A surfer demonstrates the 'FlowRider' a simulated wave maker [Getty Images]

UNITED KINGDOM - APRIL 29: A surfer demonstrates the 'FlowRider' a simulated wave maker on board the Royal Caribbean International owned 'Freedom of the Seas' the world's largest cruise liner docked at Southampton harbour, Saturday April 29, 2006. (Photo by Graham Barclay/Bloomberg via Getty Images)

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