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Lights illuminate the Quantum of the Seas cruise ship, operated by Royal Caribbean Cruises Ltd., as it sits moored to a berth at Southampton Docks at night 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

Lights illuminate the Quantum of the Seas cruise ship, operated by Royal Caribbean Cruises Ltd., as it sits moored to a berth at Southampton Docks at night 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