"The Polish Navy in the Second World War" Gun crews at work cleaning the single 120 mm QF Bofors M34/36 gun on board the Polish Navy destroyer ORP Błyskawica (Lightning) whilst she is in port. This and another Polish destroyer, ORP Burza (Storm), did fine work both in convoying and in actions at Narvik and Dunkirk and are reported to have accounted for six enemy planes and two submarines.