Marco Polo is not a converted icebreaker. She is a proper old-school ocean liner built for worldwide service. She has some icebreaking capabilities, because her original home port was St Petersburg and the Gulf of Finland has lots of ice in the winter. Please google "Finnish-Swedish ice class" for an explanation. The ice classes are (from strongest to weakest) 1A Super, 1A, 1B and 1C. Marco Polo's ice class is 1C, which means she would need icebreaker assistance in tough ice conditions. Every ferry and cruiseferry trading in the northern Baltic Sea is certified as 1A or 1A Super. They have to be, otherwise they couldn't maintain a year-round service between Helsinki and Stockholm, for example. You see 1C mostly in cargo ships. So, nothing special in Marco Polo's capabilities -- it's just that the marketing people have decided to always mention her "icebreaking capabilities". Marco Polo's ice class 1C means she has *some* strengthening in her bow, rudder and propellers, but not much.