions, and the Scimitars Symbolise "special Operations"." HM SUBMARINE TURBULENT's Jolly Roger flying after the ship had completed a successful patrol. In addition to ships which were sunk the crew shelled an Italian train, with success scoring no less than six direct hits, hence the marking of the train on the Jolly Roger.