Polish Ocean Lines is a Polish commercial shipping company, with headquarters in Gdynia. The company was created in 1951 in a merger of three smaller shipping companies. Currently, PLO acts as a holding company for 12 other shipping companies.

MS Batory was a Polish ocean liner which was the flagship of Gdynia-America Line, named after Stefan Batory, the sixteenth-century King of Poland. She was the sister ship of MS Piłsudski. After Allied wartime service, mainly under the UK Admiralty, she became in 1951 the flagship of the Polish Ocean Lines and the Polish merchant fleet. She is often described as the "Pride of the Polish Merchant Marine". Batory along with her sister Piłsudski were the two most popular ocean liners of Poland.