Short answers, pulled from the story.
Passenger ships stopped carrying cargo in the late twentieth century. Modern cruise ships and more recent ocean liners eliminated cargo capacity entirely to focus on moving people for pleasure or scheduled travel.
Knut Kloster, the director of Norwegian Caribbean Lines, purchased one of the biggest surviving liners in the 1980s. He transformed the vessel into a huge cruise ship and renamed it the SS Norway.
The Freedom of the Seas of the Royal Caribbean line superseded the Queen Mary 2 as the largest passenger ship ever built in 2009. The Freedom of the Seas was subsequently superseded by the Oasis of the Seas in October 2009.
Gross register tonnage was a measure of the internal volume of certain enclosed areas of a ship divided into tons equivalent to 100 cubic feet of space. Gross tonnage is a comparatively new measure adopted in 1982 to replace GRT, calculated based on the moulded volume of all enclosed spaces of the ship.
The International Ice Patrol was formed in 1914 after the sinking of the Titanic. This organization was created to address the long-outstanding issue of iceberg collision and monitor ice in the North Atlantic.
After the 1st of October 2010, the International Convention for the Safety of Life at Sea requires passenger ships operating in international waters to exclude combustible materials. Ships ordered after July 2010 must also conform to safe return to port regulations.