"There was tremendous wealth and glamor on this 'unsinkable' ship, " he says.

CNN: 100 years later, Titanic's allure still strong

Because the allegedly unsinkable ship sank, its design and construction, as well as the number and disposition of the lifeboats, have often been the subject of debate.

NEWYORKER: Unsinkable

The conventional wisdom was that it was unsinkable.

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Some pieces serve as sturdy reminders of the 882-foot-long liner's "unsinkable" billing, such as a 17-ton piece of the hull that still contains thick rivets and porthole views into what would have been a pair of third-class cabins.

WSJ: Titanic Shipwreck Is Up for Sale at Guernsey's

One of those disputes is with the major construction contractor, a Chinese company called Metallurgical Corporation of China, another is with Clive Palmer, the self-made Australian millionaire with a plan to build a replica of Titanic, the unsinkable passenger liner that claimed 1502 lives when it sank in the North Atlantic in 1912.

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