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The Ulsan Express container ship, operated by Hapag-Lloyd AG, is seen from the deck of the Quantum of the Seas cruise ship, operated by Royal Caribbean Cruises Ltd., as it is guided by tugs into Southampton Docks in Southampton, U.K., on Friday, Oct. 31, 2014. Royal Caribbean's newest ship Quantum of the Seas is one-third smaller than its Oasis-class ships, but is fitted out with onboard activities such as bumper-cars and robotic bar tenders. Photographer: Simon Dawson/Bloomberg via Getty Images

The Ulsan Express container ship, operated by Hapag-Lloyd AG, is seen from the deck of the Quantum of the Seas cruise ship, operated by Royal Caribbean Cruises Ltd., as it is guided by tugs into Southampton Docks in Southampton, U.K., on Friday, Oct. 31, 2014. Royal Caribbean's newest ship Quantum of the Seas is one-third smaller than its Oasis-class ships, but is fitted out with onboard activities such as bumper-cars and robotic bar tenders. Photographer: Simon Dawson/Bloomberg via Getty Images