Riverine Flotilla of the Polish Navy order of battle ORP Wilia ORP Batory Grom-class destroyer (1939) Orzeł-class submarine Grom-class destroyer Wicher-class destroyer ORP Piorun (G65) Filin-class guard ship Jaskółka-class minesweeper French cruiser D'Entrecasteaux Wilk-class submarine SS Kościuszko ORP Mazur ORP Gryf (1936) ORP Jastrząb ORP Orkan (G90) Vessels of Polish Riverine Flotilla List of shipwrecks in September 1939