What became the world's largest passenger ship by gross tonnage when it was delivered in October 2009?
Passenger ship the "Freedom of the Seas" of the Royal Caribbean line as the largest passenger ship ever built; however, "QM2" still hold the record for the largest ocean liner. The "Freedom of the Seas" was superseded by the "Oasis of the Seas" in October 2009. Because of changes in historic measurement systems, it is impossible to make meaningful and accurate comparisons of ship sizes over time beyond length. Three alternative forms of measurement are ship "volume", "weight", and weight of water it "displaces". A fourth, "deadweight tonnage" (DWT), is a measure of how much mass a ship can safely carry, and
Compensated gross tonnage Compensated gross tonnage Compensated Gross Tonnage (CGT) is an indicator of the amount of work that is necessary to build a given ship and is calculated by multiplying the tonnage of a ship by a coefficient, which is determined according to type and size of a particular ship. The standard CGT system was developed in 1977 by the OECD so that inter-country shipbuilding output could be reasonably compared, as different types of ships require a greater or lesser degree of work relative to their gross tonnage. For example, passenger ferry of a given size would require substantially more work to