Polish Navy personnel to come under Royal Navy command comprised 1,400 officers and 4,750 sailors. By chance, Poland's only two ocean-going commercial liners, MS "Piłsudski" and MS "Batory" were also on the high seas on 1 September 1939 and were both shortly thereafter requisitioned by the British Admiralty for war service. The former was lost in November 1939 when it struck a mine off the Yorkshire coast. "Batory", dubbed ""the Lucky ship"", became a troop and civilian carrier and hospital ship. It effected a major evacuation during the Battle of Narvik and completed hundreds of convoys on the Mediterranean Sea and on the Atlantic, before being surrendered to the control of the communist authorities in Warsaw in 1946.